GNUnet 0.21.2
Scheduler library

Event loop (scheduler) More...

Collaboration diagram for Scheduler library:

Data Structures

struct  GNUNET_SCHEDULER_FdInfo
 Information about an event relating to a file descriptor/socket. More...
 
struct  GNUNET_SCHEDULER_TaskContext
 Context information passed to each scheduler task. More...
 
struct  GNUNET_SCHEDULER_Driver
 API an external event loop has to implement for GNUNET_SCHEDULER_driver_init. More...
 

Typedefs

typedef void(* GNUNET_SCHEDULER_TaskCallback) (void *cls)
 Signature of the main function of a task. More...
 
typedef int(* GNUNET_SCHEDULER_select) (void *cls, struct GNUNET_NETWORK_FDSet *rfds, struct GNUNET_NETWORK_FDSet *wfds, struct GNUNET_NETWORK_FDSet *efds, struct GNUNET_TIME_Relative timeout)
 Signature of the select function used by the scheduler. More...
 

Enumerations

enum  GNUNET_SCHEDULER_Reason {
  GNUNET_SCHEDULER_REASON_NONE = 0 , GNUNET_SCHEDULER_REASON_STARTUP = 1 , GNUNET_SCHEDULER_REASON_SHUTDOWN = 2 , GNUNET_SCHEDULER_REASON_TIMEOUT = 4 ,
  GNUNET_SCHEDULER_REASON_READ_READY = 8 , GNUNET_SCHEDULER_REASON_WRITE_READY = 16 , GNUNET_SCHEDULER_REASON_PREREQ_DONE = 32
}
 Reasons why the schedule may have triggered the task now. More...
 
enum  GNUNET_SCHEDULER_EventType {
  GNUNET_SCHEDULER_ET_NONE = 0 , GNUNET_SCHEDULER_ET_IN = 1 , GNUNET_SCHEDULER_ET_OUT = 2 , GNUNET_SCHEDULER_ET_HUP = 4 ,
  GNUNET_SCHEDULER_ET_ERR = 8 , GNUNET_SCHEDULER_ET_PRI = 16 , GNUNET_SCHEDULER_ET_NVAL = 32
}
 Possible events on FDs, used as a bitmask. More...
 

Functions

void GNUNET_SCHEDULER_task_ready (struct GNUNET_SCHEDULER_Task *task, struct GNUNET_SCHEDULER_FdInfo *fdi)
 Function used by event-loop implementations to signal the scheduler that a particular task is ready due to an event specified in the et field of fdi. More...
 
int GNUNET_SCHEDULER_do_work (struct GNUNET_SCHEDULER_Handle *sh)
 Function called by external event loop implementations to tell the scheduler to run some of the tasks that are ready. More...
 
struct GNUNET_SCHEDULER_HandleGNUNET_SCHEDULER_driver_init (const struct GNUNET_SCHEDULER_Driver *driver)
 Function called by external event loop implementations to initialize the scheduler. More...
 
void GNUNET_SCHEDULER_driver_done (struct GNUNET_SCHEDULER_Handle *sh)
 Counter-part of GNUNET_SCHEDULER_driver_init. More...
 
struct GNUNET_SCHEDULER_DriverGNUNET_SCHEDULER_driver_select (void)
 Obtain the driver for using select() as the event loop. More...
 
void GNUNET_SCHEDULER_run (GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
 Initialize and run scheduler. More...
 
void GNUNET_SCHEDULER_run_with_optional_signals (int install_signals, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
 Initialize and run scheduler. More...
 
void GNUNET_SCHEDULER_shutdown (void)
 Request the shutdown of a scheduler. More...
 
unsigned int GNUNET_SCHEDULER_get_load (enum GNUNET_SCHEDULER_Priority p)
 Get information about the current load of this scheduler. More...
 
const struct GNUNET_SCHEDULER_TaskContextGNUNET_SCHEDULER_get_task_context (void)
 Obtain the reasoning why the current task was started. More...
 
void * GNUNET_SCHEDULER_cancel (struct GNUNET_SCHEDULER_Task *task)
 Cancel the task with the specified identifier. More...
 
void GNUNET_SCHEDULER_add_with_reason_and_priority (GNUNET_SCHEDULER_TaskCallback task, void *task_cls, enum GNUNET_SCHEDULER_Reason reason, enum GNUNET_SCHEDULER_Priority priority)
 Continue the current execution with the given function. More...
 
struct GNUNET_SCHEDULER_TaskGNUNET_SCHEDULER_add_with_priority (enum GNUNET_SCHEDULER_Priority prio, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
 Schedule a new task to be run with a specified priority. More...
 
struct GNUNET_SCHEDULER_TaskGNUNET_SCHEDULER_add_now (GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
 Schedule a new task to be run as soon as possible. More...
 
struct GNUNET_SCHEDULER_TaskGNUNET_SCHEDULER_add_shutdown (GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
 Schedule a new task to be run on shutdown, that is when a CTRL-C signal is received, or when GNUNET_SCHEDULER_shutdown() is being invoked. More...
 
struct GNUNET_SCHEDULER_TaskGNUNET_SCHEDULER_add_now_with_lifeness (int lifeness, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
 Schedule a new task to be run as soon as possible with the (transitive) ignore-shutdown flag either explicitly set or explicitly enabled. More...
 
struct GNUNET_SCHEDULER_TaskGNUNET_SCHEDULER_add_delayed (struct GNUNET_TIME_Relative delay, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
 Schedule a new task to be run with a specified delay. More...
 
struct GNUNET_SCHEDULER_TaskGNUNET_SCHEDULER_add_at (struct GNUNET_TIME_Absolute at, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
 Schedule a new task to be run at the specified time. More...
 
struct GNUNET_SCHEDULER_TaskGNUNET_SCHEDULER_add_delayed_with_priority (struct GNUNET_TIME_Relative delay, enum GNUNET_SCHEDULER_Priority priority, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
 Schedule a new task to be run with a specified delay. More...
 
struct GNUNET_SCHEDULER_TaskGNUNET_SCHEDULER_add_at_with_priority (struct GNUNET_TIME_Absolute at, enum GNUNET_SCHEDULER_Priority priority, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
 Schedule a new task to be run at the specified time. More...
 
struct GNUNET_SCHEDULER_TaskGNUNET_SCHEDULER_add_read_net (struct GNUNET_TIME_Relative delay, struct GNUNET_NETWORK_Handle *rfd, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
 Schedule a new task to be run with a specified delay or when the specified file descriptor is ready for reading. More...
 
struct GNUNET_SCHEDULER_TaskGNUNET_SCHEDULER_add_read_net_with_priority (struct GNUNET_TIME_Relative delay, enum GNUNET_SCHEDULER_Priority priority, struct GNUNET_NETWORK_Handle *rfd, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
 Schedule a new task to be run with a specified priority and to be run after the specified delay or when the specified file descriptor is ready for reading. More...
 
struct GNUNET_SCHEDULER_TaskGNUNET_SCHEDULER_add_write_net (struct GNUNET_TIME_Relative delay, struct GNUNET_NETWORK_Handle *wfd, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
 Schedule a new task to be run with a specified delay or when the specified file descriptor is ready for writing. More...
 
struct GNUNET_SCHEDULER_TaskGNUNET_SCHEDULER_add_net_with_priority (struct GNUNET_TIME_Relative delay, enum GNUNET_SCHEDULER_Priority priority, struct GNUNET_NETWORK_Handle *fd, int on_read, int on_write, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
 Schedule a new task to be run with a specified delay or when the specified file descriptor is ready. More...
 
struct GNUNET_SCHEDULER_TaskGNUNET_SCHEDULER_add_read_file (struct GNUNET_TIME_Relative delay, const struct GNUNET_DISK_FileHandle *rfd, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
 Schedule a new task to be run with a specified delay or when the specified file descriptor is ready for reading. More...
 
struct GNUNET_SCHEDULER_TaskGNUNET_SCHEDULER_add_write_file (struct GNUNET_TIME_Relative delay, const struct GNUNET_DISK_FileHandle *wfd, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
 Schedule a new task to be run with a specified delay or when the specified file descriptor is ready for writing. More...
 
struct GNUNET_SCHEDULER_TaskGNUNET_SCHEDULER_add_file_with_priority (struct GNUNET_TIME_Relative delay, enum GNUNET_SCHEDULER_Priority priority, const struct GNUNET_DISK_FileHandle *fd, int on_read, int on_write, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
 Schedule a new task to be run with a specified delay or when the specified file descriptor is ready. More...
 
struct GNUNET_SCHEDULER_TaskGNUNET_SCHEDULER_add_select (enum GNUNET_SCHEDULER_Priority prio, struct GNUNET_TIME_Relative delay, const struct GNUNET_NETWORK_FDSet *rs, const struct GNUNET_NETWORK_FDSet *ws, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
 Schedule a new task to be run with a specified delay or when any of the specified file descriptor sets is ready. More...
 
void GNUNET_SCHEDULER_set_select (GNUNET_SCHEDULER_select new_select, void *new_select_cls)
 Sets the select function to use in the scheduler (scheduler_select). More...
 
void GNUNET_SCHEDULER_begin_async_scope (struct GNUNET_AsyncScopeId *aid)
 Change the async scope for the currently executing task and (transitively) for all tasks scheduled by the current task after calling this function. More...
 

Detailed Description

Event loop (scheduler)

Schedule computations using continuation passing style.

Typedef Documentation

◆ GNUNET_SCHEDULER_TaskCallback

typedef void(* GNUNET_SCHEDULER_TaskCallback) (void *cls)

Signature of the main function of a task.

Parameters
clsclosure

Definition at line 323 of file gnunet_scheduler_lib.h.

◆ GNUNET_SCHEDULER_select

typedef int(* GNUNET_SCHEDULER_select) (void *cls, struct GNUNET_NETWORK_FDSet *rfds, struct GNUNET_NETWORK_FDSet *wfds, struct GNUNET_NETWORK_FDSet *efds, struct GNUNET_TIME_Relative timeout)

Signature of the select function used by the scheduler.

GNUNET_NETWORK_socket_select matches it.

Parameters
clsclosure
rfdsset of sockets to be checked for readability
wfdsset of sockets to be checked for writability
efdsset of sockets to be checked for exceptions
timeoutrelative value when to return
Returns
number of selected sockets, GNUNET_SYSERR on error

Definition at line 400 of file gnunet_scheduler_lib.h.

Enumeration Type Documentation

◆ GNUNET_SCHEDULER_Reason

Reasons why the schedule may have triggered the task now.

Enumerator
GNUNET_SCHEDULER_REASON_NONE 

This task is not ready.

GNUNET_SCHEDULER_REASON_STARTUP 

This is the very first task run during startup.

GNUNET_SCHEDULER_REASON_SHUTDOWN 

We are shutting down and are running all shutdown-related tasks.

GNUNET_SCHEDULER_REASON_TIMEOUT 

The specified timeout has expired.

(also set if the delay given was 0).

GNUNET_SCHEDULER_REASON_READ_READY 

The reading socket is ready.

GNUNET_SCHEDULER_REASON_WRITE_READY 

The writing socket is ready.

GNUNET_SCHEDULER_REASON_PREREQ_DONE 

The prerequisite task is done.

Definition at line 59 of file gnunet_scheduler_lib.h.

60{
65
70
75
81
86
91
96};
@ GNUNET_SCHEDULER_REASON_TIMEOUT
The specified timeout has expired.
@ GNUNET_SCHEDULER_REASON_READ_READY
The reading socket is ready.
@ GNUNET_SCHEDULER_REASON_SHUTDOWN
We are shutting down and are running all shutdown-related tasks.
@ GNUNET_SCHEDULER_REASON_NONE
This task is not ready.
@ GNUNET_SCHEDULER_REASON_STARTUP
This is the very first task run during startup.
@ GNUNET_SCHEDULER_REASON_WRITE_READY
The writing socket is ready.
@ GNUNET_SCHEDULER_REASON_PREREQ_DONE
The prerequisite task is done.

◆ GNUNET_SCHEDULER_EventType

Possible events on FDs, used as a bitmask.

Modelled after GPollFD.

Enumerator
GNUNET_SCHEDULER_ET_NONE 

No event (useful for timeout).

GNUNET_SCHEDULER_ET_IN 

Data available for reading.

GNUNET_SCHEDULER_ET_OUT 

Buffer available for writing.

GNUNET_SCHEDULER_ET_HUP 
GNUNET_SCHEDULER_ET_ERR 
GNUNET_SCHEDULER_ET_PRI 
GNUNET_SCHEDULER_ET_NVAL 

Definition at line 108 of file gnunet_scheduler_lib.h.

109{
114
119
124
129
134
139
144};
@ GNUNET_SCHEDULER_ET_OUT
Buffer available for writing.
@ GNUNET_SCHEDULER_ET_HUP
@ GNUNET_SCHEDULER_ET_NONE
No event (useful for timeout).
@ GNUNET_SCHEDULER_ET_NVAL
@ GNUNET_SCHEDULER_ET_IN
Data available for reading.
@ GNUNET_SCHEDULER_ET_PRI
@ GNUNET_SCHEDULER_ET_ERR

Function Documentation

◆ GNUNET_SCHEDULER_task_ready()

void GNUNET_SCHEDULER_task_ready ( struct GNUNET_SCHEDULER_Task task,
struct GNUNET_SCHEDULER_FdInfo fdi 
)

Function used by event-loop implementations to signal the scheduler that a particular task is ready due to an event specified in the et field of fdi.

This function will then queue the task to notify the application that the task is ready (with the respective priority).

Parameters
taskthe task that is ready
fdiinformation about the related FD

Definition at line 1953 of file scheduler.c.

1955{
1956 enum GNUNET_SCHEDULER_Reason reason;
1957
1958 reason = task->reason;
1959 if ((0 == (reason & GNUNET_SCHEDULER_REASON_READ_READY)) &&
1960 (0 != (GNUNET_SCHEDULER_ET_IN & fdi->et)))
1962 if ((0 == (reason & GNUNET_SCHEDULER_REASON_WRITE_READY)) &&
1963 (0 != (GNUNET_SCHEDULER_ET_OUT & fdi->et)))
1966 task->reason = reason;
1967 if (GNUNET_NO == task->in_ready_list)
1968 {
1971 task);
1972 queue_ready_task (task);
1973 }
1974}
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
@ GNUNET_NO
GNUNET_SCHEDULER_Reason
Reasons why the schedule may have triggered the task now.
static void queue_ready_task(struct GNUNET_SCHEDULER_Task *task)
Put a task that is ready for execution into the ready queue.
Definition: scheduler.c:546
static struct GNUNET_SCHEDULER_Task * pending_head
Head of list of tasks waiting for an event.
Definition: scheduler.c:324
static struct GNUNET_SCHEDULER_Task * pending_tail
Tail of list of tasks waiting for an event.
Definition: scheduler.c:329
enum GNUNET_SCHEDULER_EventType et
Type of the event that was generated related to sock.
int in_ready_list
Is this task in the ready list?
Definition: scheduler.c:230
enum GNUNET_SCHEDULER_Reason reason
Why is the task ready? Set after task is added to ready queue.
Definition: scheduler.c:199

References GNUNET_SCHEDULER_FdInfo::et, GNUNET_CONTAINER_DLL_remove, GNUNET_NO, GNUNET_SCHEDULER_ET_IN, GNUNET_SCHEDULER_ET_OUT, GNUNET_SCHEDULER_REASON_PREREQ_DONE, GNUNET_SCHEDULER_REASON_READ_READY, GNUNET_SCHEDULER_REASON_WRITE_READY, GNUNET_SCHEDULER_Task::in_ready_list, pending_head, pending_tail, queue_ready_task(), and GNUNET_SCHEDULER_Task::reason.

Referenced by select_loop().

Here is the call graph for this function:
Here is the caller graph for this function:

◆ GNUNET_SCHEDULER_do_work()

int GNUNET_SCHEDULER_do_work ( struct GNUNET_SCHEDULER_Handle sh)

Function called by external event loop implementations to tell the scheduler to run some of the tasks that are ready.

Must be called only after GNUNET_SCHEDULER_driver_init has been called and before GNUNET_SCHEDULER_driver_done is called. This function may return even though there are tasks left to run just to give other tasks a chance as well. If we return GNUNET_YES, the event loop implementation should call this function again as soon as possible, while if we return GNUNET_NO it must block until either the operating system has more work (the scheduler has no more work to do right now) or the timeout set by the scheduler (using the set_wakeup callback) is reached.

Parameters
shscheduler handle that was returned by GNUNET_SCHEDULER_driver_init
Returns
GNUNET_YES if there are more tasks that are ready, and thus we would like to run more (yield to avoid blocking other activities for too long) GNUNET_NO if we are done running tasks (yield to block)

The event loop called this function before the current timeout was reached (and no FD tasks are ready). This is acceptable if

  • the system time was changed while the driver was waiting for the timeout
  • an external event loop called GNUnet API functions outside of the callbacks called in GNUNET_SCHEDULER_do_work and thus wasn't notified about the new timeout

It might also mean we are busy-waiting because of a programming error in the external event loop.

the current timeout was reached but no ready tasks were found, internal scheduler error!

Definition at line 1998 of file scheduler.c.

1999{
2000 struct GNUNET_SCHEDULER_Task *pos;
2001 struct GNUNET_TIME_Absolute now;
2002
2003 /* check for tasks that reached the timeout! */
2004 now = GNUNET_TIME_absolute_get ();
2006 while (NULL != pos)
2007 {
2008 struct GNUNET_SCHEDULER_Task *next = pos->next;
2009 if (now.abs_value_us >= pos->timeout.abs_value_us)
2011 if (0 == pos->reason)
2012 break;
2015 pos);
2016 if (pending_timeout_last == pos)
2017 pending_timeout_last = NULL;
2018 queue_ready_task (pos);
2019 pos = next;
2020 }
2021 pos = pending_head;
2022 while (NULL != pos)
2023 {
2024 struct GNUNET_SCHEDULER_Task *next = pos->next;
2025 if (now.abs_value_us >= pos->timeout.abs_value_us)
2026 {
2030 pos);
2031 queue_ready_task (pos);
2032 }
2033 pos = next;
2034 }
2035
2036 if (0 == ready_count)
2037 {
2039
2040 if (timeout.abs_value_us > now.abs_value_us)
2041 {
2056 "GNUNET_SCHEDULER_do_work did not find any ready "
2057 "tasks and timeout has not been reached yet.\n");
2058 }
2059 else
2060 {
2065 GNUNET_assert (0);
2066 }
2067 }
2068 else
2069 {
2070 /* find out which task priority level we are going to
2071 process this time */
2074 /* yes, p>0 is correct, 0 is "KEEP" which should
2075 * always be an empty queue (see assertion)! */
2077 work_priority > 0;
2078 work_priority--)
2079 {
2081 if (NULL != pos)
2082 break;
2083 }
2084 GNUNET_assert (NULL != pos); /* ready_count wrong? */
2085
2086 /* process all *existing* tasks at this priority
2087 level, then yield */
2089 while (NULL != (pos = ready_head[work_priority])
2090 && pos != &pass_end_marker)
2091 {
2094 pos);
2095 ready_count--;
2098 active_task = pos;
2099#if PROFILE_DELAYS
2100 if (GNUNET_TIME_absolute_get_duration (pos->start_time).rel_value_us >
2101 DELAY_THRESHOLD.rel_value_us)
2102 {
2104 "Task %p took %s to be scheduled\n",
2105 pos,
2107 GNUNET_TIME_absolute_get_duration (pos->start_time),
2108 GNUNET_YES));
2109 }
2110#endif
2111 tc.reason = pos->reason;
2114 // FIXME: do we have to remove FdInfos from fds if they are not ready?
2115 tc.fds_len = pos->fds_len;
2116 tc.fds = pos->fds;
2117 for (unsigned int i = 0; i != pos->fds_len; ++i)
2118 {
2119 struct GNUNET_SCHEDULER_FdInfo *fdi = &pos->fds[i];
2120 if (0 != (GNUNET_SCHEDULER_ET_IN & fdi->et))
2121 {
2123 fdi->sock);
2124 }
2125 if (0 != (GNUNET_SCHEDULER_ET_OUT & fdi->et))
2126 {
2128 fdi->sock);
2129 }
2130 }
2131 tc.read_ready = sh->rs;
2132 tc.write_ready = sh->ws;
2134 "Running task %p\n",
2135 pos);
2136 GNUNET_assert (NULL != pos->callback);
2137 {
2138 struct GNUNET_AsyncScopeSave old_scope;
2139 if (pos->scope.have_scope)
2140 GNUNET_async_scope_enter (&pos->scope.scope_id, &old_scope);
2141 else
2142 GNUNET_async_scope_get (&old_scope);
2143 pos->callback (pos->callback_cls);
2144 GNUNET_async_scope_restore (&old_scope);
2145 }
2146 if (NULL != pos->fds)
2147 {
2148 int del_result = scheduler_driver->del (scheduler_driver->cls,
2149 pos);
2150 if (GNUNET_OK != del_result)
2151 {
2153 "driver could not delete task %p\n", pos);
2154 GNUNET_assert (0);
2155 }
2156 }
2157 active_task = NULL;
2158 dump_backtrace (pos);
2159 destroy_task (pos);
2160 }
2162 }
2164 if (0 == ready_count)
2165 {
2167 get_timeout ());
2168 return GNUNET_NO;
2169 }
2172 return GNUNET_YES;
2173}
static struct GNUNET_TIME_Relative timeout
User defined timestamp for completing operations.
Definition: gnunet-arm.c:119
static struct GNUNET_IDENTITY_Handle * sh
Handle to IDENTITY service.
void GNUNET_async_scope_enter(const struct GNUNET_AsyncScopeId *aid, struct GNUNET_AsyncScopeSave *old_scope)
Set the async scope for the current thread.
int have_scope
GNUNET_YES unless this saved scope is the unnamed root scope.
void GNUNET_async_scope_get(struct GNUNET_AsyncScopeSave *scope_ret)
Get the current async scope.
void GNUNET_async_scope_restore(struct GNUNET_AsyncScopeSave *old_scope)
Clear the current thread's async scope.
struct GNUNET_AsyncScopeId scope_id
Saved scope.
@ GNUNET_SCHEDULER_PRIORITY_COUNT
Number of priorities (must be the last priority).
@ GNUNET_SCHEDULER_PRIORITY_KEEP
Run with the same priority as the current job.
@ GNUNET_OK
@ GNUNET_YES
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
@ GNUNET_ERROR_TYPE_ERROR
@ GNUNET_ERROR_TYPE_DEBUG
void GNUNET_NETWORK_fdset_zero(struct GNUNET_NETWORK_FDSet *fds)
Reset FD set (clears all file descriptors).
Definition: network.c:917
void GNUNET_NETWORK_fdset_set_native(struct GNUNET_NETWORK_FDSet *to, int nfd)
Set a native fd in a set.
Definition: network.c:1057
struct GNUNET_TIME_Relative GNUNET_TIME_absolute_get_duration(struct GNUNET_TIME_Absolute whence)
Get the duration of an operation as the difference of the current time and the given start time "henc...
Definition: time.c:436
const char * GNUNET_STRINGS_relative_time_to_string(struct GNUNET_TIME_Relative delta, int do_round)
Give relative time in human-readable fancy format.
Definition: strings.c:570
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_get(void)
Get the current time.
Definition: time.c:111
static void dump_backtrace(struct GNUNET_SCHEDULER_Task *t)
Output stack trace of task t.
Definition: scheduler.c:600
static void destroy_task(struct GNUNET_SCHEDULER_Task *t)
Destroy a task (release associated resources)
Definition: scheduler.c:621
static struct GNUNET_SCHEDULER_Task * active_task
ID of the task that is running right now.
Definition: scheduler.c:368
static struct GNUNET_SCHEDULER_Task * ready_tail[GNUNET_SCHEDULER_PRIORITY_COUNT]
Tail of list of tasks ready to run right now, grouped by importance.
Definition: scheduler.c:379
static enum GNUNET_SCHEDULER_Priority current_priority
Priority of the task running right now.
Definition: scheduler.c:404
static void remove_pass_end_marker()
Definition: scheduler.c:515
#define DELAY_THRESHOLD
Task that were in the queue for longer than this are reported if PROFILE_DELAYS is active.
Definition: scheduler.c:74
static unsigned int ready_count
Number of tasks on the ready list.
Definition: scheduler.c:398
struct GNUNET_TIME_Absolute get_timeout()
chooses the nearest timeout from all pending tasks, to be used to tell the driver the next wakeup tim...
Definition: scheduler.c:477
static const struct GNUNET_SCHEDULER_Driver * scheduler_driver
The driver used for the event loop.
Definition: scheduler.c:319
static struct GNUNET_SCHEDULER_Task * pending_timeout_head
List of tasks waiting ONLY for a timeout event.
Definition: scheduler.c:348
static enum GNUNET_SCHEDULER_Priority work_priority
Priority used currently in GNUNET_SCHEDULER_do_work().
Definition: scheduler.c:420
static void shutdown_if_no_lifeness(void)
Definition: scheduler.c:699
static struct GNUNET_SCHEDULER_Task * pending_timeout_tail
List of tasks waiting ONLY for a timeout event.
Definition: scheduler.c:357
static struct GNUNET_SCHEDULER_Task * ready_head[GNUNET_SCHEDULER_PRIORITY_COUNT]
Head of list of tasks ready to run right now, grouped by importance.
Definition: scheduler.c:373
static struct GNUNET_SCHEDULER_Task pass_end_marker
Placed at the end of a ready queue to indicate where a scheduler run pass ends.
Definition: scheduler.c:256
static int current_lifeness
Value of the 'lifeness' flag for the current task.
Definition: scheduler.c:415
static void set_work_priority(enum GNUNET_SCHEDULER_Priority p)
Definition: scheduler.c:528
static enum GNUNET_SCHEDULER_Priority max_priority_added
Priority of the highest task added in the current select iteration.
Definition: scheduler.c:410
static struct GNUNET_SCHEDULER_Task * pending_timeout_last
Last inserted task waiting ONLY for a timeout event.
Definition: scheduler.c:363
#define LOG(kind,...)
Definition: scheduler.c:32
static struct GNUNET_SCHEDULER_TaskContext tc
Task context of the current task.
Definition: scheduler.c:431
Saved async scope identifier or root scope.
void * cls
Closure to pass to the functions in this struct.
void(* set_wakeup)(void *cls, struct GNUNET_TIME_Absolute dt)
Set time at which we definitively want to get a wakeup call.
int(* del)(void *cls, struct GNUNET_SCHEDULER_Task *task)
Delete a task from the set of tasks to be run.
Information about an event relating to a file descriptor/socket.
int sock
Underlying OS handle the event was about.
const struct GNUNET_NETWORK_FDSet * read_ready
Set of file descriptors ready for reading; note that additional bits may be set that were not in the ...
enum GNUNET_SCHEDULER_Reason reason
Reason why the task is run now.
unsigned int fds_len
Length of the following array.
const struct GNUNET_SCHEDULER_FdInfo * fds
Array of length fds_len with information about ready FDs.
const struct GNUNET_NETWORK_FDSet * write_ready
Set of file descriptors ready for writing; note that additional bits may be set that were not in the ...
Entry in list of pending tasks.
Definition: scheduler.c:136
enum GNUNET_SCHEDULER_Priority priority
Task priority.
Definition: scheduler.c:204
void * callback_cls
Closure for the callback.
Definition: scheduler.c:155
int lifeness
Should the existence of this task in the queue be counted as reason to not shutdown the scheduler?
Definition: scheduler.c:220
struct GNUNET_AsyncScopeSave scope
Asynchronous scope of the task that scheduled this scope,.
Definition: scheduler.c:248
struct GNUNET_SCHEDULER_Task * next
This is a linked list.
Definition: scheduler.c:140
struct GNUNET_SCHEDULER_FdInfo * fds
Information about which FDs are ready for this task (and why).
Definition: scheduler.c:160
unsigned int fds_len
Size of the fds array.
Definition: scheduler.c:172
struct GNUNET_TIME_Absolute timeout
Absolute timeout value for the task, or GNUNET_TIME_UNIT_FOREVER_ABS for "no timeout".
Definition: scheduler.c:185
GNUNET_SCHEDULER_TaskCallback callback
Function to run when ready.
Definition: scheduler.c:150
Time for absolute times used by GNUnet, in microseconds.
uint64_t abs_value_us
The actual value.
uint64_t rel_value_us
The actual value.

References GNUNET_TIME_Absolute::abs_value_us, active_task, GNUNET_SCHEDULER_Task::callback, GNUNET_SCHEDULER_Task::callback_cls, GNUNET_SCHEDULER_Driver::cls, current_lifeness, current_priority, GNUNET_SCHEDULER_Driver::del, DELAY_THRESHOLD, destroy_task(), dump_backtrace(), GNUNET_SCHEDULER_FdInfo::et, GNUNET_SCHEDULER_TaskContext::fds, GNUNET_SCHEDULER_Task::fds, GNUNET_SCHEDULER_TaskContext::fds_len, GNUNET_SCHEDULER_Task::fds_len, get_timeout(), GNUNET_assert, GNUNET_async_scope_enter(), GNUNET_async_scope_get(), GNUNET_async_scope_restore(), GNUNET_CONTAINER_DLL_remove, GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_NETWORK_fdset_set_native(), GNUNET_NETWORK_fdset_zero(), GNUNET_NO, GNUNET_OK, GNUNET_SCHEDULER_ET_IN, GNUNET_SCHEDULER_ET_OUT, GNUNET_SCHEDULER_PRIORITY_COUNT, GNUNET_SCHEDULER_PRIORITY_KEEP, GNUNET_SCHEDULER_REASON_TIMEOUT, GNUNET_STRINGS_relative_time_to_string(), GNUNET_TIME_absolute_get(), GNUNET_TIME_absolute_get_duration(), GNUNET_YES, GNUNET_AsyncScopeSave::have_scope, GNUNET_SCHEDULER_Task::lifeness, LOG, max_priority_added, GNUNET_SCHEDULER_Task::next, pass_end_marker, pending_head, pending_tail, pending_timeout_head, pending_timeout_last, pending_timeout_tail, GNUNET_SCHEDULER_Task::priority, queue_ready_task(), GNUNET_SCHEDULER_TaskContext::read_ready, ready_count, ready_head, ready_tail, GNUNET_SCHEDULER_TaskContext::reason, GNUNET_SCHEDULER_Task::reason, GNUNET_TIME_Relative::rel_value_us, remove_pass_end_marker(), scheduler_driver, GNUNET_SCHEDULER_Task::scope, GNUNET_AsyncScopeSave::scope_id, GNUNET_SCHEDULER_Driver::set_wakeup, set_work_priority(), sh, shutdown_if_no_lifeness(), GNUNET_SCHEDULER_FdInfo::sock, tc, timeout, GNUNET_SCHEDULER_Task::timeout, work_priority, and GNUNET_SCHEDULER_TaskContext::write_ready.

Referenced by select_loop().

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◆ GNUNET_SCHEDULER_driver_init()

struct GNUNET_SCHEDULER_Handle * GNUNET_SCHEDULER_driver_init ( const struct GNUNET_SCHEDULER_Driver driver)

Function called by external event loop implementations to initialize the scheduler.

An external implementation has to provide driver which contains callbacks for the scheduler (see definition of struct GNUNET_SCHEDULER_Driver). The callbacks are used to instruct the external implementation to watch for events. If it detects any of those events it is expected to call GNUNET_SCHEDULER_do_work to let the scheduler handle it. If an event is related to a specific task (e.g. the scheduler gave instructions to watch a file descriptor), the external implementation is expected to mark that task ready before by calling GNUNET_SCHEDULER_task_ready.

This function has to be called before any tasks are scheduled and before GNUNET_SCHEDULER_do_work is called for the first time. It allocates resources that have to be freed again by calling GNUNET_SCHEDULER_driver_done.

This function installs the same signal handlers as GNUNET_SCHEDULER_run. This means SIGTERM (and other similar signals) will induce a call to GNUNET_SCHEDULER_shutdown during the next call to GNUNET_SCHEDULER_do_work. As a result, SIGTERM causes all active tasks to be scheduled with reason GNUNET_SCHEDULER_REASON_SHUTDOWN. (However, tasks added afterwards will execute normally!). Note that any particular signal will only shut down one scheduler; applications should always only create a single scheduler.

Parameters
driverto use for the event loop
Returns
handle to be passed to GNUNET_SCHEDULER_do_work and GNUNET_SCHEDULER_driver_done

Definition at line 2208 of file scheduler.c.

2209{
2211 const struct GNUNET_DISK_FileHandle *pr;
2212
2213 /* scheduler must not be running */
2216 /* general set-up */
2222 my_pid = getpid ();
2223 scheduler_driver = driver;
2224
2225 /* install signal handlers */
2227 "Registering signal handlers\n");
2228 sh->shc_int = GNUNET_SIGNAL_handler_install (SIGINT,
2230 sh->shc_term = GNUNET_SIGNAL_handler_install (SIGTERM,
2232#if (SIGTERM != GNUNET_TERM_SIG)
2235#endif
2236 sh->shc_pipe = GNUNET_SIGNAL_handler_install (SIGPIPE,
2238 sh->shc_quit = GNUNET_SIGNAL_handler_install (SIGQUIT,
2240 sh->shc_hup = GNUNET_SIGNAL_handler_install (SIGHUP,
2242
2243 /* Setup initial tasks */
2246 /* ensure this task runs first, by using a priority level reserved for
2247 the scheduler (not really shutdown, but start-up ;-) */
2251 NULL);
2254 pr,
2256 NULL);
2259 get_timeout ());
2260 /* begin main event loop */
2264 return sh;
2265}
const struct GNUNET_DISK_FileHandle * GNUNET_DISK_pipe_handle(const struct GNUNET_DISK_PipeHandle *p, enum GNUNET_DISK_PipeEnd n)
Get the handle to a particular pipe end.
Definition: disk.c:1617
struct GNUNET_DISK_PipeHandle * GNUNET_DISK_pipe(enum GNUNET_DISK_PipeFlags pf)
Creates an interprocess channel.
Definition: disk.c:1444
@ GNUNET_DISK_PF_NONE
No special options, use non-blocking read/write operations.
@ GNUNET_DISK_PIPE_END_READ
The reading-end of a pipe.
@ GNUNET_SCHEDULER_PRIORITY_DEFAULT
Run with the default priority (normal P2P operations).
@ GNUNET_SCHEDULER_PRIORITY_SHUTDOWN
This is an internal priority level that is only used for tasks that are being triggered due to shutdo...
#define GNUNET_new(type)
Allocate a struct or union of the given type.
struct GNUNET_NETWORK_FDSet * GNUNET_NETWORK_fdset_create(void)
Creates an fd set.
Definition: network.c:1170
void GNUNET_NETWORK_fdset_handle_set(struct GNUNET_NETWORK_FDSet *fds, const struct GNUNET_DISK_FileHandle *h)
Add a file handle to the fd set.
Definition: network.c:1091
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_read_file(struct GNUNET_TIME_Relative delay, const struct GNUNET_DISK_FileHandle *rfd, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay or when the specified file descriptor is ready f...
Definition: scheduler.c:1662
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_with_priority(enum GNUNET_SCHEDULER_Priority prio, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified priority.
Definition: scheduler.c:1232
struct GNUNET_SIGNAL_Context * GNUNET_SIGNAL_handler_install(int signal, GNUNET_SIGNAL_Handler handler)
Install a signal handler that will be run if the given signal is received.
Definition: signal.c:52
#define GNUNET_TIME_UNIT_FOREVER_REL
Constant used to specify "forever".
#define GNUNET_TERM_SIG
The termination signal.
Definition: platform.h:234
static void sighandler_pipe()
Signal handler called for SIGPIPE.
Definition: scheduler.c:672
static struct GNUNET_SCHEDULER_Task * shutdown_pipe_task
Task for reading from a pipe that signal handlers will use to initiate shutdown.
Definition: scheduler.c:393
static struct GNUNET_SCHEDULER_Task * install_parent_control_task
Task for installing parent control handlers (it might happen that the scheduler is shutdown before th...
Definition: scheduler.c:387
static struct GNUNET_DISK_PipeHandle * shutdown_pipe_handle
Pipe used to communicate shutdown via signal.
Definition: scheduler.c:660
static void install_parent_control_handler(void *cls)
Definition: scheduler.c:937
static void sighandler_shutdown(void)
Signal handler called for signals that should cause us to shutdown.
Definition: scheduler.c:682
static void shutdown_pipe_cb(void *cls)
Definition: scheduler.c:946
static pid_t my_pid
Process ID of this process at the time we installed the various signal handlers.
Definition: scheduler.c:666
Handle used to access files (and pipes).
Argument to be passed from the driver to GNUNET_SCHEDULER_do_work().
Definition: scheduler.c:83

References GNUNET_SCHEDULER_Driver::cls, current_lifeness, current_priority, get_timeout(), GNUNET_assert, GNUNET_DISK_PF_NONE, GNUNET_DISK_pipe(), GNUNET_DISK_PIPE_END_READ, GNUNET_DISK_pipe_handle(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_NETWORK_fdset_create(), GNUNET_NETWORK_fdset_handle_set(), GNUNET_new, GNUNET_NO, GNUNET_SCHEDULER_add_read_file(), GNUNET_SCHEDULER_add_with_priority(), GNUNET_SCHEDULER_PRIORITY_DEFAULT, GNUNET_SCHEDULER_PRIORITY_SHUTDOWN, GNUNET_SIGNAL_handler_install(), GNUNET_TERM_SIG, GNUNET_TIME_UNIT_FOREVER_REL, GNUNET_YES, install_parent_control_handler(), install_parent_control_task, LOG, my_pid, scheduler_driver, GNUNET_SCHEDULER_Driver::set_wakeup, sh, shutdown_pipe_cb(), shutdown_pipe_handle, shutdown_pipe_task, sighandler_pipe(), and sighandler_shutdown().

Referenced by GNUNET_SCHEDULER_run().

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◆ GNUNET_SCHEDULER_driver_done()

void GNUNET_SCHEDULER_driver_done ( struct GNUNET_SCHEDULER_Handle sh)

Counter-part of GNUNET_SCHEDULER_driver_init.

Has to be called by external event loop implementations after the scheduler has shut down. This is the case if both of the following conditions are met:

  • all tasks the scheduler has added through the driver's add callback have been removed again through the driver's del callback
  • the timeout the scheduler has set through the driver's add_wakeup callback is FOREVER
Parameters
shthe handle returned by GNUNET_SCHEDULER_driver_init

Definition at line 2283 of file scheduler.c.

2284{
2285 GNUNET_break (NULL == pending_head);
2287 GNUNET_break (NULL == shutdown_head);
2288 for (int i = 0; i != GNUNET_SCHEDULER_PRIORITY_COUNT; ++i)
2289 {
2290 GNUNET_break (NULL == ready_head[i]);
2291 }
2294
2295 /* uninstall signal handlers */
2298#if (SIGTERM != GNUNET_TERM_SIG)
2300#endif
2305 shutdown_pipe_handle = NULL;
2306 scheduler_driver = NULL;
2307 GNUNET_free (sh);
2308}
enum GNUNET_GenericReturnValue GNUNET_DISK_pipe_close(struct GNUNET_DISK_PipeHandle *p)
Closes an interprocess channel.
Definition: disk.c:1587
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur.
#define GNUNET_free(ptr)
Wrapper around free.
void GNUNET_NETWORK_fdset_destroy(struct GNUNET_NETWORK_FDSet *fds)
Releases the associated memory of an fd set.
Definition: network.c:1186
void GNUNET_SIGNAL_handler_uninstall(struct GNUNET_SIGNAL_Context *ctx)
Uninstall a previously installed signal handler.
Definition: signal.c:78
static struct GNUNET_SCHEDULER_Task * shutdown_head
Head of list of tasks waiting for shutdown.
Definition: scheduler.c:334

References GNUNET_break, GNUNET_DISK_pipe_close(), GNUNET_free, GNUNET_NETWORK_fdset_destroy(), GNUNET_SCHEDULER_PRIORITY_COUNT, GNUNET_SIGNAL_handler_uninstall(), pending_head, pending_timeout_head, ready_head, scheduler_driver, sh, shutdown_head, and shutdown_pipe_handle.

Referenced by GNUNET_SCHEDULER_run().

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◆ GNUNET_SCHEDULER_driver_select()

struct GNUNET_SCHEDULER_Driver * GNUNET_SCHEDULER_driver_select ( void  )

Obtain the driver for using select() as the event loop.

Returns
NULL on error

Definition at line 2545 of file scheduler.c.

2546{
2547 struct GNUNET_SCHEDULER_Driver *select_driver;
2548
2549 select_driver = GNUNET_new (struct GNUNET_SCHEDULER_Driver);
2550
2551 select_driver->add = &select_add;
2552 select_driver->del = &select_del;
2553 select_driver->set_wakeup = &select_set_wakeup;
2554
2555 return select_driver;
2556}
static void select_set_wakeup(void *cls, struct GNUNET_TIME_Absolute dt)
Definition: scheduler.c:2529
static int select_del(void *cls, struct GNUNET_SCHEDULER_Task *task)
Definition: scheduler.c:2499
static int select_add(void *cls, struct GNUNET_SCHEDULER_Task *task, struct GNUNET_SCHEDULER_FdInfo *fdi)
Definition: scheduler.c:2468
API an external event loop has to implement for GNUNET_SCHEDULER_driver_init.
int(* add)(void *cls, struct GNUNET_SCHEDULER_Task *task, struct GNUNET_SCHEDULER_FdInfo *fdi)
Add a task to be run if the conditions specified in the et field of the given fdi are satisfied.

References GNUNET_SCHEDULER_Driver::add, GNUNET_SCHEDULER_Driver::del, GNUNET_new, select_add(), select_del(), select_set_wakeup(), and GNUNET_SCHEDULER_Driver::set_wakeup.

Referenced by GNUNET_SCHEDULER_run().

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◆ GNUNET_SCHEDULER_run()

void GNUNET_SCHEDULER_run ( GNUNET_SCHEDULER_TaskCallback  task,
void *  task_cls 
)

Initialize and run scheduler.

This function will return when all tasks have completed. On systems with signals, receiving a SIGTERM (and other similar signals) will cause GNUNET_SCHEDULER_shutdown to be run after the active task is complete. As a result, SIGTERM causes all shutdown tasks to be scheduled with reason GNUNET_SCHEDULER_REASON_SHUTDOWN. (However, tasks added afterwards will execute normally!). Note that any particular signal will only shut down one scheduler; applications should always only create a single scheduler.

Parameters
tasktask to run first (and immediately)
task_clsclosure of task

Definition at line 725 of file scheduler.c.

727{
729 struct GNUNET_SCHEDULER_Driver *driver;
730 struct DriverContext context = {
731 .scheduled_head = NULL,
732 .scheduled_tail = NULL,
733 .timeout = GNUNET_TIME_absolute_get ()
734 };
735
737 driver->cls = &context;
740 task_cls,
745 &context));
747 GNUNET_free (driver);
748}
static pa_context * context
Pulseaudio context.
void GNUNET_SCHEDULER_driver_done(struct GNUNET_SCHEDULER_Handle *sh)
Counter-part of GNUNET_SCHEDULER_driver_init.
Definition: scheduler.c:2283
void GNUNET_SCHEDULER_add_with_reason_and_priority(GNUNET_SCHEDULER_TaskCallback task, void *task_cls, enum GNUNET_SCHEDULER_Reason reason, enum GNUNET_SCHEDULER_Priority priority)
Continue the current execution with the given function.
Definition: scheduler.c:1075
struct GNUNET_SCHEDULER_Driver * GNUNET_SCHEDULER_driver_select()
Obtain the driver for using select() as the event loop.
Definition: scheduler.c:2545
struct GNUNET_SCHEDULER_Handle * GNUNET_SCHEDULER_driver_init(const struct GNUNET_SCHEDULER_Driver *driver)
Function called by external event loop implementations to initialize the scheduler.
Definition: scheduler.c:2208
static enum GNUNET_GenericReturnValue select_loop(struct GNUNET_SCHEDULER_Handle *sh, struct DriverContext *context)
Definition: scheduler.c:2312
Driver context used by GNUNET_SCHEDULER_run.
Definition: scheduler.c:291

References GNUNET_SCHEDULER_Driver::cls, context, GNUNET_break, GNUNET_free, GNUNET_OK, GNUNET_SCHEDULER_add_with_reason_and_priority(), GNUNET_SCHEDULER_driver_done(), GNUNET_SCHEDULER_driver_init(), GNUNET_SCHEDULER_driver_select(), GNUNET_SCHEDULER_PRIORITY_DEFAULT, GNUNET_SCHEDULER_REASON_STARTUP, GNUNET_TIME_absolute_get(), select_loop(), and sh.

Referenced by GNUNET_PROGRAM_run2(), GNUNET_SERVICE_main(), GNUNET_SERVICE_run_(), GNUNET_TESTING_main(), and main().

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◆ GNUNET_SCHEDULER_run_with_optional_signals()

void GNUNET_SCHEDULER_run_with_optional_signals ( int  install_signals,
GNUNET_SCHEDULER_TaskCallback  task,
void *  task_cls 
)

Initialize and run scheduler.

This function will return when all tasks have completed. When @ install_signals is GNUNET_YES, then this function behaves in the same was as GNUNET_SCHEDULER_run does. If @ install_signals is GNUNET_NO then no signal handlers are installed.

Parameters
install_signalswhether to install signals (GNUNET_YES/NO)
tasktask to run first (and immediately)
task_clsclosure of task

◆ GNUNET_SCHEDULER_shutdown()

void GNUNET_SCHEDULER_shutdown ( void  )

Request the shutdown of a scheduler.

Marks all tasks awaiting shutdown as ready. Note that tasks scheduled with GNUNET_SCHEDULER_add_shutdown() AFTER this call will be delayed until the next shutdown signal.

Definition at line 567 of file scheduler.c.

568{
569 struct GNUNET_SCHEDULER_Task *pos;
570
572 "GNUNET_SCHEDULER_shutdown\n");
573 if (NULL != install_parent_control_task)
574 {
577 }
578 if (NULL != shutdown_pipe_task)
579 {
581 shutdown_pipe_task = NULL;
582 }
583 while (NULL != (pos = shutdown_head))
584 {
587 pos);
589 queue_ready_task (pos);
590 }
591}
void * GNUNET_SCHEDULER_cancel(struct GNUNET_SCHEDULER_Task *task)
Cancel the task with the specified identifier.
Definition: scheduler.c:981
static struct GNUNET_SCHEDULER_Task * shutdown_tail
Tail of list of tasks waiting for shutdown.
Definition: scheduler.c:339

References GNUNET_CONTAINER_DLL_remove, GNUNET_ERROR_TYPE_DEBUG, GNUNET_SCHEDULER_cancel(), GNUNET_SCHEDULER_REASON_SHUTDOWN, install_parent_control_task, LOG, queue_ready_task(), GNUNET_SCHEDULER_Task::reason, shutdown_head, shutdown_pipe_task, and shutdown_tail.

Referenced by action_loop(), add_continuation(), allocation_cb(), bandwidth_stats_cont(), calculate_pow(), channel_ended(), cleanup(), conn_status(), connect_check_run(), core_init(), delay_shutdown(), dht_connected(), directory_scan_cb(), directory_trim_complete(), do_get(), do_quit(), do_send(), do_shutdown(), do_timeout(), ego_callback(), error_cb(), find_proof(), finish_command(), GCD_init(), get_cb(), get_ego(), handle_block(), handle_collect_result(), handle_data(), handle_estimate(), handle_helper_barrier_crossable(), handle_helper_init(), handle_result(), handle_revocation_union_request(), handle_stop(), handle_verify_result(), hello_done_cb(), hello_result_cb(), identity_cb(), identity_continuation(), init_callback(), init_socket(), list_callback(), main_init(), monitor_cb(), nat_register(), on_identity(), operation_timeout(), origin_create_cb(), parse(), path_callback(), peer_init_handler(), peers_callback(), print_finish(), print_indexed(), print_query_result(), print_revocation_result(), process_command_stdin(), process_lookup_result(), process_peer_string(), process_queue(), progress_cb(), put_cb(), read_stdio(), read_task(), reannounce_regex(), reply_handle(), requester_callback(), responder_callback(), run(), service_connect_comp(), show_peer(), shutdown_if_no_lifeness(), shutdown_pipe_cb(), shutdown_task(), sign_cb(), start_callback(), start_dump(), start_insert(), stats_cb(), stop_callback(), store_cb(), stun_read_task(), switch_to_speaker(), term_callback(), test_finished(), test_run(), timeout_task(), timeout_task_cb(), trigger_shutdown(), tunnels_callback(), uri_ksk_continuation(), uri_sks_continuation(), view_update_handle(), wait_child(), write_task(), and zone_iteration_error().

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◆ GNUNET_SCHEDULER_get_load()

unsigned int GNUNET_SCHEDULER_get_load ( enum GNUNET_SCHEDULER_Priority  p)

Get information about the current load of this scheduler.

Use this function to determine if an elective task should be added or simply dropped (if the decision should be made based on the number of tasks ready to run).

Parameters
ppriority-level to query, use KEEP to query the level of the current task, use COUNT to get the sum over all priority levels
Returns
number of tasks pending right now

Use this function to determine if an elective task should be added or simply dropped (if the decision should be made based on the number of tasks ready to run).

Parameters
ppriority level to look at
Returns
number of tasks pending right now

Definition at line 775 of file scheduler.c.

776{
777 unsigned int ret;
778
779 GNUNET_assert (NULL != active_task);
781 return ready_count;
784 ret = 0;
785 for (struct GNUNET_SCHEDULER_Task *pos = ready_head[check_priority (p)];
786 NULL != pos;
787 pos = pos->next)
788 ret++;
790 // Don't count the dummy marker
791 ret--;
792 return ret;
793}
static int ret
Final status code.
Definition: gnunet-arm.c:94
static struct GNUNET_OS_Process * p
Helper process we started.
Definition: gnunet-uri.c:38
static enum GNUNET_SCHEDULER_Priority check_priority(enum GNUNET_SCHEDULER_Priority p)
Check that the given priority is legal (and return it).
Definition: scheduler.c:462

References active_task, check_priority(), current_priority, GNUNET_assert, GNUNET_SCHEDULER_PRIORITY_COUNT, GNUNET_SCHEDULER_PRIORITY_KEEP, GNUNET_SCHEDULER_Task::in_ready_list, GNUNET_SCHEDULER_Task::next, p, pass_end_marker, GNUNET_SCHEDULER_Task::priority, ready_count, ready_head, and ret.

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◆ GNUNET_SCHEDULER_get_task_context()

const struct GNUNET_SCHEDULER_TaskContext * GNUNET_SCHEDULER_get_task_context ( void  )

Obtain the reasoning why the current task was started.

Returns
task context with information why the current task is run

Obtain the reasoning why the current task was started.

Returns
current tasks' scheduler context

Definition at line 758 of file scheduler.c.

759{
760 GNUNET_assert (NULL != active_task);
761 return &tc;
762}

References active_task, GNUNET_assert, and tc.

Referenced by cmd_read(), connect_probe_continuation(), do_read(), do_s5r_read(), do_udp_read(), maint_child_death(), read_dns4(), read_dns6(), read_response(), and tcp_send().

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◆ GNUNET_SCHEDULER_cancel()

void * GNUNET_SCHEDULER_cancel ( struct GNUNET_SCHEDULER_Task task)

Cancel the task with the specified identifier.

The task must not yet have run. Only allowed to be called as long as the scheduler is running, that is one of the following conditions is met:

Parameters
taskid of the task to cancel
Returns
original closure of the task

Definition at line 981 of file scheduler.c.

982{
984 int is_fd_task;
985 void *ret;
986
988 "canceling task %p\n",
989 task);
990
991 /* scheduler must be running */
993 is_fd_task = (NULL != task->fds);
994 if (is_fd_task)
995 {
996 int del_result = scheduler_driver->del (scheduler_driver->cls, task);
997 if (GNUNET_OK != del_result)
998 {
1000 "driver could not delete task\n");
1001 GNUNET_assert (0);
1002 }
1003 }
1004 if (! task->in_ready_list)
1005 {
1006 if (is_fd_task)
1007 {
1010 task);
1011 }
1012 else if (GNUNET_YES == task->on_shutdown)
1013 {
1016 task);
1017 }
1018 else
1019 {
1022 task);
1023 if (pending_timeout_last == task)
1024 pending_timeout_last = NULL;
1025 }
1026 }
1027 else
1028 {
1029 p = check_priority (task->priority);
1031 ready_tail[p],
1032 task);
1033 ready_count--;
1034 }
1035 ret = task->callback_cls;
1036 destroy_task (task);
1037 return ret;
1038}
GNUNET_SCHEDULER_Priority
Valid task priorities.
int on_shutdown
Is this task run on shutdown?
Definition: scheduler.c:225

References GNUNET_SCHEDULER_Task::callback_cls, check_priority(), GNUNET_SCHEDULER_Driver::cls, GNUNET_SCHEDULER_Driver::del, destroy_task(), GNUNET_SCHEDULER_Task::fds, GNUNET_assert, GNUNET_CONTAINER_DLL_remove, GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_OK, GNUNET_YES, GNUNET_SCHEDULER_Task::in_ready_list, LOG, GNUNET_SCHEDULER_Task::on_shutdown, p, pending_head, pending_tail, pending_timeout_head, pending_timeout_last, pending_timeout_tail, GNUNET_SCHEDULER_Task::priority, ready_count, ready_head, ready_tail, ret, scheduler_driver, shutdown_head, and shutdown_tail.

Referenced by abort_all_requests(), announce_next_regex(), backtalker_monotime_store_cb(), bi_destroy(), cadet_mq_cancel_impl(), calculate_pow_shutdown(), call_continuation(), cancel_aps(), channel_destroy(), check_autoconfig_finished(), check_completed(), check_disconnect(), child_management_done(), clean_request(), cleaning_task(), cleanup(), cleanup_cth(), cleanup_finish(), cleanup_handle(), cleanup_rs(), cleanup_s5r(), cleanup_task(), client_disconnect_cb(), close_srv_handle_room(), connection_client_cancel_impl(), connection_client_destroy_impl(), connection_ready_cb(), consider_peer_activate(), consider_peer_destroy(), consider_sending_fc(), consume_ticket(), continuation_print(), continue_store_activity(), cummulative_ack(), curl_download_prepare(), curl_task_download(), data_sent_cb(), destroy_channel(), destroy_handle(), destroy_iterator_cb(), destroy_message_control(), destroy_operation(), destroy_peer(), destroy_room(), destroy_service(), destroy_srv_handle(), destroy_srv_room(), destroy_sub(), destroy_subscription(), destroy_tunnel(), DHTU_ip_done(), disconnect_cb(), disconnect_notify(), dns_result_parser(), dns_result_processor(), do_cleanup(), do_error(), do_s5r_read(), do_shutdown(), do_stop_task(), do_suspend(), done_finish(), exp_cb(), finish_test(), free_ack_cummulator_cb(), free_active_lookup(), free_address_list_entry(), free_backtalker(), free_dv_route(), free_neighbour(), free_peer(), free_pending_request(), free_proto_queue(), free_qe(), free_queue(), free_queue_entry(), free_validation_state(), free_virtual_link(), GCC_destroy(), GCC_handle_connection_create_ack(), GCC_handle_duplicate_create(), GCC_transmit(), GCCH_bind(), GCCH_channel_local_destroy(), GCCH_handle_channel_open_ack(), GCCH_handle_channel_plaintext_data_ack(), GCCH_handle_local_data(), GCD_hello_update(), GCD_shutdown(), GCO_shutdown(), GCP_add_connection(), GCT_add_channel(), GCT_change_estate(), GCT_destroy_tunnel_now(), GCT_handle_encrypted(), GCT_handle_kx(), GCT_send(), GDS_CLIENTS_stop(), GDS_u_disconnect(), get_cadet(), get_iter(), get_lt_delete_it(), get_request_socket(), GN_nat_status_changed(), GN_stop_gnunet_nat_server_(), GNS_resolver_lookup_cancel(), GNUNET_ABD_disconnect(), GNUNET_ARM_disconnect(), GNUNET_ARM_monitor_stop(), GNUNET_ARM_operation_cancel(), GNUNET_BANDWIDTH_tracker_notification_stop(), GNUNET_CADET_disconnect(), GNUNET_CADET_get_channel_cancel(), GNUNET_CADET_get_path_cancel(), GNUNET_CADET_list_peers_cancel(), GNUNET_CADET_list_tunnels_cancel(), GNUNET_CORE_disconnect(), GNUNET_CRYPTO_hash_file_cancel(), GNUNET_CURL_gnunet_rc_destroy(), GNUNET_CURL_gnunet_scheduler_reschedule(), GNUNET_DATASTORE_disconnect(), GNUNET_DHT_disconnect(), GNUNET_DNS_disconnect(), GNUNET_DNSSTUB_resolve_cancel(), GNUNET_FS_dequeue_(), GNUNET_FS_directory_scan_abort(), GNUNET_FS_download_signal_suspend_(), GNUNET_FS_download_stop(), GNUNET_FS_publish_ksk_cancel(), GNUNET_FS_publish_signal_suspend_(), GNUNET_FS_publish_stop(), GNUNET_FS_publish_ublock_cancel_(), GNUNET_FS_queue_(), GNUNET_FS_search_pause(), GNUNET_FS_search_probe_progress_(), GNUNET_FS_search_signal_suspend_(), GNUNET_FS_search_start_searching_(), GNUNET_FS_search_stop(), GNUNET_FS_search_stop_probe_(), GNUNET_FS_stop(), GNUNET_FS_stop_probe_ping_task_(), GNUNET_GNS_disconnect(), GNUNET_HELPER_destroy(), GNUNET_HELPER_kill(), GNUNET_HELPER_send_cancel(), GNUNET_HELPER_wait(), GNUNET_HOSTLIST_client_stop(), GNUNET_HOSTLIST_server_stop(), GNUNET_IDENTITY_disconnect(), GNUNET_MQ_destroy(), GNUNET_NAMECACHE_disconnect(), GNUNET_NAMESTORE_disconnect(), GNUNET_NAT_AUTO_test_start(), GNUNET_NAT_AUTO_test_stop(), GNUNET_NAT_autoconfig_cancel(), GNUNET_NAT_mini_get_external_ipv4_cancel_(), GNUNET_NAT_mini_map_stop(), GNUNET_NAT_test_start(), GNUNET_NAT_test_stop(), GNUNET_NAT_unregister(), GNUNET_NSE_disconnect(), GNUNET_NT_scanner_done(), GNUNET_OS_command_stop(), GNUNET_PQ_event_listen_cancel(), GNUNET_RECLAIM_disconnect(), GNUNET_RESOLVER_disconnect(), GNUNET_RESOLVER_hostname_get(), GNUNET_RESOLVER_ip_get(), GNUNET_RESOLVER_request_cancel(), GNUNET_SCHEDULER_shutdown(), GNUNET_SERVICE_client_continue(), GNUNET_SERVICE_client_disable_continue_warning(), GNUNET_SERVICE_client_drop(), GNUNET_SERVICE_stop(), GNUNET_SET_listen_cancel(), GNUNET_SETI_listen_cancel(), GNUNET_SETU_listen_cancel(), GNUNET_SPEEDUP_stop_(), GNUNET_STATISTICS_destroy(), GNUNET_TESTING_interpreter_fail(), GNUNET_TRANSPORT_application_done(), GNUNET_TRANSPORT_TESTING_connect_peers_cancel(), GNUNET_TRANSPORT_TESTING_stop_peer(), GNUNET_VPN_disconnect(), GSC_KX_done(), GSC_SESSIONS_confirm_typemap(), GSC_SESSIONS_end(), GSF_cadet_release_clients(), GSF_connected_peer_done_(), GSF_peer_disconnect_handler(), GSF_pending_request_cancel_(), GSF_plan_notify_peer_disconnect_(), GSF_push_done_(), GSF_put_done_(), handle_announce(), handle_core_disconnect(), handle_dht_local_get(), handle_disconnect_confirm(), handle_discourse_subscription(), handle_dns_response(), handle_encrypted(), handle_external_ip(), handle_flow_control(), handle_helper_local_finished(), handle_incoming_msg(), handle_monitor_next(), handle_p2p_estimate(), handle_ping(), handle_plaintext_channel_open(), handle_pong(), handle_stream_input(), handle_stun(), handle_transport_notify_disconnect(), incoming_destroy(), insert_sorted(), iterate_destroy_subscription(), kill_httpd(), maint_child_death(), manage_first_hop_mq(), mhd_log_callback(), monitor_unblock(), mq_cancel(), mq_error_handler(), netjail_exec_cleanup(), notify_connect(), numeric_reverse(), on_identity(), parent_control_handler(), pending_reversals_delete_it(), primary_task(), process_job_queue(), process_local_reply(), process_peer_iteration_cb(), process_peer_monitoring_cb(), process_peer_string(), process_queue(), process_stat_done(), queue_destroy(), reconnect_later(), reconstruct_cont(), refresh_timeout_task(), regex_found_handler(), remove_channel_ctx(), remove_stream_request(), reschedule_hellos(), reset_cadet_async(), reset_handles(), RPS_sampler_request_cancel(), RPS_sampler_request_single_info_cancel(), run(), run_mhd_now(), schedule_current_round(), schedule_httpd(), schedule_read(), schedule_transmit_on_queue(), scheduler_fd_cb(), search_result_freeze_probes(), secret_destroy(), select_read_cb(), send_key(), send_response(), service_mq_cancel(), shutdown_hook(), shutdown_pch(), shutdown_task(), start_process(), start_typemap_task(), stop_helper(), stop_operation(), stop_peer_run(), stop_stun(), switch_to_speaker(), teardown_service(), terminate_ac_activities(), terminate_task(), test_master(), test_nat_punched(), try_transmission(), u_address_add(), u_address_del(), update_backtalker_monotime(), update_excess(), update_flood_times(), update_next_challenge_time(), update_subscription_timing(), update_timeout(), validation_transmit_on_queue(), and zone_iteration_error().

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◆ GNUNET_SCHEDULER_add_with_reason_and_priority()

void GNUNET_SCHEDULER_add_with_reason_and_priority ( GNUNET_SCHEDULER_TaskCallback  task,
void *  task_cls,
enum GNUNET_SCHEDULER_Reason  reason,
enum GNUNET_SCHEDULER_Priority  priority 
)

Continue the current execution with the given function.

This is similar to the other "add" functions except that there is no delay and the reason code can be specified.

Parameters
taskmain function of the task
task_clsclosure for task
reasonreason for task invocation
prioritypriority to use for the task

Definition at line 1075 of file scheduler.c.

1082{
1083 struct GNUNET_SCHEDULER_Task *t;
1084
1085 /* scheduler must be running */
1087 GNUNET_assert (NULL != task);
1089 t->read_fd = -1;
1090 t->write_fd = -1;
1091 t->callback = task;
1092 t->callback_cls = task_cls;
1093#if PROFILE_DELAYS
1094 t->start_time = GNUNET_TIME_absolute_get ();
1095#endif
1096 t->reason = reason;
1100 "Adding continuation task %p\n",
1101 t);
1102 init_backtrace (t);
1104}
static struct GNUNET_SCHEDULER_Task * t
Main task.
static void init_backtrace(struct GNUNET_SCHEDULER_Task *t)
Initialize backtrace data for task t.
Definition: scheduler.c:1047
int write_fd
Set if we only wait for writing to a single FD, otherwise -1.
Definition: scheduler.c:214
int read_fd
Set if we only wait for reading from a single FD, otherwise -1.
Definition: scheduler.c:209

References GNUNET_SCHEDULER_Task::callback, GNUNET_SCHEDULER_Task::callback_cls, check_priority(), current_lifeness, GNUNET_assert, GNUNET_ERROR_TYPE_DEBUG, GNUNET_new, GNUNET_TIME_absolute_get(), init_backtrace(), GNUNET_SCHEDULER_Task::lifeness, LOG, GNUNET_SCHEDULER_Task::priority, queue_ready_task(), GNUNET_SCHEDULER_Task::read_fd, GNUNET_SCHEDULER_Task::reason, scheduler_driver, t, and GNUNET_SCHEDULER_Task::write_fd.

Referenced by GNUNET_SCHEDULER_run().

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◆ GNUNET_SCHEDULER_add_with_priority()

struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_with_priority ( enum GNUNET_SCHEDULER_Priority  prio,
GNUNET_SCHEDULER_TaskCallback  task,
void *  task_cls 
)

Schedule a new task to be run with a specified priority.

Parameters
priohow important is the new task?
taskmain function of the task
task_clsclosure of task
Returns
unique task identifier for the job only valid until task is started!

Definition at line 1232 of file scheduler.c.

1235{
1237 prio,
1238 task,
1239 task_cls);
1240}
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_delayed_with_priority(struct GNUNET_TIME_Relative delay, enum GNUNET_SCHEDULER_Priority priority, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay.
Definition: scheduler.c:1208
#define GNUNET_TIME_UNIT_ZERO
Relative time zero.

References GNUNET_SCHEDULER_add_delayed_with_priority(), and GNUNET_TIME_UNIT_ZERO.

Referenced by begin_service(), block_proc(), create_srv_room(), dequeue_message_from_room(), deserialize_publish_file(), ds_put_cont(), encode_cont(), file_hash_task(), finish_reserve(), GNUNET_CRYPTO_hash_file(), GNUNET_FS_publish_start(), GNUNET_SCHEDULER_driver_init(), GSF_connected_peer_init_(), maint_child_death(), on_message(), publish_kblocks_cont(), and run().

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◆ GNUNET_SCHEDULER_add_now()

struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_now ( GNUNET_SCHEDULER_TaskCallback  task,
void *  task_cls 
)

Schedule a new task to be run as soon as possible.

Note that this does not guarantee that this will be the next task that is being run, as other tasks with higher priority (or that are already ready to run) might get to run first. Just as with delays, clients must not rely on any particular order of execution between tasks scheduled concurrently.

The task will be run with the DEFAULT priority.

Parameters
taskmain function of the task
task_clsclosure of task
Returns
unique task identifier for the job only valid until task is started!

Definition at line 1305 of file scheduler.c.

1307{
1308 struct GNUNET_SCHEDULER_Task *t;
1309
1312 t->callback = task;
1313 t->callback_cls = task_cls;
1314 t->read_fd = -1;
1315 t->write_fd = -1;
1316#if PROFILE_DELAYS
1317 t->start_time = GNUNET_TIME_absolute_get ();
1318#endif
1324 init_backtrace (t);
1325 return t;
1326}
#define GNUNET_TIME_UNIT_ZERO_ABS
Absolute time zero.

References GNUNET_SCHEDULER_Task::callback, GNUNET_SCHEDULER_Task::callback_cls, current_lifeness, current_priority, GNUNET_async_scope_get(), GNUNET_new, GNUNET_TIME_absolute_get(), GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_YES, init_backtrace(), GNUNET_SCHEDULER_Task::lifeness, GNUNET_SCHEDULER_Task::on_shutdown, GNUNET_SCHEDULER_Task::priority, queue_ready_task(), GNUNET_SCHEDULER_Task::read_fd, GNUNET_SCHEDULER_Task::scope, t, GNUNET_SCHEDULER_Task::timeout, and GNUNET_SCHEDULER_Task::write_fd.

Referenced by add_attribute_cont(), add_continuation(), add_credential_cont(), advertise_dns_exit(), announce_regex(), attr_delete_cont(), attr_store_cont(), authorize_endpoint(), backchannel_check_run(), build_authz_response(), build_redirect(), bulk_tx_start(), cadet_mq_send_impl(), check_autoconfig_finished(), client_response_handler(), code_redirect(), collect_error_cb(), collect_finished_cb(), connect_cb(), connection_client_send_impl(), consistency_iter_fin(), consume_cont(), consume_fail(), consume_ticket_cont(), continuation_print(), continue_with_gns2dns(), cr_cont(), create_address_entry(), create_did(), create_did_cb(), create_did_ego_create_cb(), create_did_ego_lockup_cb(), create_download_context(), create_finished(), cred_delete_cont(), cred_error(), cred_iter_finished(), cred_store_cont(), decrypt_box(), del_attr_finished(), del_finished(), delete_attribute_cont(), delete_credential_cont(), delete_finished_cb(), deserialize_download(), DHTU_ip_init(), disconnect_notify(), dns_result_parser(), do_abort(), do_announce(), do_error(), do_finished(), ego_callback(), ego_create(), ego_delete_name(), ego_delete_pubkey(), ego_edit(), ego_edit_name(), ego_edit_pubkey(), ego_get_all(), ego_get_name(), ego_get_pubkey(), ego_get_response(), ego_sign_data(), ego_sign_data_cb(), fail_resolution(), find_timed_out(), finished_cont(), free_dv_route(), free_neighbour(), gather_dht_put_blocks(), GCCH_bind(), GCCH_channel_local_destroy(), GCCH_handle_duplicate_open(), GCCH_tunnel_up(), GCP_attach_path(), GCT_change_estate(), GCT_create_tunnel(), GCT_handle_encrypted(), GCT_handle_kx(), GCT_send(), GDS_u_connect(), get_cont(), get_gns_cont(), get_oidc_dir_path(), GN_nat_status_changed(), GNS_resolver_lookup(), GNS_resolver_lookup_cancel(), GNUNET_ARM_request_service_start(), GNUNET_CLIENT_connect(), GNUNET_CURL_gnunet_scheduler_reschedule(), GNUNET_DNS_connect(), GNUNET_DNSSTUB_resolve(), GNUNET_FS_dequeue_(), GNUNET_FS_download_start_task_(), GNUNET_FS_publish_ksk(), GNUNET_FS_publish_ublock_(), GNUNET_FS_queue_(), GNUNET_FS_search_probe_progress_(), GNUNET_HOSTLIST_client_start(), GNUNET_MQ_impl_send_continue(), GNUNET_NAT_AUTO_test_start(), GNUNET_NAT_mini_get_external_ipv4_(), GNUNET_NAT_test_start(), GNUNET_RESOLVER_hostname_get(), GNUNET_RESOLVER_ip_get(), GNUNET_SCHEDULER_add_now_with_lifeness(), GNUNET_SERVICE_client_continue(), GNUNET_SERVICE_client_drop(), GNUNET_TESTING_interpreter_fail(), GNUNET_TESTING_interpreter_next_(), GNUNET_TRANSPORT_TESTING_start_peer(), GSF_plan_add_(), GSF_put_init_(), handle_add_queue_message(), handle_attribute_store_message(), handle_credential_store_message(), handle_dht_local_get(), handle_disconnect_confirm(), handle_gns_redirect_result(), handle_gns_resolution_result(), handle_gns_response(), handle_local_ack(), handle_monitor_next(), handle_monitor_start(), handle_p2p_estimate(), handle_p2p_reply(), handle_stop(), handle_stream_input(), handler_advertisement(), hello_iter_cb(), identity_cb(), idle(), iface_proc(), import_next_cb(), init_callback(), iter_error(), iter_finished(), iterate_message_control(), kb_put_cont(), launch_registered_services(), list_attribute_cont(), list_callback(), list_credential_cont(), list_tickets_cont(), login_redirect(), lookup_hole_external(), lookup_redirect_uri_result(), main_task(), marked_deleted(), message_sent_cont(), monitor_iterate_cb(), mq_init(), namestore_add_or_update(), namestore_delete(), namestore_get(), namestore_import(), namestore_iteration_error(), namestore_list_finished(), new_sub(), notification_pipe_cb(), notify_srv_handle_member_id(), ns_get_lookup_cb(), ns_lookup_cb(), ns_lookup_error_cb(), offending_attr_delete_cont(), oidc_attr_collect_finished_cb(), oidc_iteration_error(), oidc_ticket_issue_cb(), options_cont(), origin_create_cb(), origin_lookup_cb(), post_ego_iteration(), primary_task(), print_did_document(), process_attrs(), process_delete(), process_dht_put_content(), process_dids(), process_helper_msgs(), process_result(), process_rvk(), process_stdin(), progress_cb(), purge_attributes(), put_cont(), queue_read_kx(), read_stdio(), reconnect_later(), reconstruct_cb(), recursive_dns_resolution(), recursive_gns2dns_resolution(), recursive_pkey_resolution(), regex_found_handler(), remove_did_document(), remove_did_document_namestore_cb(), replace_did_document(), reschedule_hellos(), reset_cadet_async(), resolve_did(), revoke_ticket_cont(), RPS_sampler_get_n_rand_peers(), RPS_sampler_get_rand_peer_info(), run(), run_mhd_now(), rvk_move_attr_cb(), rvk_ticket_update_finished(), schedule_channel_destruction(), schedule_next_task(), search_timed_out(), send_simple_single(), service_mq_send(), set_cont(), setup_is(), setup_sender(), sock_read(), start_callback(), start_peer_run(), start_probe_ping_task(), start_process(), start_resolver_lookup(), stat_timeout_task(), stop_callback(), store_completed_cb(), store_cont(), task_check(), term_callback(), test_icmp_server(), test_master(), ticket_issue_cb(), ticket_iter_err(), ticket_iter_fin(), ticket_processed(), ticket_updated(), timeout_task(), token_endpoint(), u_address_add(), u_address_del(), userinfo_endpoint(), zone_iteration_error(), and zone_iteration_finished().

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◆ GNUNET_SCHEDULER_add_shutdown()

struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_shutdown ( GNUNET_SCHEDULER_TaskCallback  task,
void *  task_cls 
)

Schedule a new task to be run on shutdown, that is when a CTRL-C signal is received, or when GNUNET_SCHEDULER_shutdown() is being invoked.

Parameters
taskmain function of the task
task_clsclosure of task
Returns
unique task identifier for the job only valid until task is started!

Definition at line 1340 of file scheduler.c.

1342{
1343 struct GNUNET_SCHEDULER_Task *t;
1344
1345 /* scheduler must be running */
1347 GNUNET_assert (NULL != task);
1350 t->callback = task;
1351 t->callback_cls = task_cls;
1352 t->read_fd = -1;
1353 t->write_fd = -1;
1354#if PROFILE_DELAYS
1355 t->start_time = GNUNET_TIME_absolute_get ();
1356#endif
1360 t->lifeness = GNUNET_NO;
1363 t);
1365 "Adding shutdown task %p\n",
1366 t);
1367 init_backtrace (t);
1368 return t;
1369}
#define GNUNET_CONTAINER_DLL_insert(head, tail, element)
Insert an element at the head of a DLL.
#define GNUNET_TIME_UNIT_FOREVER_ABS
Constant used to specify "forever".

References GNUNET_SCHEDULER_Task::callback, GNUNET_SCHEDULER_Task::callback_cls, GNUNET_assert, GNUNET_async_scope_get(), GNUNET_CONTAINER_DLL_insert, GNUNET_ERROR_TYPE_DEBUG, GNUNET_new, GNUNET_NO, GNUNET_SCHEDULER_PRIORITY_SHUTDOWN, GNUNET_TIME_absolute_get(), GNUNET_TIME_UNIT_FOREVER_ABS, GNUNET_YES, init_backtrace(), GNUNET_SCHEDULER_Task::lifeness, LOG, GNUNET_SCHEDULER_Task::on_shutdown, GNUNET_SCHEDULER_Task::priority, GNUNET_SCHEDULER_Task::read_fd, scheduler_driver, GNUNET_SCHEDULER_Task::scope, shutdown_head, shutdown_tail, t, GNUNET_SCHEDULER_Task::timeout, and GNUNET_SCHEDULER_Task::write_fd.

Referenced by connect_check_run(), create_service(), ego_callback(), GNUNET_OS_install_parent_control_handler(), init_cb(), launch_registered_services(), loop_run(), main_init(), main_task(), on_identity(), program_main(), run(), service_main(), and test_master().

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◆ GNUNET_SCHEDULER_add_now_with_lifeness()

struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_now_with_lifeness ( int  lifeness,
GNUNET_SCHEDULER_TaskCallback  task,
void *  task_cls 
)

Schedule a new task to be run as soon as possible with the (transitive) ignore-shutdown flag either explicitly set or explicitly enabled.

This task (and all tasks created from it, other than by another call to this function) will either count or not count for the 'lifeness' of the process. This API is only useful in a few special cases.

Parameters
lifenessGNUNET_YES if the task counts for lifeness, GNUNET_NO if not.
taskmain function of the task
task_clsclosure of task
Returns
unique task identifier for the job only valid until task is started!

Definition at line 1373 of file scheduler.c.

1376{
1377 struct GNUNET_SCHEDULER_Task *ret;
1378
1379 ret = GNUNET_SCHEDULER_add_now (task, task_cls);
1380 ret->lifeness = lifeness;
1381 return ret;
1382}
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_now(GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run as soon as possible.
Definition: scheduler.c:1305

References GNUNET_SCHEDULER_add_now(), GNUNET_SCHEDULER_Task::lifeness, and ret.

Referenced by GNUNET_SPEEDUP_start_().

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◆ GNUNET_SCHEDULER_add_delayed()

struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_delayed ( struct GNUNET_TIME_Relative  delay,
GNUNET_SCHEDULER_TaskCallback  task,
void *  task_cls 
)

Schedule a new task to be run with a specified delay.

The task will be scheduled for execution once the delay has expired. It will be run with the DEFAULT priority.

Parameters
delaywith which the operation should be run
taskmain function of the task
task_clsclosure of task
Returns
unique task identifier for the job only valid until task is started!

The task will be scheduled for execution once the delay has expired. It will be run with the DEFAULT priority.

Parameters
delaywhen should this operation time out?
taskmain function of the task
task_clsclosure of task
Returns
unique task identifier for the job only valid until task is started!

Definition at line 1278 of file scheduler.c.

1281{
1284 task,
1285 task_cls);
1286}

References GNUNET_SCHEDULER_add_delayed_with_priority(), and GNUNET_SCHEDULER_PRIORITY_DEFAULT.

Referenced by age_cover_counters(), announce_id(), announce_next_regex(), broadcast_hello(), calculate_pow(), callback_mq_error(), channel_new_cb(), channel_open_sent_cb(), check_disconnect(), check_timeouts(), check_zone_namestore_next(), cleanup_expired_records(), client_connect_cb(), connect_check_run(), connect_fail_continuation(), connection_ready_cb(), consider_gathering(), consider_peer_destroy(), consider_sending_fc(), continue_store_activity(), core_init(), curl_download_prepare(), daemon_started(), delay_warning(), delayed_get(), dht_connected(), disconnect_and_schedule_reconnect(), dns_pre_request_handler(), do_broadcast(), do_dht_put(), do_disconnect(), do_refresh(), do_rekey(), do_round(), do_scheduler_notify(), do_speedup(), error_handler(), expire_records_continuation(), find_string(), force_reconnect(), GCC_handle_connection_create_ack(), GCCH_channel_incoming_new(), GCD_hello_update(), GCD_init(), GCT_remove_channel(), get_addresses(), get_cadet(), GNUNET_FS_search_probe_progress_(), GNUNET_HOSTLIST_client_start(), GNUNET_HOSTLIST_server_start(), GNUNET_NAMESTORE_records_store(), GNUNET_NAT_mini_map_start(), GNUNET_NAT_test_start(), GNUNET_NT_scanner_init(), GNUNET_PQ_event_listen(), GNUNET_RESOLVER_hostname_get(), GNUNET_RESOLVER_ip_get(), GNUNET_STATISTICS_destroy(), GNUNET_TESTING_run(), GSC_KX_init(), GSF_cadet_query_cancel(), handle_announce(), handle_autoconfig_request(), handle_client_listener_error(), handle_connection_create(), handle_core_connect(), handle_data(), handle_external_ip(), handle_fragment_box(), handle_monitor_next(), handle_mq_error(), handle_p2p_migration_stop(), handle_p2p_reply(), handle_ping(), handle_request(), handle_stun(), handle_transport_notify_connect(), handler_advertisement(), helper_read(), helper_write(), ifc_broadcast(), iter_finished(), kce_generate_cb(), keepalive_done(), learn_dv_path(), lookup_authz_cb(), main_init(), maintain_connections_cb(), manage_first_hop_mq(), monitor_unblock(), mq_error_handler(), mq_init(), netjail_exec_run(), odc_warn_delay_task(), peerstore_store_own_cb(), probe_ping_task_cb(), process_external_ip(), process_job_queue(), process_local_reply(), process_map_output(), process_peer_iteration_cb(), process_peer_monitoring_cb(), process_queue(), process_requests(), queue_send_msg(), queue_timeout(), read_from_log(), reannounce(), reannounce_regex(), reconnect(), reconnect_arm_later(), reconnect_arm_monitor_later(), reconnect_later(), recursive_dns_resolution(), refresh_timeout_task(), reschedule_connect(), resolve_and_cache(), REST_gns_process_request(), rest_identity_process_request(), REST_identity_process_request(), REST_namestore_process_request(), REST_openid_process_request(), REST_reclaim_process_request(), revive_migration(), run(), run_external_ip(), run_finish(), run_scan(), scan(), schedule_current_round(), schedule_httpd(), schedule_next_hello(), schedule_next_put(), schedule_next_task(), send_create_ack(), send_find_peer_message(), send_keep_alive(), send_keepalive(), send_key(), service_client_mst_cb(), setup_data_transfer(), setup_queue(), shc_cont(), start_cb(), start_dv_learn(), start_helper(), start_local_query(), start_typemap_task(), switch_to_speaker(), task_check(), task_download_dispatcher(), task_hostlist_saving(), test_master(), transmit_cummulative_ack_cb(), transmit_query(), transmit_task_cb(), transmit_typemap_task(), try_again(), try_reconnect(), update_excess(), update_flood_message(), update_flood_times(), update_subscription_timing(), update_timeout(), userinfo_endpoint(), warn_delay_task(), warn_monitor_slow(), warn_no_client_continue(), work(), and zone_iteration_finished().

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◆ GNUNET_SCHEDULER_add_at()

struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_at ( struct GNUNET_TIME_Absolute  at,
GNUNET_SCHEDULER_TaskCallback  task,
void *  task_cls 
)

Schedule a new task to be run at the specified time.

The task will be scheduled for execution once specified time has been reached. It will be run with the DEFAULT priority.

Parameters
attime at which this operation should run
taskmain function of the task
task_clsclosure of task
Returns
unique task identifier for the job only valid until task is started!

Definition at line 1255 of file scheduler.c.

1258{
1261 task,
1262 task_cls);
1263}
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_at_with_priority(struct GNUNET_TIME_Absolute at, enum GNUNET_SCHEDULER_Priority priority, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run at the specified time.
Definition: scheduler.c:1119

References GNUNET_SCHEDULER_add_at_with_priority(), and GNUNET_SCHEDULER_PRIORITY_DEFAULT.

Referenced by activate_core_visible_dv_path(), backtalker_monotime_store_cb(), backtalker_timeout_cb(), check_link_down(), connection_ready_cb(), core_init(), cummulative_ack(), data_sent_cb(), GCC_handle_duplicate_create(), GCCH_handle_channel_plaintext_data_ack(), GCT_add_channel(), GCT_handle_kx_auth(), handle_dv_box(), handle_validation_response(), insert_sorted(), manage_first_hop_mq(), path_cleanup_cb(), process_queue(), reassembly_cleanup_task(), schedule_peer_transmission(), timeout_cb(), transmit_next_request_task(), try_transmission(), update_flood_message(), and update_next_challenge_time().

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◆ GNUNET_SCHEDULER_add_delayed_with_priority()

struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_delayed_with_priority ( struct GNUNET_TIME_Relative  delay,
enum GNUNET_SCHEDULER_Priority  priority,
GNUNET_SCHEDULER_TaskCallback  task,
void *  task_cls 
)

Schedule a new task to be run with a specified delay.

The task will be scheduled for execution once the delay has expired.

Parameters
delaywhen should this operation time out?
prioritypriority to use for the task
taskmain function of the task
task_clsclosure of task
Returns
unique task identifier for the job only valid until task is started!

Definition at line 1208 of file scheduler.c.

1213{
1216 priority,
1217 task,
1218 task_cls);
1219}
struct GNUNET_TIME_Absolute GNUNET_TIME_relative_to_absolute(struct GNUNET_TIME_Relative rel)
Convert relative time to an absolute time in the future.
Definition: time.c:316

References GNUNET_SCHEDULER_add_at_with_priority(), GNUNET_TIME_relative_to_absolute(), and GNUNET_SCHEDULER_Task::priority.

Referenced by cron_flush_respect(), delayed_disconnect_channel(), delayed_restart_task(), expired_processor(), find_proof(), GNUNET_SCHEDULER_add_delayed(), GNUNET_SCHEDULER_add_select(), GNUNET_SCHEDULER_add_with_priority(), handle_discourse_subscription(), idle_request_room_messages(), load_operation(), schedule_transmit_on_queue(), and start_operation().

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◆ GNUNET_SCHEDULER_add_at_with_priority()

struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_at_with_priority ( struct GNUNET_TIME_Absolute  at,
enum GNUNET_SCHEDULER_Priority  priority,
GNUNET_SCHEDULER_TaskCallback  task,
void *  task_cls 
)

Schedule a new task to be run at the specified time.

The task will be scheduled for execution at time at.

Parameters
attime when the operation should run
prioritypriority to use for the task
taskmain function of the task
task_clsclosure of task
Returns
unique task identifier for the job only valid until task is started!

Definition at line 1119 of file scheduler.c.

1123{
1124 struct GNUNET_SCHEDULER_Task *t;
1125 struct GNUNET_SCHEDULER_Task *pos;
1127 struct GNUNET_TIME_Relative left;
1128
1129 /* scheduler must be running */
1131 GNUNET_assert (NULL != task);
1134 t->callback = task;
1135 t->callback_cls = task_cls;
1136 t->read_fd = -1;
1137 t->write_fd = -1;
1138#if PROFILE_DELAYS
1139 t->start_time = GNUNET_TIME_absolute_get ();
1140#endif
1141 t->timeout = at;
1142 t->priority = check_priority (priority);
1144 init_backtrace (t);
1145
1147 if (0 == left.rel_value_us)
1148 {
1150 if (priority > work_priority)
1151 work_priority = priority;
1152 return t;
1153 }
1154
1155 /* try tail first (optimization in case we are
1156 * appending to a long list of tasks with timeouts) */
1157 if ((NULL == pending_timeout_head) ||
1159 {
1162 t);
1163 }
1164 else
1165 {
1166 /* first move from heuristic start backwards to before start time */
1167 prev = pending_timeout_last;
1168 while ((NULL != prev) &&
1170 prev = prev->prev;
1171 /* now, move from heuristic start (or head of list) forward to insertion point */
1172 if (NULL == prev)
1174 else
1175 pos = prev->next;
1176 while ((NULL != pos) && (pos->timeout.abs_value_us <=
1178 {
1179 prev = pos;
1180 pos = pos->next;
1181 }
1184 prev,
1185 t);
1186 }
1187 /* finally, update heuristic insertion point to last insertion... */
1190 "Adding task %p\n",
1191 t);
1192 return t;
1193}
#define GNUNET_CONTAINER_DLL_insert_after(head, tail, other, element)
Insert an element into a DLL after the given other element.
struct GNUNET_TIME_Relative GNUNET_TIME_absolute_get_remaining(struct GNUNET_TIME_Absolute future)
Given a timestamp in the future, how much time remains until then?
Definition: time.c:405
struct GNUNET_SCHEDULER_Task * prev
This is a linked list.
Definition: scheduler.c:145
Time for relative time used by GNUnet, in microseconds.

References GNUNET_TIME_Absolute::abs_value_us, GNUNET_SCHEDULER_Task::callback, GNUNET_SCHEDULER_Task::callback_cls, check_priority(), current_lifeness, GNUNET_assert, GNUNET_async_scope_get(), GNUNET_CONTAINER_DLL_insert, GNUNET_CONTAINER_DLL_insert_after, GNUNET_ERROR_TYPE_DEBUG, GNUNET_new, GNUNET_TIME_absolute_get(), GNUNET_TIME_absolute_get_remaining(), init_backtrace(), GNUNET_SCHEDULER_Task::lifeness, LOG, GNUNET_SCHEDULER_Task::next, pending_timeout_head, pending_timeout_last, pending_timeout_tail, GNUNET_SCHEDULER_Task::prev, GNUNET_SCHEDULER_Task::priority, queue_ready_task(), GNUNET_SCHEDULER_Task::read_fd, GNUNET_TIME_Relative::rel_value_us, scheduler_driver, GNUNET_SCHEDULER_Task::scope, t, GNUNET_SCHEDULER_Task::timeout, work_priority, and GNUNET_SCHEDULER_Task::write_fd.

Referenced by GNUNET_SCHEDULER_add_at(), and GNUNET_SCHEDULER_add_delayed_with_priority().

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◆ GNUNET_SCHEDULER_add_read_net()

struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_read_net ( struct GNUNET_TIME_Relative  delay,
struct GNUNET_NETWORK_Handle rfd,
GNUNET_SCHEDULER_TaskCallback  task,
void *  task_cls 
)

Schedule a new task to be run with a specified delay or when the specified file descriptor is ready for reading.

The delay can be used as a timeout on the socket being ready. The task will be scheduled for execution once either the delay has expired or the socket operation is ready. It will be run with the DEFAULT priority. Only allowed to be called as long as the scheduler is running, that is one of the following conditions is met:

Parameters
delaywhen should this operation time out?
rfdread file-descriptor
taskmain function of the task
task_clsclosure of task
Returns
unique task identifier for the job only valid until task is started!

Definition at line 1512 of file scheduler.c.

1516{
1519 rfd, task, task_cls);
1520}
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_read_net_with_priority(struct GNUNET_TIME_Relative delay, enum GNUNET_SCHEDULER_Priority priority, struct GNUNET_NETWORK_Handle *rfd, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified priority and to be run after the specified delay or wh...
Definition: scheduler.c:1546

References GNUNET_SCHEDULER_add_read_net_with_priority(), and GNUNET_SCHEDULER_PRIORITY_DEFAULT.

Referenced by accept_client(), connect_success_continuation(), core_read_finished_cb(), create_listen_socket(), create_proto_queue(), delayed_restart_task(), DHTU_ip_init(), do_accept(), do_resume(), do_s5r_read(), do_scheduler_notify(), do_udp_read(), GNUNET_NAT_AUTO_test_start(), GNUNET_NAT_test_start(), init_socket(), listen_cb(), maint_child_death(), mq_init(), proto_read_kx(), queue_destroy(), queue_read(), queue_read_kx(), read_cb(), read_dns4(), read_dns6(), receive_complete_cb(), receive_ready(), resume_client_receive(), run(), scheduler_fd_cb(), select_read_cb(), service_client_recv(), sock_read(), start_client(), stun_read_task(), test_nat_punched(), and test_stun().

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◆ GNUNET_SCHEDULER_add_read_net_with_priority()

struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_read_net_with_priority ( struct GNUNET_TIME_Relative  delay,
enum GNUNET_SCHEDULER_Priority  priority,
struct GNUNET_NETWORK_Handle rfd,
GNUNET_SCHEDULER_TaskCallback  task,
void *  task_cls 
)

Schedule a new task to be run with a specified priority and to be run after the specified delay or when the specified file descriptor is ready for reading.

The delay can be used as a timeout on the socket being ready. The task will be scheduled for execution once either the delay has expired or the socket operation is ready. It will be run with the DEFAULT priority. Only allowed to be called as long as the scheduler is running, that is one of the following conditions is met:

Parameters
delaywhen should this operation time out?
prioritypriority to use for the task
rfdread file-descriptor
taskmain function of the task
task_clsclosure of task
Returns
unique task identifier for the job only valid until task is started!

Definition at line 1546 of file scheduler.c.

1552{
1553 return GNUNET_SCHEDULER_add_net_with_priority (delay, priority,
1554 rfd,
1555 GNUNET_YES,
1556 GNUNET_NO,
1557 task, task_cls);
1558}
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_net_with_priority(struct GNUNET_TIME_Relative delay, enum GNUNET_SCHEDULER_Priority priority, struct GNUNET_NETWORK_Handle *fd, int on_read, int on_write, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay or when the specified file descriptor is ready.
Definition: scheduler.c:1620

References GNUNET_NO, GNUNET_SCHEDULER_add_net_with_priority(), GNUNET_YES, and GNUNET_SCHEDULER_Task::priority.

Referenced by GNUNET_SCHEDULER_add_read_net().

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◆ GNUNET_SCHEDULER_add_write_net()

struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_write_net ( struct GNUNET_TIME_Relative  delay,
struct GNUNET_NETWORK_Handle wfd,
GNUNET_SCHEDULER_TaskCallback  task,
void *  task_cls 
)

Schedule a new task to be run with a specified delay or when the specified file descriptor is ready for writing.

The delay can be used as a timeout on the socket being ready. The task will be scheduled for execution once either the delay has expired or the socket operation is ready. It will be run with the priority of the calling task. Only allowed to be called as long as the scheduler is running, that is one of the following conditions is met:

Parameters
delaywhen should this operation time out?
wfdwrite file-descriptor
taskmain function of the task
task_clsclosure of task
Returns
unique task identifier for the job only valid until task is started!

Definition at line 1583 of file scheduler.c.

1587{
1590 wfd,
1592 task, task_cls);
1593}

References GNUNET_NO, GNUNET_SCHEDULER_add_net_with_priority(), GNUNET_SCHEDULER_PRIORITY_DEFAULT, and GNUNET_YES.

Referenced by connect_success_continuation(), do_s5r_read(), do_send(), do_write(), mq_init(), mq_send(), proto_queue_write(), proto_read_kx(), queue_read_kx(), queue_write(), select_write_cb(), signal_socks_failure(), signal_socks_success(), transmit_ready(), try_connect_using_address(), try_connection_reversal(), try_handle_plaintext(), and try_send_tcp().

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◆ GNUNET_SCHEDULER_add_net_with_priority()

struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_net_with_priority ( struct GNUNET_TIME_Relative  delay,
enum GNUNET_SCHEDULER_Priority  priority,
struct GNUNET_NETWORK_Handle fd,
int  on_read,
int  on_write,
GNUNET_SCHEDULER_TaskCallback  task,
void *  task_cls 
)

Schedule a new task to be run with a specified delay or when the specified file descriptor is ready.

The delay can be used as a timeout on the socket being ready. The task will be scheduled for execution once either the delay has expired or the socket operation is ready. Only allowed to be called as long as the scheduler is running, that is one of the following conditions is met:

Parameters
delaywhen should this operation time out?
prioritypriority of the task
fdfile-descriptor
on_readwhether to poll the file-descriptor for readability
on_writewhether to poll the file-descriptor for writability
taskmain function of the task
task_clsclosure of task
Returns
unique task identifier for the job only valid until "task" is started!

Definition at line 1620 of file scheduler.c.

1627{
1628 /* scheduler must be running */
1630 GNUNET_assert (on_read || on_write);
1632 return add_without_sets (delay, priority,
1633 on_read ? fd : NULL,
1634 on_write ? fd : NULL,
1635 NULL,
1636 NULL,
1637 task, task_cls);
1638}
int GNUNET_NETWORK_get_fd(const struct GNUNET_NETWORK_Handle *desc)
Return file descriptor for this network handle.
Definition: network.c:1000
static struct GNUNET_SCHEDULER_Task * add_without_sets(struct GNUNET_TIME_Relative delay, enum GNUNET_SCHEDULER_Priority priority, const struct GNUNET_NETWORK_Handle *read_nh, const struct GNUNET_NETWORK_Handle *write_nh, const struct GNUNET_DISK_FileHandle *read_fh, const struct GNUNET_DISK_FileHandle *write_fh, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay or when any of the specified file descriptor set...
Definition: scheduler.c:1440

References add_without_sets(), GNUNET_assert, GNUNET_NETWORK_get_fd(), GNUNET_SCHEDULER_Task::priority, and scheduler_driver.

Referenced by GNUNET_SCHEDULER_add_read_net_with_priority(), and GNUNET_SCHEDULER_add_write_net().

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◆ GNUNET_SCHEDULER_add_read_file()

struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_read_file ( struct GNUNET_TIME_Relative  delay,
const struct GNUNET_DISK_FileHandle rfd,
GNUNET_SCHEDULER_TaskCallback  task,
void *  task_cls 
)

Schedule a new task to be run with a specified delay or when the specified file descriptor is ready for reading.

The delay can be used as a timeout on the socket being ready. The task will be scheduled for execution once either the delay has expired or the socket operation is ready. It will be run with the DEFAULT priority. Only allowed to be called as long as the scheduler is running, that is one of the following conditions is met:

Parameters
delaywhen should this operation time out?
rfdread file-descriptor
taskmain function of the task
task_clsclosure of task
Returns
unique task identifier for the job only valid until task is started!

Definition at line 1662 of file scheduler.c.

1666{
1669 rfd, GNUNET_YES, GNUNET_NO,
1670 task, task_cls);
1671}
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_file_with_priority(struct GNUNET_TIME_Relative delay, enum GNUNET_SCHEDULER_Priority priority, const struct GNUNET_DISK_FileHandle *fd, int on_read, int on_write, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay or when the specified file descriptor is ready.
Definition: scheduler.c:1731

References GNUNET_NO, GNUNET_SCHEDULER_add_file_with_priority(), GNUNET_SCHEDULER_PRIORITY_DEFAULT, and GNUNET_YES.

Referenced by cmd_read(), GNUNET_ARM_request_service_start(), GNUNET_NAT_mini_get_external_ipv4_(), GNUNET_OS_command_run(), GNUNET_OS_install_parent_control_handler(), GNUNET_SCHEDULER_driver_init(), GNUNET_wait_child(), handle_command(), helper_read(), initiate_put_from_pipe_trigger(), maint_child_death(), nat_server_read(), parent_control_handler(), read_external_ipv4(), read_task(), restart_nat_server(), run(), shutdown_pipe_cb(), start_helper(), and work().

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◆ GNUNET_SCHEDULER_add_write_file()

struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_write_file ( struct GNUNET_TIME_Relative  delay,
const struct GNUNET_DISK_FileHandle wfd,
GNUNET_SCHEDULER_TaskCallback  task,
void *  task_cls 
)

Schedule a new task to be run with a specified delay or when the specified file descriptor is ready for writing.

The delay can be used as a timeout on the socket being ready. The task will be scheduled for execution once either the delay has expired or the socket operation is ready. It will be run with the DEFAULT priority. Only allowed to be called as long as the scheduler is running, that is one of the following conditions is met:

Parameters
delaywhen should this operation time out?
wfdwrite file-descriptor
taskmain function of the task
task_clsclosure of task
Returns
unique task identifier for the job only valid until task is started!

Definition at line 1695 of file scheduler.c.

1699{
1702 wfd, GNUNET_NO, GNUNET_YES,
1703 task, task_cls);
1704}

References GNUNET_NO, GNUNET_SCHEDULER_add_file_with_priority(), GNUNET_SCHEDULER_PRIORITY_DEFAULT, and GNUNET_YES.

Referenced by GNUNET_HELPER_send(), helper_write(), write_message(), and write_task().

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◆ GNUNET_SCHEDULER_add_file_with_priority()

struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_file_with_priority ( struct GNUNET_TIME_Relative  delay,
enum GNUNET_SCHEDULER_Priority  priority,
const struct GNUNET_DISK_FileHandle fd,
int  on_read,
int  on_write,
GNUNET_SCHEDULER_TaskCallback  task,
void *  task_cls 
)

Schedule a new task to be run with a specified delay or when the specified file descriptor is ready.

The delay can be used as a timeout on the socket being ready. The task will be scheduled for execution once either the delay has expired or the socket operation is ready. Only allowed to be called as long as the scheduler is running, that is one of the following conditions is met:

Parameters
delaywhen should this operation time out?
prioritypriority of the task
fdfile-descriptor
on_readwhether to poll the file-descriptor for readability
on_writewhether to poll the file-descriptor for writability
taskmain function of the task
task_clsclosure of task
Returns
unique task identifier for the job only valid until task is started!

Definition at line 1731 of file scheduler.c.

1739{
1740 /* scheduler must be running */
1742 GNUNET_assert (on_read || on_write);
1743 GNUNET_assert (fd->fd >= 0);
1744 return add_without_sets (delay, priority,
1745 NULL,
1746 NULL,
1747 on_read ? fd : NULL,
1748 on_write ? fd : NULL,
1749 task, task_cls);
1750}
int fd
File handle on Unix-like systems.

References add_without_sets(), GNUNET_DISK_FileHandle::fd, GNUNET_assert, GNUNET_SCHEDULER_Task::priority, and scheduler_driver.

Referenced by GNUNET_SCHEDULER_add_read_file(), and GNUNET_SCHEDULER_add_write_file().

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◆ GNUNET_SCHEDULER_add_select()

struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_select ( enum GNUNET_SCHEDULER_Priority  prio,
struct GNUNET_TIME_Relative  delay,
const struct GNUNET_NETWORK_FDSet rs,
const struct GNUNET_NETWORK_FDSet ws,
GNUNET_SCHEDULER_TaskCallback  task,
void *  task_cls 
)

Schedule a new task to be run with a specified delay or when any of the specified file descriptor sets is ready.

The delay can be used as a timeout on the socket(s) being ready. The task will be scheduled for execution once either the delay has expired or any of the socket operations is ready. This is the most general function of the "add" family. Note that the "prerequisite_task" must be satisfied in addition to any of the other conditions. In other words, the task will be started when (prerequisite-run) && (delay-ready || any-rs-ready || any-ws-ready) ) Only allowed to be called as long as the scheduler is running, that is one of the following conditions is met:

Parameters
priohow important is this task?
delayhow long should we wait?
rsset of file descriptors we want to read (can be NULL)
wsset of file descriptors we want to write (can be NULL)
taskmain function of the task
task_clsclosure of task
Returns
unique task identifier for the job only valid until task is started!

here we consider the case that a GNUNET_NETWORK_FDSet might be empty although its maximum FD number (nsds) is greater than 0. We handle this case gracefully because some libraries such as libmicrohttpd only provide a hint what the maximum FD number in an FD set might be and not the exact FD number (see e.g. gnunet-rest-service.c)

Definition at line 1836 of file scheduler.c.

1842{
1843 struct GNUNET_SCHEDULER_Task *t;
1844 const struct GNUNET_NETWORK_Handle **read_nhandles = NULL;
1845 const struct GNUNET_NETWORK_Handle **write_nhandles = NULL;
1846 const struct GNUNET_DISK_FileHandle **read_fhandles = NULL;
1847 const struct GNUNET_DISK_FileHandle **write_fhandles = NULL;
1848 unsigned int read_nhandles_len = 0;
1849 unsigned int write_nhandles_len = 0;
1850 unsigned int read_fhandles_len = 0;
1851 unsigned int write_fhandles_len = 0;
1852
1853 /* scheduler must be running */
1855 GNUNET_assert (NULL != task);
1856 int no_rs = (NULL == rs);
1857 int no_ws = (NULL == ws);
1858 int empty_rs = (NULL != rs) && (0 == rs->nsds);
1859 int empty_ws = (NULL != ws) && (0 == ws->nsds);
1860 int no_fds = (no_rs && no_ws) ||
1861 (empty_rs && empty_ws) ||
1862 (no_rs && empty_ws) ||
1863 (no_ws && empty_rs);
1864 if (! no_fds)
1865 {
1866 if (NULL != rs)
1867 {
1868 extract_handles (rs,
1869 &read_nhandles,
1870 &read_nhandles_len,
1871 &read_fhandles,
1872 &read_fhandles_len);
1873 }
1874 if (NULL != ws)
1875 {
1876 extract_handles (ws,
1877 &write_nhandles,
1878 &write_nhandles_len,
1879 &write_fhandles,
1880 &write_fhandles_len);
1881 }
1882 }int no_fds_extracted = (0 == read_nhandles_len) &&
1890 (0 == read_fhandles_len) &&
1891 (0 == write_nhandles_len) &&
1892 (0 == write_fhandles_len);
1893 if (no_fds || no_fds_extracted)
1895 prio,
1896 task,
1897 task_cls);
1900 init_fd_info (t,
1901 read_nhandles,
1902 read_nhandles_len,
1903 write_nhandles,
1904 write_nhandles_len,
1905 read_fhandles,
1906 read_fhandles_len,
1907 write_fhandles,
1908 write_fhandles_len);
1909 t->callback = task;
1910 t->callback_cls = task_cls;
1912 /* free the arrays of pointers to network / file handles, the actual
1913 * handles will be freed in destroy_task */
1914 GNUNET_array_grow (read_nhandles, read_nhandles_len, 0);
1915 GNUNET_array_grow (write_nhandles, write_nhandles_len, 0);
1916 GNUNET_array_grow (read_fhandles, read_fhandles_len, 0);
1917 GNUNET_array_grow (write_fhandles, write_fhandles_len, 0);
1918#if PROFILE_DELAYS
1919 t->start_time = GNUNET_TIME_absolute_get ();
1920#endif
1922 t->priority =
1923 check_priority ((prio ==
1925 prio);
1929 t);
1932 t->priority);
1934 "Adding task %p\n",
1935 t);
1936 init_backtrace (t);
1937 return t;
1938}
#define GNUNET_MAX(a, b)
#define GNUNET_array_grow(arr, size, tsize)
Grow a well-typed (!) array.
static void driver_add_multiple(struct GNUNET_SCHEDULER_Task *t)
calls the given function func on each FdInfo related to t.
Definition: scheduler.c:915
void init_fd_info(struct GNUNET_SCHEDULER_Task *t, const struct GNUNET_NETWORK_Handle *const *read_nh, unsigned int read_nh_len, const struct GNUNET_NETWORK_Handle *const *write_nh, unsigned int write_nh_len, const struct GNUNET_DISK_FileHandle *const *read_fh, unsigned int read_fh_len, const struct GNUNET_DISK_FileHandle *const *write_fh, unsigned int write_fh_len)
Definition: scheduler.c:797
void extract_handles(const struct GNUNET_NETWORK_FDSet *fdset, const struct GNUNET_NETWORK_Handle ***ntarget, unsigned int *extracted_nhandles, const struct GNUNET_DISK_FileHandle ***ftarget, unsigned int *extracted_fhandles)
Definition: scheduler.c:1754
int nsds
Maximum number of any socket descriptor in the set (plus one)
handle to a socket
Definition: network.c:53
int own_handles
Do we own the network and file handles referenced by the FdInfo structs in the fds array.
Definition: scheduler.c:179

References GNUNET_SCHEDULER_Task::callback, GNUNET_SCHEDULER_Task::callback_cls, check_priority(), current_lifeness, current_priority, driver_add_multiple(), extract_handles(), GNUNET_array_grow, GNUNET_assert, GNUNET_async_scope_get(), GNUNET_CONTAINER_DLL_insert, GNUNET_ERROR_TYPE_DEBUG, GNUNET_MAX, GNUNET_new, GNUNET_SCHEDULER_add_delayed_with_priority(), GNUNET_SCHEDULER_PRIORITY_KEEP, GNUNET_TIME_absolute_get(), GNUNET_TIME_relative_to_absolute(), GNUNET_YES, init_backtrace(), init_fd_info(), GNUNET_SCHEDULER_Task::lifeness, LOG, max_priority_added, GNUNET_NETWORK_FDSet::nsds, GNUNET_SCHEDULER_Task::own_handles, pending_head, pending_tail, GNUNET_SCHEDULER_Task::priority, scheduler_driver, GNUNET_SCHEDULER_Task::scope, t, and GNUNET_SCHEDULER_Task::timeout.

Referenced by context_task(), curl_download_prepare(), download_prepare(), listen_stdio(), prepare_daemon(), run_httpd(), schedule_httpd(), and schedule_read().

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◆ GNUNET_SCHEDULER_set_select()

void GNUNET_SCHEDULER_set_select ( GNUNET_SCHEDULER_select  new_select,
void *  new_select_cls 
)

Sets the select function to use in the scheduler (scheduler_select).

Parameters
new_selectnew select function to use (NULL to reset to default)
new_select_clsclosure for new_select
new_selectnew select function to use
new_select_clsclosure for new_select
Returns
previously used select function, NULL for default

Definition at line 447 of file scheduler.c.

449{
450 scheduler_select = new_select;
451 scheduler_select_cls = new_select_cls;
452}
static GNUNET_SCHEDULER_select scheduler_select
Function to use as a select() in the scheduler.
Definition: scheduler.c:426
static void * scheduler_select_cls
Closure for scheduler_select.
Definition: scheduler.c:436

References scheduler_select, and scheduler_select_cls.

◆ GNUNET_SCHEDULER_begin_async_scope()

void GNUNET_SCHEDULER_begin_async_scope ( struct GNUNET_AsyncScopeId aid)

Change the async scope for the currently executing task and (transitively) for all tasks scheduled by the current task after calling this function.

Nested tasks can begin their own nested async scope.

Once the current task is finished, the async scope ID is reset to its previous value.

Must only be called from a running task.

Parameters
aidthe asynchronous scope id to enter

Definition at line 2572 of file scheduler.c.

2573{
2574 struct GNUNET_AsyncScopeSave dummy_old_scope;
2575
2576 GNUNET_assert (NULL != active_task);
2577 /* Since we're in a task, the context will be automatically
2578 restored by the scheduler. */
2579 GNUNET_async_scope_enter (aid, &dummy_old_scope);
2580}

References active_task, GNUNET_assert, and GNUNET_async_scope_enter().

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