GNUnet  0.11.x
Data Structures | Macros | Functions | Variables
scheduler.c File Reference

schedule computations using continuation passing style More...

#include "platform.h"
#include "gnunet_util_lib.h"
#include "disk.h"
#include <inttypes.h>
Include dependency graph for scheduler.c:

Go to the source code of this file.

Data Structures

struct  GNUNET_SCHEDULER_Handle
 Argument to be passed from the driver to GNUNET_SCHEDULER_do_work(). More...
 
struct  GNUNET_SCHEDULER_Task
 Entry in list of pending tasks. More...
 
struct  Scheduled
 A struct representing an event the select driver is waiting for. More...
 
struct  DriverContext
 Driver context used by GNUNET_SCHEDULER_run. More...
 

Macros

#define LOG(kind, ...)   GNUNET_log_from (kind, "util-scheduler", __VA_ARGS__)
 
#define LOG_STRERROR(kind, syscall)
 
#define PROFILE_DELAYS   GNUNET_NO
 Should we figure out which tasks are delayed for a while before they are run? (Consider using in combination with EXECINFO). More...
 
#define DELAY_THRESHOLD   GNUNET_TIME_UNIT_SECONDS
 Task that were in the queue for longer than this are reported if PROFILE_DELAYS is active. More...
 

Functions

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...
 
static enum GNUNET_SCHEDULER_Priority check_priority (enum GNUNET_SCHEDULER_Priority p)
 Check that the given priority is legal (and return it). More...
 
struct GNUNET_TIME_Absolute get_timeout ()
 chooses the nearest timeout from all pending tasks, to be used to tell the driver the next wakeup time (using its set_wakeup callback) More...
 
static void queue_ready_task (struct GNUNET_SCHEDULER_Task *task)
 Put a task that is ready for execution into the ready queue. More...
 
void GNUNET_SCHEDULER_shutdown ()
 Request the shutdown of a scheduler. More...
 
static void dump_backtrace (struct GNUNET_SCHEDULER_Task *t)
 Output stack trace of task t. More...
 
static void destroy_task (struct GNUNET_SCHEDULER_Task *t)
 Destroy a task (release associated resources) More...
 
static void sighandler_pipe ()
 Signal handler called for SIGPIPE. More...
 
static void sighandler_shutdown ()
 Wait for a short time. More...
 
static void shutdown_if_no_lifeness ()
 
static int select_loop (struct GNUNET_SCHEDULER_Handle *sh, struct DriverContext *context)
 
void GNUNET_SCHEDULER_run (GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
 Initialize and run scheduler. More...
 
const struct GNUNET_SCHEDULER_TaskContextGNUNET_SCHEDULER_get_task_context ()
 Obtain the task context, giving the reason why the current task was started. More...
 
unsigned int GNUNET_SCHEDULER_get_load (enum GNUNET_SCHEDULER_Priority p)
 Get information about the current load of this scheduler. More...
 
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)
 
static void driver_add_multiple (struct GNUNET_SCHEDULER_Task *t)
 calls the given function func on each FdInfo related to t. More...
 
static void install_parent_control_handler (void *cls)
 
static void shutdown_pipe_cb (void *cls)
 
void * GNUNET_SCHEDULER_cancel (struct GNUNET_SCHEDULER_Task *task)
 Cancel the task with the specified identifier. More...
 
static void init_backtrace (struct GNUNET_SCHEDULER_Task *t)
 Initialize backtrace data for task t. 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_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_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_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_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 (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_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...
 
static struct GNUNET_SCHEDULER_Taskadd_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 sets is ready. 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...
 
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)
 
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_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...
 
static int select_add (void *cls, struct GNUNET_SCHEDULER_Task *task, struct GNUNET_SCHEDULER_FdInfo *fdi)
 
static int select_del (void *cls, struct GNUNET_SCHEDULER_Task *task)
 
static void select_set_wakeup (void *cls, struct GNUNET_TIME_Absolute dt)
 
struct GNUNET_SCHEDULER_DriverGNUNET_SCHEDULER_driver_select ()
 Obtain the driver for using select() as the event loop. 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...
 

Variables

static const struct GNUNET_SCHEDULER_Driverscheduler_driver
 The driver used for the event loop. More...
 
static struct GNUNET_SCHEDULER_Taskpending_head
 Head of list of tasks waiting for an event. More...
 
static struct GNUNET_SCHEDULER_Taskpending_tail
 Tail of list of tasks waiting for an event. More...
 
static struct GNUNET_SCHEDULER_Taskshutdown_head
 Head of list of tasks waiting for shutdown. More...
 
static struct GNUNET_SCHEDULER_Taskshutdown_tail
 Tail of list of tasks waiting for shutdown. More...
 
static struct GNUNET_SCHEDULER_Taskpending_timeout_head
 List of tasks waiting ONLY for a timeout event. More...
 
static struct GNUNET_SCHEDULER_Taskpending_timeout_tail
 List of tasks waiting ONLY for a timeout event. More...
 
static struct GNUNET_SCHEDULER_Taskpending_timeout_last
 Last inserted task waiting ONLY for a timeout event. More...
 
static struct GNUNET_SCHEDULER_Taskactive_task
 ID of the task that is running right now. More...
 
static struct GNUNET_SCHEDULER_Taskready_head [GNUNET_SCHEDULER_PRIORITY_COUNT]
 Head of list of tasks ready to run right now, grouped by importance. More...
 
static struct GNUNET_SCHEDULER_Taskready_tail [GNUNET_SCHEDULER_PRIORITY_COUNT]
 Tail of list of tasks ready to run right now, grouped by importance. More...
 
static struct GNUNET_SCHEDULER_Taskinstall_parent_control_task
 Task for installing parent control handlers (it might happen that the scheduler is shutdown before this task is executed, so GNUNET_SCHEDULER_shutdown must cancel it in that case) More...
 
static struct GNUNET_SCHEDULER_Taskshutdown_pipe_task
 Task for reading from a pipe that signal handlers will use to initiate shutdown. More...
 
static unsigned int ready_count
 Number of tasks on the ready list. More...
 
static enum GNUNET_SCHEDULER_Priority current_priority
 Priority of the task running right now. More...
 
static enum GNUNET_SCHEDULER_Priority max_priority_added
 Priority of the highest task added in the current select iteration. More...
 
static int current_lifeness
 Value of the 'lifeness' flag for the current task. More...
 
static GNUNET_SCHEDULER_select scheduler_select
 Function to use as a select() in the scheduler. More...
 
static struct GNUNET_SCHEDULER_TaskContext tc
 Task context of the current task. More...
 
static void * scheduler_select_cls
 Closure for scheduler_select. More...
 
static struct GNUNET_DISK_PipeHandleshutdown_pipe_handle
 Pipe used to communicate shutdown via signal. More...
 
static pid_t my_pid
 Process ID of this process at the time we installed the various signal handlers. More...
 

Detailed Description

schedule computations using continuation passing style

Author
Christian Grothoff

Definition in file scheduler.c.

Macro Definition Documentation

◆ LOG

#define LOG (   kind,
  ... 
)    GNUNET_log_from (kind, "util-scheduler", __VA_ARGS__)

◆ LOG_STRERROR

#define LOG_STRERROR (   kind,
  syscall 
)
Value:
"util-scheduler", \
syscall)
#define GNUNET_log_from_strerror(level, component, cmd)
Log an error message at log-level &#39;level&#39; that indicates a failure of the command &#39;cmd&#39; with the mess...

Definition at line 33 of file scheduler.c.

Referenced by select_loop().

◆ PROFILE_DELAYS

#define PROFILE_DELAYS   GNUNET_NO

Should we figure out which tasks are delayed for a while before they are run? (Consider using in combination with EXECINFO).

Definition at line 67 of file scheduler.c.

◆ DELAY_THRESHOLD

#define DELAY_THRESHOLD   GNUNET_TIME_UNIT_SECONDS

Task that were in the queue for longer than this are reported if PROFILE_DELAYS is active.

Definition at line 73 of file scheduler.c.

Referenced by GNUNET_SCHEDULER_do_work().

Function Documentation

◆ check_priority()

static enum GNUNET_SCHEDULER_Priority check_priority ( enum GNUNET_SCHEDULER_Priority  p)
static

Check that the given priority is legal (and return it).

Parameters
ppriority value to check
Returns
p on success, 0 on error

Definition at line 449 of file scheduler.c.

References GNUNET_assert, GNUNET_SCHEDULER_PRIORITY_COUNT, and p.

Referenced by add_without_sets(), GNUNET_SCHEDULER_add_at_with_priority(), GNUNET_SCHEDULER_add_select(), GNUNET_SCHEDULER_add_with_reason_and_priority(), GNUNET_SCHEDULER_cancel(), GNUNET_SCHEDULER_get_load(), and queue_ready_task().

450 {
451  if ((p >= 0) && (p < GNUNET_SCHEDULER_PRIORITY_COUNT))
452  return p;
453  GNUNET_assert (0);
454  return 0; /* make compiler happy */
455 }
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
static struct GNUNET_OS_Process * p
Helper process we started.
Definition: gnunet-qr.c:59
Number of priorities (must be the last priority).
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◆ get_timeout()

struct GNUNET_TIME_Absolute get_timeout ( )

chooses the nearest timeout from all pending tasks, to be used to tell the driver the next wakeup time (using its set_wakeup callback)

Definition at line 464 of file scheduler.c.

References GNUNET_TIME_Absolute::abs_value_us, GNUNET_TIME_absolute_get(), GNUNET_TIME_UNIT_FOREVER_ABS, GNUNET_SCHEDULER_Task::next, pending_timeout_head, and timeout.

Referenced by GNUNET_SCHEDULER_do_work(), and GNUNET_SCHEDULER_driver_init().

465 {
466  struct GNUNET_SCHEDULER_Task *pos;
467  struct GNUNET_TIME_Absolute now;
469 
470  pos = pending_timeout_head;
471  now = GNUNET_TIME_absolute_get ();
473  if (NULL != pos)
474  {
475  if (0 != pos->reason)
476  {
477  return now;
478  }
479  else
480  {
481  timeout = pos->timeout;
482  }
483  }
484  for (pos = pending_head; NULL != pos; pos = pos->next)
485  {
486  if (0 != pos->reason)
487  {
488  return now;
489  }
490  else if ((pos->timeout.abs_value_us !=
491  GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us) &&
492  (timeout.abs_value_us > pos->timeout.abs_value_us))
493  {
494  timeout = pos->timeout;
495  }
496  }
497  return timeout;
498 }
static struct GNUNET_SCHEDULER_Task * pending_head
Head of list of tasks waiting for an event.
Definition: scheduler.c:316
#define GNUNET_TIME_UNIT_FOREVER_ABS
Constant used to specify "forever".
static struct GNUNET_TIME_Relative timeout
Desired timeout for the lookup (default is no timeout).
Definition: gnunet-abd.c:61
static struct GNUNET_SCHEDULER_Task * pending_timeout_head
List of tasks waiting ONLY for a timeout event.
Definition: scheduler.c:340
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_get(void)
Get the current time.
Definition: time.c:118
struct GNUNET_SCHEDULER_Task * next
This is a linked list.
Definition: scheduler.c:139
Entry in list of pending tasks.
Definition: scheduler.c:134
Time for absolute times used by GNUnet, in microseconds.
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◆ queue_ready_task()

static void queue_ready_task ( struct GNUNET_SCHEDULER_Task task)
static

Put a task that is ready for execution into the ready queue.

Parameters
tasktask ready for execution

Definition at line 507 of file scheduler.c.

References check_priority(), GNUNET_CONTAINER_DLL_insert, GNUNET_YES, GNUNET_SCHEDULER_Task::in_ready_list, p, GNUNET_SCHEDULER_Task::priority, and ready_count.

Referenced by GNUNET_SCHEDULER_add_with_reason_and_priority(), GNUNET_SCHEDULER_do_work(), GNUNET_SCHEDULER_shutdown(), and GNUNET_SCHEDULER_task_ready().

508 {
510 
512  ready_tail[p],
513  task);
514  task->in_ready_list = GNUNET_YES;
515  ready_count++;
516 }
static unsigned int ready_count
Number of tasks on the ready list.
Definition: scheduler.c:390
#define GNUNET_CONTAINER_DLL_insert(head, tail, element)
Insert an element at the head of a DLL.
GNUNET_SCHEDULER_Priority
Valid task priorities.
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:371
static struct GNUNET_OS_Process * p
Helper process we started.
Definition: gnunet-qr.c:59
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:365
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:449
#define GNUNET_YES
Definition: gnunet_common.h:77
enum GNUNET_SCHEDULER_Priority priority
Task priority.
Definition: scheduler.c:203
int in_ready_list
Is this task in the ready list?
Definition: scheduler.c:229
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◆ dump_backtrace()

static void dump_backtrace ( struct GNUNET_SCHEDULER_Task t)
static

Output stack trace of task t.

Parameters
ttask to dump stack trace of

Definition at line 559 of file scheduler.c.

References GNUNET_ERROR_TYPE_WARNING, and LOG.

Referenced by GNUNET_SCHEDULER_do_work(), init_backtrace(), and select_loop().

560 {
561 #if EXECINFO
562  for (unsigned int i = 0; i < t->num_backtrace_strings; i++)
564  "Task %p trace %u: %s\n",
565  t,
566  i,
567  t->backtrace_strings[i]);
568 #else
569  (void) t;
570 #endif
571 }
#define LOG(kind,...)
Definition: scheduler.c:31
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◆ destroy_task()

static void destroy_task ( struct GNUNET_SCHEDULER_Task t)
static

Destroy a task (release associated resources)

Parameters
ttask to destroy

Definition at line 580 of file scheduler.c.

References GNUNET_NETWORK_Handle::fd, GNUNET_SCHEDULER_FdInfo::fd, GNUNET_SCHEDULER_Task::fds, GNUNET_SCHEDULER_Task::fds_len, fh, GNUNET_SCHEDULER_FdInfo::fh, GNUNET_array_grow, GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, GNUNET_NETWORK_socket_free_memory_only_(), GNUNET_YES, LOG, and GNUNET_SCHEDULER_Task::own_handles.

Referenced by GNUNET_SCHEDULER_cancel(), and GNUNET_SCHEDULER_do_work().

581 {
582  unsigned int i;
583 
585  "destroying task %p\n",
586  t);
587 
588  if (GNUNET_YES == t->own_handles)
589  {
590  for (i = 0; i != t->fds_len; ++i)
591  {
592  const struct GNUNET_NETWORK_Handle *fd = t->fds[i].fd;
593  const struct GNUNET_DISK_FileHandle *fh = t->fds[i].fh;
594  if (fd)
595  {
597  GNUNET_NETWORK_Handle *) fd);
598  }
599  if (fh)
600  {
601  // FIXME: on WIN32 this is not enough! A function
602  // GNUNET_DISK_file_free_memory_only would be nice
603  GNUNET_free ((void *) fh);
604  }
605  }
606  }
607  if (t->fds_len > 1)
608  {
609  GNUNET_array_grow (t->fds, t->fds_len, 0);
610  }
611 #if EXECINFO
612  GNUNET_free (t->backtrace_strings);
613 #endif
614  GNUNET_free (t);
615 }
void GNUNET_NETWORK_socket_free_memory_only_(struct GNUNET_NETWORK_Handle *desc)
Only free memory of a socket, keep the file descriptor untouched.
Definition: network.c:622
#define GNUNET_array_grow(arr, size, tsize)
Grow a well-typed (!) array.
const struct GNUNET_DISK_FileHandle * fh
GNUnet file handle the event is about, matches sock, NULL if this is about a network socket or if no ...
const struct GNUNET_NETWORK_Handle * fd
GNUnet network socket the event is about, matches sock, NULL if this is about a file handle or if no ...
static int fh
Handle to the unique file.
struct GNUNET_SCHEDULER_FdInfo * fds
Information about which FDs are ready for this task (and why).
Definition: scheduler.c:159
#define LOG(kind,...)
Definition: scheduler.c:31
unsigned int fds_len
Size of the fds array.
Definition: scheduler.c:171
int own_handles
Do we own the network and file handles referenced by the FdInfo structs in the fds array...
Definition: scheduler.c:178
handle to a socket
Definition: network.c:52
#define GNUNET_YES
Definition: gnunet_common.h:77
Handle used to access files (and pipes).
#define GNUNET_free(ptr)
Wrapper around free.
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◆ sighandler_pipe()

static void sighandler_pipe ( )
static

Signal handler called for SIGPIPE.

Definition at line 633 of file scheduler.c.

Referenced by GNUNET_SCHEDULER_driver_init().

634 {
635  return;
636 }
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◆ sighandler_shutdown()

static void sighandler_shutdown ( )
static

Wait for a short time.

Sleeps for ms ms (as that should be long enough for virtually all modern systems to context switch and allow another process to do some 'real' work).

Parameters
mshow many ms to wait Signal handler called for signals that should cause us to shutdown.

Definition at line 661 of file scheduler.c.

References GNUNET_DISK_file_write(), GNUNET_DISK_PIPE_END_WRITE, GNUNET_DISK_pipe_handle(), and my_pid.

Referenced by GNUNET_SCHEDULER_driver_init().

662 {
663  static char c;
664  int old_errno = errno; /* backup errno */
665 
666  if (getpid () != my_pid)
667  _exit (1); /* we have fork'ed since the signal handler was created,
668  * ignore the signal, see https://gnunet.org/vfork discussion */
671  &c, sizeof(c));
672  errno = old_errno;
673 }
static pid_t my_pid
Process ID of this process at the time we installed the various signal handlers.
Definition: scheduler.c:627
static struct GNUNET_DISK_PipeHandle * shutdown_pipe_handle
Pipe used to communicate shutdown via signal.
Definition: scheduler.c:621
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:1753
ssize_t GNUNET_DISK_file_write(const struct GNUNET_DISK_FileHandle *h, const void *buffer, size_t n)
Write a buffer to a file.
Definition: disk.c:820
The writing-end of a pipe.
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◆ shutdown_if_no_lifeness()

static void shutdown_if_no_lifeness ( )
static

Definition at line 677 of file scheduler.c.

References context, GNUNET_SCHEDULER_shutdown(), GNUNET_YES, GNUNET_SCHEDULER_Task::lifeness, GNUNET_SCHEDULER_Task::next, ready_count, select_loop(), sh, and t.

Referenced by GNUNET_SCHEDULER_do_work().

678 {
679  struct GNUNET_SCHEDULER_Task *t;
680 
681  if (ready_count > 0)
682  return;
683  for (t = pending_head; NULL != t; t = t->next)
684  if (GNUNET_YES == t->lifeness)
685  return;
686  for (t = shutdown_head; NULL != t; t = t->next)
687  if (GNUNET_YES == t->lifeness)
688  return;
689  for (t = pending_timeout_head; NULL != t; t = t->next)
690  if (GNUNET_YES == t->lifeness)
691  return;
692  /* No lifeness! */
694 }
static unsigned int ready_count
Number of tasks on the ready list.
Definition: scheduler.c:390
static struct GNUNET_SCHEDULER_Task * pending_head
Head of list of tasks waiting for an event.
Definition: scheduler.c:316
static struct GNUNET_SCHEDULER_Task * t
Main task.
void GNUNET_SCHEDULER_shutdown()
Request the shutdown of a scheduler.
Definition: scheduler.c:526
static struct GNUNET_SCHEDULER_Task * pending_timeout_head
List of tasks waiting ONLY for a timeout event.
Definition: scheduler.c:340
struct GNUNET_SCHEDULER_Task * next
This is a linked list.
Definition: scheduler.c:139
Entry in list of pending tasks.
Definition: scheduler.c:134
#define GNUNET_YES
Definition: gnunet_common.h:77
static struct GNUNET_SCHEDULER_Task * shutdown_head
Head of list of tasks waiting for shutdown.
Definition: scheduler.c:326
int lifeness
Should the existence of this task in the queue be counted as reason to not shutdown the scheduler...
Definition: scheduler.c:219
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◆ select_loop()

static int select_loop ( struct GNUNET_SCHEDULER_Handle sh,
struct DriverContext context 
)
static

Definition at line 2279 of file scheduler.c.

References GNUNET_TIME_Absolute::abs_value_us, dump_backtrace(), GNUNET_assert, GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_ERROR_TYPE_WARNING, GNUNET_NETWORK_fdset_create(), GNUNET_NETWORK_fdset_destroy(), GNUNET_NETWORK_fdset_set_native(), GNUNET_NETWORK_fdset_test_native(), GNUNET_NETWORK_fdset_zero(), GNUNET_NETWORK_socket_select(), GNUNET_NO, GNUNET_OK, GNUNET_SCHEDULER_do_work(), GNUNET_SCHEDULER_ET_IN, GNUNET_SCHEDULER_ET_OUT, GNUNET_SCHEDULER_task_ready(), GNUNET_STRINGS_absolute_time_to_string(), GNUNET_SYSERR, GNUNET_TIME_absolute_get_remaining(), GNUNET_TIME_UNIT_FOREVER_ABS, GNUNET_YES, LOG, LOG_STRERROR, Scheduled::next, GNUNET_SCHEDULER_Handle::rs, DriverContext::scheduled_head, scheduler_select, scheduler_select_cls, DriverContext::timeout, and GNUNET_SCHEDULER_Handle::ws.

Referenced by GNUNET_SCHEDULER_run(), and shutdown_if_no_lifeness().

2281 {
2282  struct GNUNET_NETWORK_FDSet *rs;
2283  struct GNUNET_NETWORK_FDSet *ws;
2284  int select_result;
2285 
2286  GNUNET_assert (NULL != context);
2289  while ((NULL != context->scheduled_head) ||
2290  (GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us !=
2291  context->timeout.abs_value_us))
2292  {
2294  "select timeout = %s\n",
2296 
2299 
2300  for (struct Scheduled *pos = context->scheduled_head;
2301  NULL != pos;
2302  pos = pos->next)
2303  {
2304  if (0 != (GNUNET_SCHEDULER_ET_IN & pos->et))
2305  {
2306  GNUNET_NETWORK_fdset_set_native (rs, pos->fdi->sock);
2307  }
2308  if (0 != (GNUNET_SCHEDULER_ET_OUT & pos->et))
2309  {
2310  GNUNET_NETWORK_fdset_set_native (ws, pos->fdi->sock);
2311  }
2312  }
2313  struct GNUNET_TIME_Relative time_remaining =
2315  if (NULL == scheduler_select)
2316  {
2317  select_result = GNUNET_NETWORK_socket_select (rs,
2318  ws,
2319  NULL,
2320  time_remaining);
2321  }
2322  else
2323  {
2324  select_result = scheduler_select (scheduler_select_cls,
2325  rs,
2326  ws,
2327  NULL,
2328  time_remaining);
2329  }
2330  if (select_result == GNUNET_SYSERR)
2331  {
2332  if (errno == EINTR)
2333  continue;
2334 
2336  "select");
2337 #if USE_LSOF
2338  char lsof[512];
2339 
2340  snprintf (lsof,
2341  sizeof(lsof),
2342  "lsof -p %d",
2343  getpid ());
2344  (void) close (1);
2345  (void) dup2 (2, 1);
2346  if (0 != system (lsof))
2348  "system");
2349 #endif
2350 #if DEBUG_FDS
2351  for (struct Scheduled *s = context->scheduled_head;
2352  NULL != s;
2353  s = s->next)
2354  {
2355  int flags = fcntl (s->fdi->sock,
2356  F_GETFD);
2357 
2358  if ((flags == -1) &&
2359  (EBADF == errno))
2360  {
2362  "Got invalid file descriptor %d!\n",
2363  s->fdi->sock);
2364 #if EXECINFO
2365  dump_backtrace (s->task);
2366 #endif
2367  }
2368  }
2369 #endif
2370  GNUNET_assert (0);
2373  return GNUNET_SYSERR;
2374  }
2375  if (select_result > 0)
2376  {
2377  for (struct Scheduled *pos = context->scheduled_head;
2378  NULL != pos;
2379  pos = pos->next)
2380  {
2381  int is_ready = GNUNET_NO;
2382 
2383  if ((0 != (GNUNET_SCHEDULER_ET_IN & pos->et)) &&
2384  (GNUNET_YES ==
2386  pos->fdi->sock)) )
2387  {
2388  pos->fdi->et |= GNUNET_SCHEDULER_ET_IN;
2389  is_ready = GNUNET_YES;
2390  }
2391  if ((0 != (GNUNET_SCHEDULER_ET_OUT & pos->et)) &&
2392  (GNUNET_YES ==
2394  pos->fdi->sock)) )
2395  {
2396  pos->fdi->et |= GNUNET_SCHEDULER_ET_OUT;
2397  is_ready = GNUNET_YES;
2398  }
2399  if (GNUNET_YES == is_ready)
2400  {
2401  GNUNET_SCHEDULER_task_ready (pos->task,
2402  pos->fdi);
2403  }
2404  }
2405  }
2407  {
2409  "scheduler has more tasks ready!\n");
2410  }
2411  }
2414  return GNUNET_OK;
2415 }
void GNUNET_NETWORK_fdset_set_native(struct GNUNET_NETWORK_FDSet *to, int nfd)
Set a native fd in a set.
Definition: network.c:1137
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
static GNUNET_SCHEDULER_select scheduler_select
Function to use as a select() in the scheduler.
Definition: scheduler.c:413
int GNUNET_NETWORK_fdset_test_native(const struct GNUNET_NETWORK_FDSet *to, int nfd)
Test native fd in a set.
Definition: network.c:1155
#define GNUNET_NO
Definition: gnunet_common.h:78
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
struct Scheduled * scheduled_head
the head of a DLL containing information about the events the select driver is waiting for ...
Definition: scheduler.c:288
uint64_t abs_value_us
The actual value.
#define GNUNET_TIME_UNIT_FOREVER_ABS
Constant used to specify "forever".
void GNUNET_NETWORK_fdset_destroy(struct GNUNET_NETWORK_FDSet *fds)
Releases the associated memory of an fd set.
Definition: network.c:1266
struct GNUNET_NETWORK_FDSet * GNUNET_NETWORK_fdset_create(void)
Creates an fd set.
Definition: network.c:1250
collection of IO descriptors
A struct representing an event the select driver is waiting for.
Definition: scheduler.c:254
Buffer available for writing.
#define LOG_STRERROR(kind, syscall)
Definition: scheduler.c:33
int GNUNET_NETWORK_socket_select(struct GNUNET_NETWORK_FDSet *rfds, struct GNUNET_NETWORK_FDSet *wfds, struct GNUNET_NETWORK_FDSet *efds, struct GNUNET_TIME_Relative timeout)
Check if sockets meet certain conditions.
Definition: network.c:1340
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
Data available for reading.
#define LOG(kind,...)
Definition: scheduler.c:31
void GNUNET_NETWORK_fdset_zero(struct GNUNET_NETWORK_FDSet *fds)
Reset FD set (clears all file descriptors).
Definition: network.c:997
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...
Definition: scheduler.c:1972
struct GNUNET_TIME_Absolute timeout
the time when the select driver will wake up again (after calling select)
Definition: scheduler.c:300
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:331
#define GNUNET_YES
Definition: gnunet_common.h:77
static void dump_backtrace(struct GNUNET_SCHEDULER_Task *t)
Output stack trace of task t.
Definition: scheduler.c:559
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 d...
Definition: scheduler.c:1927
const char * GNUNET_STRINGS_absolute_time_to_string(struct GNUNET_TIME_Absolute t)
Like asctime, except for GNUnet time.
Definition: strings.c:742
struct Scheduled * next
Definition: scheduler.c:258
static void * scheduler_select_cls
Closure for scheduler_select.
Definition: scheduler.c:423
Time for relative time used by GNUnet, in microseconds.
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◆ init_fd_info()

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 at line 782 of file scheduler.c.

References GNUNET_SCHEDULER_FdInfo::et, GNUNET_SCHEDULER_FdInfo::fd, GNUNET_SCHEDULER_Task::fds, GNUNET_SCHEDULER_Task::fds_len, GNUNET_SCHEDULER_Task::fdx, GNUNET_SCHEDULER_FdInfo::fh, GNUNET_assert, GNUNET_NETWORK_get_fd(), GNUNET_new_array, GNUNET_SCHEDULER_ET_IN, GNUNET_SCHEDULER_ET_OUT, GNUNET_SCHEDULER_Task::read_fd, GNUNET_SCHEDULER_FdInfo::sock, and GNUNET_SCHEDULER_Task::write_fd.

Referenced by add_without_sets(), and GNUNET_SCHEDULER_add_select().

791 {
792  // FIXME: if we have exactly two network handles / exactly two file handles
793  // and they are equal, we can make one FdInfo with both
794  // GNUNET_SCHEDULER_ET_IN and GNUNET_SCHEDULER_ET_OUT set.
795  struct GNUNET_SCHEDULER_FdInfo *fdi;
796 
797  t->fds_len = read_nh_len + write_nh_len + read_fh_len + write_fh_len;
798  if (1 == t->fds_len)
799  {
800  fdi = &t->fdx;
801  t->fds = fdi;
802  if (1 == read_nh_len)
803  {
804  GNUNET_assert (NULL != read_nh);
805  GNUNET_assert (NULL != *read_nh);
806  fdi->fd = *read_nh;
807  fdi->et = GNUNET_SCHEDULER_ET_IN;
808  fdi->sock = GNUNET_NETWORK_get_fd (*read_nh);
809  t->read_fd = fdi->sock;
810  t->write_fd = -1;
811  }
812  else if (1 == write_nh_len)
813  {
814  GNUNET_assert (NULL != write_nh);
815  GNUNET_assert (NULL != *write_nh);
816  fdi->fd = *write_nh;
818  fdi->sock = GNUNET_NETWORK_get_fd (*write_nh);
819  t->read_fd = -1;
820  t->write_fd = fdi->sock;
821  }
822  else if (1 == read_fh_len)
823  {
824  GNUNET_assert (NULL != read_fh);
825  GNUNET_assert (NULL != *read_fh);
826  fdi->fh = *read_fh;
827  fdi->et = GNUNET_SCHEDULER_ET_IN;
828  fdi->sock = (*read_fh)->fd; // FIXME: does not work under WIN32
829  t->read_fd = fdi->sock;
830  t->write_fd = -1;
831  }
832  else
833  {
834  GNUNET_assert (NULL != write_fh);
835  GNUNET_assert (NULL != *write_fh);
836  fdi->fh = *write_fh;
838  fdi->sock = (*write_fh)->fd; // FIXME: does not work under WIN32
839  t->read_fd = -1;
840  t->write_fd = fdi->sock;
841  }
842  }
843  else
844  {
846  t->fds = fdi;
847  t->read_fd = -1;
848  t->write_fd = -1;
849  unsigned int i;
850  for (i = 0; i != read_nh_len; ++i)
851  {
852  fdi->fd = read_nh[i];
853  GNUNET_assert (NULL != fdi->fd);
854  fdi->et = GNUNET_SCHEDULER_ET_IN;
855  fdi->sock = GNUNET_NETWORK_get_fd (read_nh[i]);
856  ++fdi;
857  }
858  for (i = 0; i != write_nh_len; ++i)
859  {
860  fdi->fd = write_nh[i];
861  GNUNET_assert (NULL != fdi->fd);
863  fdi->sock = GNUNET_NETWORK_get_fd (write_nh[i]);
864  ++fdi;
865  }
866  for (i = 0; i != read_fh_len; ++i)
867  {
868  fdi->fh = read_fh[i];
869  GNUNET_assert (NULL != fdi->fh);
870  fdi->et = GNUNET_SCHEDULER_ET_IN;
871  fdi->sock = (read_fh[i])->fd; // FIXME: does not work under WIN32
872  ++fdi;
873  }
874  for (i = 0; i != write_fh_len; ++i)
875  {
876  fdi->fh = write_fh[i];
877  GNUNET_assert (NULL != fdi->fh);
879  fdi->sock = (write_fh[i])->fd; // FIXME: does not work under WIN32
880  ++fdi;
881  }
882  }
883 }
int GNUNET_NETWORK_get_fd(const struct GNUNET_NETWORK_Handle *desc)
Return file descriptor for this network handle.
Definition: network.c:1080
int read_fd
Set if we only wait for reading from a single FD, otherwise -1.
Definition: scheduler.c:208
Information about an event relating to a file descriptor/socket.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
int write_fd
Set if we only wait for writing to a single FD, otherwise -1.
Definition: scheduler.c:213
struct GNUNET_SCHEDULER_FdInfo fdx
Storage location used for fds if we want to avoid a separate malloc() call in the common case that th...
Definition: scheduler.c:166
int sock
Underlying OS handle the event was about.
#define GNUNET_new_array(n, type)
Allocate a size n array with structs or unions of the given type.
const struct GNUNET_DISK_FileHandle * fh
GNUnet file handle the event is about, matches sock, NULL if this is about a network socket or if no ...
const struct GNUNET_NETWORK_Handle * fd
GNUnet network socket the event is about, matches sock, NULL if this is about a file handle or if no ...
Buffer available for writing.
struct GNUNET_SCHEDULER_FdInfo * fds
Information about which FDs are ready for this task (and why).
Definition: scheduler.c:159
Data available for reading.
enum GNUNET_SCHEDULER_EventType et
Type of the event that was generated related to sock.
unsigned int fds_len
Size of the fds array.
Definition: scheduler.c:171
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◆ driver_add_multiple()

static void driver_add_multiple ( struct GNUNET_SCHEDULER_Task t)
static

calls the given function func on each FdInfo related to t.

Optionally updates the event type field in each FdInfo after calling func.

Parameters
tthe task
driver_functhe function to call with each FdInfo contained in in t
if_not_readyonly call driver_func on FdInfos that are not ready
etthe event type to be set in each FdInfo after calling driver_func on it, or -1 if no updating not desired.

Definition at line 900 of file scheduler.c.

References GNUNET_SCHEDULER_Driver::add, GNUNET_SCHEDULER_Driver::cls, GNUNET_SCHEDULER_FdInfo::et, GNUNET_SCHEDULER_Task::fds, GNUNET_SCHEDULER_Task::fds_len, GNUNET_ERROR_TYPE_ERROR, GNUNET_SCHEDULER_ET_NONE, GNUNET_YES, and LOG.

Referenced by add_without_sets(), and GNUNET_SCHEDULER_add_select().

901 {
902  struct GNUNET_SCHEDULER_FdInfo *fdi;
903  int success = GNUNET_YES;
904 
905  for (unsigned int i = 0; i != t->fds_len; ++i)
906  {
907  fdi = &t->fds[i];
909  t,
910  fdi) && success;
912  }
913  if (GNUNET_YES != success)
914  {
916  "driver could not add task\n");
917  }
918 }
Information about an event relating to a file descriptor/socket.
static const struct GNUNET_SCHEDULER_Driver * scheduler_driver
The driver used for the event loop.
Definition: scheduler.c:311
struct GNUNET_SCHEDULER_FdInfo * fds
Information about which FDs are ready for this task (and why).
Definition: scheduler.c:159
#define LOG(kind,...)
Definition: scheduler.c:31
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...
enum GNUNET_SCHEDULER_EventType et
Type of the event that was generated related to sock.
unsigned int fds_len
Size of the fds array.
Definition: scheduler.c:171
No event (useful for timeout).
void * cls
Closure to pass to the functions in this struct.
#define GNUNET_YES
Definition: gnunet_common.h:77
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◆ install_parent_control_handler()

static void install_parent_control_handler ( void *  cls)
static

Definition at line 922 of file scheduler.c.

References GNUNET_OS_install_parent_control_handler().

Referenced by GNUNET_SCHEDULER_driver_init().

923 {
924  (void) cls;
927 }
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:379
void GNUNET_OS_install_parent_control_handler(void *cls)
Connects this process to its parent via pipe; essentially, the parent control handler will read signa...
Definition: os_priority.c:141
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◆ shutdown_pipe_cb()

static void shutdown_pipe_cb ( void *  cls)
static

Definition at line 931 of file scheduler.c.

References GNUNET_assert, GNUNET_DISK_file_read(), GNUNET_DISK_handle_invalid(), GNUNET_DISK_PIPE_END_READ, GNUNET_DISK_pipe_handle(), GNUNET_SCHEDULER_add_read_file(), GNUNET_SCHEDULER_shutdown(), and GNUNET_TIME_UNIT_FOREVER_REL.

Referenced by GNUNET_SCHEDULER_driver_init().

932 {
933  char c;
934  const struct GNUNET_DISK_FileHandle *pr;
935 
936  (void) cls;
937  shutdown_pipe_task = NULL;
941  /* consume the signal */
942  GNUNET_DISK_file_read (pr, &c, sizeof(c));
943  /* mark all active tasks as ready due to shutdown */
947  pr,
949  NULL);
950 }
ssize_t GNUNET_DISK_file_read(const struct GNUNET_DISK_FileHandle *h, void *result, size_t len)
Read the contents of a binary file into a buffer.
Definition: disk.c:732
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
static struct GNUNET_DISK_PipeHandle * shutdown_pipe_handle
Pipe used to communicate shutdown via signal.
Definition: scheduler.c:621
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:1636
void GNUNET_SCHEDULER_shutdown()
Request the shutdown of a scheduler.
Definition: scheduler.c:526
int GNUNET_DISK_handle_invalid(const struct GNUNET_DISK_FileHandle *h)
Checks whether a handle is invalid.
Definition: disk.c:192
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:1753
#define GNUNET_TIME_UNIT_FOREVER_REL
Constant used to specify "forever".
The reading-end of a pipe.
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:385
static void shutdown_pipe_cb(void *cls)
Definition: scheduler.c:931
Handle used to access files (and pipes).
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◆ init_backtrace()

static void init_backtrace ( struct GNUNET_SCHEDULER_Task t)
static

Initialize backtrace data for task t.

Parameters
ttask to initialize

Definition at line 1032 of file scheduler.c.

References dump_backtrace().

Referenced by add_without_sets(), GNUNET_SCHEDULER_add_at_with_priority(), GNUNET_SCHEDULER_add_now_with_lifeness(), GNUNET_SCHEDULER_add_select(), GNUNET_SCHEDULER_add_shutdown(), and GNUNET_SCHEDULER_add_with_reason_and_priority().

1033 {
1034 #if EXECINFO
1035  void *backtrace_array[MAX_TRACE_DEPTH];
1036 
1037  t->num_backtrace_strings
1038  = backtrace (backtrace_array, MAX_TRACE_DEPTH);
1039  t->backtrace_strings =
1040  backtrace_symbols (backtrace_array,
1041  t->num_backtrace_strings);
1042  dump_backtrace (t);
1043 #else
1044  (void) t;
1045 #endif
1046 }
static void dump_backtrace(struct GNUNET_SCHEDULER_Task *t)
Output stack trace of task t.
Definition: scheduler.c:559
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◆ add_without_sets()

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 
)
static

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)

Parameters
delayhow long should we wait?
prioritypriority to use
rfdfile descriptor we want to read (can be -1)
wfdfile descriptors we want to write (can be -1)
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 1414 of file scheduler.c.

References GNUNET_SCHEDULER_Task::callback, GNUNET_SCHEDULER_Task::callback_cls, check_priority(), current_lifeness, current_priority, driver_add_multiple(), GNUNET_DISK_FileHandle::fd, GNUNET_assert, GNUNET_async_scope_get(), GNUNET_CONTAINER_DLL_insert, GNUNET_MAX, GNUNET_NETWORK_get_fd(), GNUNET_new, GNUNET_SCHEDULER_PRIORITY_KEEP, GNUNET_TIME_absolute_get(), GNUNET_TIME_relative_to_absolute(), init_backtrace(), init_fd_info(), GNUNET_SCHEDULER_Task::lifeness, max_priority_added, GNUNET_SCHEDULER_Task::priority, GNUNET_SCHEDULER_Task::scope, t, and GNUNET_SCHEDULER_Task::timeout.

Referenced by GNUNET_SCHEDULER_add_file_with_priority(), and GNUNET_SCHEDULER_add_net_with_priority().

1422 {
1423  struct GNUNET_SCHEDULER_Task *t;
1424 
1425  /* scheduler must be running */
1426  GNUNET_assert (NULL != scheduler_driver);
1427  GNUNET_assert (NULL != task);
1428  t = GNUNET_new (struct GNUNET_SCHEDULER_Task);
1430  init_fd_info (t,
1431  &read_nh,
1432  read_nh ? 1 : 0,
1433  &write_nh,
1434  write_nh ? 1 : 0,
1435  &read_fh,
1436  read_fh ? 1 : 0,
1437  &write_fh,
1438  write_fh ? 1 : 0);
1439  t->callback = task;
1440  t->callback_cls = task_cls;
1441 #if DEBUG_FDS
1442  check_fd (t, NULL != read_nh ? GNUNET_NETWORK_get_fd (read_nh) : -1);
1443  check_fd (t, NULL != write_nh ? GNUNET_NETWORK_get_fd (write_nh) : -1);
1444  check_fd (t, NULL != read_fh ? read_fh->fd : -1);
1445  check_fd (t, NULL != write_fh ? write_fh->fd : -1);
1446 #endif
1447 #if PROFILE_DELAYS
1448  t->start_time = GNUNET_TIME_absolute_get ();
1449 #endif
1455  pending_tail,
1456  t);
1457  driver_add_multiple (t);
1459  t->priority);
1460  init_backtrace (t);
1461  return t;
1462 }
int GNUNET_NETWORK_get_fd(const struct GNUNET_NETWORK_Handle *desc)
Return file descriptor for this network handle.
Definition: network.c:1080
#define GNUNET_CONTAINER_DLL_insert(head, tail, element)
Insert an element at the head of a DLL.
GNUNET_SCHEDULER_TaskCallback callback
Function to run when ready.
Definition: scheduler.c:149
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:246
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
static void init_backtrace(struct GNUNET_SCHEDULER_Task *t)
Initialize backtrace data for task t.
Definition: scheduler.c:1032
Run with the same priority as the current job.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
static struct GNUNET_SCHEDULER_Task * pending_head
Head of list of tasks waiting for an event.
Definition: scheduler.c:316
static struct GNUNET_SCHEDULER_Task * t
Main task.
static struct GNUNET_SCHEDULER_Task * pending_tail
Tail of list of tasks waiting for an event.
Definition: scheduler.c:321
#define GNUNET_MAX(a, b)
Definition: gnunet_common.h:82
static int current_lifeness
Value of the &#39;lifeness&#39; flag for the current task.
Definition: scheduler.c:407
static void driver_add_multiple(struct GNUNET_SCHEDULER_Task *t)
calls the given function func on each FdInfo related to t.
Definition: scheduler.c:900
static const struct GNUNET_SCHEDULER_Driver * scheduler_driver
The driver used for the event loop.
Definition: scheduler.c:311
void GNUNET_async_scope_get(struct GNUNET_AsyncScopeSave *scope_ret)
Get the current async scope.
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_get(void)
Get the current time.
Definition: time.c:118
void * callback_cls
Closure for the callback.
Definition: scheduler.c:154
static enum GNUNET_SCHEDULER_Priority current_priority
Priority of the task running right now.
Definition: scheduler.c:396
static enum GNUNET_SCHEDULER_Priority max_priority_added
Priority of the highest task added in the current select iteration.
Definition: scheduler.c:402
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:449
Entry in list of pending tasks.
Definition: scheduler.c:134
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:782
struct GNUNET_TIME_Absolute timeout
Absolute timeout value for the task, or GNUNET_TIME_UNIT_FOREVER_ABS for "no timeout".
Definition: scheduler.c:184
enum GNUNET_SCHEDULER_Priority priority
Task priority.
Definition: scheduler.c:203
int fd
File handle on Unix-like systems.
struct GNUNET_AsyncScopeSave scope
Asynchronous scope of the task that scheduled this scope,.
Definition: scheduler.c:247
int lifeness
Should the existence of this task in the queue be counted as reason to not shutdown the scheduler...
Definition: scheduler.c:219
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◆ extract_handles()

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 at line 1728 of file scheduler.c.

References GNUNET_array_append, GNUNET_assert, GNUNET_DISK_get_handle_from_int_fd(), GNUNET_NETWORK_fdset_test_native(), GNUNET_NETWORK_socket_box_native(), GNUNET_YES, and GNUNET_NETWORK_FDSet::nsds.

Referenced by GNUNET_SCHEDULER_add_select().

1733 {
1734  // FIXME: this implementation only works for unix, for WIN32 the file handles
1735  // in fdset must be handled separately
1736  const struct GNUNET_NETWORK_Handle **nhandles;
1737  const struct GNUNET_DISK_FileHandle **fhandles;
1738  unsigned int nhandles_len;
1739  unsigned int fhandles_len;
1740 
1741  nhandles = NULL;
1742  fhandles = NULL;
1743  nhandles_len = 0;
1744  fhandles_len = 0;
1745  for (int sock = 0; sock != fdset->nsds; ++sock)
1746  {
1747  if (GNUNET_YES == GNUNET_NETWORK_fdset_test_native (fdset, sock))
1748  {
1749  struct GNUNET_NETWORK_Handle *nhandle;
1750  struct GNUNET_DISK_FileHandle *fhandle;
1751 
1752  nhandle = GNUNET_NETWORK_socket_box_native (sock);
1753  if (NULL != nhandle)
1754  {
1755  GNUNET_array_append (nhandles, nhandles_len, nhandle);
1756  }
1757  else
1758  {
1759  fhandle = GNUNET_DISK_get_handle_from_int_fd (sock);
1760  if (NULL != fhandle)
1761  {
1762  GNUNET_array_append (fhandles, fhandles_len, fhandle);
1763  }
1764  else
1765  {
1766  GNUNET_assert (0);
1767  }
1768  }
1769  }
1770  }
1771  *ntarget = nhandles_len > 0 ? nhandles : NULL;
1772  *ftarget = fhandles_len > 0 ? fhandles : NULL;
1773  *extracted_nhandles = nhandles_len;
1774  *extracted_fhandles = fhandles_len;
1775 }
int nsds
Maximum number of any socket descriptor in the set (plus one)
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
int GNUNET_NETWORK_fdset_test_native(const struct GNUNET_NETWORK_FDSet *to, int nfd)
Test native fd in a set.
Definition: network.c:1155
#define GNUNET_array_append(arr, size, element)
Append an element to a list (growing the list by one).
struct GNUNET_DISK_FileHandle * GNUNET_DISK_get_handle_from_int_fd(int fno)
Get a handle from a native integer FD.
Definition: disk.c:1375
handle to a socket
Definition: network.c:52
#define GNUNET_YES
Definition: gnunet_common.h:77
struct GNUNET_NETWORK_Handle * GNUNET_NETWORK_socket_box_native(int fd)
Box a native socket (and check that it is a socket).
Definition: network.c:636
Handle used to access files (and pipes).
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◆ select_add()

static int select_add ( void *  cls,
struct GNUNET_SCHEDULER_Task task,
struct GNUNET_SCHEDULER_FdInfo fdi 
)
static

Definition at line 2419 of file scheduler.c.

References GNUNET_SCHEDULER_FdInfo::et, Scheduled::et, GNUNET_SCHEDULER_FdInfo::fd, Scheduled::fdi, GNUNET_SCHEDULER_FdInfo::fh, GNUNET_assert, GNUNET_CONTAINER_DLL_insert, GNUNET_new, GNUNET_OK, GNUNET_SCHEDULER_ET_IN, GNUNET_SCHEDULER_ET_OUT, GNUNET_SYSERR, DriverContext::scheduled_head, DriverContext::scheduled_tail, GNUNET_SCHEDULER_FdInfo::sock, and Scheduled::task.

Referenced by GNUNET_SCHEDULER_driver_select().

2422 {
2423  struct DriverContext *context = cls;
2424 
2425  GNUNET_assert (NULL != context);
2426  GNUNET_assert (NULL != task);
2427  GNUNET_assert (NULL != fdi);
2428  GNUNET_assert (0 != (GNUNET_SCHEDULER_ET_IN & fdi->et) ||
2429  0 != (GNUNET_SCHEDULER_ET_OUT & fdi->et));
2430 
2431  if (! ((NULL != fdi->fd) ^ (NULL != fdi->fh)) || (fdi->sock < 0))
2432  {
2433  /* exactly one out of {fd, hf} must be != NULL and the OS handle must be valid */
2434  return GNUNET_SYSERR;
2435  }
2436 
2437  struct Scheduled *scheduled = GNUNET_new (struct Scheduled);
2438  scheduled->task = task;
2439  scheduled->fdi = fdi;
2440  scheduled->et = fdi->et;
2441 
2443  context->scheduled_tail,
2444  scheduled);
2445  return GNUNET_OK;
2446 }
#define GNUNET_CONTAINER_DLL_insert(head, tail, element)
Insert an element at the head of a DLL.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
#define GNUNET_new(type)
Allocate a struct or union of the given type.
struct Scheduled * scheduled_head
the head of a DLL containing information about the events the select driver is waiting for ...
Definition: scheduler.c:288
static pa_context * context
Pulseaudio context.
Driver context used by GNUNET_SCHEDULER_run.
Definition: scheduler.c:282
struct GNUNET_SCHEDULER_FdInfo * fdi
information about the network socket / file descriptor where the event is expected to occur ...
Definition: scheduler.c:269
int sock
Underlying OS handle the event was about.
const struct GNUNET_DISK_FileHandle * fh
GNUnet file handle the event is about, matches sock, NULL if this is about a network socket or if no ...
const struct GNUNET_NETWORK_Handle * fd
GNUnet network socket the event is about, matches sock, NULL if this is about a file handle or if no ...
A struct representing an event the select driver is waiting for.
Definition: scheduler.c:254
Buffer available for writing.
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
Data available for reading.
enum GNUNET_SCHEDULER_EventType et
Type of the event that was generated related to sock.
struct Scheduled * scheduled_tail
the tail of a DLL containing information about the events the select driver is waiting for ...
Definition: scheduler.c:294
struct GNUNET_SCHEDULER_Task * task
the task, the event is related to
Definition: scheduler.c:263
enum GNUNET_SCHEDULER_EventType et
the event types (multiple event types can be ORed) the select driver is expected to wait for ...
Definition: scheduler.c:275
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◆ select_del()

static int select_del ( void *  cls,
struct GNUNET_SCHEDULER_Task task 
)
static

Definition at line 2450 of file scheduler.c.

References context, GNUNET_assert, GNUNET_CONTAINER_DLL_remove, GNUNET_free, GNUNET_OK, GNUNET_SYSERR, Scheduled::next, ret, DriverContext::scheduled_head, DriverContext::scheduled_tail, and Scheduled::task.

Referenced by GNUNET_SCHEDULER_driver_select().

2452 {
2453  struct DriverContext *context;
2454  struct Scheduled *pos;
2455  int ret;
2456 
2457  GNUNET_assert (NULL != cls);
2458 
2459  context = cls;
2460  ret = GNUNET_SYSERR;
2461  pos = context->scheduled_head;
2462  while (NULL != pos)
2463  {
2464  struct Scheduled *next = pos->next;
2465  if (pos->task == task)
2466  {
2468  context->scheduled_tail,
2469  pos);
2470  GNUNET_free (pos);
2471  ret = GNUNET_OK;
2472  }
2473  pos = next;
2474  }
2475  return ret;
2476 }
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
static int ret
Return value of the commandline.
Definition: gnunet-abd.c:81
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
struct Scheduled * scheduled_head
the head of a DLL containing information about the events the select driver is waiting for ...
Definition: scheduler.c:288
static pa_context * context
Pulseaudio context.
Driver context used by GNUNET_SCHEDULER_run.
Definition: scheduler.c:282
A struct representing an event the select driver is waiting for.
Definition: scheduler.c:254
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
struct Scheduled * scheduled_tail
the tail of a DLL containing information about the events the select driver is waiting for ...
Definition: scheduler.c:294
struct GNUNET_SCHEDULER_Task * task
the task, the event is related to
Definition: scheduler.c:263
struct Scheduled * next
Definition: scheduler.c:258
#define GNUNET_free(ptr)
Wrapper around free.
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◆ select_set_wakeup()

static void select_set_wakeup ( void *  cls,
struct GNUNET_TIME_Absolute  dt 
)
static

Definition at line 2480 of file scheduler.c.

References GNUNET_assert, and DriverContext::timeout.

Referenced by GNUNET_SCHEDULER_driver_select().

2482 {
2483  struct DriverContext *context = cls;
2484 
2485  GNUNET_assert (NULL != context);
2486  context->timeout = dt;
2487 }
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
static pa_context * context
Pulseaudio context.
Driver context used by GNUNET_SCHEDULER_run.
Definition: scheduler.c:282
struct GNUNET_TIME_Absolute timeout
the time when the select driver will wake up again (after calling select)
Definition: scheduler.c:300
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Variable Documentation

◆ scheduler_driver

const struct GNUNET_SCHEDULER_Driver* scheduler_driver
static

The driver used for the event loop.

Will be handed over to the scheduler in GNUNET_SCHEDULER_do_work(), persisted there in this variable for later use in functions like GNUNET_SCHEDULER_add_select(), add_without_sets() and GNUNET_SCHEDULER_cancel().

Definition at line 311 of file scheduler.c.

◆ pending_head

struct GNUNET_SCHEDULER_Task* pending_head
static

Head of list of tasks waiting for an event.

Definition at line 316 of file scheduler.c.

Referenced by GNUNET_SCHEDULER_do_work().

◆ pending_tail

struct GNUNET_SCHEDULER_Task* pending_tail
static

Tail of list of tasks waiting for an event.

Definition at line 321 of file scheduler.c.

◆ shutdown_head

struct GNUNET_SCHEDULER_Task* shutdown_head
static

Head of list of tasks waiting for shutdown.

Definition at line 326 of file scheduler.c.

◆ shutdown_tail

struct GNUNET_SCHEDULER_Task* shutdown_tail
static

Tail of list of tasks waiting for shutdown.

Definition at line 331 of file scheduler.c.

◆ pending_timeout_head

struct GNUNET_SCHEDULER_Task* pending_timeout_head
static

List of tasks waiting ONLY for a timeout event.

Sorted by timeout (earliest first). Used so that we do not traverse the list of these tasks when building select sets (we just look at the head to determine the respective timeout ONCE).

Definition at line 340 of file scheduler.c.

Referenced by get_timeout(), GNUNET_SCHEDULER_add_at_with_priority(), and GNUNET_SCHEDULER_do_work().

◆ pending_timeout_tail

struct GNUNET_SCHEDULER_Task* pending_timeout_tail
static

List of tasks waiting ONLY for a timeout event.

Sorted by timeout (earliest first). Used so that we do not traverse the list of these tasks when building select sets (we just look at the head to determine the respective timeout ONCE).

Definition at line 349 of file scheduler.c.

◆ pending_timeout_last

struct GNUNET_SCHEDULER_Task* pending_timeout_last
static

Last inserted task waiting ONLY for a timeout event.

Used to (heuristically) speed up insertion.

Definition at line 355 of file scheduler.c.

Referenced by GNUNET_SCHEDULER_add_at_with_priority().

◆ active_task

struct GNUNET_SCHEDULER_Task* active_task
static

ID of the task that is running right now.

Definition at line 360 of file scheduler.c.

◆ ready_head

Head of list of tasks ready to run right now, grouped by importance.

Definition at line 365 of file scheduler.c.

◆ ready_tail

Tail of list of tasks ready to run right now, grouped by importance.

Definition at line 371 of file scheduler.c.

◆ install_parent_control_task

struct GNUNET_SCHEDULER_Task* install_parent_control_task
static

Task for installing parent control handlers (it might happen that the scheduler is shutdown before this task is executed, so GNUNET_SCHEDULER_shutdown must cancel it in that case)

Definition at line 379 of file scheduler.c.

◆ shutdown_pipe_task

struct GNUNET_SCHEDULER_Task* shutdown_pipe_task
static

Task for reading from a pipe that signal handlers will use to initiate shutdown.

Definition at line 385 of file scheduler.c.

◆ ready_count

unsigned int ready_count
static

Number of tasks on the ready list.

Definition at line 390 of file scheduler.c.

Referenced by GNUNET_SCHEDULER_cancel(), GNUNET_SCHEDULER_do_work(), GNUNET_SCHEDULER_get_load(), queue_ready_task(), and shutdown_if_no_lifeness().

◆ current_priority

enum GNUNET_SCHEDULER_Priority current_priority
static

Priority of the task running right now.

Only valid while a task is running.

Definition at line 396 of file scheduler.c.

Referenced by add_without_sets(), GNUNET_SCHEDULER_add_select(), GNUNET_SCHEDULER_do_work(), GNUNET_SCHEDULER_driver_init(), and GNUNET_SCHEDULER_get_load().

◆ max_priority_added

enum GNUNET_SCHEDULER_Priority max_priority_added
static

Priority of the highest task added in the current select iteration.

Definition at line 402 of file scheduler.c.

Referenced by add_without_sets(), GNUNET_SCHEDULER_add_select(), and GNUNET_SCHEDULER_do_work().

◆ current_lifeness

int current_lifeness
static

◆ scheduler_select

GNUNET_SCHEDULER_select scheduler_select
static

Function to use as a select() in the scheduler.

If NULL, we use GNUNET_NETWORK_socket_select().

Definition at line 413 of file scheduler.c.

Referenced by GNUNET_SCHEDULER_set_select(), and select_loop().

◆ tc

struct GNUNET_SCHEDULER_TaskContext tc
static

Task context of the current task.

Definition at line 418 of file scheduler.c.

Referenced by add_to_tc(), check_add_address(), check_add_queue_message(), check_client_send(), check_communicator_available(), check_incoming_msg(), child_death_task(), client_connect_cb(), client_disconnect_cb(), client_send_response(), cmd_read(), connect_probe_continuation(), cores_send_connect_info(), cores_send_disconnect_info(), do_blacklist_check(), do_read(), do_s5r_read(), do_udp_read(), free_address_list_entry(), free_pending_message(), free_queue(), GNUNET_SCHEDULER_do_work(), GNUNET_SCHEDULER_get_task_context(), GST_blacklist_test_allowed(), GST_clients_broadcast(), GST_clients_broadcast_peer_notification(), handle_add_address(), handle_add_queue_message(), handle_backchannel_encapsulation(), handle_client_address_to_string(), handle_client_blacklist_init(), handle_client_blacklist_reply(), handle_client_hello(), handle_client_monitor_peers(), handle_client_monitor_plugins(), handle_client_recv_ok(), handle_client_send(), handle_client_set_metric(), handle_client_start(), handle_communicator_available(), handle_communicator_backchannel(), handle_del_address(), handle_del_queue_message(), handle_incoming_msg(), handle_monitor_start(), handle_queue_create_fail(), handle_queue_create_ok(), handle_raw_message(), handle_request_hello_validation(), handle_send_message_ack(), handle_suggest(), handle_suggest_cancel(), lookup_communicator(), maint_child_death(), mark_match_down(), migrate_and_drop_keywords(), migrate_and_drop_metadata(), notify_client_about_neighbour(), notify_client_connect_info(), notify_client_queues(), notify_monitors(), process_listen_socket(), read_dns4(), read_dns6(), read_response(), receive_ready(), remove_high_frequency_keywords(), stop_peer_request(), suggest_to_connect(), tcp_send(), tokenized_cb(), transmit_kx(), transmit_ready(), udp_plugin_select_v4(), udp_plugin_select_v6(), unix_plugin_select_read(), and unix_plugin_select_write().

◆ scheduler_select_cls

void* scheduler_select_cls
static

Closure for scheduler_select.

Definition at line 423 of file scheduler.c.

Referenced by GNUNET_SCHEDULER_set_select(), and select_loop().

◆ shutdown_pipe_handle

struct GNUNET_DISK_PipeHandle* shutdown_pipe_handle
static

Pipe used to communicate shutdown via signal.

Definition at line 621 of file scheduler.c.

◆ my_pid

pid_t my_pid
static

Process ID of this process at the time we installed the various signal handlers.

Definition at line 627 of file scheduler.c.

Referenced by GNUNET_SCHEDULER_driver_init(), and sighandler_shutdown().