GNUnet  0.10.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)   GNUNET_log_from_strerror (kind, "util-scheduler", 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 
)    GNUNET_log_from_strerror (kind, "util-scheduler", syscall)

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 65 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 71 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 448 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().

449 {
450  if ((p >= 0) && (p < GNUNET_SCHEDULER_PRIORITY_COUNT))
451  return p;
452  GNUNET_assert (0);
453  return 0; /* make compiler happy */
454 }
#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 463 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().

464 {
465  struct GNUNET_SCHEDULER_Task *pos;
466  struct GNUNET_TIME_Absolute now;
468 
469  pos = pending_timeout_head;
470  now = GNUNET_TIME_absolute_get ();
472  if (NULL != pos)
473  {
474  if (0 != pos->reason)
475  {
476  return now;
477  }
478  else
479  {
480  timeout = pos->timeout;
481  }
482  }
483  for (pos = pending_head; NULL != pos; pos = pos->next)
484  {
485  if (0 != pos->reason)
486  {
487  return now;
488  }
489  else if ((pos->timeout.abs_value_us != GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us) &&
490  (timeout.abs_value_us > pos->timeout.abs_value_us))
491  {
492  timeout = pos->timeout;
493  }
494  }
495  return timeout;
496 }
static struct GNUNET_SCHEDULER_Task * pending_head
Head of list of tasks waiting for an event.
Definition: scheduler.c:317
#define GNUNET_TIME_UNIT_FOREVER_ABS
Constant used to specify "forever".
static struct GNUNET_TIME_Relative timeout
User defined timestamp for completing operations.
Definition: gnunet-arm.c:114
static struct GNUNET_SCHEDULER_Task * pending_timeout_head
List of tasks waiting ONLY for a timeout event.
Definition: scheduler.c:341
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 505 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().

506 {
508 
510  ready_tail[p],
511  task);
512  task->in_ready_list = GNUNET_YES;
513  ready_count++;
514 }
static unsigned int ready_count
Number of tasks on the ready list.
Definition: scheduler.c:389
#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:366
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:448
#define GNUNET_YES
Definition: gnunet_common.h:80
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 557 of file scheduler.c.

References GNUNET_ERROR_TYPE_WARNING, and LOG.

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

558 {
559 #if EXECINFO
560  for (unsigned int i = 0; i < t->num_backtrace_strings; i++)
562  "Task %p trace %u: %s\n",
563  t,
564  i,
565  t->backtrace_strings[i]);
566 #else
567  (void) t;
568 #endif
569 }
#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 578 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().

579 {
580  unsigned int i;
581 
583  "destroying task %p\n",
584  t);
585 
586  if (GNUNET_YES == t->own_handles)
587  {
588  for (i = 0; i != t->fds_len; ++i)
589  {
590  const struct GNUNET_NETWORK_Handle *fd = t->fds[i].fd;
591  const struct GNUNET_DISK_FileHandle *fh = t->fds[i].fh;
592  if (fd)
593  {
595  }
596  if (fh)
597  {
598  // FIXME: on WIN32 this is not enough! A function
599  // GNUNET_DISK_file_free_memory_only would be nice
600  GNUNET_free ((void *) fh);
601  }
602  }
603  }
604  if (t->fds_len > 1)
605  {
606  GNUNET_array_grow (t->fds, t->fds_len, 0);
607  }
608 #if EXECINFO
609  GNUNET_free (t->backtrace_strings);
610 #endif
611  GNUNET_free (t);
612 }
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:680
#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:46
#define GNUNET_YES
Definition: gnunet_common.h:80
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 631 of file scheduler.c.

Referenced by GNUNET_SCHEDULER_driver_init().

632 {
633  return;
634 }
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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 660 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().

661 {
662  static char c;
663  int old_errno = errno; /* backup errno */
664 
665  if (getpid () != my_pid)
666  _exit (1); /* we have fork'ed since the signal handler was created,
667  * ignore the signal, see https://gnunet.org/vfork discussion */
670  &c, sizeof (c));
671  errno = old_errno;
672 }
static pid_t my_pid
Process ID of this process at the time we installed the various signal handlers.
Definition: scheduler.c:624
static struct GNUNET_DISK_PipeHandle * shutdown_pipe_handle
Pipe used to communicate shutdown via signal.
Definition: scheduler.c:618
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:2641
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:1049
The writing-end of a pipe.
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◆ shutdown_if_no_lifeness()

static void shutdown_if_no_lifeness ( )
static

Definition at line 676 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().

677 {
678  struct GNUNET_SCHEDULER_Task *t;
679 
680  if (ready_count > 0)
681  return;
682  for (t = pending_head; NULL != t; t = t->next)
683  if (GNUNET_YES == t->lifeness)
684  return;
685  for (t = shutdown_head; NULL != t; t = t->next)
686  if (GNUNET_YES == t->lifeness)
687  return;
688  for (t = pending_timeout_head; NULL != t; t = t->next)
689  if (GNUNET_YES == t->lifeness)
690  return;
691  /* No lifeness! */
693 }
static unsigned int ready_count
Number of tasks on the ready list.
Definition: scheduler.c:389
static struct GNUNET_SCHEDULER_Task * pending_head
Head of list of tasks waiting for an event.
Definition: scheduler.c:317
static struct GNUNET_SCHEDULER_Task * t
Main task.
void GNUNET_SCHEDULER_shutdown()
Request the shutdown of a scheduler.
Definition: scheduler.c:524
static struct GNUNET_SCHEDULER_Task * pending_timeout_head
List of tasks waiting ONLY for a timeout event.
Definition: scheduler.c:341
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:80
static struct GNUNET_SCHEDULER_Task * shutdown_head
Head of list of tasks waiting for shutdown.
Definition: scheduler.c:327
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 2303 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().

2305 {
2306  struct GNUNET_NETWORK_FDSet *rs;
2307  struct GNUNET_NETWORK_FDSet *ws;
2308  int select_result;
2309 
2310  GNUNET_assert (NULL != context);
2313  while ( (NULL != context->scheduled_head) ||
2314  (GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us != context->timeout.abs_value_us) )
2315  {
2317  "select timeout = %s\n",
2319 
2322 
2323  for (struct Scheduled *pos = context->scheduled_head;
2324  NULL != pos;
2325  pos = pos->next)
2326  {
2327  if (0 != (GNUNET_SCHEDULER_ET_IN & pos->et))
2328  {
2329  GNUNET_NETWORK_fdset_set_native (rs, pos->fdi->sock);
2330  }
2331  if (0 != (GNUNET_SCHEDULER_ET_OUT & pos->et))
2332  {
2333  GNUNET_NETWORK_fdset_set_native (ws, pos->fdi->sock);
2334  }
2335  }
2336  struct GNUNET_TIME_Relative time_remaining =
2338  if (NULL == scheduler_select)
2339  {
2340  select_result = GNUNET_NETWORK_socket_select (rs,
2341  ws,
2342  NULL,
2343  time_remaining);
2344  }
2345  else
2346  {
2347  select_result = scheduler_select (scheduler_select_cls,
2348  rs,
2349  ws,
2350  NULL,
2351  time_remaining);
2352  }
2353  if (select_result == GNUNET_SYSERR)
2354  {
2355  if (errno == EINTR)
2356  continue;
2357 
2359  "select");
2360 #ifndef MINGW
2361 #if USE_LSOF
2362  char lsof[512];
2363 
2364  snprintf (lsof,
2365  sizeof (lsof),
2366  "lsof -p %d",
2367  getpid ());
2368  (void) close (1);
2369  (void) dup2 (2, 1);
2370  if (0 != system (lsof))
2372  "system");
2373 #endif
2374 #endif
2375 #if DEBUG_FDS
2376  for (struct Scheduled *s = context->scheduled_head;
2377  NULL != s;
2378  s = s->next)
2379  {
2380  int flags = fcntl (s->fdi->sock,
2381  F_GETFD);
2382 
2383  if ( (flags == -1) &&
2384  (EBADF == errno) )
2385  {
2387  "Got invalid file descriptor %d!\n",
2388  s->fdi->sock);
2389 #if EXECINFO
2390  dump_backtrace (s->task);
2391 #endif
2392  }
2393  }
2394 #endif
2395  GNUNET_assert (0);
2398  return GNUNET_SYSERR;
2399  }
2400  if (select_result > 0)
2401  {
2402  for (struct Scheduled *pos = context->scheduled_head;
2403  NULL != pos;
2404  pos = pos->next)
2405  {
2406  int is_ready = GNUNET_NO;
2407 
2408  if (0 != (GNUNET_SCHEDULER_ET_IN & pos->et) &&
2409  GNUNET_YES ==
2411  pos->fdi->sock))
2412  {
2413  pos->fdi->et |= GNUNET_SCHEDULER_ET_IN;
2414  is_ready = GNUNET_YES;
2415  }
2416  if (0 != (GNUNET_SCHEDULER_ET_OUT & pos->et) &&
2417  GNUNET_YES ==
2419  pos->fdi->sock))
2420  {
2421  pos->fdi->et |= GNUNET_SCHEDULER_ET_OUT;
2422  is_ready = GNUNET_YES;
2423  }
2424  if (GNUNET_YES == is_ready)
2425  {
2426  GNUNET_SCHEDULER_task_ready (pos->task,
2427  pos->fdi);
2428  }
2429  }
2430  }
2432  {
2434  "scheduler has more tasks ready!\n");
2435  }
2436  }
2439  return GNUNET_OK;
2440 }
void GNUNET_NETWORK_fdset_set_native(struct GNUNET_NETWORK_FDSet *to, int nfd)
Set a native fd in a set.
Definition: network.c:1325
#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:412
int GNUNET_NETWORK_fdset_test_native(const struct GNUNET_NETWORK_FDSet *to, int nfd)
Test native fd in a set.
Definition: network.c:1343
#define GNUNET_NO
Definition: gnunet_common.h:81
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:78
struct Scheduled * scheduled_head
the head of a DLL containing information about the events the select driver is waiting for ...
Definition: scheduler.c:289
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:1554
struct GNUNET_NETWORK_FDSet * GNUNET_NETWORK_fdset_create(void)
Creates an fd set.
Definition: network.c:1538
collection of IO descriptors
A struct representing an event the select driver is waiting for.
Definition: scheduler.c:255
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:1812
#define GNUNET_SYSERR
Definition: gnunet_common.h:79
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:1146
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:1992
struct GNUNET_TIME_Absolute timeout
the time when the select driver will wake up again (after calling select)
Definition: scheduler.c:301
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:80
static void dump_backtrace(struct GNUNET_SCHEDULER_Task *t)
Output stack trace of task t.
Definition: scheduler.c:557
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:1947
const char * GNUNET_STRINGS_absolute_time_to_string(struct GNUNET_TIME_Absolute t)
Like asctime, except for GNUnet time.
Definition: strings.c:792
struct Scheduled * next
Definition: scheduler.c:259
static void * scheduler_select_cls
Closure for scheduler_select.
Definition: scheduler.c:422
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 781 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().

790 {
791  // FIXME: if we have exactly two network handles / exactly two file handles
792  // and they are equal, we can make one FdInfo with both
793  // GNUNET_SCHEDULER_ET_IN and GNUNET_SCHEDULER_ET_OUT set.
794  struct GNUNET_SCHEDULER_FdInfo *fdi;
795 
796  t->fds_len = read_nh_len + write_nh_len + read_fh_len + write_fh_len;
797  if (1 == t->fds_len)
798  {
799  fdi = &t->fdx;
800  t->fds = fdi;
801  if (1 == read_nh_len)
802  {
803  GNUNET_assert (NULL != read_nh);
804  GNUNET_assert (NULL != *read_nh);
805  fdi->fd = *read_nh;
806  fdi->et = GNUNET_SCHEDULER_ET_IN;
807  fdi->sock = GNUNET_NETWORK_get_fd (*read_nh);
808  t->read_fd = fdi->sock;
809  t->write_fd = -1;
810  }
811  else if (1 == write_nh_len)
812  {
813  GNUNET_assert (NULL != write_nh);
814  GNUNET_assert (NULL != *write_nh);
815  fdi->fd = *write_nh;
817  fdi->sock = GNUNET_NETWORK_get_fd (*write_nh);
818  t->read_fd = -1;
819  t->write_fd = fdi->sock;
820  }
821  else if (1 == read_fh_len)
822  {
823  GNUNET_assert (NULL != read_fh);
824  GNUNET_assert (NULL != *read_fh);
825  fdi->fh = *read_fh;
826  fdi->et = GNUNET_SCHEDULER_ET_IN;
827  fdi->sock = (*read_fh)->fd; // FIXME: does not work under WIN32
828  t->read_fd = fdi->sock;
829  t->write_fd = -1;
830  }
831  else
832  {
833  GNUNET_assert (NULL != write_fh);
834  GNUNET_assert (NULL != *write_fh);
835  fdi->fh = *write_fh;
837  fdi->sock = (*write_fh)->fd; // FIXME: does not work under WIN32
838  t->read_fd = -1;
839  t->write_fd = fdi->sock;
840  }
841  }
842  else
843  {
845  t->fds = fdi;
846  t->read_fd = -1;
847  t->write_fd = -1;
848  unsigned int i;
849  for (i = 0; i != read_nh_len; ++i)
850  {
851  fdi->fd = read_nh[i];
852  GNUNET_assert (NULL != fdi->fd);
853  fdi->et = GNUNET_SCHEDULER_ET_IN;
854  fdi->sock = GNUNET_NETWORK_get_fd (read_nh[i]);
855  ++fdi;
856  }
857  for (i = 0; i != write_nh_len; ++i)
858  {
859  fdi->fd = write_nh[i];
860  GNUNET_assert (NULL != fdi->fd);
862  fdi->sock = GNUNET_NETWORK_get_fd (write_nh[i]);
863  ++fdi;
864  }
865  for (i = 0; i != read_fh_len; ++i)
866  {
867  fdi->fh = read_fh[i];
868  GNUNET_assert (NULL != fdi->fh);
869  fdi->et = GNUNET_SCHEDULER_ET_IN;
870  fdi->sock = (read_fh[i])->fd; // FIXME: does not work under WIN32
871  ++fdi;
872  }
873  for (i = 0; i != write_fh_len; ++i)
874  {
875  fdi->fh = write_fh[i];
876  GNUNET_assert (NULL != fdi->fh);
878  fdi->sock = (write_fh[i])->fd; // FIXME: does not work under WIN32
879  ++fdi;
880  }
881  }
882 }
int GNUNET_NETWORK_get_fd(const struct GNUNET_NETWORK_Handle *desc)
Return file descriptor for this network handle.
Definition: network.c:1268
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 899 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().

900 {
901  struct GNUNET_SCHEDULER_FdInfo *fdi;
902  int success = GNUNET_YES;
903 
904  for (unsigned int i = 0; i != t->fds_len; ++i)
905  {
906  fdi = &t->fds[i];
908  t,
909  fdi) && success;
911  }
912  if (GNUNET_YES != success)
913  {
915  "driver could not add task\n");
916  }
917 }
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:312
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:80
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◆ install_parent_control_handler()

static void install_parent_control_handler ( void *  cls)
static

Definition at line 921 of file scheduler.c.

References GNUNET_OS_install_parent_control_handler().

Referenced by GNUNET_SCHEDULER_driver_init().

922 {
923  (void) cls;
926 }
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:378
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:150
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◆ shutdown_pipe_cb()

static void shutdown_pipe_cb ( void *  cls)
static

Definition at line 930 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().

931 {
932  char c;
933  const struct GNUNET_DISK_FileHandle *pr;
934 
935  (void) cls;
936  shutdown_pipe_task = NULL;
940  /* consume the signal */
941  GNUNET_DISK_file_read (pr, &c, sizeof (c));
942  /* mark all active tasks as ready due to shutdown */
946  pr,
948  NULL);
949 }
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:881
#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:618
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:1643
void GNUNET_SCHEDULER_shutdown()
Request the shutdown of a scheduler.
Definition: scheduler.c:524
int GNUNET_DISK_handle_invalid(const struct GNUNET_DISK_FileHandle *h)
Checks whether a handle is invalid.
Definition: disk.c:191
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:2641
#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:384
static void shutdown_pipe_cb(void *cls)
Definition: scheduler.c:930
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 1031 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().

1032 {
1033 #if EXECINFO
1034  void *backtrace_array[MAX_TRACE_DEPTH];
1035 
1036  t->num_backtrace_strings
1037  = backtrace (backtrace_array, MAX_TRACE_DEPTH);
1038  t->backtrace_strings =
1039  backtrace_symbols (backtrace_array,
1040  t->num_backtrace_strings);
1041  dump_backtrace (t);
1042 #else
1043  (void) t;
1044 #endif
1045 }
static void dump_backtrace(struct GNUNET_SCHEDULER_Task *t)
Output stack trace of task t.
Definition: scheduler.c:557
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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 1406 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().

1414 {
1415  struct GNUNET_SCHEDULER_Task *t;
1416 
1417  /* scheduler must be running */
1418  GNUNET_assert (NULL != scheduler_driver);
1419  GNUNET_assert (NULL != task);
1420  t = GNUNET_new (struct GNUNET_SCHEDULER_Task);
1422  init_fd_info (t,
1423  &read_nh,
1424  read_nh ? 1 : 0,
1425  &write_nh,
1426  write_nh ? 1 : 0,
1427  &read_fh,
1428  read_fh ? 1 : 0,
1429  &write_fh,
1430  write_fh ? 1 : 0);
1431  t->callback = task;
1432  t->callback_cls = task_cls;
1433 #if DEBUG_FDS
1434  check_fd (t, NULL != read_nh ? GNUNET_NETWORK_get_fd (read_nh) : -1);
1435  check_fd (t, NULL != write_nh ? GNUNET_NETWORK_get_fd (write_nh) : -1);
1436  check_fd (t, NULL != read_fh ? read_fh->fd : -1);
1437  check_fd (t, NULL != write_fh ? write_fh->fd : -1);
1438 #endif
1439 #if PROFILE_DELAYS
1440  t->start_time = GNUNET_TIME_absolute_get ();
1441 #endif
1446  pending_tail,
1447  t);
1448  driver_add_multiple (t);
1450  t->priority);
1451  init_backtrace (t);
1452  return t;
1453 }
int GNUNET_NETWORK_get_fd(const struct GNUNET_NETWORK_Handle *desc)
Return file descriptor for this network handle.
Definition: network.c:1268
#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:245
#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:1031
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:317
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:322
#define GNUNET_MAX(a, b)
Definition: gnunet_common.h:85
static int current_lifeness
Value of the &#39;lifeness&#39; flag for the current task.
Definition: scheduler.c:406
static void driver_add_multiple(struct GNUNET_SCHEDULER_Task *t)
calls the given function func on each FdInfo related to t.
Definition: scheduler.c:899
static const struct GNUNET_SCHEDULER_Driver * scheduler_driver
The driver used for the event loop.
Definition: scheduler.c:312
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:395
static enum GNUNET_SCHEDULER_Priority max_priority_added
Priority of the highest task added in the current select iteration.
Definition: scheduler.c:401
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:448
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:781
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 other OSes.
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 1747 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().

1752 {
1753  // FIXME: this implementation only works for unix, for WIN32 the file handles
1754  // in fdset must be handled separately
1755  const struct GNUNET_NETWORK_Handle **nhandles;
1756  const struct GNUNET_DISK_FileHandle **fhandles;
1757  unsigned int nhandles_len;
1758  unsigned int fhandles_len;
1759 
1760  nhandles = NULL;
1761  fhandles = NULL;
1762  nhandles_len = 0;
1763  fhandles_len = 0;
1764  for (int sock = 0; sock != fdset->nsds; ++sock)
1765  {
1766  if (GNUNET_YES == GNUNET_NETWORK_fdset_test_native (fdset, sock))
1767  {
1768  struct GNUNET_NETWORK_Handle *nhandle;
1769  struct GNUNET_DISK_FileHandle *fhandle;
1770 
1771  nhandle = GNUNET_NETWORK_socket_box_native (sock);
1772  if (NULL != nhandle)
1773  {
1774  GNUNET_array_append (nhandles, nhandles_len, nhandle);
1775  }
1776  else
1777  {
1778  fhandle = GNUNET_DISK_get_handle_from_int_fd (sock);
1779  if (NULL != fhandle)
1780  {
1781  GNUNET_array_append (fhandles, fhandles_len, fhandle);
1782  }
1783  else
1784  {
1785  GNUNET_assert (0);
1786  }
1787  }
1788  }
1789  }
1790  *ntarget = nhandles_len > 0 ? nhandles : NULL;
1791  *ftarget = fhandles_len > 0 ? fhandles : NULL;
1792  *extracted_nhandles = nhandles_len;
1793  *extracted_fhandles = fhandles_len;
1794 }
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:1343
struct GNUNET_NETWORK_Handle * GNUNET_NETWORK_socket_box_native(SOCKTYPE fd)
Box a native socket (and check that it is a socket).
Definition: network.c:694
#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:1937
handle to a socket
Definition: network.c:46
#define GNUNET_YES
Definition: gnunet_common.h:80
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 2444 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().

2447 {
2448  struct DriverContext *context = cls;
2449  GNUNET_assert (NULL != context);
2450  GNUNET_assert (NULL != task);
2451  GNUNET_assert (NULL != fdi);
2452  GNUNET_assert (0 != (GNUNET_SCHEDULER_ET_IN & fdi->et) ||
2453  0 != (GNUNET_SCHEDULER_ET_OUT & fdi->et));
2454 
2455  if (!((NULL != fdi->fd) ^ (NULL != fdi->fh)) || (fdi->sock < 0))
2456  {
2457  /* exactly one out of {fd, hf} must be != NULL and the OS handle must be valid */
2458  return GNUNET_SYSERR;
2459  }
2460 
2461  struct Scheduled *scheduled = GNUNET_new (struct Scheduled);
2462  scheduled->task = task;
2463  scheduled->fdi = fdi;
2464  scheduled->et = fdi->et;
2465 
2467  context->scheduled_tail,
2468  scheduled);
2469  return GNUNET_OK;
2470 }
#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:78
#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:289
static pa_context * context
Pulseaudio context.
Driver context used by GNUNET_SCHEDULER_run.
Definition: scheduler.c:283
struct GNUNET_SCHEDULER_FdInfo * fdi
information about the network socket / file descriptor where the event is expected to occur ...
Definition: scheduler.c:270
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:255
Buffer available for writing.
#define GNUNET_SYSERR
Definition: gnunet_common.h:79
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:295
struct GNUNET_SCHEDULER_Task * task
the task, the event is related to
Definition: scheduler.c:264
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:276
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◆ select_del()

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

Definition at line 2474 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().

2476 {
2477  struct DriverContext *context;
2478  struct Scheduled *pos;
2479  int ret;
2480 
2481  GNUNET_assert (NULL != cls);
2482 
2483  context = cls;
2484  ret = GNUNET_SYSERR;
2485  pos = context->scheduled_head;
2486  while (NULL != pos)
2487  {
2488  struct Scheduled *next = pos->next;
2489  if (pos->task == task)
2490  {
2492  context->scheduled_tail,
2493  pos);
2494  GNUNET_free (pos);
2495  ret = GNUNET_OK;
2496  }
2497  pos = next;
2498  }
2499  return ret;
2500 }
#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.
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:78
struct Scheduled * scheduled_head
the head of a DLL containing information about the events the select driver is waiting for ...
Definition: scheduler.c:289
static int ret
Final status code.
Definition: gnunet-arm.c:89
static pa_context * context
Pulseaudio context.
Driver context used by GNUNET_SCHEDULER_run.
Definition: scheduler.c:283
A struct representing an event the select driver is waiting for.
Definition: scheduler.c:255
#define GNUNET_SYSERR
Definition: gnunet_common.h:79
struct Scheduled * scheduled_tail
the tail of a DLL containing information about the events the select driver is waiting for ...
Definition: scheduler.c:295
struct GNUNET_SCHEDULER_Task * task
the task, the event is related to
Definition: scheduler.c:264
struct Scheduled * next
Definition: scheduler.c:259
#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 2504 of file scheduler.c.

References GNUNET_assert, and DriverContext::timeout.

Referenced by GNUNET_SCHEDULER_driver_select().

2506 {
2507  struct DriverContext *context = cls;
2508 
2509  GNUNET_assert (NULL != context);
2510  context->timeout = dt;
2511 }
#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:283
struct GNUNET_TIME_Absolute timeout
the time when the select driver will wake up again (after calling select)
Definition: scheduler.c:301
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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 312 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 317 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 322 of file scheduler.c.

◆ shutdown_head

struct GNUNET_SCHEDULER_Task* shutdown_head
static

Head of list of tasks waiting for shutdown.

Definition at line 327 of file scheduler.c.

◆ shutdown_tail

struct GNUNET_SCHEDULER_Task* shutdown_tail
static

Tail of list of tasks waiting for shutdown.

Definition at line 332 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 341 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 350 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 356 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 361 of file scheduler.c.

◆ ready_head

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

Definition at line 366 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 378 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 384 of file scheduler.c.

◆ ready_count

unsigned int ready_count
static

Number of tasks on the ready list.

Definition at line 389 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 395 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 401 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 412 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 417 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 422 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 618 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 624 of file scheduler.c.

Referenced by GNUNET_SCHEDULER_driver_init(), and sighandler_shutdown().