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[Core] Scheduler: Fix race between switch_scheduler_add_task() and task_thread_loop(). Add new switch_scheduler_add_task_ex() method.

This commit is contained in:
Andrey Volk 2020-10-23 21:48:53 +04:00
parent 3065cb9168
commit 5ed17dd19c
2 changed files with 38 additions and 5 deletions
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17
src/include/switch_scheduler.h
View File

@ -66,6 +66,23 @@ SWITCH_DECLARE(uint32_t) switch_scheduler_add_task(time_t task_runtime,
switch_scheduler_func_t func,
const char *desc, const char *group, uint32_t cmd_id, void *cmd_arg, switch_scheduler_flag_t flags);
/*!
\brief Schedule a task in the future
\param task_runtime the time in epoch seconds to execute the task.
\param func the callback function to execute when the task is executed.
\param desc an arbitrary description of the task.
\param group a group id tag to link multiple tasks to a single entity.
\param cmd_id an arbitrary index number be used in the callback.
\param cmd_arg user data to be passed to the callback.
\param flags flags to alter behaviour
\param task_id pointer to put the id of the task to
\return the id of the task
*/
SWITCH_DECLARE(uint32_t) switch_scheduler_add_task_ex(time_t task_runtime,
switch_scheduler_func_t func,
const char *desc, const char *group, uint32_t cmd_id, void *cmd_arg, switch_scheduler_flag_t flags, uint32_t *task_id);
/*!
\brief Delete a scheduled task
\param task_id the id of the task

22
src/switch_scheduler.c
View File

@ -212,6 +212,18 @@ SWITCH_DECLARE(uint32_t) switch_scheduler_add_task(time_t task_runtime,
switch_scheduler_func_t func,
const char *desc, const char *group, uint32_t cmd_id, void *cmd_arg, switch_scheduler_flag_t flags)
{
uint32_t task_id;
switch_scheduler_add_task_ex(task_runtime, func, desc, group, cmd_id, cmd_arg, flags, &task_id);
return task_id;
}
SWITCH_DECLARE(uint32_t) switch_scheduler_add_task_ex(time_t task_runtime,
switch_scheduler_func_t func,
const char *desc, const char *group, uint32_t cmd_id, void *cmd_arg, switch_scheduler_flag_t flags, uint32_t *task_id)
{
uint32_t result;
switch_scheduler_task_container_t *container, *tp;
switch_event_t *event;
switch_time_t now = switch_epoch_time_now(NULL);
@ -220,6 +232,7 @@ SWITCH_DECLARE(uint32_t) switch_scheduler_add_task(time_t task_runtime,
switch_mutex_lock(globals.task_mutex);
switch_zmalloc(container, sizeof(*container));
switch_assert(func);
switch_assert(task_id);
if (task_runtime < now) {
container->task.repeat = (uint32_t)task_runtime;
@ -246,8 +259,6 @@ SWITCH_DECLARE(uint32_t) switch_scheduler_add_task(time_t task_runtime,
for (container->task.task_id = 0; !container->task.task_id; container->task.task_id = ++globals.task_id);
switch_mutex_unlock(globals.task_mutex);
tp = container;
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Added task %u %s (%s) to run at %" SWITCH_INT64_T_FMT "\n",
tp->task.task_id, tp->desc, switch_str_nil(tp->task.group), tp->task.runtime);
@ -260,7 +271,12 @@ SWITCH_DECLARE(uint32_t) switch_scheduler_add_task(time_t task_runtime,
switch_queue_push(globals.event_queue, event);
event = NULL;
}
return container->task.task_id;
result = *task_id = container->task.task_id;
switch_mutex_unlock(globals.task_mutex);
return result;
}
SWITCH_DECLARE(uint32_t) switch_scheduler_del_task_id(uint32_t task_id)