/*!
* \brief Idle function for worker threads
*
* The worker waits here until it gets told by the threadpool
* to wake up.
*
* worker is locked before entering this function.
*
* \param worker The idle worker
* \retval 0 The thread is being woken up so that it can conclude.
* \retval non-zero The thread is being woken up to do more work.
*/
static int worker_idle(struct worker_thread *worker)
{
struct timeval start = ast_tvnow();
struct timespec end = {
.tv_sec = start.tv_sec + worker->options.idle_timeout,
.tv_nsec = start.tv_usec * 1000,
};
while (!worker->wake_up) {
if (worker->options.idle_timeout <= 0) {
ast_cond_wait(&worker->cond, &worker->lock);
} else if (ast_cond_timedwait(&worker->cond, &worker->lock, &end) == ETIMEDOUT) {
break;
}
}
if (!worker->wake_up) {
ast_debug(1, "Worker thread idle timeout reached. Dying.\n");
threadpool_idle_thread_dead(worker->pool, worker);
worker->state = DEAD;
}
worker->wake_up = 0;
return worker->state == ALIVE;
}
/*!
* \brief Change a worker's state
*
* The threadpool calls into this function in order to let a worker know
* how it should proceed.
*
* \retval -1 failure (state transition not permitted)
* \retval 0 success
*/
static int worker_set_state(struct worker_thread *worker, enum worker_state state)
{
SCOPED_MUTEX(lock, &worker->lock);
switch (state) {
case ALIVE:
/* This can occur due to a race condition between being told to go active
* and an idle timeout happening.
*/
if (worker->state == DEAD) {
return -1;
}
ast_assert(worker->state != ZOMBIE);
break;
case DEAD:
break;
case ZOMBIE:
ast_assert(worker->state != DEAD);
break;
}
worker->state = state;
worker->wake_up = 1;
ast_cond_signal(&worker->cond);
return 0;
}
/*!
* \brief Idle function for worker threads
*
* The worker waits here until it gets told by the threadpool
* to wake up.
*
* worker is locked before entering this function.
*
* \param worker The idle worker
* \retval 0 The thread is being woken up so that it can conclude.
* \retval non-zero The thread is being woken up to do more work.
*/
static int worker_idle(struct worker_thread *worker)
{
struct timeval start = ast_tvnow();
struct timespec end = {
.tv_sec = start.tv_sec + worker->options.idle_timeout,
.tv_nsec = start.tv_usec * 1000,
};
while (!worker->wake_up) {
if (worker->options.idle_timeout <= 0) {
ast_cond_wait(&worker->cond, &worker->lock);
} else if (ast_cond_timedwait(&worker->cond, &worker->lock, &end) == ETIMEDOUT) {
break;
}
}
if (!worker->wake_up) {
ast_debug(1, "Worker thread idle timeout reached. Dying.\n");
threadpool_idle_thread_dead(worker->pool, worker);
worker->state = DEAD;
}
worker->wake_up = 0;
return worker->state == ALIVE;
}
/*!
* \brief Change a worker's state
*
* The threadpool calls into this function in order to let a worker know
* how it should proceed.
*/
static void worker_set_state(struct worker_thread *worker, enum worker_state state)
{
SCOPED_MUTEX(lock, &worker->lock);
worker->state = state;
worker->wake_up = 1;
ast_cond_signal(&worker->cond);
}
