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Switch from BROADCAST to SIGNAL in many cases; hold lock while doing either.

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This commit is contained in:
Bob Halley
1998-10-22 19:23:26 +00:00
parent 0bbadb0a2f
commit f191e3b4e8
2 changed files with 14 additions and 25 deletions
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21
lib/isc/task.c
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@@ -28,6 +28,8 @@
INSIST(isc_mutex_unlock((lp)) == ISC_R_SUCCESS);
#define BROADCAST(cvp) \
INSIST(isc_condition_broadcast((cvp)) == ISC_R_SUCCESS);
#define SIGNAL(cvp) \
INSIST(isc_condition_signal((cvp)) == ISC_R_SUCCESS);
#define WAIT(cvp, lp) \
INSIST(isc_condition_wait((cvp), (lp)) == ISC_R_SUCCESS);
#define WAITUNTIL(cvp, lp, tp, bp) \
@@ -303,7 +305,6 @@ isc_task_send(isc_task_t task, isc_event_t *eventp) {
}
if (was_idle) {
isc_boolean_t need_wakeup = ISC_FALSE;
isc_taskmgr_t manager;
/*
@@ -328,18 +329,9 @@ isc_task_send(isc_task_t task, isc_event_t *eventp) {
manager = task->manager;
INSIST(VALID_MANAGER(manager));
LOCK(&manager->lock);
if (EMPTY(manager->ready_tasks))
need_wakeup = ISC_TRUE;
ENQUEUE(manager->ready_tasks, task, ready_link);
SIGNAL(&manager->work_available);
UNLOCK(&manager->lock);
/*
* If the runnable queue is empty, the worker threads could
* either be executing tasks or waiting for something to do.
* We wakeup anyone who is sleeping.
*/
if (need_wakeup)
BROADCAST(&manager->work_available);
}
*eventp = NULL;
@@ -416,19 +408,14 @@ isc_task_shutdown(isc_task_t task) {
return;
if (was_idle) {
isc_boolean_t need_wakeup = ISC_FALSE;
isc_taskmgr_t manager;
manager = task->manager;
INSIST(VALID_MANAGER(manager));
LOCK(&manager->lock);
if (EMPTY(manager->ready_tasks))
need_wakeup = ISC_TRUE;
ENQUEUE(manager->ready_tasks, task, ready_link);
SIGNAL(&manager->work_available);
UNLOCK(&manager->lock);
if (need_wakeup)
BROADCAST(&manager->work_available);
}
}