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Code Issues Releases Wiki Activity

update

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This commit is contained in:
Bob Halley
1998-08-18 19:28:30 +00:00
parent d6da3b9e10
commit 50f339a799
7 changed files with 139 additions and 90 deletions
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61
lib/isc/task.c
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@@ -12,14 +12,16 @@
(t)->magic == TASK_MAGIC)
/*
* We use macros instead of calling the os_ routines
* directly because the capital letters make the
* locking stand out.
* We use macros instead of calling the os_ routines directly because
* the capital letters make the locking stand out.
*
* We INSIST that they succeed since there's no way for us to continue
* if they fail.
*/
#define LOCK(lp) os_mutex_lock((lp))
#define UNLOCK(lp) os_mutex_unlock((lp))
#define WAIT(cvp, lp) os_condition_wait((cvp), (lp))
#define BROADCAST(cvp) os_condition_broadcast((cvp))
#define LOCK(lp) INSIST(os_mutex_lock((lp)))
#define UNLOCK(lp) INSIST(os_mutex_unlock((lp)))
#define WAIT(cvp, lp) INSIST(os_condition_wait((cvp), (lp)))
#define BROADCAST(cvp) INSIST(os_condition_broadcast((cvp)))
#define DEFAULT_DEFAULT_QUANTUM 5
@@ -85,7 +87,7 @@ task_free(task_t task) {
BROADCAST(&manager->work_available);
}
UNLOCK(&manager->lock);
os_mutex_destroy(&task->lock);
(void)os_mutex_destroy(&task->lock);
task->magic = 0;
mem_put(manager->mctx, task, sizeof *task);
}
@@ -106,7 +108,10 @@ task_create(task_manager_t manager, void *arg,
task->magic = TASK_MAGIC;
task->manager = manager;
os_mutex_init(&task->lock);
if (!os_mutex_init(&task->lock)) {
mem_put(manager->mctx, task, sizeof *task);
return (FALSE);
}
task->state = task_state_idle;
task->references = 1;
INIT_LIST(task->events);
@@ -128,7 +133,7 @@ task_create(task_manager_t manager, void *arg,
return (TRUE);
}
boolean_t
void
task_attach(task_t task, task_t *taskp) {
REQUIRE(VALID_TASK(task));
@@ -139,8 +144,6 @@ task_attach(task_t task, task_t *taskp) {
UNLOCK(&task->lock);
*taskp = task;
return (TRUE);
}
void
@@ -173,11 +176,14 @@ task_detach(task_t *taskp) {
}
boolean_t
task_send_event(task_t task, generic_event_t event) {
task_send_event(task_t task, generic_event_t *eventp) {
boolean_t was_idle = FALSE;
boolean_t discard = FALSE;
generic_event_t event;
REQUIRE(VALID_TASK(task));
REQUIRE(eventp != NULL);
event = *eventp;
REQUIRE(event != NULL);
XTRACE("sending");
@@ -202,6 +208,7 @@ task_send_event(task_t task, generic_event_t event) {
if (discard) {
event_put(event);
*eventp = NULL;
return (TRUE);
}
@@ -245,6 +252,8 @@ task_send_event(task_t task, generic_event_t event) {
BROADCAST(&manager->work_available);
}
*eventp = NULL;
XTRACE("sent");
return (TRUE);
}
@@ -557,9 +566,9 @@ void *task_manager_run(void *uap) {
static void
manager_free(task_manager_t manager) {
os_condition_destroy(&manager->work_available);
os_condition_destroy(&manager->no_workers);
os_mutex_destroy(&manager->lock);
(void)os_condition_destroy(&manager->work_available);
(void)os_condition_destroy(&manager->no_workers);
(void)os_mutex_destroy(&manager->lock);
manager->magic = 0;
mem_put(manager->mctx, manager, sizeof *manager);
}
@@ -577,16 +586,28 @@ task_manager_create(mem_context_t mctx, unsigned int workers,
return (0);
manager->magic = TASK_MANAGER_MAGIC;
manager->mctx = mctx;
os_mutex_init(&manager->lock);
if (!os_mutex_init(&manager->lock)) {
mem_put(mctx, manager, sizeof *manager);
return (0);
}
if (default_quantum == 0)
default_quantum = DEFAULT_DEFAULT_QUANTUM;
manager->default_quantum = default_quantum;
INIT_LIST(manager->tasks);
INIT_LIST(manager->ready_tasks);
os_condition_init(&manager->work_available);
if (!os_condition_init(&manager->work_available)) {
(void)os_mutex_destroy(&manager->lock);
mem_put(mctx, manager, sizeof *manager);
return (0);
}
manager->exiting = FALSE;
manager->workers = 0;
os_condition_init(&manager->no_workers);
if (!os_condition_init(&manager->no_workers)) {
(void)os_condition_destroy(&manager->work_available);
(void)os_mutex_destroy(&manager->lock);
mem_put(mctx, manager, sizeof *manager);
return (0);
}
LOCK(&manager->lock);
/*
@@ -596,7 +617,7 @@ task_manager_create(mem_context_t mctx, unsigned int workers,
if (os_thread_create(task_manager_run, manager, &thread)) {
manager->workers++;
started++;
os_thread_detach(thread);
(void)os_thread_detach(thread);
}
}
UNLOCK(&manager->lock);