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/*
* Copyright (C) 2009, 2010 Internet Systems Consortium, Inc. ("ISC")
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: task_api.c,v 1.7 2010-12-22 23:46:59 tbox Exp $ */
#include <config.h>
#include <unistd.h>
#include <isc/app.h>
#include <isc/magic.h>
#include <isc/mutex.h>
#include <isc/once.h>
#include <isc/task.h>
#include <isc/util.h>
static isc_mutex_t createlock;
static isc_once_t once = ISC_ONCE_INIT;
static isc_taskmgrcreatefunc_t taskmgr_createfunc = NULL;
static void
initialize(void) {
RUNTIME_CHECK(isc_mutex_init(&createlock) == ISC_R_SUCCESS);
}
isc_result_t
isc_task_register(isc_taskmgrcreatefunc_t createfunc) {
isc_result_t result = ISC_R_SUCCESS;
RUNTIME_CHECK(isc_once_do(&once, initialize) == ISC_R_SUCCESS);
LOCK(&createlock);
if (taskmgr_createfunc == NULL)
taskmgr_createfunc = createfunc;
else
result = ISC_R_EXISTS;
UNLOCK(&createlock);
return (result);
}
isc_result_t
isc_taskmgr_createinctx(isc_mem_t *mctx, isc_appctx_t *actx,
unsigned int workers, unsigned int default_quantum,
isc_taskmgr_t **managerp)
{
isc_result_t result;
LOCK(&createlock);
REQUIRE(taskmgr_createfunc != NULL);
result = (*taskmgr_createfunc)(mctx, workers, default_quantum,
managerp);
UNLOCK(&createlock);
if (result == ISC_R_SUCCESS)
isc_appctx_settaskmgr(actx, *managerp);
return (result);
}
isc_result_t
isc_taskmgr_create(isc_mem_t *mctx, unsigned int workers,
unsigned int default_quantum, isc_taskmgr_t **managerp)
{
isc_result_t result;
LOCK(&createlock);
REQUIRE(taskmgr_createfunc != NULL);
result = (*taskmgr_createfunc)(mctx, workers, default_quantum,
managerp);
UNLOCK(&createlock);
return (result);
}
void
isc_taskmgr_destroy(isc_taskmgr_t **managerp) {
REQUIRE(managerp != NULL && ISCAPI_TASKMGR_VALID(*managerp));
(*managerp)->methods->destroy(managerp);
ENSURE(*managerp == NULL);
}
isc_result_t
isc_task_create(isc_taskmgr_t *manager, unsigned int quantum,
isc_task_t **taskp)
{
REQUIRE(ISCAPI_TASKMGR_VALID(manager));
REQUIRE(taskp != NULL && *taskp == NULL);
return (manager->methods->taskcreate(manager, quantum, taskp));
}
void
isc_task_attach(isc_task_t *source, isc_task_t **targetp) {
REQUIRE(ISCAPI_TASK_VALID(source));
REQUIRE(targetp != NULL && *targetp == NULL);
source->methods->attach(source, targetp);
ENSURE(*targetp == source);
}
void
isc_task_detach(isc_task_t **taskp) {
REQUIRE(taskp != NULL && ISCAPI_TASK_VALID(*taskp));
(*taskp)->methods->detach(taskp);
ENSURE(*taskp == NULL);
}
void
isc_task_send(isc_task_t *task, isc_event_t **eventp) {
REQUIRE(ISCAPI_TASK_VALID(task));
REQUIRE(eventp != NULL && *eventp != NULL);
task->methods->send(task, eventp);
ENSURE(*eventp == NULL);
}
void
isc_task_sendanddetach(isc_task_t **taskp, isc_event_t **eventp) {
REQUIRE(taskp != NULL && ISCAPI_TASK_VALID(*taskp));
REQUIRE(eventp != NULL && *eventp != NULL);
(*taskp)->methods->sendanddetach(taskp, eventp);
ENSURE(*taskp == NULL && *eventp == NULL);
}
unsigned int
isc_task_unsend(isc_task_t *task, void *sender, isc_eventtype_t type,
void *tag, isc_eventlist_t *events)
{
REQUIRE(ISCAPI_TASK_VALID(task));
return (task->methods->unsend(task, sender, type, tag, events));
}
isc_result_t
isc_task_onshutdown(isc_task_t *task, isc_taskaction_t action, const void *arg)
{
REQUIRE(ISCAPI_TASK_VALID(task));
return (task->methods->onshutdown(task, action, arg));
}
void
isc_task_shutdown(isc_task_t *task) {
REQUIRE(ISCAPI_TASK_VALID(task));
task->methods->shutdown(task);
}
void
isc_task_setname(isc_task_t *task, const char *name, void *tag) {
REQUIRE(ISCAPI_TASK_VALID(task));
task->methods->setname(task, name, tag);
}
unsigned int
isc_task_purge(isc_task_t *task, void *sender, isc_eventtype_t type, void *tag)
{
REQUIRE(ISCAPI_TASK_VALID(task));
return (task->methods->purgeevents(task, sender, type, tag));
}
isc_result_t
isc_task_beginexclusive(isc_task_t *task) {
REQUIRE(ISCAPI_TASK_VALID(task));
return (task->methods->beginexclusive(task));
}
void
isc_task_endexclusive(isc_task_t *task) {
REQUIRE(ISCAPI_TASK_VALID(task));
task->methods->endexclusive(task);
}
/*%
* This is necessary for libisc's internal timer implementation. Other
* implementation might skip implementing this.
*/
unsigned int
isc_task_purgerange(isc_task_t *task, void *sender, isc_eventtype_t first,
isc_eventtype_t last, void *tag)
{
REQUIRE(ISCAPI_TASK_VALID(task));
return (task->methods->purgerange(task, sender, first, last, tag));
}
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