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/*-
* Copyright (c) 2009 Pawel Jakub Dawidek <pjd@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/kmem.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/queue.h>
#include <sys/taskqueue.h>
#include <sys/taskq.h>
#include <vm/uma.h>
static uma_zone_t taskq_zone;
struct ostask {
struct task ost_task;
task_func_t *ost_func;
void *ost_arg;
};
taskq_t *system_taskq = NULL;
static void
system_taskq_init(void *arg)
{
system_taskq = (taskq_t *)taskqueue_thread;
taskq_zone = uma_zcreate("taskq_zone", sizeof(struct ostask),
NULL, NULL, NULL, NULL, 0, 0);
}
SYSINIT(system_taskq_init, SI_SUB_CONFIGURE, SI_ORDER_ANY, system_taskq_init, NULL);
static void
system_taskq_fini(void *arg)
{
uma_zdestroy(taskq_zone);
}
SYSUNINIT(system_taskq_fini, SI_SUB_CONFIGURE, SI_ORDER_ANY, system_taskq_fini, NULL);
taskq_t *
taskq_create(const char *name, int nthreads, pri_t pri, int minalloc __unused,
int maxalloc __unused, uint_t flags)
{
taskq_t *tq;
if ((flags & TASKQ_THREADS_CPU_PCT) != 0) {
/* TODO: Calculate number od threads. */
printf("%s: TASKQ_THREADS_CPU_PCT\n", __func__);
}
tq = kmem_alloc(sizeof(*tq), KM_SLEEP);
tq->tq_queue = taskqueue_create(name, M_WAITOK, taskqueue_thread_enqueue,
&tq->tq_queue);
(void) taskqueue_start_threads(&tq->tq_queue, nthreads, pri, name);
return ((taskq_t *)tq);
}
void
taskq_destroy(taskq_t *tq)
{
taskqueue_free(tq->tq_queue);
kmem_free(tq, sizeof(*tq));
}
int
taskq_member(taskq_t *tq, kthread_t *thread)
{
return (taskqueue_member(tq->tq_queue, thread));
}
static void
taskq_run(void *arg, int pending __unused)
{
struct ostask *task = arg;
task->ost_func(task->ost_arg);
uma_zfree(taskq_zone, task);
}
taskqid_t
taskq_dispatch(taskq_t *tq, task_func_t func, void *arg, uint_t flags)
{
struct ostask *task;
int mflag;
if ((flags & (TQ_SLEEP | TQ_NOQUEUE)) == TQ_SLEEP)
mflag = M_WAITOK;
else
mflag = M_NOWAIT;
task = uma_zalloc(taskq_zone, mflag);
if (task == NULL)
return (0);
task->ost_func = func;
task->ost_arg = arg;
TASK_INIT(&task->ost_task, 0, taskq_run, task);
taskqueue_enqueue(tq->tq_queue, &task->ost_task);
return ((taskqid_t)(void *)task);
}
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