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/* $NetBSD: workqueue.c,v 1.6 2017/12/28 07:46:34 ozaki-r Exp $ */
/*-
* Copyright (c) 2017 The NetBSD Foundation, Inc.
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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>
#if !defined(lint)
__RCSID("$NetBSD: workqueue.c,v 1.6 2017/12/28 07:46:34 ozaki-r Exp $");
#endif /* !lint */
#include <sys/param.h>
#include <sys/condvar.h>
#include <sys/kernel.h>
#include <sys/kmem.h>
#include <sys/kthread.h>
#include <sys/mutex.h>
#include <sys/workqueue.h>
#include "kernspace.h"
struct test_softc {
kmutex_t mtx;
kcondvar_t cv;
struct workqueue *wq;
struct work wk;
int counter;
};
static void
rump_work1(struct work *wk, void *arg)
{
struct test_softc *sc = arg;
mutex_enter(&sc->mtx);
++sc->counter;
cv_broadcast(&sc->cv);
mutex_exit(&sc->mtx);
}
static struct test_softc *
create_sc(void)
{
int rv;
struct test_softc *sc;
sc = kmem_zalloc(sizeof(*sc), KM_SLEEP);
mutex_init(&sc->mtx, MUTEX_DEFAULT, IPL_NONE);
cv_init(&sc->cv, "rumpwqcv");
rv = workqueue_create(&sc->wq, "rumpwq",
rump_work1, sc, PRI_SOFTNET, IPL_SOFTNET, 0);
if (rv)
panic("workqueue creation failed: %d", rv);
sc->counter = 0;
return sc;
}
static void
destroy_sc(struct test_softc *sc)
{
cv_destroy(&sc->cv);
mutex_destroy(&sc->mtx);
workqueue_destroy(sc->wq);
}
void
rumptest_workqueue1()
{
struct test_softc *sc;
sc = create_sc();
#define ITERATIONS 12435
for (int i = 0; i < ITERATIONS; ++i) {
int e;
mutex_enter(&sc->mtx);
workqueue_enqueue(sc->wq, &sc->wk, NULL);
e = cv_timedwait(&sc->cv, &sc->mtx, hz * 2);
if (e != 0)
panic("cv_timedwait timed out (i=%d)", i);
mutex_exit(&sc->mtx);
}
KASSERT(sc->counter == ITERATIONS);
destroy_sc(sc);
#undef ITERATIONS
}
void
rumptest_workqueue_wait(void)
{
struct test_softc *sc;
struct work dummy;
sc = create_sc();
#define ITERATIONS 12435
for (size_t i = 0; i < ITERATIONS; ++i) {
KASSERT(sc->counter == i);
workqueue_enqueue(sc->wq, &sc->wk, NULL);
workqueue_wait(sc->wq, &sc->wk);
KASSERT(sc->counter == (i + 1));
}
KASSERT(sc->counter == ITERATIONS);
/* Wait for a work that is not enqueued. Just return immediately. */
workqueue_wait(sc->wq, &dummy);
destroy_sc(sc);
#undef ITERATIONS
}
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