1 /* $NetBSD: workqueue.c,v 1.1 2017/09/29 12:42:36 maya Exp $ */ 2 3 /*- 4 * Copyright (c) 2017 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND 17 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 23 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 26 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN 27 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 #if !defined(lint) 32 __RCSID("$NetBSD: workqueue.c,v 1.1 2017/09/29 12:42:36 maya Exp $"); 33 #endif /* !lint */ 34 35 #include <sys/param.h> 36 #include <sys/condvar.h> 37 #include <sys/kernel.h> 38 #include <sys/kmem.h> 39 #include <sys/kthread.h> 40 #include <sys/mutex.h> 41 #include <sys/workqueue.h> 42 43 #include "kernspace.h" 44 45 struct test_softc { 46 kmutex_t mtx; 47 kcondvar_t cv; 48 struct workqueue *wq; 49 struct work wk; 50 int counter; 51 }; 52 53 static void 54 rump_work1(struct work *wk, void *arg) 55 { 56 struct test_softc *sc = arg; 57 58 mutex_enter(&sc->mtx); 59 ++sc->counter; 60 cv_broadcast(&sc->cv); 61 mutex_exit(&sc->mtx); 62 } 63 64 void 65 rumptest_workqueue1() 66 { 67 68 int rv; 69 70 struct test_softc *sc; 71 72 sc = kmem_zalloc(sizeof(*sc), KM_SLEEP); 73 74 mutex_init(&sc->mtx, MUTEX_DEFAULT, IPL_NONE); 75 cv_init(&sc->cv, "rumpwqcv"); 76 77 rv = workqueue_create(&sc->wq, "rumpwq", 78 rump_work1, sc, PRI_SOFTNET, IPL_SOFTNET, 0); 79 if (rv) 80 panic("workqueue creation failed: %d", rv); 81 82 sc->counter = 0; 83 84 #define ITERATIONS 12435 85 for (size_t i = 0; i < ITERATIONS; ++i) { 86 workqueue_enqueue(sc->wq, &sc->wk, NULL); 87 mutex_enter(&sc->mtx); 88 cv_timedwait(&sc->cv, &sc->mtx, 2); 89 mutex_exit(&sc->mtx); 90 } 91 92 KASSERT(sc->counter == ITERATIONS); 93 94 cv_destroy(&sc->cv); 95 mutex_destroy(&sc->mtx); 96 workqueue_destroy(sc->wq); 97 } 98 99