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      1 /*	$NetBSD: thread.c,v 1.2 2011/08/07 14:03:15 rmind Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2010 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: thread.c,v 1.2 2011/08/07 14:03:15 rmind Exp $");
     33 #endif /* !lint */
     34 
     35 #include <sys/param.h>
     36 #include <sys/kernel.h>
     37 #include <sys/kthread.h>
     38 #include <sys/mutex.h>
     39 #include <sys/proc.h>
     40 
     41 #include "kernspace.h"
     42 
     43 static volatile int testit;
     44 
     45 static void
     46 jointhread(void *arg)
     47 {
     48 
     49 	kpause("take5", false, 1, NULL);
     50 	testit = 1;
     51 	kthread_exit(0);
     52 }
     53 
     54 void
     55 rumptest_threadjoin()
     56 {
     57 	struct lwp *newl;
     58 	int rv;
     59 
     60 	rv = kthread_create(PRI_NONE, KTHREAD_MUSTJOIN | KTHREAD_MPSAFE, NULL,
     61 	    jointhread, NULL, &newl, "jointest");
     62 	if (rv)
     63 		panic("thread creation failed: %d", rv);
     64 	rv = kthread_join(newl);
     65 	if (rv)
     66 		panic("thread join failed: %d", rv);
     67 
     68 	if (testit != 1)
     69 		panic("new thread did not run");
     70 }
     71 
     72 static kmutex_t mtx;
     73 static kcondvar_t cv;
     74 static int value;
     75 
     76 static void
     77 thethread(void *arg)
     78 {
     79 
     80 	mutex_enter(&mtx);
     81 	value = 1;
     82 	cv_signal(&cv);
     83 	mutex_exit(&mtx);
     84 
     85 	kthread_exit(0);
     86 }
     87 
     88 void
     89 rumptest_thread()
     90 {
     91 	struct lwp *newl;
     92 	int rv;
     93 
     94 	mutex_init(&mtx, MUTEX_DEFAULT, IPL_NONE);
     95 	cv_init(&cv, "jooei");
     96 	rv = kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL,
     97 	    thethread, NULL, &newl, "ktest");
     98 	if (rv)
     99 		panic("thread creation failed: %d", rv);
    100 
    101 	mutex_enter(&mtx);
    102 	while (value == 0)
    103 		cv_wait(&cv, &mtx);
    104 	mutex_exit(&mtx);
    105 
    106 	/* try to verify thread really exists and we don't crash */
    107 	kpause("take1", false, 1, NULL);
    108 }
    109