tests/rump/kernspace/tsleep.c

   1 /*      $NetBSD: tsleep.c,v 1.4 2014/03/21 22:18:57 dholland 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: tsleep.c,v 1.4 2014/03/21 22:18:57 dholland Exp $");
  33 #endif /* !lint */
  34
  35 #include <sys/param.h>
  36 #include <sys/kernel.h>
  37 #include <sys/kthread.h>
  38 #include <sys/proc.h>
  39
  40 #include "kernspace.h"
  41
  42 #define NTHREADS 10
  43
  44 /*
  45  * mpsafe thread.  need dedicated interlock
  46  */
  47 static kmutex_t mymtx;
  48
  49 static void
  50 tinythread(void *arg)
  51 {
  52         static int wakeups;
  53         int i, rv;
  54         bool relock = ((uintptr_t)arg % 2) == 0;
  55
  56         for (i = 0; i < 1000; i++) {
  57                 mutex_enter(&mymtx);
  58                 wakeup(tinythread);
  59                 if (wakeups >= NTHREADS-1) {
  60                         mutex_exit(&mymtx);
  61                         break;
  62                 }
  63                 rv = mtsleep(tinythread, relock ? 0 : PNORELOCK,
  64                     "haa", 0, &mymtx);
  65                 if (relock)
  66                         mutex_exit(&mymtx);
  67                 if (rv != 0)
  68                         panic("mtsleep failed");
  69         }
  70
  71         mutex_enter(&mymtx);
  72         wakeups++;
  73         wakeup(tinythread);
  74
  75         rv = mtsleep(rumptest_tsleep, PNORELOCK, "kepuli", 1, &mymtx);
  76         if (rv != EWOULDBLOCK)
  77                 panic("mtsleep unexpected return value %d", rv);
  78
  79         kthread_exit(0);
  80 }
  81
  82 void
  83 rumptest_tsleep()
  84 {
  85         struct lwp *notbigl[NTHREADS];
  86         int rv, i;
  87
  88         mutex_init(&mymtx, MUTEX_DEFAULT, IPL_NONE);
  89
  90         for (i = 0; i < NTHREADS; i++) {
  91                 rv = kthread_create(PRI_NONE, KTHREAD_MUSTJOIN| KTHREAD_MPSAFE,
  92                     NULL, tinythread, (void *)(uintptr_t)i, &notbigl[i], "nb");
  93                 if (rv)
  94                         panic("thread create failed: %d", rv);
  95         }
  96
  97         for (i = 0; i < NTHREADS; i++) {
  98                 kthread_join(notbigl[i]);
  99         }
 100 }