kernel/test/synch/rwlock1.c

   1 /*
   2  * Copyright (c) 2001-2004 Jakub Jermar
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * - Redistributions of source code must retain the above copyright
  10  *   notice, this list of conditions and the following disclaimer.
  11  * - Redistributions in binary form must reproduce the above copyright
  12  *   notice, this list of conditions and the following disclaimer in the
  13  *   documentation and/or other materials provided with the distribution.
  14  * - The name of the author may not be used to endorse or promote products
  15  *   derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include <test.h>
  30 #include <arch.h>
  31 #include <atomic.h>
  32 #include <print.h>
  33 #include <proc/thread.h>
  34
  35 #include <synch/waitq.h>
  36 #include <synch/rwlock.h>
  37
  38 #define READERS         50
  39 #define WRITERS         50
  40
  41 static rwlock_t rwlock;
  42
  43 char * test_rwlock1(bool quiet)
  44 {
  45         rwlock_initialize(&rwlock);
  46
  47         rwlock_write_lock(&rwlock);
  48         rwlock_write_unlock(&rwlock);
  49
  50         rwlock_read_lock(&rwlock);
  51         rwlock_read_lock(&rwlock);
  52         rwlock_read_lock(&rwlock);
  53         rwlock_read_lock(&rwlock);
  54         rwlock_read_lock(&rwlock);
  55
  56         rwlock_read_unlock(&rwlock);
  57         rwlock_read_unlock(&rwlock);
  58         rwlock_read_unlock(&rwlock);
  59         rwlock_read_unlock(&rwlock);
  60         rwlock_read_unlock(&rwlock);
  61
  62         rwlock_write_lock(&rwlock);
  63         rwlock_write_unlock(&rwlock);
  64
  65         rwlock_read_lock(&rwlock);
  66         rwlock_read_unlock(&rwlock);
  67
  68         rwlock_write_lock(&rwlock);
  69         rwlock_write_unlock(&rwlock);
  70
  71         rwlock_read_lock(&rwlock);
  72         rwlock_read_unlock(&rwlock);
  73
  74         return NULL;
  75 }