Subversion Repositories HelenOS

Rev

Rev 1787 | Rev 2042 | Go to most recent revision | Blame | Compare with Previous | Last modification | View Log | Download | RSS feed

  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/rwlock.h>
  36.  
  37. #define READERS     50
  38. #define WRITERS     50
  39.  
  40. static rwlock_t rwlock;
  41.  
  42. static void reader(void *arg);
  43. static void failed(void);
  44.  
  45. static void reader(void *arg)
  46. {
  47.     thread_detach(THREAD);
  48.  
  49.     printf("cpu%d, tid %d: trying to lock rwlock for reading....\n", CPU->id, THREAD->tid);    
  50.     rwlock_read_lock(&rwlock);
  51.     rwlock_read_unlock(&rwlock);   
  52.     printf("cpu%d, tid %d: success\n", CPU->id, THREAD->tid);          
  53.  
  54.     printf("cpu%d, tid %d: trying to lock rwlock for writing....\n", CPU->id, THREAD->tid);    
  55.  
  56.     rwlock_write_lock(&rwlock);
  57.     rwlock_write_unlock(&rwlock);
  58.     printf("cpu%d, tid %d: success\n", CPU->id, THREAD->tid);              
  59.    
  60.     printf("Test passed.\n");  
  61.  
  62. }
  63.  
  64. static void failed(void)
  65. {
  66.     printf("Test failed prematurely.\n");
  67.     thread_exit();
  68. }
  69.  
  70. void test_rwlock3(void)
  71. {
  72.     int i;
  73.     thread_t *thrd;
  74.    
  75.     printf("Read/write locks test #3\n");
  76.    
  77.     rwlock_initialize(&rwlock);
  78.  
  79.     rwlock_write_lock(&rwlock);
  80.    
  81.     for (i=0; i<4; i++) {
  82.         thrd = thread_create(reader, NULL, TASK, 0, "reader");
  83.         if (thrd)
  84.             thread_ready(thrd);
  85.         else
  86.             failed();
  87.     }
  88.  
  89.  
  90.     thread_sleep(1);
  91.    
  92.     rwlock_write_unlock(&rwlock);
  93. }
  94.