nsprpub/pr/tests/semapong.c

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* ***** BEGIN LICENSE BLOCK *****
   3  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   4  *
   5  * The contents of this file are subject to the Mozilla Public License Version
   6  * 1.1 (the "License"); you may not use this file except in compliance with
   7  * the License. You may obtain a copy of the License at
   8  * http://www.mozilla.org/MPL/
   9  *
  10  * Software distributed under the License is distributed on an "AS IS" basis,
  11  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  12  * for the specific language governing rights and limitations under the
  13  * License.
  14  *
  15  * The Original Code is the Netscape Portable Runtime (NSPR).
  16  *
  17  * The Initial Developer of the Original Code is
  18  * Netscape Communications Corporation.
  19  * Portions created by the Initial Developer are Copyright (C) 1999-2000
  20  * the Initial Developer. All Rights Reserved.
  21  *
  22  * Contributor(s):
  23  *
  24  * Alternatively, the contents of this file may be used under the terms of
  25  * either the GNU General Public License Version 2 or later (the "GPL"), or
  26  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  27  * in which case the provisions of the GPL or the LGPL are applicable instead
  28  * of those above. If you wish to allow use of your version of this file only
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  33  * the provisions above, a recipient may use your version of this file under
  34  * the terms of any one of the MPL, the GPL or the LGPL.
  35  *
  36  * ***** END LICENSE BLOCK ***** */
  37
  38 #include "nspr.h"
  39 #include "plgetopt.h"
  40
  41 #include <stdio.h>
  42
  43 #define SHM_NAME "/tmp/counter"
  44 #define SEM_NAME1 "/tmp/foo.sem"
  45 #define SEM_NAME2 "/tmp/bar.sem"
  46 #define ITERATIONS 1000
  47
  48 static PRBool debug_mode = PR_FALSE;
  49 static PRIntn iterations = ITERATIONS;
  50 static PRSem *sem1, *sem2;
  51
  52 static void Help(void)
  53 {
  54     fprintf(stderr, "semapong test program usage:\n");
  55     fprintf(stderr, "\t-d           debug mode         (FALSE)\n");
  56     fprintf(stderr, "\t-c <count>   loop count         (%d)\n", ITERATIONS);
  57     fprintf(stderr, "\t-h           this message\n");
  58 }  /* Help */
  59
  60 int main(int argc, char **argv)
  61 {
  62     PRIntn i;
  63     PRSharedMemory *shm;
  64     PRIntn *counter_addr;
  65     PLOptStatus os;
  66     PLOptState *opt = PL_CreateOptState(argc, argv, "dc:h");
  67
  68     while (PL_OPT_EOL != (os = PL_GetNextOpt(opt))) {
  69         if (PL_OPT_BAD == os) continue;
  70         switch (opt->option) {
  71             case 'd':  /* debug mode */
  72                 debug_mode = PR_TRUE;
  73                 break;
  74             case 'c':  /* loop count */
  75                 iterations = atoi(opt->value);
  76                 break;
  77             case 'h':
  78             default:
  79                 Help();
  80                 return 2;
  81         }
  82     }
  83     PL_DestroyOptState(opt);
  84
  85     shm = PR_OpenSharedMemory(SHM_NAME, sizeof(*counter_addr), 0, 0666);
  86     if (NULL == shm) {
  87         fprintf(stderr, "PR_OpenSharedMemory failed (%d, %d)\n",
  88                 PR_GetError(), PR_GetOSError());
  89         exit(1);
  90     }
  91     sem1 = PR_OpenSemaphore(SEM_NAME1, 0, 0, 0);
  92     if (NULL == sem1) {
  93         fprintf(stderr, "PR_OpenSemaphore failed (%d, %d)\n",
  94                 PR_GetError(), PR_GetOSError());
  95         exit(1);
  96     }
  97     sem2 = PR_OpenSemaphore(SEM_NAME2, 0, 0, 0);
  98     if (NULL == sem2) {
  99         fprintf(stderr, "PR_OpenSemaphore failed (%d, %d)\n",
 100                 PR_GetError(), PR_GetOSError());
 101         exit(1);
 102     }
 103
 104     counter_addr = PR_AttachSharedMemory(shm, 0);
 105     if (NULL == counter_addr) {
 106         fprintf(stderr, "PR_AttachSharedMemory failed\n");
 107         exit(1);
 108     }
 109
 110     /*
 111      * Process 2 waits on semaphore 2 and posts to semaphore 1.
 112      */
 113     for (i = 0; i < iterations; i++) {
 114         if (PR_WaitSemaphore(sem2) == PR_FAILURE) {
 115             fprintf(stderr, "PR_WaitSemaphore failed\n");
 116             exit(1);
 117         }
 118         if (*counter_addr == 2*i+1) {
 119             if (debug_mode) printf("process 2: counter = %d\n", *counter_addr);
 120         } else {
 121             fprintf(stderr, "process 2: counter should be %d but is %d\n",
 122                     2*i+1, *counter_addr);
 123             exit(1);
 124         }
 125         (*counter_addr)++;
 126         if (PR_PostSemaphore(sem1) == PR_FAILURE) {
 127             fprintf(stderr, "PR_PostSemaphore failed\n");
 128             exit(1);
 129         }
 130     }
 131     if (PR_DetachSharedMemory(shm, counter_addr) == PR_FAILURE) {
 132         fprintf(stderr, "PR_DetachSharedMemory failed\n");
 133         exit(1);
 134     }
 135     if (PR_CloseSharedMemory(shm) == PR_FAILURE) {
 136         fprintf(stderr, "PR_CloseSharedMemory failed\n");
 137         exit(1);
 138     }
 139     if (PR_CloseSemaphore(sem1) == PR_FAILURE) {
 140         fprintf(stderr, "PR_CloseSemaphore failed\n");
 141     }
 142     if (PR_CloseSemaphore(sem2) == PR_FAILURE) {
 143         fprintf(stderr, "PR_CloseSemaphore failed\n");
 144     }
 145     printf("PASS\n");
 146     return 0;
 147 }