nsprpub/pr/tests/semaping.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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  30  * use your version of this file under the terms of the MPL, indicate your
  31  * decision by deleting the provisions above and replace them with the notice
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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 SEM_MODE  0666
  47 #define SHM_MODE  0666
  48 #define ITERATIONS 1000
  49
  50 static PRBool debug_mode = PR_FALSE;
  51 static PRIntn iterations = ITERATIONS;
  52 static PRSem *sem1, *sem2;
  53
  54 static void Help(void)
  55 {
  56     fprintf(stderr, "semaping test program usage:\n");
  57     fprintf(stderr, "\t-d           debug mode         (FALSE)\n");
  58     fprintf(stderr, "\t-c <count>   loop count         (%d)\n", ITERATIONS);
  59     fprintf(stderr, "\t-h           this message\n");
  60 }  /* Help */
  61
  62 int main(int argc, char **argv)
  63 {
  64     PRProcess *proc;
  65     PRIntn i;
  66     char *child_argv[32];
  67     char **child_arg;
  68     char iterations_buf[32];
  69     PRSharedMemory *shm;
  70     PRIntn *counter_addr;
  71     PRInt32 exit_code;
  72     PLOptStatus os;
  73     PLOptState *opt = PL_CreateOptState(argc, argv, "dc:h");
  74
  75     while (PL_OPT_EOL != (os = PL_GetNextOpt(opt))) {
  76         if (PL_OPT_BAD == os) continue;
  77         switch (opt->option) {
  78             case 'd':  /* debug mode */
  79                 debug_mode = PR_TRUE;
  80                 break;
  81             case 'c':  /* loop count */
  82                 iterations = atoi(opt->value);
  83                 break;
  84             case 'h':
  85             default:
  86                 Help();
  87                 return 2;
  88         }
  89     }
  90     PL_DestroyOptState(opt);
  91
  92     if (PR_DeleteSharedMemory(SHM_NAME) == PR_SUCCESS) {
  93         fprintf(stderr, "warning: removed shared memory %s left over "
  94                 "from previous run\n", SHM_NAME);
  95     }
  96     if (PR_DeleteSemaphore(SEM_NAME1) == PR_SUCCESS) {
  97         fprintf(stderr, "warning: removed semaphore %s left over "
  98                 "from previous run\n", SEM_NAME1);
  99     }
 100     if (PR_DeleteSemaphore(SEM_NAME2) == PR_SUCCESS) {
 101         fprintf(stderr, "warning: removed semaphore %s left over "
 102                 "from previous run\n", SEM_NAME2);
 103     }
 104
 105     shm = PR_OpenSharedMemory(SHM_NAME, sizeof(*counter_addr), PR_SHM_CREATE, SHM_MODE);
 106     if (NULL == shm) {
 107         fprintf(stderr, "PR_OpenSharedMemory failed (%d, %d)\n",
 108                 PR_GetError(), PR_GetOSError());
 109         exit(1);
 110     }
 111     counter_addr = PR_AttachSharedMemory(shm, 0);
 112     if (NULL == counter_addr) {
 113         fprintf(stderr, "PR_AttachSharedMemory failed\n");
 114         exit(1);
 115     }
 116     *counter_addr = 0;
 117     sem1 = PR_OpenSemaphore(SEM_NAME1, PR_SEM_CREATE, SEM_MODE, 1);
 118     if (NULL == sem1) {
 119         fprintf(stderr, "PR_OpenSemaphore failed (%d, %d)\n",
 120                 PR_GetError(), PR_GetOSError());
 121         exit(1);
 122     }
 123     sem2 = PR_OpenSemaphore(SEM_NAME2, PR_SEM_CREATE, SEM_MODE, 0);
 124     if (NULL == sem2) {
 125         fprintf(stderr, "PR_OpenSemaphore failed (%d, %d)\n",
 126                 PR_GetError(), PR_GetOSError());
 127         exit(1);
 128     }
 129
 130     child_arg = &child_argv[0];
 131     *child_arg++ = "semapong";
 132     if (debug_mode != PR_FALSE) {
 133         *child_arg++ = "-d";
 134     }
 135     if (iterations != ITERATIONS) {
 136         *child_arg++ = "-c";
 137         PR_snprintf(iterations_buf, sizeof(iterations_buf), "%d", iterations);
 138         *child_arg++ = iterations_buf;
 139     }
 140     *child_arg = NULL;
 141     proc = PR_CreateProcess(child_argv[0], child_argv, NULL, NULL);
 142     if (NULL == proc) {
 143         fprintf(stderr, "PR_CreateProcess failed\n");
 144         exit(1);
 145     }
 146
 147     /*
 148      * Process 1 waits on semaphore 1 and posts to semaphore 2.
 149      */
 150     for (i = 0; i < iterations; i++) {
 151         if (PR_WaitSemaphore(sem1) == PR_FAILURE) {
 152             fprintf(stderr, "PR_WaitSemaphore failed\n");
 153             exit(1);
 154         }
 155         if (*counter_addr == 2*i) {
 156             if (debug_mode) printf("process 1: counter = %d\n", *counter_addr);
 157         } else {
 158             fprintf(stderr, "process 1: counter should be %d but is %d\n",
 159                     2*i, *counter_addr);
 160             exit(1);
 161         }
 162         (*counter_addr)++;
 163         if (PR_PostSemaphore(sem2) == PR_FAILURE) {
 164             fprintf(stderr, "PR_PostSemaphore failed\n");
 165             exit(1);
 166         }
 167     }
 168     if (PR_DetachSharedMemory(shm, counter_addr) == PR_FAILURE) {
 169         fprintf(stderr, "PR_DetachSharedMemory failed\n");
 170         exit(1);
 171     }
 172     if (PR_CloseSharedMemory(shm) == PR_FAILURE) {
 173         fprintf(stderr, "PR_CloseSharedMemory failed\n");
 174         exit(1);
 175     }
 176     if (PR_CloseSemaphore(sem1) == PR_FAILURE) {
 177         fprintf(stderr, "PR_CloseSemaphore failed\n");
 178     }
 179     if (PR_CloseSemaphore(sem2) == PR_FAILURE) {
 180         fprintf(stderr, "PR_CloseSemaphore failed\n");
 181     }
 182
 183     if (PR_WaitProcess(proc, &exit_code) == PR_FAILURE) {
 184         fprintf(stderr, "PR_WaitProcess failed\n");
 185         exit(1);
 186     }
 187     if (exit_code != 0) {
 188         fprintf(stderr, "process 2 failed with exit code %d\n", exit_code);
 189         exit(1);
 190     }
 191
 192     if (PR_DeleteSharedMemory(SHM_NAME) == PR_FAILURE) {
 193         fprintf(stderr, "PR_DeleteSharedMemory failed\n");
 194     }
 195     if (PR_DeleteSemaphore(SEM_NAME1) == PR_FAILURE) {
 196         fprintf(stderr, "PR_DeleteSemaphore failed\n");
 197     }
 198     if (PR_DeleteSemaphore(SEM_NAME2) == PR_FAILURE) {
 199         fprintf(stderr, "PR_DeleteSemaphore failed\n");
 200     }
 201     printf("PASS\n");
 202     return 0;
 203 }