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semaphoretest.c

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00001 /* ***** BEGIN LICENSE BLOCK *****
00002  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00003  *
00004  * The contents of this file are subject to the Mozilla Public License Version
00005  * 1.1 (the "License"); you may not use this file except in compliance with
00006  * the License. You may obtain a copy of the License at
00007  * http://www.mozilla.org/MPL/
00008  *
00009  * Software distributed under the License is distributed on an "AS IS" basis,
00010  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00011  * for the specific language governing rights and limitations under the
00012  * License.
00013  *
00014  * The Original Code is the SysToMath C Libraries package (LibStmC).
00015  *
00016  * The Initial Developer of the Original Code is
00017  * Tom Michaelis, SysToMath.
00018  * Portions created by the Initial Developer are Copyright (C) 1994-2006
00019  * the Initial Developer. All Rights Reserved.
00020  *
00021  * Contributor(s):
00022  *
00023  * Alternatively, the contents of this file may be used under the terms of
00024  * either the GNU General Public License Version 2 or later (the "GPL"), or
00025  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00026  * in which case the provisions of the GPL or the LGPL are applicable instead
00027  * of those above. If you wish to allow use of your version of this file only
00028  * under the terms of either the GPL or the LGPL, and not to allow others to
00029  * use your version of this file under the terms of the MPL, indicate your
00030  * decision by deleting the provisions above and replace them with the notice
00031  * and other provisions required by the GPL or the LGPL. If you do not delete
00032  * the provisions above, a recipient may use your version of this file under
00033  * the terms of any one of the MPL, the GPL or the LGPL.
00034  *
00035  * ***** END LICENSE BLOCK ***** */
00036 
00037 /******************************************************************************
00038  *                       First Release 1994-07-20
00039  ******************************************************************************/
00040 
00041 
00069 #include <stdio.h>
00070 #include <string.h>
00071 #include <errno.h>
00072 #include <stm/system.h>
00073 
00086 int main (int argc, char **argv)
00087 {
00088     struct
00089     {
00090         StmSemaphore semaphore;
00091         char *msg;
00092     }
00093     data [] =
00094     {
00095         {
00096             NULL,
00097             "Ping"
00098         },
00099         {
00100             NULL,
00101             "Pong"
00102         }
00103     };
00104     int i, j, k;
00105     char suff [16];
00106     char name [32];
00107     if (argc == 1)
00108     {
00109         char *const childArgv [] = {argv [0], suff, NULL};
00110         sprintf (suff, "%d", getpid ());
00111         if (stmProcessSpawn (argv [0], childArgv, StmFalse) < 0)
00112         {
00113             printf ("%s: stmProcessSpawn failed: %s\n",
00114                     argv [0], strerror (errno));
00115             exit (1);
00116         }
00117         j = 0;
00118     }
00119     else
00120     {
00121         strcpy (suff, argv [1]);
00122         j = 1;
00123     }
00124     for (k = 0; k < 2; ++ k)
00125     {
00126         sprintf (name, "TestSemaphore%s%s", data [k].msg, suff);
00127         if (! (data [k].semaphore = stmSemaphoreCreate (name, 1 - k, StmAttach)))
00128         {
00129             printf ("Process %d: stmSemaphoreCreate for '%s' failed: %s\n",
00130                     getpid (), name, strerror (errno));
00131         }
00132     }
00133     for (i = 0; i < 10; ++ i)
00134     {
00135         if (stmSemaphoreTimedAcquire (data [j].semaphore, stmGetMsTime () + 500))
00136         {
00137             printf ("Process %d: stmSemaphoreAcquire for '%s' failed: %s\n",
00138                     getpid (), stmSemaphoreName (data [j].semaphore), strerror (errno));
00139             exit (1);
00140         }
00141         printf ("Process %d: %s\n", getpid (), data [j].msg);
00142         if (stmSemaphoreRelease (data [1 - j].semaphore))
00143         {
00144             printf ("Process %d: stmSemaphoreRelease for '%s' failed: %s\n",
00145                     getpid (), stmSemaphoreName (data [1 - j].semaphore), strerror (errno));
00146             exit (1);
00147         }
00148     }
00149     stmSemaphoreDestroy (data [0].semaphore);
00150     stmSemaphoreDestroy (data [1].semaphore);
00151     return 0;
00152 }
00153 
00154 

© Copyright Tom Michaelis 2002-2007

Distributed under the SysToMath Software License (See the accompanying file license.txt or a copy at www.SysToMath.com).