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namedmutextest.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     pid_t child = (pid_t) -1;
00089     int i;
00090     StmNamedMutex mutex = stmNamedMutexCreate
00091     (
00092         argc == 1 ? "TestNamedMutex%p" : argv [1],
00093         StmFalse,
00094         StmAttach
00095     );
00096     if (!mutex)
00097     {
00098         printf ("Process %d: stmNamedMutexCreate failed: %s\n",
00099                 getpid (), strerror (errno));
00100         exit (1);
00101     }
00102     if (argc == 1)
00103     {
00104         char *const childArgv [] =
00105         {
00106             argv [0],
00107             (char *) stmNamedMutexName (mutex),
00108             NULL
00109         };
00110         if ((child = stmProcessSpawn (argv [0], childArgv, StmFalse)) < 0)
00111         {
00112             printf ("%s: stmProcessSpawn failed: %s\n",
00113                     argv [0], strerror (errno));
00114             exit (1);
00115         }
00116     }
00117     for (i = 0; i < 10; ++ i)
00118     {
00119         if (stmNamedMutexLock (mutex))
00120         {
00121             printf ("Process %d: stmNamedMutexLock failed: %s\n",
00122                     getpid (), strerror (errno));
00123         }
00124         else
00125         {
00126             printf ("This is process %d\n", getpid ());
00127             stmNamedMutexUnlock (mutex);
00128             stmSleepMs (5);
00129         }
00130     }
00131     stmNamedMutexDestroy (mutex);
00132     if (child > 0)
00133     {
00134         stmProcessWait (child, NULL);
00135     }
00136     return 0;
00137 }
00138 
00139 

© Copyright Tom Michaelis 2002-2007

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