Back to index

glibc  2.9
tst-rwlock5.c
Go to the documentation of this file.
00001 /* Copyright (C) 2002 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #include <pthread.h>
00021 #include <signal.h>
00022 #include <stdio.h>
00023 #include <stdlib.h>
00024 #include <unistd.h>
00025 
00026 
00027 static pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
00028 static pthread_rwlock_t r;
00029 
00030 
00031 static void *
00032 tf (void *arg)
00033 {
00034   if (pthread_rwlock_wrlock (&r) == 0)
00035     {
00036       puts ("child: rwlock_wrlock succeeded");
00037       exit (1);
00038     }
00039 
00040   puts ("child: rwlock_wrlock returned");
00041 
00042   exit (1);
00043 }
00044 
00045 
00046 static int
00047 do_test (void)
00048 {
00049   pthread_t th;
00050 
00051   if (pthread_rwlock_init (&r, NULL) != 0)
00052     {
00053       puts ("rwlock_init failed");
00054       return 1;
00055     }
00056 
00057   if (pthread_rwlock_wrlock (&r) != 0)
00058     {
00059       puts ("rwlock_wrlock failed");
00060       return 1;
00061     }
00062 
00063   if (pthread_mutex_lock (&m) != 0)
00064     {
00065       puts ("mutex_lock failed");
00066       return 1;
00067     }
00068 
00069   /* Set an alarm for 1 second.  The wrapper will expect this.  */
00070   alarm (1);
00071 
00072   if (pthread_create (&th, NULL, tf, NULL) != 0)
00073     {
00074       puts ("create failed");
00075       return 1;
00076     }
00077 
00078   /* This call should never return.  */
00079   pthread_mutex_lock (&m);
00080 
00081   puts ("2nd mutex_lock returned");
00082   return 1;
00083 }
00084 
00085 #define EXPECTED_SIGNAL SIGALRM
00086 #define TEST_FUNCTION do_test ()
00087 #include "../test-skeleton.c"