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glibc  2.9
tst-sem5.c
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00001 /* Copyright (C) 2002, 2003 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 <errno.h>
00021 #include <semaphore.h>
00022 #include <stdio.h>
00023 #include <time.h>
00024 #include <unistd.h>
00025 #include <sys/time.h>
00026 
00027 
00028 static int
00029 do_test (void)
00030 {
00031   sem_t s;
00032   struct timespec ts;
00033   struct timeval tv;
00034 
00035   if (sem_init (&s, 0, 1) == -1)
00036     {
00037       puts ("sem_init failed");
00038       return 1;
00039     }
00040 
00041   if (TEMP_FAILURE_RETRY (sem_wait (&s)) == -1)
00042     {
00043       puts ("sem_wait failed");
00044       return 1;
00045     }
00046 
00047   if (gettimeofday (&tv, NULL) != 0)
00048     {
00049       puts ("gettimeofday failed");
00050       return 1;
00051     }
00052 
00053   TIMEVAL_TO_TIMESPEC (&tv, &ts);
00054 
00055   /* We wait for half a second.  */
00056   ts.tv_nsec += 500000000;
00057   if (ts.tv_nsec >= 1000000000)
00058     {
00059       ++ts.tv_sec;
00060       ts.tv_nsec -= 1000000000;
00061     }
00062 
00063   errno = 0;
00064   if (TEMP_FAILURE_RETRY (sem_timedwait (&s, &ts)) != -1)
00065     {
00066       puts ("sem_timedwait succeeded");
00067       return 1;
00068     }
00069   if (errno != ETIMEDOUT)
00070     {
00071       printf ("sem_timedwait return errno = %d instead of ETIMEDOUT\n",
00072              errno);
00073       return 1;
00074     }
00075 
00076   return 0;
00077 }
00078 
00079 #define TEST_FUNCTION do_test ()
00080 #include "../test-skeleton.c"