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glibc  2.9
tst-clock_nanosleep.c
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00001 /* Copyright (C) 2003 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #include <errno.h>
00020 #include <stdio.h>
00021 #include <unistd.h>
00022 #include <sys/time.h>
00023 #include <time.h>
00024 
00025 
00026 /* Test that clock_nanosleep() does sleep.  */
00027 static int
00028 do_test (void)
00029 {
00030   /* Current time.  */
00031   struct timeval tv1;
00032   (void) gettimeofday (&tv1, NULL);
00033 
00034   struct timespec ts;
00035   ts.tv_sec = 1;
00036   ts.tv_nsec = 0;
00037   TEMP_FAILURE_RETRY (clock_nanosleep (CLOCK_REALTIME, 0, &ts, &ts));
00038 
00039   /* At least one second must have passed.  */
00040   struct timeval tv2;
00041   (void) gettimeofday (&tv2, NULL);
00042 
00043   tv2.tv_sec -= tv1.tv_sec;
00044   tv2.tv_usec -= tv1.tv_usec;
00045   if (tv2.tv_usec < 0)
00046     --tv2.tv_sec;
00047 
00048   if (tv2.tv_sec < 1)
00049     {
00050       puts ("clock_nanosleep didn't sleep long enough");
00051       return 1;
00052     }
00053 
00054   return 0;
00055 }
00056 
00057 #define TEST_FUNCTION do_test ()
00058 #include "../test-skeleton.c"