sysdeps/pthread/tst-cond5.c

   1 /* Copyright (C) 2002-2023 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <pthread.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <time.h>
  24 #include <sys/time.h>
  25
  26
  27 static pthread_mutex_t mut;
  28 static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
  29
  30
  31 static int
  32 do_test (void)
  33 {
  34   pthread_mutexattr_t ma;
  35   int err;
  36   struct timespec ts;
  37   struct timeval tv;
  38
  39   if (pthread_mutexattr_init (&ma) != 0)
  40     {
  41       puts ("mutexattr_init failed");
  42       exit (1);
  43     }
  44
  45   if (pthread_mutexattr_settype (&ma, PTHREAD_MUTEX_ERRORCHECK) != 0)
  46     {
  47       puts ("mutexattr_settype failed");
  48       exit (1);
  49     }
  50
  51   if (pthread_mutex_init (&mut, &ma) != 0)
  52     {
  53       puts ("mutex_init failed");
  54       exit (1);
  55     }
  56
  57   /* Get the mutex.  */
  58   if (pthread_mutex_lock (&mut) != 0)
  59     {
  60       puts ("mutex_lock failed");
  61       exit (1);
  62     }
  63
  64   /* Waiting for the condition will fail.  But we want the timeout here.  */
  65   if (gettimeofday (&tv, NULL) != 0)
  66     {
  67       puts ("gettimeofday failed");
  68       exit (1);
  69     }
  70
  71   TIMEVAL_TO_TIMESPEC (&tv, &ts);
  72   ts.tv_nsec += 500000000;
  73   if (ts.tv_nsec >= 1000000000)
  74     {
  75       ts.tv_nsec -= 1000000000;
  76       ++ts.tv_sec;
  77     }
  78   err = pthread_cond_timedwait (&cond, &mut, &ts);
  79   if (err == 0)
  80     {
  81       /* This could in theory happen but here without any signal and
  82          additional waiter it should not.  */
  83       puts ("cond_timedwait succeeded");
  84       exit (1);
  85     }
  86   else if (err != ETIMEDOUT)
  87     {
  88       printf ("cond_timedwait returned with %s\n", strerror (err));
  89       exit (1);
  90     }
  91
  92   err = pthread_mutex_unlock (&mut);
  93   if (err != 0)
  94     {
  95       printf ("mutex_unlock failed: %s\n", strerror (err));
  96       exit (1);
  97     }
  98
  99   return 0;
 100 }
 101
 102
 103 #define TEST_FUNCTION do_test ()
 104 #include "../test-skeleton.c"