htl/tests/test-13.c

   1 /* Test condition attributes and pthread_cond_timedwait.
   2    Copyright (C) 2000-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library;  if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #define _GNU_SOURCE
  20
  21 #include <pthread.h>
  22 #include <stdio.h>
  23 #include <assert.h>
  24 #include <error.h>
  25 #include <errno.h>
  26 #include <sys/time.h>
  27
  28 int
  29 main (int argc, char **argv)
  30 {
  31   error_t err;
  32   int i;
  33   pthread_condattr_t attr;
  34   pthread_cond_t cond;
  35   struct timespec ts;
  36   pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
  37   struct timeval before, after;
  38   int diff;
  39
  40   err = pthread_condattr_init (&attr);
  41   if (err)
  42     error (1, err, "pthread_condattr_init");
  43
  44   err = pthread_condattr_getpshared (&attr, &i);
  45   if (err)
  46     error (1, err, "pthread_condattr_getpshared");
  47   assert (i == PTHREAD_PROCESS_PRIVATE);
  48
  49   err = pthread_condattr_setpshared (&attr, PTHREAD_PROCESS_PRIVATE);
  50   assert (err == 0);
  51
  52   err = pthread_cond_init (&cond, &attr);
  53   if (err)
  54     error (1, err, "pthread_cond_init");
  55
  56   err = pthread_condattr_destroy (&attr);
  57   if (err)
  58     error (1, err, "pthread_condattr_destroy");
  59
  60   gettimeofday (&before, 0);
  61   ts.tv_sec = before.tv_sec + 1;
  62   ts.tv_nsec = before.tv_usec * 1000;
  63
  64   printf ("Starting wait @ %d\n", (int) before.tv_sec);
  65
  66   pthread_mutex_lock (&m);
  67   err = pthread_cond_timedwait (&cond, &m, &ts);
  68
  69   gettimeofday (&after, 0);
  70
  71   printf ("End wait @ %d (err = %d)\n", (int) after.tv_sec, err);
  72
  73   assert (err == ETIMEDOUT);
  74
  75   diff = after.tv_sec * 1000000 + after.tv_usec
  76       - before.tv_sec * 1000000 - before.tv_usec;
  77
  78   if (diff < 900000 || diff > 1100000)
  79     error (1, EGRATUITOUS, "pthread_cond_timedwait waited %d us", diff);
  80
  81   return 0;
  82 }