sysdeps/pthread/tst-cancel14.c

   1 /* Test sem_timedwait cancellation for uncontended case.
   2    Copyright (C) 2003-2023 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 #include <errno.h>
  20 #include <pthread.h>
  21 #include <semaphore.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <unistd.h>
  26 #include <sys/time.h>
  27
  28
  29 static pthread_barrier_t bar;
  30 static sem_t sem;
  31
  32
  33 static void
  34 cleanup (void *arg)
  35 {
  36   static int ncall;
  37
  38   if (++ncall != 1)
  39     {
  40       puts ("second call to cleanup");
  41       exit (1);
  42     }
  43 }
  44
  45
  46 static void *
  47 tf (void *arg)
  48 {
  49   pthread_cleanup_push (cleanup, NULL);
  50
  51   int e = pthread_barrier_wait (&bar);
  52   if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
  53     {
  54       puts ("error: tf: 1st barrier_wait failed");
  55       exit (1);
  56     }
  57
  58   struct timeval tv;
  59   (void) gettimeofday (&tv, NULL);
  60
  61   struct timespec ts;
  62   TIMEVAL_TO_TIMESPEC (&tv, &ts);
  63
  64   /* Timeout in 5 seconds.  */
  65   ts.tv_sec += 5;
  66
  67   /* This call should block and be cancelable.  */
  68   sem_timedwait (&sem, &ts);
  69
  70   pthread_cleanup_pop (0);
  71
  72   return NULL;
  73 }
  74
  75
  76 static int
  77 do_test (void)
  78 {
  79   pthread_t th;
  80
  81   if (pthread_barrier_init (&bar, NULL, 2) != 0)
  82     {
  83       puts ("error: barrier_init failed");
  84       exit (1);
  85     }
  86
  87   if (sem_init (&sem, 0, 1) != 0)
  88     {
  89       puts ("error: sem_init failed");
  90       exit (1);
  91     }
  92
  93   if (pthread_create (&th, NULL, tf, NULL) != 0)
  94     {
  95       puts ("error: create failed");
  96       exit (1);
  97     }
  98
  99   /* Check whether cancellation is honored even before sem_timedwait does
 100      anything.  */
 101   if (pthread_cancel (th) != 0)
 102     {
 103       puts ("error: 1st cancel failed");
 104       exit (1);
 105     }
 106
 107   int e = pthread_barrier_wait (&bar);
 108   if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
 109     {
 110       puts ("1st barrier_wait failed");
 111       exit (1);
 112     }
 113
 114   void *r;
 115   if (pthread_join (th, &r) != 0)
 116     {
 117       puts ("join failed");
 118       exit (1);
 119     }
 120
 121   if (r != PTHREAD_CANCELED)
 122     {
 123       puts ("thread not canceled");
 124       exit (1);
 125     }
 126
 127   return 0;
 128 }
 129
 130
 131 #define TEST_FUNCTION do_test ()
 132 #include "../test-skeleton.c"