nptl/tst-cancel14.c

   1 /* Test sem_timedwait cancellation for uncontended case.
   2    Copyright (C) 2003-2020 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <https://www.gnu.org/licenses/>.  */
  19
  20 #include <errno.h>
  21 #include <pthread.h>
  22 #include <semaphore.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <unistd.h>
  27 #include <sys/time.h>
  28
  29
  30 static pthread_barrier_t bar;
  31 static sem_t sem;
  32
  33
  34 static void
  35 cleanup (void *arg)
  36 {
  37   static int ncall;
  38
  39   if (++ncall != 1)
  40     {
  41       puts ("second call to cleanup");
  42       exit (1);
  43     }
  44 }
  45
  46
  47 static void *
  48 tf (void *arg)
  49 {
  50   pthread_cleanup_push (cleanup, NULL);
  51
  52   int e = pthread_barrier_wait (&bar);
  53   if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
  54     {
  55       puts ("error: tf: 1st barrier_wait failed");
  56       exit (1);
  57     }
  58
  59   struct timeval tv;
  60   (void) gettimeofday (&tv, NULL);
  61
  62   struct timespec ts;
  63   TIMEVAL_TO_TIMESPEC (&tv, &ts);
  64
  65   /* Timeout in 5 seconds.  */
  66   ts.tv_sec += 5;
  67
  68   /* This call should block and be cancelable.  */
  69   sem_timedwait (&sem, &ts);
  70
  71   pthread_cleanup_pop (0);
  72
  73   return NULL;
  74 }
  75
  76
  77 static int
  78 do_test (void)
  79 {
  80   pthread_t th;
  81
  82   if (pthread_barrier_init (&bar, NULL, 2) != 0)
  83     {
  84       puts ("error: barrier_init failed");
  85       exit (1);
  86     }
  87
  88   if (sem_init (&sem, 0, 1) != 0)
  89     {
  90       puts ("error: sem_init failed");
  91       exit (1);
  92     }
  93
  94   if (pthread_create (&th, NULL, tf, NULL) != 0)
  95     {
  96       puts ("error: create failed");
  97       exit (1);
  98     }
  99
 100   /* Check whether cancellation is honored even before sem_timedwait does
 101      anything.  */
 102   if (pthread_cancel (th) != 0)
 103     {
 104       puts ("error: 1st cancel failed");
 105       exit (1);
 106     }
 107
 108   int e = pthread_barrier_wait (&bar);
 109   if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
 110     {
 111       puts ("1st barrier_wait failed");
 112       exit (1);
 113     }
 114
 115   void *r;
 116   if (pthread_join (th, &r) != 0)
 117     {
 118       puts ("join failed");
 119       exit (1);
 120     }
 121
 122   if (r != PTHREAD_CANCELED)
 123     {
 124       puts ("thread not canceled");
 125       exit (1);
 126     }
 127
 128   return 0;
 129 }
 130
 131
 132 #define TEST_FUNCTION do_test ()
 133 #include "../test-skeleton.c"