sysdeps/pthread/tst-timer.c

   1 /* Tests for POSIX timer implementation.
   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 License as
   7    published by the Free Software Foundation; either version 2.1 of the
   8    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; see the file COPYING.LIB.  If
  17    not, see <https://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <signal.h>
  21 #include <stdio.h>
  22 #include <time.h>
  23 #include <unistd.h>
  24 #include <stdlib.h>
  25 #include <stdint.h>
  26
  27 #include <support/xunistd.h>
  28
  29 static void
  30 notify_func1 (union sigval sigval)
  31 {
  32   puts ("notify_func1");
  33 }
  34
  35
  36 static void
  37 notify_func2 (union sigval sigval)
  38 {
  39   puts ("notify_func2");
  40 }
  41
  42
  43 static void
  44 signal_func (int sig)
  45 {
  46   static const char text[] = "signal_func\n";
  47   signal (sig, signal_func);
  48   xwrite (STDOUT_FILENO, text, sizeof text - 1);
  49 }
  50
  51 static void
  52 intr_sleep (int sec)
  53 {
  54   struct timespec ts;
  55
  56   ts.tv_sec = sec;
  57   ts.tv_nsec = 0;
  58
  59   while (nanosleep (&ts, &ts) == -1 && errno == EINTR)
  60     ;
  61 }
  62
  63 #define ZSIGALRM 14
  64
  65
  66 int
  67 main (void)
  68 {
  69   struct timespec ts;
  70   timer_t timer_sig, timer_thr1, timer_thr2;
  71   int retval;
  72   struct sigevent sigev1 =
  73   {
  74     .sigev_notify = SIGEV_SIGNAL,
  75     .sigev_signo = ZSIGALRM
  76   };
  77   struct sigevent sigev2;
  78   struct itimerspec itimer1 = { { 0, 200000000 }, { 0, 200000000 } };
  79   struct itimerspec itimer2 = { { 0, 100000000 }, { 0, 500000000 } };
  80   struct itimerspec itimer3 = { { 0, 150000000 }, { 0, 300000000 } };
  81   struct itimerspec old;
  82
  83   retval = clock_gettime (CLOCK_REALTIME, &ts);
  84
  85   sigev2.sigev_notify = SIGEV_THREAD;
  86   sigev2.sigev_notify_function = notify_func1;
  87   sigev2.sigev_notify_attributes = NULL;
  88   /* It is unnecessary to do the following but to set a good example
  89      we do it anyhow.  */
  90   sigev2.sigev_value.sival_ptr = NULL;
  91
  92   setvbuf (stdout, 0, _IOLBF, 0);
  93
  94   printf ("clock_gettime returned %d, timespec = { %jd, %jd }\n",
  95           retval, (intmax_t) ts.tv_sec, (intmax_t) ts.tv_nsec);
  96
  97   retval = clock_getres (CLOCK_REALTIME, &ts);
  98
  99   printf ("clock_getres returned %d, timespec = { %jd, %jd }\n",
 100           retval, (intmax_t) ts.tv_sec, (intmax_t) ts.tv_nsec);
 101
 102   if (timer_create (CLOCK_REALTIME, &sigev1, &timer_sig) != 0)
 103     {
 104       printf ("timer_create for timer_sig failed: %m\n");
 105       exit (1);
 106     }
 107   if (timer_create (CLOCK_REALTIME, &sigev2, &timer_thr1) != 0)
 108     {
 109       printf ("timer_create for timer_thr1 failed: %m\n");
 110       exit (1);
 111     }
 112   sigev2.sigev_notify_function = notify_func2;
 113   if (timer_create (CLOCK_REALTIME, &sigev2, &timer_thr2) != 0)
 114     {
 115       printf ("timer_create for timer_thr2 failed: %m\n");
 116       exit (1);
 117     }
 118
 119   if (timer_settime (timer_thr1, 0, &itimer2, &old) != 0)
 120     {
 121       printf ("timer_settime for timer_thr1 failed: %m\n");
 122       exit (1);
 123     }
 124   if (timer_settime (timer_thr2, 0, &itimer3, &old) != 0)
 125     {
 126       printf ("timer_settime for timer_thr2 failed: %m\n");
 127       exit (1);
 128     }
 129
 130   signal (ZSIGALRM, signal_func);
 131
 132   if (timer_settime (timer_sig, 0, &itimer1, &old) != 0)
 133     {
 134       printf ("timer_settime for timer_sig failed: %m\n");
 135       exit (1);
 136     }
 137
 138   intr_sleep (3);
 139
 140   if (timer_delete (timer_sig) != 0)
 141     {
 142       printf ("timer_delete for timer_sig failed: %m\n");
 143       exit (1);
 144     }
 145   if (timer_delete (timer_thr1) != 0)
 146     {
 147       printf ("timer_delete for timer_thr1 failed: %m\n");
 148       exit (1);
 149     }
 150
 151   intr_sleep (3);
 152
 153   if (timer_delete (timer_thr2) != 0)
 154     {
 155       printf ("timer_delete for timer_thr2 failed: %m\n");
 156       exit (1);
 157     }
 158
 159   return 0;
 160 }