nptl/sysdeps/pthread/tst-timer.c

   1 /* Tests for POSIX timer implementation.
   2    Copyright (C) 2000, 2002, 2003 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Kaz Kylheku <kaz@ashi.footprints.net>.
   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 License as
   8    published by the Free Software Foundation; either version 2.1 of the
   9    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; see the file COPYING.LIB.  If not,
  18    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include <errno.h>
  22 #include <signal.h>
  23 #include <stdio.h>
  24 #include <time.h>
  25 #include <unistd.h>
  26
  27
  28 static void
  29 notify_func1 (union sigval sigval)
  30 {
  31   puts ("notify_func1");
  32 }
  33
  34
  35 static void
  36 notify_func2 (union sigval sigval)
  37 {
  38   puts ("notify_func2");
  39 }
  40
  41
  42 static void
  43 signal_func (int sig)
  44 {
  45   static const char text[] = "signal_func\n";
  46   signal (sig, signal_func);
  47   write (STDOUT_FILENO, text, sizeof text - 1);
  48 }
  49
  50 static void
  51 intr_sleep (int sec)
  52 {
  53   struct timespec ts;
  54
  55   ts.tv_sec = sec;
  56   ts.tv_nsec = 0;
  57
  58   while (nanosleep (&ts, &ts) == -1 && errno == EINTR)
  59     ;
  60 }
  61
  62 #define ZSIGALRM 14
  63
  64
  65 int
  66 main (void)
  67 {
  68   struct timespec ts;
  69   timer_t timer_sig, timer_thr1, timer_thr2;
  70   int retval;
  71   struct sigevent sigev1 =
  72   {
  73     .sigev_notify = SIGEV_SIGNAL,
  74     .sigev_signo = ZSIGALRM
  75   };
  76   struct sigevent sigev2;
  77   struct itimerspec itimer1 = { { 0, 200000000 }, { 0, 200000000 } };
  78   struct itimerspec itimer2 = { { 0, 100000000 }, { 0, 500000000 } };
  79   struct itimerspec itimer3 = { { 0, 150000000 }, { 0, 300000000 } };
  80   struct itimerspec old;
  81
  82   retval = clock_gettime (CLOCK_REALTIME, &ts);
  83
  84   sigev2.sigev_notify = SIGEV_THREAD;
  85   sigev2.sigev_notify_function = notify_func1;
  86   sigev2.sigev_notify_attributes = NULL;
  87   /* It is unnecessary to do the following but to set a good example
  88      we do it anyhow.  */
  89   sigev2.sigev_value.sival_ptr = NULL;
  90
  91   setvbuf (stdout, 0, _IOLBF, 0);
  92
  93   printf ("clock_gettime returned %d, timespec = { %ld, %ld }\n",
  94           retval, ts.tv_sec, ts.tv_nsec);
  95
  96   retval = clock_getres (CLOCK_REALTIME, &ts);
  97
  98   printf ("clock_getres returned %d, timespec = { %ld, %ld }\n",
  99           retval, ts.tv_sec, ts.tv_nsec);
 100
 101   if (timer_create (CLOCK_REALTIME, &sigev1, &timer_sig) != 0)
 102     {
 103       printf ("timer_create for timer_sig failed: %m\n");
 104       exit (1);
 105     }
 106   if (timer_create (CLOCK_REALTIME, &sigev2, &timer_thr1) != 0)
 107     {
 108       printf ("timer_create for timer_thr1 failed: %m\n");
 109       exit (1);
 110     }
 111   sigev2.sigev_notify_function = notify_func2;
 112   if (timer_create (CLOCK_REALTIME, &sigev2, &timer_thr2) != 0)
 113     {
 114       printf ("timer_create for timer_thr2 failed: %m\n");
 115       exit (1);
 116     }
 117
 118   if (timer_settime (timer_thr1, 0, &itimer2, &old) != 0)
 119     {
 120       printf ("timer_settime for timer_thr1 failed: %m\n");
 121       exit (1);
 122     }
 123   if (timer_settime (timer_thr2, 0, &itimer3, &old) != 0)
 124     {
 125       printf ("timer_settime for timer_thr2 failed: %m\n");
 126       exit (1);
 127     }
 128
 129   signal (ZSIGALRM, signal_func);
 130
 131   if (timer_settime (timer_sig, 0, &itimer1, &old) != 0)
 132     {
 133       printf ("timer_settime for timer_sig failed: %m\n");
 134       exit (1);
 135     }
 136
 137   intr_sleep (3);
 138
 139   if (timer_delete (timer_sig) != 0)
 140     {
 141       printf ("timer_delete for timer_sig failed: %m\n");
 142       exit (1);
 143     }
 144   if (timer_delete (timer_thr1) != 0)
 145     {
 146       printf ("timer_delete for timer_thr1 failed: %m\n");
 147       exit (1);
 148     }
 149
 150   intr_sleep (3);
 151
 152   if (timer_delete (timer_thr2) != 0)
 153     {
 154       printf ("timer_delete for timer_thr2 failed: %m\n");
 155       exit (1);
 156     }
 157
 158   return 0;
 159 }