linuxthreads/sysdeps/pthread/tst-timer.c

   1 /* Tests for POSIX timer implementation.
   2    Copyright (C) 2000, 2002 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_func (union sigval sigval)
  30 {
  31   puts ("notify_func");
  32 }
  33
  34
  35 static void
  36 signal_func (int sig)
  37 {
  38   static const char text[] = "signal_func\n";
  39   signal (sig, signal_func);
  40   write (STDOUT_FILENO, text, sizeof text - 1);
  41 }
  42
  43 static void
  44 intr_sleep (int sec)
  45 {
  46   struct timespec ts;
  47
  48   ts.tv_sec = sec;
  49   ts.tv_nsec = 0;
  50
  51   while (nanosleep (&ts, &ts) == -1 && errno == EINTR)
  52     ;
  53 }
  54
  55 #define ZSIGALRM 14
  56
  57
  58 int
  59 main (void)
  60 {
  61   struct timespec ts;
  62   timer_t timer_sig, timer_thr1, timer_thr2;
  63   int retval;
  64   struct sigevent sigev1 =
  65   {
  66     .sigev_notify = SIGEV_SIGNAL,
  67     .sigev_signo = ZSIGALRM
  68   };
  69   struct sigevent sigev2;
  70   struct itimerspec itimer1 = { { 0, 200000000 }, { 0, 200000000 } };
  71   struct itimerspec itimer2 = { { 0, 100000000 }, { 0, 500000000 } };
  72   struct itimerspec itimer3 = { { 0, 150000000 }, { 0, 300000000 } };
  73   struct itimerspec old;
  74
  75   retval = clock_gettime (CLOCK_REALTIME, &ts);
  76
  77   sigev2.sigev_notify = SIGEV_THREAD;
  78   sigev2.sigev_notify_function = notify_func;
  79   sigev2.sigev_notify_attributes = NULL;
  80
  81   setvbuf (stdout, 0, _IOLBF, 0);
  82
  83   printf ("clock_gettime returned %d, timespec = { %ld, %ld }\n",
  84           retval, ts.tv_sec, ts.tv_nsec);
  85
  86   retval = clock_getres (CLOCK_REALTIME, &ts);
  87
  88   printf ("clock_getres returned %d, timespec = { %ld, %ld }\n",
  89           retval, ts.tv_sec, ts.tv_nsec);
  90
  91   timer_create (CLOCK_REALTIME, &sigev1, &timer_sig);
  92   timer_create (CLOCK_REALTIME, &sigev2, &timer_thr1);
  93   timer_create (CLOCK_REALTIME, &sigev2, &timer_thr2);
  94
  95   timer_settime (timer_thr1, 0, &itimer2, &old);
  96   timer_settime (timer_thr2, 0, &itimer3, &old);
  97
  98   signal (ZSIGALRM, signal_func);
  99
 100   timer_settime (timer_sig, 0, &itimer1, &old);
 101
 102   timer_delete (-1);
 103
 104   intr_sleep (3);
 105
 106   timer_delete (timer_sig);
 107   timer_delete (timer_thr1);
 108
 109   intr_sleep (3);
 110
 111   timer_delete (timer_thr2);
 112
 113   return 0;
 114 }