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      1 /*
      2  * Copyright (C) 2008 The Android Open Source Project
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  *  * Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  *  * Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in
     12  *    the documentation and/or other materials provided with the
     13  *    distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     16  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     17  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
     18  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
     19  * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
     22  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
     25  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 #include <stdio.h>
     29 #include <time.h>
     30 #include <signal.h>
     31 #include <pthread.h>
     32 #include <string.h>
     33 #include <unistd.h>
     34 
     35 static timer_t   tid;
     36 static int       count;
     37 
     38 /* this test program is there to check that disarming a timer
     39  * can be done by calling timer_settime() with an it_interval
     40  * value of 0
     41  */
     42 void
     43 handle(sigval_t v)
     44 {
     45     time_t  t;
     46     char    p[32];
     47     struct itimerspec  ts;
     48 
     49     time(&t);
     50     strftime(p, sizeof(p), "%T", localtime(&t));
     51     printf("%s thread %d, val = %d, signal captured.\n",
     52             p,  (int)pthread_self(), v.sival_int);
     53     count += 1;
     54 
     55     /* this should disable the timer, and hence make 'count' no more than 1 */
     56     ts.it_value.tv_sec = 0;
     57     ts.it_value.tv_nsec = 0;
     58     ts.it_interval.tv_sec  = 1;
     59     ts.it_interval.tv_nsec = 0;
     60     timer_settime(tid, TIMER_ABSTIME, &ts, NULL);
     61 
     62     return;
     63 }
     64 
     65 int
     66 create(int seconds, int id)
     67 {
     68     struct sigevent se;
     69     struct itimerspec ts, ots;
     70 
     71     memset(&se, 0, sizeof (se));
     72     se.sigev_notify = SIGEV_THREAD;
     73     se.sigev_notify_function = handle;
     74     se.sigev_value.sival_int = id;
     75 
     76     if (timer_create (CLOCK_REALTIME, &se, &tid) < 0)
     77     {
     78         perror ("timer_creat");
     79         return -1;
     80     }
     81     puts ("timer_create successfully.");
     82     ts.it_value.tv_sec =  0;
     83     ts.it_value.tv_nsec = 1;
     84     ts.it_interval.tv_sec = seconds;
     85     ts.it_interval.tv_nsec = 0;
     86     if (timer_settime (tid, TIMER_ABSTIME, &ts, &ots) < 0)
     87     {
     88         perror ("timer_settime");
     89         return -1;
     90     }
     91     return 0;
     92 }
     93 
     94 int
     95 main (void)
     96 {
     97     if (create (1, 1) < 0) return 1;
     98     sleep (4);
     99 
    100     if (count == 1) {
    101         printf("OK\n");
    102         return 0;
    103     } else {
    104         printf("KO (count=%d)\n", count);
    105         return 1;
    106     }
    107 }
    108