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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 void
     36 handle(sigval_t v)
     37 {
     38     time_t  t;
     39     char    p[32];
     40 
     41     time(&t);
     42     strftime(p, sizeof(p), "%T", localtime(&t));
     43     printf("%s thread %d, val = %d, signal captured.\n",
     44             p,  (int)pthread_self(), v.sival_int);
     45     return;
     46 }
     47 
     48 int
     49 create(int seconds, int id)
     50 {
     51     timer_t tid;
     52     struct sigevent se;
     53     struct itimerspec ts, ots;
     54 
     55     memset(&se, 0, sizeof (se));
     56     se.sigev_notify = SIGEV_THREAD;
     57     se.sigev_notify_function = handle;
     58     se.sigev_value.sival_int = id;
     59 
     60     if (timer_create (CLOCK_REALTIME, &se, &tid) < 0)
     61     {
     62         perror ("timer_creat");
     63         return -1;
     64     }
     65     puts ("timer_create successfully.");
     66     ts.it_value.tv_sec = 3;
     67     ts.it_value.tv_nsec = 0;
     68     ts.it_interval.tv_sec = seconds;
     69     ts.it_interval.tv_nsec = 0;
     70     if (timer_settime (tid, TIMER_ABSTIME, &ts, &ots) < 0)
     71     {
     72         perror ("timer_settime");
     73         return -1;
     74     }
     75     return 0;
     76 }
     77 
     78 int
     79 main (void)
     80 {
     81     if (create (3, 1) < 0) return 1;
     82     if (create (5, 2) < 0) return 1;
     83     for (;;)
     84     {
     85         sleep (10);
     86     }
     87     return 0;
     88 }
     89