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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(int 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 %p, val = %d, signal captured.\n",
     44             p,  pthread_self(), v);
     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_SIGNAL;
     57     se.sigev_signo  = SIGUSR1;
     58 
     59     if (timer_create (CLOCK_REALTIME, &se, &tid) < 0)
     60     {
     61         perror ("timer_creat");
     62         return -1;
     63     }
     64     printf("timer_create successfully = %d.\n", (int)tid);
     65     ts.it_value.tv_sec = 3;
     66     ts.it_value.tv_nsec = 0;
     67     ts.it_interval.tv_sec = seconds;
     68     ts.it_interval.tv_nsec = 0;
     69     if (timer_settime (tid, TIMER_ABSTIME, &ts, &ots) < 0)
     70     {
     71         perror ("timer_settime");
     72         return -1;
     73     }
     74     return 0;
     75 }
     76 
     77 int
     78 main (void)
     79 {
     80     sigset_t          mask[1];
     81     struct sigaction  act[1];
     82 
     83     sigemptyset(mask);
     84     sigaddset(mask, SIGUSR1);
     85     sigprocmask(SIG_UNBLOCK,mask,NULL);
     86 
     87     memset(act, 0, sizeof(*act));
     88     act->sa_handler = handle;
     89     sigaction( SIGUSR1, act, NULL );
     90 
     91     printf("main thread is %p\n", pthread_self());
     92 
     93     if (create (3, 1) < 0) return 1;
     94     if (create (5, 2) < 0) return 1;
     95     for (;;)
     96     {
     97         sleep (10);
     98     }
     99     return 0;
    100 }
    101