pth_blockedsig.c revision e739ac0589b4fb43561f801c4faba8c1b89f8680 
1#include <stdlib.h>
2#include <string.h>
3#include <unistd.h>
4#include <errno.h>
5#include <stdio.h>
6#include <signal.h>
7#include <pthread.h>
8
9static void sig_usr1(int);
10
11static pthread_t main_thread;
12
13void *
14child_main(void *no_args)
15{
16//  int i;
17
18// Only do it once, to shorten test --njn
19//  for (i = 0; i < 5; ++i)
20//    {
21      sleep (1);
22      fprintf (stdout, "thread CHILD sending SIGUSR1 to thread MAIN\n");
23      if (pthread_kill (main_thread, SIGUSR1) != 0)
24        fprintf (stderr, "error doing pthread_kill\n");
25//    }
26
27  return no_args;
28}
29
30int
31main(void)
32{
33  struct sigaction sigact;
34  sigset_t newmask, oldmask;
35  pthread_t child;
36
37  memset(&newmask, 0, sizeof newmask);
38  sigemptyset (&newmask);
39  sigaddset (&newmask, SIGUSR1);
40
41  if (pthread_sigmask (SIG_BLOCK, &newmask, &oldmask) != 0)
42    fprintf (stderr, "SIG_BLOCK error");
43
44  memset (&sigact, 0, sizeof sigact);
45  sigact.sa_handler = sig_usr1;
46  if (sigaction(SIGUSR1, &sigact, NULL) != 0)
47    fprintf (stderr, "signal(SIGINT) error");
48
49  main_thread = pthread_self ();
50  if (pthread_create (&child, NULL, child_main, NULL) != 0)
51    fprintf (stderr, "error creating thread");
52
53  pthread_join (child, NULL);
54
55  exit(0);
56}
57
58static void
59sig_usr1 (int signo)
60{
61  fprintf (stderr, "SHOULD NOT BE HERE (SIGUSR1)!!!!\n");
62  return;
63}
64
65
66