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[glibc/history.git] / nptl / eintr.c
blob933c5d81b3a7680a8fac7f443f976a118b1991af
1 /* Copyright (C) 2003 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18 02111-1307 USA. */
20 #include <pthread.h>
21 #include <signal.h>
22 #include <unistd.h>
25 static int the_sig;
28 static void
29 eintr_handler (int sig)
31 if (sig != the_sig)
33 write (STDOUT_FILENO, "eintr_handler: signal number wrong\n", 35);
34 _exit (1);
36 write (STDOUT_FILENO, ".", 1);
40 static void *
41 eintr_source (void *arg)
43 struct timespec ts = { .tv_sec = 0, .tv_nsec = 500000 };
45 if (arg == NULL)
47 sigset_t ss;
48 sigemptyset (&ss);
49 sigaddset (&ss, the_sig);
50 pthread_sigmask (SIG_BLOCK, &ss, NULL);
53 while (1)
55 if (arg != NULL)
56 pthread_kill (*(pthread_t *) arg, the_sig);
57 else
58 kill (getpid (), the_sig);
60 nanosleep (&ts, NULL);
63 /* NOTREACHED */
64 return NULL;
68 static void
69 setup_eintr (int sig, pthread_t *thp)
71 struct sigaction sa;
72 sigemptyset (&sa.sa_mask);
73 sa.sa_flags = 0;
74 sa.sa_handler = eintr_handler;
75 if (sigaction (sig, &sa, NULL) != 0)
77 puts ("setup_eintr: sigaction failed");
78 exit (1);
80 the_sig = sig;
82 /* Create the thread which will fire off the signals. */
83 pthread_t th;
84 if (pthread_create (&th, NULL, eintr_source, thp) != 0)
86 puts ("setup_eintr: pthread_create failed");
87 exit (1);