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/* Copyright (C) 2002-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <pthread.h>
#include <semaphore.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
/* Number of different signalss to use. Also is the number of
threads. */
#define N 10
/* Maximum number of threads in flight at any one time. */
#define INFLIGHT 5
/* Number of signals sent in total. */
#define ROUNDS 10000
static int received[N][N];
static int nsig[N];
static pthread_t th[N];
static sem_t sem;
static pthread_mutex_t lock[N];
static pthread_t th_main;
static int sig0;
static void
handler (int sig)
{
int i;
for (i = 0; i < N; ++i)
if (pthread_equal (pthread_self (), th[i]))
break;
if (i == N)
{
if (pthread_equal (pthread_self (), th_main))
puts ("signal received by main thread");
else
printf ("signal received by unknown thread (%lx)\n",
(unsigned long int) pthread_self ());
exit (1);
}
++received[i][sig - sig0];
sem_post (&sem);
}
static void *
tf (void *arg)
{
int idx = (long int) arg;
sigset_t ss;
sigemptyset (&ss);
int i;
for (i = 0; i <= idx; ++i)
sigaddset (&ss, sig0 + i);
if (pthread_sigmask (SIG_UNBLOCK, &ss, NULL) != 0)
{
printf ("thread %d: pthread_sigmask failed\n", i);
exit (1);
}
pthread_mutex_lock (&lock[idx]);
return NULL;
}
static int
do_test (void)
{
/* Block all signals. */
sigset_t ss;
sigfillset (&ss);
th_main = pthread_self ();
sig0 = SIGRTMIN;
if (pthread_sigmask (SIG_SETMASK, &ss, NULL) != 0)
{
puts ("1st pthread_sigmask failed");
exit (1);
}
/* Install the handler. */
int i;
for (i = 0; i < N; ++i)
{
struct sigaction sa =
{
.sa_handler = handler,
.sa_flags = 0
};
sigfillset (&sa.sa_mask);
if (sigaction (sig0 + i, &sa, NULL) != 0)
{
printf ("sigaction for signal %d failed\n", i);
exit (1);
}
}
if (sem_init (&sem, 0, INFLIGHT) != 0)
{
puts ("sem_init failed");
exit (1);
}
pthread_attr_t a;
if (pthread_attr_init (&a) != 0)
{
puts ("attr_init failed");
exit (1);
}
if (pthread_attr_setstacksize (&a, 1 * 1024 * 1024) != 0)
{
puts ("attr_setstacksize failed");
return 1;
}
for (i = 0; i < N; ++i)
{
if (pthread_mutex_init (&lock[i], NULL) != 0)
{
printf ("mutex_init[%d] failed\n", i);
}
if (pthread_mutex_lock (&lock[i]) != 0)
{
printf ("mutex_lock[%d] failed\n", i);
}
if (pthread_create (&th[i], &a, tf, (void *) (long int) i) != 0)
{
printf ("create of thread %d failed\n", i);
exit (1);
}
}
if (pthread_attr_destroy (&a) != 0)
{
puts ("attr_destroy failed");
exit (1);
}
int result = 0;
unsigned int r = 42;
pid_t pid = getpid ();
for (i = 0; i < ROUNDS; ++i)
{
if (TEMP_FAILURE_RETRY (sem_wait (&sem)) != 0)
{
printf ("sem_wait round %d failed: %m\n", i);
exit (1);
}
int s = rand_r (&r) % N;
kill (pid, sig0 + s);
}
void *status;
for (i = 0; i < N; ++i)
{
if (pthread_mutex_unlock (&lock[i]) != 0)
{
printf ("unlock %d failed\n", i);
exit (1);
}
if (pthread_join (th[i], &status) != 0)
{
printf ("join %d failed\n", i);
result = 1;
}
else if (status != NULL)
{
printf ("%d: result != NULL\n", i);
result = 1;
}
}
int total = 0;
for (i = 0; i < N; ++i)
{
int j;
for (j = 0; j <= i; ++j)
total += received[i][j];
for (j = i + 1; j < N; ++j)
if (received[i][j] != 0)
{
printf ("thread %d received signal SIGRTMIN+%d\n", i, j);
result = 1;
}
}
if (total != ROUNDS)
{
printf ("total number of handled signals is %d, expected %d\n",
total, ROUNDS);
result = 1;
}
printf ("A total of %d signals sent and received\n", total);
for (i = 0; i < N; ++i)
{
printf ("thread %2d:", i);
int j;
for (j = 0; j <= i; ++j)
{
printf (" %5d", received[i][j]);
nsig[j] += received[i][j];
}
putchar ('\n');
}
printf ("\nTotal :");
for (i = 0; i < N; ++i)
printf (" %5d", nsig[i]);
putchar ('\n');
return result;
}
#define TIMEOUT 10
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
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