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glibc/nptl/tst-cond12.c
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/* Copyright (C) 2003-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Ulrich Drepper <drepper@redhat.com>, 2003. | |
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 <signal.h> | |
#include <stdio.h> | |
#include <stdlib.h> | |
#include <unistd.h> | |
#include <sys/mman.h> | |
#include <sys/wait.h> | |
static char fname[] = "/tmp/tst-cond12-XXXXXX"; | |
static int fd; | |
static void prepare (void); | |
#define PREPARE(argc, argv) prepare () | |
static int do_test (void); | |
#define TEST_FUNCTION do_test () | |
#include "../test-skeleton.c" | |
static void | |
prepare (void) | |
{ | |
fd = mkstemp (fname); | |
if (fd == -1) | |
{ | |
printf ("mkstemp failed: %m\n"); | |
exit (1); | |
} | |
add_temp_file (fname); | |
if (ftruncate (fd, 1000) < 0) | |
{ | |
printf ("ftruncate failed: %m\n"); | |
exit (1); | |
} | |
} | |
static int | |
do_test (void) | |
{ | |
struct | |
{ | |
pthread_mutex_t m; | |
pthread_cond_t c; | |
int var; | |
} *p = mmap (NULL, sizeof (*p), PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); | |
if (p == MAP_FAILED) | |
{ | |
printf ("initial mmap failed: %m\n"); | |
return 1; | |
} | |
pthread_mutexattr_t ma; | |
if (pthread_mutexattr_init (&ma) != 0) | |
{ | |
puts ("mutexattr_init failed"); | |
return 1; | |
} | |
if (pthread_mutexattr_setpshared (&ma, 1) != 0) | |
{ | |
puts ("mutexattr_setpshared failed"); | |
return 1; | |
} | |
if (pthread_mutex_init (&p->m, &ma) != 0) | |
{ | |
puts ("mutex_init failed"); | |
return 1; | |
} | |
if (pthread_mutexattr_destroy (&ma) != 0) | |
{ | |
puts ("mutexattr_destroy failed"); | |
return 1; | |
} | |
pthread_condattr_t ca; | |
if (pthread_condattr_init (&ca) != 0) | |
{ | |
puts ("condattr_init failed"); | |
return 1; | |
} | |
if (pthread_condattr_setpshared (&ca, 1) != 0) | |
{ | |
puts ("condattr_setpshared failed"); | |
return 1; | |
} | |
if (pthread_cond_init (&p->c, &ca) != 0) | |
{ | |
puts ("mutex_init failed"); | |
return 1; | |
} | |
if (pthread_condattr_destroy (&ca) != 0) | |
{ | |
puts ("condattr_destroy failed"); | |
return 1; | |
} | |
if (pthread_mutex_lock (&p->m) != 0) | |
{ | |
puts ("initial mutex_lock failed"); | |
return 1; | |
} | |
p->var = 42; | |
pid_t pid = fork (); | |
if (pid == -1) | |
{ | |
printf ("fork failed: %m\n"); | |
return 1; | |
} | |
if (pid == 0) | |
{ | |
void *oldp = p; | |
p = mmap (NULL, sizeof (*p), PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); | |
if (p == oldp) | |
{ | |
puts ("child: mapped to same address"); | |
kill (getppid (), SIGKILL); | |
exit (1); | |
} | |
munmap (oldp, sizeof (*p)); | |
if (pthread_mutex_lock (&p->m) != 0) | |
{ | |
puts ("child: mutex_lock failed"); | |
kill (getppid (), SIGKILL); | |
exit (1); | |
} | |
p->var = 0; | |
#ifndef USE_COND_SIGNAL | |
if (pthread_cond_broadcast (&p->c) != 0) | |
{ | |
puts ("child: cond_broadcast failed"); | |
kill (getppid (), SIGKILL); | |
exit (1); | |
} | |
#else | |
if (pthread_cond_signal (&p->c) != 0) | |
{ | |
puts ("child: cond_signal failed"); | |
kill (getppid (), SIGKILL); | |
exit (1); | |
} | |
#endif | |
if (pthread_mutex_unlock (&p->m) != 0) | |
{ | |
puts ("child: mutex_unlock failed"); | |
kill (getppid (), SIGKILL); | |
exit (1); | |
} | |
exit (0); | |
} | |
do | |
pthread_cond_wait (&p->c, &p->m); | |
while (p->var != 0); | |
if (TEMP_FAILURE_RETRY (waitpid (pid, NULL, 0)) != pid) | |
{ | |
printf ("waitpid failed: %m\n"); | |
kill (pid, SIGKILL); | |
return 1; | |
} | |
return 0; | |
} |