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glibc/nptl/tst-cond6.c
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/* Copyright (C) 2002-2016 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 <stdio.h> | |
#include <stdlib.h> | |
#include <string.h> | |
#include <time.h> | |
#include <unistd.h> | |
#include <sys/mman.h> | |
#include <sys/time.h> | |
#include <sys/wait.h> | |
int *condition; | |
static int | |
do_test (void) | |
{ | |
size_t ps = sysconf (_SC_PAGESIZE); | |
char tmpfname[] = "/tmp/tst-cond6.XXXXXX"; | |
char data[ps]; | |
void *mem; | |
int fd; | |
pthread_mutexattr_t ma; | |
pthread_mutex_t *mut1; | |
pthread_mutex_t *mut2; | |
pthread_condattr_t ca; | |
pthread_cond_t *cond; | |
pid_t pid; | |
int result = 0; | |
fd = mkstemp (tmpfname); | |
if (fd == -1) | |
{ | |
printf ("cannot open temporary file: %m\n"); | |
exit (1); | |
} | |
/* Make sure it is always removed. */ | |
unlink (tmpfname); | |
/* Create one page of data. */ | |
memset (data, '\0', ps); | |
/* Write the data to the file. */ | |
if (write (fd, data, ps) != (ssize_t) ps) | |
{ | |
puts ("short write"); | |
exit (1); | |
} | |
mem = mmap (NULL, ps, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); | |
if (mem == MAP_FAILED) | |
{ | |
printf ("mmap failed: %m\n"); | |
exit (1); | |
} | |
mut1 = (pthread_mutex_t *) (((uintptr_t) mem | |
+ __alignof (pthread_mutex_t)) | |
& ~(__alignof (pthread_mutex_t) - 1)); | |
mut2 = mut1 + 1; | |
cond = (pthread_cond_t *) (((uintptr_t) (mut2 + 1) | |
+ __alignof (pthread_cond_t)) | |
& ~(__alignof (pthread_cond_t) - 1)); | |
condition = (int *) (((uintptr_t) (cond + 1) + __alignof (int)) | |
& ~(__alignof (int) - 1)); | |
if (pthread_mutexattr_init (&ma) != 0) | |
{ | |
puts ("mutexattr_init failed"); | |
exit (1); | |
} | |
if (pthread_mutexattr_setpshared (&ma, PTHREAD_PROCESS_SHARED) != 0) | |
{ | |
puts ("mutexattr_setpshared failed"); | |
exit (1); | |
} | |
if (pthread_mutex_init (mut1, &ma) != 0) | |
{ | |
puts ("1st mutex_init failed"); | |
exit (1); | |
} | |
if (pthread_mutex_init (mut2, &ma) != 0) | |
{ | |
puts ("2nd mutex_init failed"); | |
exit (1); | |
} | |
if (pthread_condattr_init (&ca) != 0) | |
{ | |
puts ("condattr_init failed"); | |
exit (1); | |
} | |
if (pthread_condattr_setpshared (&ca, PTHREAD_PROCESS_SHARED) != 0) | |
{ | |
puts ("condattr_setpshared failed"); | |
exit (1); | |
} | |
if (pthread_cond_init (cond, &ca) != 0) | |
{ | |
puts ("cond_init failed"); | |
exit (1); | |
} | |
if (pthread_mutex_lock (mut1) != 0) | |
{ | |
puts ("parent: 1st mutex_lock failed"); | |
exit (1); | |
} | |
puts ("going to fork now"); | |
pid = fork (); | |
if (pid == -1) | |
{ | |
puts ("fork failed"); | |
exit (1); | |
} | |
else if (pid == 0) | |
{ | |
struct timespec ts; | |
struct timeval tv; | |
if (pthread_mutex_lock (mut2) != 0) | |
{ | |
puts ("child: mutex_lock failed"); | |
exit (1); | |
} | |
if (pthread_mutex_unlock (mut1) != 0) | |
{ | |
puts ("child: 1st mutex_unlock failed"); | |
exit (1); | |
} | |
if (gettimeofday (&tv, NULL) != 0) | |
{ | |
puts ("gettimeofday failed"); | |
exit (1); | |
} | |
TIMEVAL_TO_TIMESPEC (&tv, &ts); | |
ts.tv_nsec += 500000000; | |
if (ts.tv_nsec >= 1000000000) | |
{ | |
ts.tv_nsec -= 1000000000; | |
++ts.tv_sec; | |
} | |
do | |
if (pthread_cond_timedwait (cond, mut2, &ts) != 0) | |
{ | |
puts ("child: cond_wait failed"); | |
exit (1); | |
} | |
while (*condition == 0); | |
if (pthread_mutex_unlock (mut2) != 0) | |
{ | |
puts ("child: 2nd mutex_unlock failed"); | |
exit (1); | |
} | |
puts ("child done"); | |
} | |
else | |
{ | |
int status; | |
if (pthread_mutex_lock (mut1) != 0) | |
{ | |
puts ("parent: 2nd mutex_lock failed"); | |
exit (1); | |
} | |
if (pthread_mutex_lock (mut2) != 0) | |
{ | |
puts ("parent: 3rd mutex_lock failed"); | |
exit (1); | |
} | |
if (pthread_cond_signal (cond) != 0) | |
{ | |
puts ("parent: cond_signal failed"); | |
exit (1); | |
} | |
*condition = 1; | |
if (pthread_mutex_unlock (mut2) != 0) | |
{ | |
puts ("parent: mutex_unlock failed"); | |
exit (1); | |
} | |
puts ("waiting for child"); | |
waitpid (pid, &status, 0); | |
result |= status; | |
puts ("parent done"); | |
} | |
return result; | |
} | |
#define TEST_FUNCTION do_test () | |
#include "../test-skeleton.c" |