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glibc/rt/tst-mqueue3.c
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/* Test SIGEV_THREAD handling for POSIX message queues. | |
Copyright (C) 2004-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Ulrich Drepper <drepper@redhat.com>, 2004. | |
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 <mqueue.h> | |
#include <signal.h> | |
#include <stddef.h> | |
#include <stdint.h> | |
#include <stdio.h> | |
#include <stdlib.h> | |
#include <string.h> | |
#include <sys/mman.h> | |
#include <sys/wait.h> | |
#include <unistd.h> | |
#if _POSIX_THREADS | |
# include <pthread.h> | |
static pid_t pid; | |
static mqd_t m; | |
static const char message[] = "hello"; | |
# define MAXMSG 10 | |
# define MSGSIZE 10 | |
# define UNIQUE 42 | |
static void | |
fct (union sigval s) | |
{ | |
/* Put the mq in non-blocking mode. */ | |
struct mq_attr attr; | |
if (mq_getattr (m, &attr) != 0) | |
{ | |
printf ("%s: mq_getattr failed: %m\n", __FUNCTION__); | |
exit (1); | |
} | |
attr.mq_flags |= O_NONBLOCK; | |
if (mq_setattr (m, &attr, NULL) != 0) | |
{ | |
printf ("%s: mq_setattr failed: %m\n", __FUNCTION__); | |
exit (1); | |
} | |
/* Check the values. */ | |
if (attr.mq_maxmsg != MAXMSG) | |
{ | |
printf ("%s: mq_maxmsg wrong: is %jd, expecte %d\n", | |
__FUNCTION__, (intmax_t) attr.mq_maxmsg, MAXMSG); | |
exit (1); | |
} | |
if (attr.mq_msgsize != MAXMSG) | |
{ | |
printf ("%s: mq_msgsize wrong: is %jd, expecte %d\n", | |
__FUNCTION__, (intmax_t) attr.mq_msgsize, MSGSIZE); | |
exit (1); | |
} | |
/* Read the message. */ | |
char buf[attr.mq_msgsize]; | |
ssize_t n = TEMP_FAILURE_RETRY (mq_receive (m, buf, attr.mq_msgsize, NULL)); | |
if (n != sizeof (message)) | |
{ | |
printf ("%s: length of message wrong: is %zd, expected %zu\n", | |
__FUNCTION__, n, sizeof (message)); | |
exit (1); | |
} | |
if (memcmp (buf, message, sizeof (message)) != 0) | |
{ | |
printf ("%s: message wrong: is \"%s\", expected \"%s\"\n", | |
__FUNCTION__, buf, message); | |
exit (1); | |
} | |
exit (UNIQUE); | |
} | |
int | |
do_test (void) | |
{ | |
char tmpfname[] = "/tmp/tst-mqueue3-barrier.XXXXXX"; | |
int fd = mkstemp (tmpfname); | |
if (fd == -1) | |
{ | |
printf ("cannot open temporary file: %m\n"); | |
return 1; | |
} | |
/* Make sure it is always removed. */ | |
unlink (tmpfname); | |
/* Create one page of data. */ | |
size_t ps = sysconf (_SC_PAGESIZE); | |
char data[ps]; | |
memset (data, '\0', ps); | |
/* Write the data to the file. */ | |
if (write (fd, data, ps) != (ssize_t) ps) | |
{ | |
puts ("short write"); | |
return 1; | |
} | |
void *mem = mmap (NULL, ps, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); | |
if (mem == MAP_FAILED) | |
{ | |
printf ("mmap failed: %m\n"); | |
return 1; | |
} | |
pthread_barrier_t *b; | |
b = (pthread_barrier_t *) (((uintptr_t) mem + __alignof (pthread_barrier_t)) | |
& ~(__alignof (pthread_barrier_t) - 1)); | |
pthread_barrierattr_t a; | |
if (pthread_barrierattr_init (&a) != 0) | |
{ | |
puts ("barrierattr_init failed"); | |
return 1; | |
} | |
if (pthread_barrierattr_setpshared (&a, PTHREAD_PROCESS_SHARED) != 0) | |
{ | |
puts ("barrierattr_setpshared failed, could not test"); | |
return 0; | |
} | |
if (pthread_barrier_init (b, &a, 2) != 0) | |
{ | |
puts ("barrier_init failed"); | |
return 1; | |
} | |
if (pthread_barrierattr_destroy (&a) != 0) | |
{ | |
puts ("barrierattr_destroy failed"); | |
return 1; | |
} | |
/* Name for the message queue. */ | |
char mqname[sizeof ("/tst-mqueue3-") + 3 * sizeof (pid_t)]; | |
snprintf (mqname, sizeof (mqname) - 1, "/tst-mqueue3-%ld", | |
(long int) getpid ()); | |
/* Create the message queue. */ | |
struct mq_attr attr = { .mq_maxmsg = MAXMSG, .mq_msgsize = MSGSIZE }; | |
m = mq_open (mqname, O_CREAT | O_EXCL | O_RDWR, 0600, &attr); | |
if (m == -1) | |
{ | |
if (errno == ENOSYS) | |
{ | |
puts ("not implemented"); | |
return 0; | |
} | |
puts ("mq_open failed"); | |
return 1; | |
} | |
/* Unlink the message queue right away. */ | |
if (mq_unlink (mqname) != 0) | |
{ | |
puts ("mq_unlink failed"); | |
return 1; | |
} | |
pid = fork (); | |
if (pid == -1) | |
{ | |
puts ("fork failed"); | |
return 1; | |
} | |
if (pid == 0) | |
{ | |
/* Request notification via thread. */ | |
struct sigevent ev; | |
ev.sigev_notify = SIGEV_THREAD; | |
ev.sigev_notify_function = fct; | |
ev.sigev_value.sival_ptr = NULL; | |
ev.sigev_notify_attributes = NULL; | |
/* Tell the kernel. */ | |
if (mq_notify (m,&ev) != 0) | |
{ | |
puts ("mq_notify failed"); | |
exit (1); | |
} | |
/* Tell the parent we are ready. */ | |
(void) pthread_barrier_wait (b); | |
/* Make sure the process goes away eventually. */ | |
alarm (10); | |
/* Do nothing forever. */ | |
while (1) | |
pause (); | |
} | |
/* Wait for the child process to register to notification method. */ | |
(void) pthread_barrier_wait (b); | |
/* Send the message. */ | |
if (mq_send (m, message, sizeof (message), 1) != 0) | |
{ | |
kill (pid, SIGKILL); | |
puts ("mq_send failed"); | |
return 1; | |
} | |
int r; | |
if (TEMP_FAILURE_RETRY (waitpid (pid, &r, 0)) != pid) | |
{ | |
kill (pid, SIGKILL); | |
puts ("waitpid failed"); | |
return 1; | |
} | |
return WIFEXITED (r) && WEXITSTATUS (r) == UNIQUE ? 0 : 1; | |
} | |
# define TEST_FUNCTION do_test () | |
#else | |
# define TEST_FUNCTION 0 | |
#endif | |
#include "../test-skeleton.c" |