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/****************************************************************************
*
* Copyright (C) 2000 Jason Evans <jasone@freebsd.org>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice(s), this list of conditions and the following disclaimer as
* the first lines of this file unmodified other than the possible
* addition of one or more copyright notices.
* 2. Redistributions in binary form must reproduce the above copyright
* notice(s), this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************
*
* sem test.
*
* $FreeBSD$
*
****************************************************************************/
#include <assert.h>
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <semaphore.h>
#include <pthread.h>
#define NTHREADS 10
void *
entry(void * a_arg)
{
sem_t * sem = (sem_t *) a_arg;
sem_wait(sem);
fprintf(stderr, "Got semaphore\n");
return NULL;
}
int
main()
{
sem_t sem_a, sem_b;
pthread_t threads[NTHREADS];
unsigned i;
int val;
fprintf(stderr, "Test begin\n");
#ifdef _LIBC_R_
assert(-1 == sem_init(&sem_b, 1, 0));
assert(EPERM == errno);
#endif
assert(0 == sem_init(&sem_b, 0, 0));
assert(0 == sem_getvalue(&sem_b, &val));
assert(0 == val);
assert(0 == sem_post(&sem_b));
assert(0 == sem_getvalue(&sem_b, &val));
assert(1 == val);
assert(0 == sem_wait(&sem_b));
assert(-1 == sem_trywait(&sem_b));
assert(EAGAIN == errno);
assert(0 == sem_post(&sem_b));
assert(0 == sem_trywait(&sem_b));
assert(0 == sem_post(&sem_b));
assert(0 == sem_wait(&sem_b));
assert(0 == sem_post(&sem_b));
#ifdef _LIBC_R_
assert(SEM_FAILED == sem_open("/foo", O_CREAT | O_EXCL, 0644, 0));
assert(ENOSYS == errno);
assert(-1 == sem_close(&sem_b));
assert(ENOSYS == errno);
assert(-1 == sem_unlink("/foo"));
assert(ENOSYS == errno);
#endif
assert(0 == sem_destroy(&sem_b));
assert(0 == sem_init(&sem_a, 0, 0));
for (i = 0; i < NTHREADS; i++) {
pthread_create(&threads[i], NULL, entry, (void *) &sem_a);
}
for (i = 0; i < NTHREADS; i++) {
assert(0 == sem_post(&sem_a));
}
for (i = 0; i < NTHREADS; i++) {
pthread_join(threads[i], NULL);
}
for (i = 0; i < NTHREADS; i++) {
pthread_create(&threads[i], NULL, entry, (void *) &sem_a);
}
for (i = 0; i < NTHREADS; i++) {
assert(0 == sem_post(&sem_a));
}
for (i = 0; i < NTHREADS; i++) {
pthread_join(threads[i], NULL);
}
assert(0 == sem_destroy(&sem_a));
fprintf(stderr, "Test end\n");
return 0;
}
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