sem_d.c revision 59612 
1/****************************************************************************
2 *
3 * Copyright (C) 2000 Jason Evans <jasone@freebsd.org>.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice(s), this list of conditions and the following disclaimer as
11 *    the first lines of this file unmodified other than the possible
12 *    addition of one or more copyright notices.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice(s), this list of conditions and the following disclaimer in
15 *    the documentation and/or other materials provided with the
16 *    distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
19 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
25 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
26 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
27 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
28 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 *
30 ****************************************************************************
31 *
32 * sem test.
33 *
34 * $FreeBSD: head/lib/libkse/test/sem_d.c 59612 2000-04-24 21:07:45Z jasone $
35 *
36 ****************************************************************************/
37
38#define _REENTRANT
39
40#include <assert.h>
41#include <stdio.h>
42#include <fcntl.h>
43#include <errno.h>
44#include <semaphore.h>
45#include <pthread.h>
46
47#define NTHREADS 10
48
49void *
50entry(void * a_arg)
51{
52	sem_t * sem = (sem_t *) a_arg;
53
54	sem_wait(sem);
55	fprintf(stderr, "Got semaphore\n");
56
57	return NULL;
58}
59
60int
61main()
62{
63	sem_t sem_a, sem_b;
64	pthread_t threads[NTHREADS];
65	unsigned i;
66	int val;
67
68	fprintf(stderr, "Test begin\n");
69
70#ifdef _LIBC_R_
71	assert(-1 == sem_init(&sem_b, 1, 0));
72	assert(EPERM == errno);
73#endif
74
75	assert(0 == sem_init(&sem_b, 0, 0));
76	assert(0 == sem_getvalue(&sem_b, &val));
77	assert(0 == val);
78
79	assert(0 == sem_post(&sem_b));
80	assert(0 == sem_getvalue(&sem_b, &val));
81	assert(1 == val);
82
83	assert(0 == sem_wait(&sem_b));
84	assert(-1 == sem_trywait(&sem_b));
85	assert(EAGAIN == errno);
86	assert(0 == sem_post(&sem_b));
87	assert(0 == sem_trywait(&sem_b));
88	assert(0 == sem_post(&sem_b));
89	assert(0 == sem_wait(&sem_b));
90	assert(0 == sem_post(&sem_b));
91
92#ifdef _LIBC_R_
93	assert(SEM_FAILED == sem_open("/foo", O_CREAT | O_EXCL, 0644, 0));
94	assert(ENOSYS == errno);
95
96	assert(-1 == sem_close(&sem_b));
97	assert(ENOSYS == errno);
98
99	assert(-1 == sem_unlink("/foo"));
100	assert(ENOSYS == errno);
101#endif
102
103	assert(0 == sem_destroy(&sem_b));
104
105	assert(0 == sem_init(&sem_a, 0, 0));
106
107	for (i = 0; i < NTHREADS; i++) {
108		pthread_create(&threads[i], NULL, entry, (void *) &sem_a);
109	}
110
111	for (i = 0; i < NTHREADS; i++) {
112		assert(0 == sem_post(&sem_a));
113	}
114
115	for (i = 0; i < NTHREADS; i++) {
116		pthread_join(threads[i], NULL);
117	}
118
119	for (i = 0; i < NTHREADS; i++) {
120		pthread_create(&threads[i], NULL, entry, (void *) &sem_a);
121	}
122
123	for (i = 0; i < NTHREADS; i++) {
124		assert(0 == sem_post(&sem_a));
125	}
126
127	for (i = 0; i < NTHREADS; i++) {
128		pthread_join(threads[i], NULL);
129	}
130
131	assert(0 == sem_destroy(&sem_a));
132
133	fprintf(stderr, "Test end\n");
134	return 0;
135}
136