1 /* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
2 *
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to
5 * deal in the Software without restriction, including without limitation the
6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
7 * sell copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
9 *
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
19 * IN THE SOFTWARE.
20 */
21
22 #include "uv.h"
23 #include "task.h"
24
25 #include <stdlib.h>
26 #include <string.h>
27
28 typedef struct {
29 uv_mutex_t mutex;
30 uv_sem_t sem;
31 int delay;
32 volatile int posted;
33 } worker_config;
34
35
worker(void * arg)36 static void worker(void* arg) {
37 worker_config* c = arg;
38
39 if (c->delay)
40 uv_sleep(c->delay);
41
42 uv_mutex_lock(&c->mutex);
43 ASSERT_OK(c->posted);
44 uv_sem_post(&c->sem);
45 c->posted = 1;
46 uv_mutex_unlock(&c->mutex);
47 }
48
49
TEST_IMPL(semaphore_1)50 TEST_IMPL(semaphore_1) {
51 uv_thread_t thread;
52 worker_config wc;
53
54 memset(&wc, 0, sizeof(wc));
55
56 ASSERT_OK(uv_sem_init(&wc.sem, 0));
57 ASSERT_OK(uv_mutex_init(&wc.mutex));
58 ASSERT_OK(uv_thread_create(&thread, worker, &wc));
59
60 uv_sleep(100);
61 uv_mutex_lock(&wc.mutex);
62 ASSERT_EQ(1, wc.posted);
63 uv_sem_wait(&wc.sem); /* should not block */
64 uv_mutex_unlock(&wc.mutex); /* ergo, it should be ok to unlock after wait */
65
66 ASSERT_OK(uv_thread_join(&thread));
67 uv_mutex_destroy(&wc.mutex);
68 uv_sem_destroy(&wc.sem);
69
70 return 0;
71 }
72
73
TEST_IMPL(semaphore_2)74 TEST_IMPL(semaphore_2) {
75 uv_thread_t thread;
76 worker_config wc;
77
78 memset(&wc, 0, sizeof(wc));
79 wc.delay = 100;
80
81 ASSERT_OK(uv_sem_init(&wc.sem, 0));
82 ASSERT_OK(uv_mutex_init(&wc.mutex));
83 ASSERT_OK(uv_thread_create(&thread, worker, &wc));
84
85 uv_sem_wait(&wc.sem);
86
87 ASSERT_OK(uv_thread_join(&thread));
88 uv_mutex_destroy(&wc.mutex);
89 uv_sem_destroy(&wc.sem);
90
91 return 0;
92 }
93
94
TEST_IMPL(semaphore_3)95 TEST_IMPL(semaphore_3) {
96 uv_sem_t sem;
97
98 ASSERT_OK(uv_sem_init(&sem, 3));
99 uv_sem_wait(&sem); /* should not block */
100 uv_sem_wait(&sem); /* should not block */
101 ASSERT_OK(uv_sem_trywait(&sem));
102 ASSERT_EQ(UV_EAGAIN, uv_sem_trywait(&sem));
103
104 uv_sem_post(&sem);
105 ASSERT_OK(uv_sem_trywait(&sem));
106 ASSERT_EQ(UV_EAGAIN, uv_sem_trywait(&sem));
107
108 uv_sem_destroy(&sem);
109
110 return 0;
111 }
112
