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 | |
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(c->posted == 0); |
44 | uv_sem_post(&c->sem); |
45 | c->posted = 1; |
46 | uv_mutex_unlock(&c->mutex); |
47 | } |
48 | |
49 | |
50 | TEST_IMPL(semaphore_1) { |
51 | uv_thread_t thread; |
52 | worker_config wc; |
53 | |
54 | memset(&wc, 0, sizeof(wc)); |
55 | |
56 | ASSERT(0 == uv_sem_init(&wc.sem, 0)); |
57 | ASSERT(0 == uv_mutex_init(&wc.mutex)); |
58 | ASSERT(0 == uv_thread_create(&thread, worker, &wc)); |
59 | |
60 | uv_sleep(100); |
61 | uv_mutex_lock(&wc.mutex); |
62 | ASSERT(wc.posted == 1); |
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(0 == uv_thread_join(&thread)); |
67 | uv_mutex_destroy(&wc.mutex); |
68 | uv_sem_destroy(&wc.sem); |
69 | |
70 | return 0; |
71 | } |
72 | |
73 | |
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(0 == uv_sem_init(&wc.sem, 0)); |
82 | ASSERT(0 == uv_mutex_init(&wc.mutex)); |
83 | ASSERT(0 == uv_thread_create(&thread, worker, &wc)); |
84 | |
85 | uv_sem_wait(&wc.sem); |
86 | |
87 | ASSERT(0 == uv_thread_join(&thread)); |
88 | uv_mutex_destroy(&wc.mutex); |
89 | uv_sem_destroy(&wc.sem); |
90 | |
91 | return 0; |
92 | } |
93 | |
94 | |
95 | TEST_IMPL(semaphore_3) { |
96 | uv_sem_t sem; |
97 | |
98 | ASSERT(0 == uv_sem_init(&sem, 3)); |
99 | uv_sem_wait(&sem); /* should not block */ |
100 | uv_sem_wait(&sem); /* should not block */ |
101 | ASSERT(0 == uv_sem_trywait(&sem)); |
102 | ASSERT(UV_EAGAIN == uv_sem_trywait(&sem)); |
103 | |
104 | uv_sem_post(&sem); |
105 | ASSERT(0 == uv_sem_trywait(&sem)); |
106 | ASSERT(UV_EAGAIN == uv_sem_trywait(&sem)); |
107 | |
108 | uv_sem_destroy(&sem); |
109 | |
110 | return 0; |
111 | } |
112 | |