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 <string.h>
26 #include <errno.h>
27
28 typedef struct {
29 uv_barrier_t barrier;
30 int delay;
31 volatile int posted;
32 int main_barrier_wait_rval;
33 int worker_barrier_wait_rval;
34 } worker_config;
35
36
worker(void * arg)37 static void worker(void* arg) {
38 worker_config* c = arg;
39
40 if (c->delay)
41 uv_sleep(c->delay);
42
43 c->worker_barrier_wait_rval = uv_barrier_wait(&c->barrier);
44 }
45
46
TEST_IMPL(barrier_1)47 TEST_IMPL(barrier_1) {
48 uv_thread_t thread;
49 worker_config wc;
50
51 memset(&wc, 0, sizeof(wc));
52
53 ASSERT(0 == uv_barrier_init(&wc.barrier, 2));
54 ASSERT(0 == uv_thread_create(&thread, worker, &wc));
55
56 uv_sleep(100);
57 wc.main_barrier_wait_rval = uv_barrier_wait(&wc.barrier);
58
59 ASSERT(0 == uv_thread_join(&thread));
60 uv_barrier_destroy(&wc.barrier);
61
62 ASSERT(1 == (wc.main_barrier_wait_rval ^ wc.worker_barrier_wait_rval));
63
64 return 0;
65 }
66
67
TEST_IMPL(barrier_2)68 TEST_IMPL(barrier_2) {
69 uv_thread_t thread;
70 worker_config wc;
71
72 memset(&wc, 0, sizeof(wc));
73 wc.delay = 100;
74
75 ASSERT(0 == uv_barrier_init(&wc.barrier, 2));
76 ASSERT(0 == uv_thread_create(&thread, worker, &wc));
77
78 wc.main_barrier_wait_rval = uv_barrier_wait(&wc.barrier);
79
80 ASSERT(0 == uv_thread_join(&thread));
81 uv_barrier_destroy(&wc.barrier);
82
83 ASSERT(1 == (wc.main_barrier_wait_rval ^ wc.worker_barrier_wait_rval));
84
85 return 0;
86 }
87
88
TEST_IMPL(barrier_3)89 TEST_IMPL(barrier_3) {
90 uv_thread_t thread;
91 worker_config wc;
92
93 memset(&wc, 0, sizeof(wc));
94
95 ASSERT(0 == uv_barrier_init(&wc.barrier, 2));
96 ASSERT(0 == uv_thread_create(&thread, worker, &wc));
97
98 wc.main_barrier_wait_rval = uv_barrier_wait(&wc.barrier);
99
100 ASSERT(0 == uv_thread_join(&thread));
101 uv_barrier_destroy(&wc.barrier);
102
103 ASSERT(1 == (wc.main_barrier_wait_rval ^ wc.worker_barrier_wait_rval));
104
105 return 0;
106 }
107
serial_worker(void * data)108 static void serial_worker(void* data) {
109 uv_barrier_t* barrier;
110
111 barrier = data;
112 if (uv_barrier_wait(barrier) > 0)
113 uv_barrier_destroy(barrier);
114
115 uv_sleep(100); /* Wait a bit before terminating. */
116 }
117
118 /* Ensure that uv_barrier_wait returns positive only after all threads have
119 * exited the barrier. If this value is returned too early and the barrier is
120 * destroyed prematurely, then this test may see a crash. */
TEST_IMPL(barrier_serial_thread)121 TEST_IMPL(barrier_serial_thread) {
122 uv_thread_t threads[4];
123 uv_barrier_t barrier;
124 unsigned i;
125
126 ASSERT(0 == uv_barrier_init(&barrier, ARRAY_SIZE(threads) + 1));
127
128 for (i = 0; i < ARRAY_SIZE(threads); ++i)
129 ASSERT(0 == uv_thread_create(&threads[i], serial_worker, &barrier));
130
131 if (uv_barrier_wait(&barrier) > 0)
132 uv_barrier_destroy(&barrier);
133
134 for (i = 0; i < ARRAY_SIZE(threads); ++i)
135 ASSERT(0 == uv_thread_join(&threads[i]));
136
137 return 0;
138 }
139
140 /* Single thread uv_barrier_wait should return correct return value. */
TEST_IMPL(barrier_serial_thread_single)141 TEST_IMPL(barrier_serial_thread_single) {
142 uv_barrier_t barrier;
143
144 ASSERT(0 == uv_barrier_init(&barrier, 1));
145 ASSERT(0 < uv_barrier_wait(&barrier));
146 uv_barrier_destroy(&barrier);
147 return 0;
148 }
149