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 unsigned delay;
31 unsigned niter;
32 unsigned main_barrier_wait_rval;
33 unsigned worker_barrier_wait_rval;
34 } worker_config;
35
36
worker(void * arg)37 static void worker(void* arg) {
38 worker_config* c = arg;
39 unsigned i;
40
41 if (c->delay)
42 uv_sleep(c->delay);
43
44 for (i = 0; i < c->niter; i++)
45 c->worker_barrier_wait_rval += uv_barrier_wait(&c->barrier);
46 }
47
48
TEST_IMPL(barrier_1)49 TEST_IMPL(barrier_1) {
50 uv_thread_t thread;
51 worker_config wc;
52
53 memset(&wc, 0, sizeof(wc));
54 wc.niter = 1;
55
56 ASSERT_OK(uv_barrier_init(&wc.barrier, 2));
57 ASSERT_OK(uv_thread_create(&thread, worker, &wc));
58
59 uv_sleep(100);
60 wc.main_barrier_wait_rval = uv_barrier_wait(&wc.barrier);
61
62 ASSERT_OK(uv_thread_join(&thread));
63 uv_barrier_destroy(&wc.barrier);
64
65 ASSERT_EQ(1, (wc.main_barrier_wait_rval ^ wc.worker_barrier_wait_rval));
66
67 return 0;
68 }
69
70
TEST_IMPL(barrier_2)71 TEST_IMPL(barrier_2) {
72 uv_thread_t thread;
73 worker_config wc;
74
75 memset(&wc, 0, sizeof(wc));
76 wc.delay = 100;
77 wc.niter = 1;
78
79 ASSERT_OK(uv_barrier_init(&wc.barrier, 2));
80 ASSERT_OK(uv_thread_create(&thread, worker, &wc));
81
82 wc.main_barrier_wait_rval = uv_barrier_wait(&wc.barrier);
83
84 ASSERT_OK(uv_thread_join(&thread));
85 uv_barrier_destroy(&wc.barrier);
86
87 ASSERT_EQ(1, (wc.main_barrier_wait_rval ^ wc.worker_barrier_wait_rval));
88
89 return 0;
90 }
91
92
TEST_IMPL(barrier_3)93 TEST_IMPL(barrier_3) {
94 uv_thread_t thread;
95 worker_config wc;
96 unsigned i;
97
98 memset(&wc, 0, sizeof(wc));
99 wc.niter = 5;
100
101 ASSERT_OK(uv_barrier_init(&wc.barrier, 2));
102 ASSERT_OK(uv_thread_create(&thread, worker, &wc));
103
104 for (i = 0; i < wc.niter; i++)
105 wc.main_barrier_wait_rval += uv_barrier_wait(&wc.barrier);
106
107 ASSERT_OK(uv_thread_join(&thread));
108 uv_barrier_destroy(&wc.barrier);
109
110 ASSERT_EQ(wc.niter, wc.main_barrier_wait_rval + wc.worker_barrier_wait_rval);
111
112 return 0;
113 }
114
serial_worker(void * data)115 static void serial_worker(void* data) {
116 uv_barrier_t* barrier;
117 unsigned i;
118
119 barrier = data;
120 for (i = 0; i < 5; i++)
121 uv_barrier_wait(barrier);
122 if (uv_barrier_wait(barrier) > 0)
123 uv_barrier_destroy(barrier);
124
125 uv_sleep(100); /* Wait a bit before terminating. */
126 }
127
128 /* Ensure that uv_barrier_wait returns positive only after all threads have
129 * exited the barrier. If this value is returned too early and the barrier is
130 * destroyed prematurely, then this test may see a crash. */
TEST_IMPL(barrier_serial_thread)131 TEST_IMPL(barrier_serial_thread) {
132 uv_thread_t threads[4];
133 uv_barrier_t barrier;
134 unsigned i;
135
136 ASSERT_OK(uv_barrier_init(&barrier, ARRAY_SIZE(threads) + 1));
137
138 for (i = 0; i < ARRAY_SIZE(threads); ++i)
139 ASSERT_OK(uv_thread_create(&threads[i], serial_worker, &barrier));
140
141 for (i = 0; i < 5; i++)
142 uv_barrier_wait(&barrier);
143 if (uv_barrier_wait(&barrier) > 0)
144 uv_barrier_destroy(&barrier);
145
146 for (i = 0; i < ARRAY_SIZE(threads); ++i)
147 ASSERT_OK(uv_thread_join(&threads[i]));
148
149 return 0;
150 }
151
152 /* Single thread uv_barrier_wait should return correct return value. */
TEST_IMPL(barrier_serial_thread_single)153 TEST_IMPL(barrier_serial_thread_single) {
154 uv_barrier_t barrier;
155
156 ASSERT_OK(uv_barrier_init(&barrier, 1));
157 ASSERT_LT(0, uv_barrier_wait(&barrier));
158 uv_barrier_destroy(&barrier);
159 return 0;
160 }
161
