1 /*
2 * This file and its contents are supplied under the terms of the
3 * Common Development and Distribution License ("CDDL"), version 1.0.
4 * You may only use this file in accordance with the terms of version
5 * 1.0 of the CDDL.
6 *
7 * A full copy of the text of the CDDL should have accompanied this
8 * source. A copy of the CDDL is also available via the Internet at
9 * http://www.illumos.org/license/CDDL.
10 */
11
12 /*
13 * Copyright 2016 Joyent, Inc.
14 */
15
16 /*
17 * Test call_once(3C)
18 */
19
20 #include <threads.h>
21 #include <sys/debug.h>
22
23 #define CO_NTHREADS 32
24
25 static int co_val = 41;
26 static mtx_t co_once_mtx;
27 static mtx_t co_mtx;
28 static boolean_t co_go = B_FALSE;
29 static once_flag co_once = ONCE_FLAG_INIT;
30 static cnd_t co_cnd;
31
32 static void
co_once_func(void)33 co_once_func(void)
34 {
35 VERIFY3S(mtx_lock(&co_once_mtx), ==, thrd_success);
36 co_val++;
37 VERIFY3S(mtx_unlock(&co_once_mtx), ==, thrd_success);
38 }
39
40 /*ARGSUSED*/
41 static int
co_thr(void * arg)42 co_thr(void *arg)
43 {
44 VERIFY3S(mtx_lock(&co_mtx), ==, thrd_success);
45 while (co_go == B_FALSE)
46 cnd_wait(&co_cnd, &co_mtx);
47 VERIFY3S(mtx_unlock(&co_mtx), ==, thrd_success);
48 call_once(&co_once, co_once_func);
49 return (0);
50 }
51
52 int
main(void)53 main(void)
54 {
55 int i;
56 thrd_t threads[CO_NTHREADS];
57
58 VERIFY3S(mtx_init(&co_once_mtx, mtx_plain), ==, thrd_success);
59 VERIFY3S(mtx_init(&co_mtx, mtx_plain), ==, thrd_success);
60 VERIFY3S(cnd_init(&co_cnd), ==, thrd_success);
61
62 for (i = 0; i < CO_NTHREADS; i++) {
63 VERIFY3S(thrd_create(&threads[i], co_thr, NULL), ==,
64 thrd_success);
65 }
66
67 VERIFY3S(mtx_lock(&co_mtx), ==, thrd_success);
68 co_go = B_TRUE;
69 VERIFY3S(mtx_unlock(&co_mtx), ==, thrd_success);
70 VERIFY3S(cnd_broadcast(&co_cnd), ==, thrd_success);
71
72 for (i = 0; i < CO_NTHREADS; i++) {
73 VERIFY3S(thrd_join(threads[i], NULL), ==, thrd_success);
74 }
75 VERIFY3S(co_val, ==, 42);
76
77 return (0);
78 }
79