1*d1c5dc47SRobert Mustacchi /*
2*d1c5dc47SRobert Mustacchi * This file and its contents are supplied under the terms of the
3*d1c5dc47SRobert Mustacchi * Common Development and Distribution License ("CDDL"), version 1.0.
4*d1c5dc47SRobert Mustacchi * You may only use this file in accordance with the terms of version
5*d1c5dc47SRobert Mustacchi * 1.0 of the CDDL.
6*d1c5dc47SRobert Mustacchi *
7*d1c5dc47SRobert Mustacchi * A full copy of the text of the CDDL should have accompanied this
8*d1c5dc47SRobert Mustacchi * source. A copy of the CDDL is also available via the Internet at
9*d1c5dc47SRobert Mustacchi * http://www.illumos.org/license/CDDL.
10*d1c5dc47SRobert Mustacchi */
11*d1c5dc47SRobert Mustacchi
12*d1c5dc47SRobert Mustacchi /*
13*d1c5dc47SRobert Mustacchi * Copyright 2016 Joyent, Inc.
14*d1c5dc47SRobert Mustacchi */
15*d1c5dc47SRobert Mustacchi
16*d1c5dc47SRobert Mustacchi /*
17*d1c5dc47SRobert Mustacchi * Test call_once(3C)
18*d1c5dc47SRobert Mustacchi */
19*d1c5dc47SRobert Mustacchi
20*d1c5dc47SRobert Mustacchi #include <threads.h>
21*d1c5dc47SRobert Mustacchi #include <sys/debug.h>
22*d1c5dc47SRobert Mustacchi
23*d1c5dc47SRobert Mustacchi #define CO_NTHREADS 32
24*d1c5dc47SRobert Mustacchi
25*d1c5dc47SRobert Mustacchi static int co_val = 41;
26*d1c5dc47SRobert Mustacchi static mtx_t co_once_mtx;
27*d1c5dc47SRobert Mustacchi static mtx_t co_mtx;
28*d1c5dc47SRobert Mustacchi static boolean_t co_go = B_FALSE;
29*d1c5dc47SRobert Mustacchi static once_flag co_once = ONCE_FLAG_INIT;
30*d1c5dc47SRobert Mustacchi static cnd_t co_cnd;
31*d1c5dc47SRobert Mustacchi
32*d1c5dc47SRobert Mustacchi static void
co_once_func(void)33*d1c5dc47SRobert Mustacchi co_once_func(void)
34*d1c5dc47SRobert Mustacchi {
35*d1c5dc47SRobert Mustacchi VERIFY3S(mtx_lock(&co_once_mtx), ==, thrd_success);
36*d1c5dc47SRobert Mustacchi co_val++;
37*d1c5dc47SRobert Mustacchi VERIFY3S(mtx_unlock(&co_once_mtx), ==, thrd_success);
38*d1c5dc47SRobert Mustacchi }
39*d1c5dc47SRobert Mustacchi
40*d1c5dc47SRobert Mustacchi /*ARGSUSED*/
41*d1c5dc47SRobert Mustacchi static int
co_thr(void * arg)42*d1c5dc47SRobert Mustacchi co_thr(void *arg)
43*d1c5dc47SRobert Mustacchi {
44*d1c5dc47SRobert Mustacchi VERIFY3S(mtx_lock(&co_mtx), ==, thrd_success);
45*d1c5dc47SRobert Mustacchi while (co_go == B_FALSE)
46*d1c5dc47SRobert Mustacchi cnd_wait(&co_cnd, &co_mtx);
47*d1c5dc47SRobert Mustacchi VERIFY3S(mtx_unlock(&co_mtx), ==, thrd_success);
48*d1c5dc47SRobert Mustacchi call_once(&co_once, co_once_func);
49*d1c5dc47SRobert Mustacchi return (0);
50*d1c5dc47SRobert Mustacchi }
51*d1c5dc47SRobert Mustacchi
52*d1c5dc47SRobert Mustacchi int
main(void)53*d1c5dc47SRobert Mustacchi main(void)
54*d1c5dc47SRobert Mustacchi {
55*d1c5dc47SRobert Mustacchi int i;
56*d1c5dc47SRobert Mustacchi thrd_t threads[CO_NTHREADS];
57*d1c5dc47SRobert Mustacchi
58*d1c5dc47SRobert Mustacchi VERIFY3S(mtx_init(&co_once_mtx, mtx_plain), ==, thrd_success);
59*d1c5dc47SRobert Mustacchi VERIFY3S(mtx_init(&co_mtx, mtx_plain), ==, thrd_success);
60*d1c5dc47SRobert Mustacchi VERIFY3S(cnd_init(&co_cnd), ==, thrd_success);
61*d1c5dc47SRobert Mustacchi
62*d1c5dc47SRobert Mustacchi for (i = 0; i < CO_NTHREADS; i++) {
63*d1c5dc47SRobert Mustacchi VERIFY3S(thrd_create(&threads[i], co_thr, NULL), ==,
64*d1c5dc47SRobert Mustacchi thrd_success);
65*d1c5dc47SRobert Mustacchi }
66*d1c5dc47SRobert Mustacchi
67*d1c5dc47SRobert Mustacchi VERIFY3S(mtx_lock(&co_mtx), ==, thrd_success);
68*d1c5dc47SRobert Mustacchi co_go = B_TRUE;
69*d1c5dc47SRobert Mustacchi VERIFY3S(mtx_unlock(&co_mtx), ==, thrd_success);
70*d1c5dc47SRobert Mustacchi VERIFY3S(cnd_broadcast(&co_cnd), ==, thrd_success);
71*d1c5dc47SRobert Mustacchi
72*d1c5dc47SRobert Mustacchi for (i = 0; i < CO_NTHREADS; i++) {
73*d1c5dc47SRobert Mustacchi VERIFY3S(thrd_join(threads[i], NULL), ==, thrd_success);
74*d1c5dc47SRobert Mustacchi }
75*d1c5dc47SRobert Mustacchi VERIFY3S(co_val, ==, 42);
76*d1c5dc47SRobert Mustacchi
77*d1c5dc47SRobert Mustacchi return (0);
78*d1c5dc47SRobert Mustacchi }
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