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 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 42 co_thr(void *arg) 43 { 44 VERIFY3S(mtx_lock(&co_mtx), ==, thrd_success); 45 while (co_go == B_FALSE) { 46 (void) cnd_wait(&co_cnd, &co_mtx); 47 } 48 VERIFY3S(mtx_unlock(&co_mtx), ==, thrd_success); 49 call_once(&co_once, co_once_func); 50 return (0); 51 } 52 53 int 54 main(void) 55 { 56 int i; 57 thrd_t threads[CO_NTHREADS]; 58 59 VERIFY3S(mtx_init(&co_once_mtx, mtx_plain), ==, thrd_success); 60 VERIFY3S(mtx_init(&co_mtx, mtx_plain), ==, thrd_success); 61 VERIFY3S(cnd_init(&co_cnd), ==, thrd_success); 62 63 for (i = 0; i < CO_NTHREADS; i++) { 64 VERIFY3S(thrd_create(&threads[i], co_thr, NULL), ==, 65 thrd_success); 66 } 67 68 VERIFY3S(mtx_lock(&co_mtx), ==, thrd_success); 69 co_go = B_TRUE; 70 VERIFY3S(mtx_unlock(&co_mtx), ==, thrd_success); 71 VERIFY3S(cnd_broadcast(&co_cnd), ==, thrd_success); 72 73 for (i = 0; i < CO_NTHREADS; i++) { 74 VERIFY3S(thrd_join(threads[i], NULL), ==, thrd_success); 75 } 76 VERIFY3S(co_val, ==, 42); 77 78 return (0); 79 } 80