fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi/*
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi * This file and its contents are supplied under the terms of the
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi * Common Development and Distribution License ("CDDL"), version 1.0.
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi * You may only use this file in accordance with the terms of version
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi * 1.0 of the CDDL.
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi *
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi * A full copy of the text of the CDDL should have accompanied this
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi * source. A copy of the CDDL is also available via the Internet at
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi * http://www.illumos.org/license/CDDL.
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi */
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi/*
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi * Copyright 2016 Joyent, Inc.
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi */
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi/*
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi * Test call_once(3C)
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi */
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi#include <threads.h>
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi#include <sys/debug.h>
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi#define CO_NTHREADS 32
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchistatic int co_val = 41;
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchistatic mtx_t co_once_mtx;
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchistatic mtx_t co_mtx;
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchistatic boolean_t co_go = B_FALSE;
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchistatic once_flag co_once = ONCE_FLAG_INIT;
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchistatic cnd_t co_cnd;
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchistatic void
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchico_once_func(void)
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi{
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi VERIFY3S(mtx_lock(&co_once_mtx), ==, thrd_success);
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi co_val++;
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi VERIFY3S(mtx_unlock(&co_once_mtx), ==, thrd_success);
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi}
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi/*ARGSUSED*/
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchistatic int
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchico_thr(void *arg)
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi{
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi VERIFY3S(mtx_lock(&co_mtx), ==, thrd_success);
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi while (co_go == B_FALSE)
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi cnd_wait(&co_cnd, &co_mtx);
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi VERIFY3S(mtx_unlock(&co_mtx), ==, thrd_success);
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi call_once(&co_once, co_once_func);
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi return (0);
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi}
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchiint
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchimain(void)
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi{
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi int i;
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi thrd_t threads[CO_NTHREADS];
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi VERIFY3S(mtx_init(&co_once_mtx, mtx_plain), ==, thrd_success);
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi VERIFY3S(mtx_init(&co_mtx, mtx_plain), ==, thrd_success);
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi VERIFY3S(cnd_init(&co_cnd), ==, thrd_success);
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi for (i = 0; i < CO_NTHREADS; i++) {
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi VERIFY3S(thrd_create(&threads[i], co_thr, NULL), ==,
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi thrd_success);
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi }
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi VERIFY3S(mtx_lock(&co_mtx), ==, thrd_success);
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi co_go = B_TRUE;
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi VERIFY3S(mtx_unlock(&co_mtx), ==, thrd_success);
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi VERIFY3S(cnd_broadcast(&co_cnd), ==, thrd_success);
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi for (i = 0; i < CO_NTHREADS; i++) {
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi VERIFY3S(thrd_join(threads[i], NULL), ==, thrd_success);
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi }
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi VERIFY3S(co_val, ==, 42);
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi return (0);
fc2512cfb727d49529d8ed99164db871f4829b73Robert Mustacchi}