81 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// UNSUPPORTED: no-threads10 11// <condition_variable>12 13// class condition_variable;14 15// void notify_all();16 17#include <atomic>18#include <condition_variable>19#include <mutex>20#include <thread>21#include <cassert>22 23#include "make_test_thread.h"24#include "test_macros.h"25 26std::condition_variable cv;27std::mutex mut;28 29int test0 = 0;30int test1 = 0;31int test2 = 0;32 33std::atomic<int> ready_count(0);34 35void f1()36{37 std::unique_lock<std::mutex> lk(mut);38 assert(test1 == 0);39 ready_count += 1;40 while (test1 == 0)41 cv.wait(lk);42 assert(test1 == 1);43 test1 = 2;44}45 46void f2()47{48 std::unique_lock<std::mutex> lk(mut);49 assert(test2 == 0);50 ready_count += 1;51 while (test2 == 0)52 cv.wait(lk);53 assert(test2 == 1);54 test2 = 2;55}56 57int main(int, char**)58{59 std::thread t1 = support::make_test_thread(f1);60 std::thread t2 = support::make_test_thread(f2);61 while (ready_count.load() != 2) {62 std::this_thread::sleep_for(std::chrono::milliseconds(100));63 }64 {65 std::unique_lock<std::mutex>lk(mut);66 test1 = 1;67 test2 = 1;68 }69 cv.notify_all();70 {71 std::this_thread::sleep_for(std::chrono::milliseconds(100));72 std::unique_lock<std::mutex>lk(mut);73 }74 t1.join();75 t2.join();76 assert(test1 == 2);77 assert(test2 == 2);78 79 return 0;80}81