forked from OSchip/llvm-project
70 lines
1.4 KiB
C++
70 lines
1.4 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// UNSUPPORTED: libcpp-has-no-threads
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// <condition_variable>
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// class condition_variable;
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// void notify_all();
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#include <condition_variable>
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#include <mutex>
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#include <thread>
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#include <cassert>
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std::condition_variable cv;
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std::mutex mut;
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int test0 = 0;
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int test1 = 0;
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int test2 = 0;
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void f1()
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{
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std::unique_lock<std::mutex> lk(mut);
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assert(test1 == 0);
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while (test1 == 0)
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cv.wait(lk);
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assert(test1 == 1);
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test1 = 2;
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}
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void f2()
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{
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std::unique_lock<std::mutex> lk(mut);
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assert(test2 == 0);
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while (test2 == 0)
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cv.wait(lk);
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assert(test2 == 1);
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test2 = 2;
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}
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int main()
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{
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std::thread t1(f1);
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std::thread t2(f2);
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std::this_thread::sleep_for(std::chrono::milliseconds(100));
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{
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std::unique_lock<std::mutex>lk(mut);
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test1 = 1;
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test2 = 1;
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}
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cv.notify_all();
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{
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std::this_thread::sleep_for(std::chrono::milliseconds(100));
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std::unique_lock<std::mutex>lk(mut);
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}
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t1.join();
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t2.join();
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assert(test1 == 2);
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assert(test2 == 2);
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}
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