b64f8b07c1
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@119395 91177308-0d34-0410-b5e6-96231b3b80d8
51 lines
1.0 KiB
C++
51 lines
1.0 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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// <condition_variable>
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// class condition_variable;
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// void wait(unique_lock<mutex>& lock);
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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 test1 = 0;
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int test2 = 0;
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void f()
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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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test1 = 1;
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cv.notify_one();
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while (test2 == 0)
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cv.wait(lk);
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assert(test2 != 0);
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}
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int main()
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{
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std::unique_lock<std::mutex>lk(mut);
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std::thread t(f);
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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 != 0);
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test2 = 1;
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lk.unlock();
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cv.notify_one();
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t.join();
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}
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