61 lines
1.2 KiB
C++
61 lines
1.2 KiB
C++
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//===----------------------------------------------------------------------===//
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//
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. 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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// template <class Predicate>
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// void wait(unique_lock<mutex>& lock, Predicate pred);
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#include <condition_variable>
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#include <mutex>
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#include <thread>
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#include <functional>
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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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class Pred
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{
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int& i_;
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public:
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explicit Pred(int& i) : i_(i) {}
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bool operator()() {return i_ != 0;}
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};
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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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cv.wait(lk, Pred(test2));
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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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