94 lines
2.0 KiB
C++
94 lines
2.0 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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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// FLAKY_TEST.
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// <condition_variable>
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// class condition_variable_any;
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// template <class Lock, class Rep, class Period>
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// cv_status
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// wait_for(Lock& lock, const chrono::duration<Rep, Period>& rel_time);
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#include <condition_variable>
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#include <mutex>
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#include <thread>
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#include <chrono>
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#include <cassert>
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std::condition_variable_any cv;
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typedef std::timed_mutex L0;
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typedef std::unique_lock<L0> L1;
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L0 m0;
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int test1 = 0;
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int test2 = 0;
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int runs = 0;
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void f()
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{
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typedef std::chrono::system_clock Clock;
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typedef std::chrono::milliseconds milliseconds;
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L1 lk(m0);
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assert(test2 == 0);
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test1 = 1;
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cv.notify_one();
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Clock::time_point t0 = Clock::now();
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while (test2 == 0 &&
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cv.wait_for(lk, milliseconds(250)) == std::cv_status::no_timeout)
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;
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Clock::time_point t1 = Clock::now();
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if (runs == 0)
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{
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assert(t1 - t0 < milliseconds(250));
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assert(test2 != 0);
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}
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else
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{
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assert(t1 - t0 - milliseconds(250) < milliseconds(50));
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assert(test2 == 0);
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}
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++runs;
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}
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int main(int, char**)
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{
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{
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L1 lk(m0);
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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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test1 = 0;
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test2 = 0;
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{
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L1 lk(m0);
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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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lk.unlock();
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t.join();
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}
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return 0;
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}
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