forked from OSchip/llvm-project
104 lines
2.3 KiB
C++
104 lines
2.3 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// ÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊThe 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_any;
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// template <class Lock, class Clock, class Duration>
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// cv_status
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// wait_until(Lock& lock, const chrono::time_point<Clock, Duration>& abs_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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struct Clock
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{
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typedef std::chrono::milliseconds duration;
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typedef duration::rep rep;
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typedef duration::period period;
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typedef std::chrono::time_point<Clock> time_point;
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static const bool is_monotonic = true;
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static time_point now()
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{
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using namespace std::chrono;
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return time_point(duration_cast<duration>(
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monotonic_clock::now().time_since_epoch()
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));
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}
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};
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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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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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Clock::time_point t = t0 + Clock::duration(250);
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while (test2 == 0 && cv.wait_until(lk, t) == 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 < Clock::duration(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 - Clock::duration(250) < Clock::duration(5));
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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()
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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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}
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