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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// UNSUPPORTED: libcpp-has-no-threads
// UNSUPPORTED: c++03, c++11
// shared_timed_mutex was introduced in macosx10.12
// UNSUPPORTED: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11}}
// <shared_mutex>
// class shared_timed_mutex;
// void lock();
#include <thread>
#include <atomic>
#include <cstdlib>
#include <cassert>
#include <shared_mutex>
#include "make_test_thread.h"
#include "test_macros.h"
std::shared_timed_mutex m;
typedef std::chrono::system_clock Clock;
typedef Clock::time_point time_point;
typedef Clock::duration duration;
typedef std::chrono::milliseconds ms;
typedef std::chrono::nanoseconds ns;
std::atomic<bool> ready(false);
time_point start;
ms WaitTime = ms(250);
void f()
{
ready.store(true);
m.lock();
time_point t0 = start;
time_point t1 = Clock::now();
m.unlock();
assert(t0.time_since_epoch() > ms(0));
assert(t1 - t0 >= WaitTime);
}
int main(int, char**)
{
m.lock();
std::thread t = support::make_test_thread(f);
while (!ready)
std::this_thread::yield();
start = Clock::now();
std::this_thread::sleep_for(WaitTime);
m.unlock();
t.join();
return 0;
}
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