49 lines
1.3 KiB
C++
49 lines
1.3 KiB
C++
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//===----------------------------------------------------------------------===//
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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: no-threads
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// UNSUPPORTED: c++03, c++11
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// XFAIL: availability-synchronization_library-missing
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// <semaphore>
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#include <semaphore>
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#include <thread>
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#include <chrono>
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#include <cassert>
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#include "make_test_thread.h"
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#include "test_macros.h"
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int main(int, char**)
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{
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auto const start = std::chrono::steady_clock::now();
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std::counting_semaphore<> s(0);
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assert(!s.try_acquire_until(start + std::chrono::milliseconds(250)));
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assert(!s.try_acquire_for(std::chrono::milliseconds(250)));
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std::thread t = support::make_test_thread([&](){
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std::this_thread::sleep_for(std::chrono::milliseconds(250));
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s.release();
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std::this_thread::sleep_for(std::chrono::milliseconds(250));
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s.release();
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});
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assert(s.try_acquire_until(start + std::chrono::seconds(2)));
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assert(s.try_acquire_for(std::chrono::seconds(2)));
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t.join();
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auto const end = std::chrono::steady_clock::now();
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assert(end - start < std::chrono::seconds(10));
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return 0;
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}
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