56 lines
1.2 KiB
C++
56 lines
1.2 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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// UNSUPPORTED: libcpp-has-no-threads
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// ALLOW_RETRIES: 2
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// <mutex>
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// class recursive_mutex;
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// void lock();
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#include <mutex>
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#include <thread>
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#include <cstdlib>
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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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std::recursive_mutex m;
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typedef std::chrono::system_clock Clock;
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typedef Clock::time_point time_point;
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typedef Clock::duration duration;
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typedef std::chrono::milliseconds ms;
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typedef std::chrono::nanoseconds ns;
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void f()
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{
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time_point t0 = Clock::now();
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m.lock();
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time_point t1 = Clock::now();
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m.lock();
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m.unlock();
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m.unlock();
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ns d = t1 - t0 - ms(250);
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assert(d < ms(200)); // within 200ms
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}
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int main(int, char**)
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{
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m.lock();
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std::thread t = support::make_test_thread(f);
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std::this_thread::sleep_for(ms(250));
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m.unlock();
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t.join();
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return 0;
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}
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