3b52a8950f
boost::this_thread::sleep_for is allowed to sleep longer than the requested sleep time. This seems to happen especially on virtualized systems, such as CircleCI.
92 lines
2.1 KiB
C++
92 lines
2.1 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// Copyright (C) 2011 Vicente J. Botet Escriba
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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// <boost/thread/mutex.hpp>
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// class mutex;
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// bool try_lock();
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#include <boost/thread/mutex.hpp>
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#include <boost/thread/thread.hpp>
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#include <boost/detail/lightweight_test.hpp>
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#include "../../../timming.hpp"
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boost::mutex m;
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#if defined BOOST_THREAD_USES_CHRONO
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typedef boost::chrono::high_resolution_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 boost::chrono::milliseconds ms;
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typedef boost::chrono::nanoseconds ns;
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time_point t0;
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time_point t1;
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#endif
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const ms max_diff(BOOST_THREAD_TEST_TIME_MS);
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void f()
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{
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#if defined BOOST_THREAD_USES_CHRONO
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t0 = Clock::now();
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BOOST_TEST(!m.try_lock());
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BOOST_TEST(!m.try_lock());
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BOOST_TEST(!m.try_lock());
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while (!m.try_lock())
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;
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t1 = Clock::now();
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m.unlock();
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#else
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//time_point t0 = Clock::now();
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//BOOST_TEST(!m.try_lock());
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//BOOST_TEST(!m.try_lock());
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//BOOST_TEST(!m.try_lock());
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while (!m.try_lock())
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;
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//time_point t1 = Clock::now();
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m.unlock();
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//ns d = t1 - t0 - ms(250);
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//BOOST_TEST(d < max_diff);
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#endif
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}
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int main()
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{
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m.lock();
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boost::thread t(f);
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#if defined BOOST_THREAD_USES_CHRONO
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time_point t2 = Clock::now();
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boost::this_thread::sleep_for(ms(250));
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time_point t3 = Clock::now();
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#endif
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m.unlock();
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t.join();
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#if defined BOOST_THREAD_USES_CHRONO
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ns sleep_time = t3 - t2;
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ns d_ns = t1 - t0 - sleep_time;
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ms d_ms = boost::chrono::duration_cast<boost::chrono::milliseconds>(d_ns);
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// BOOST_TEST_GE(d_ms.count(), 0);
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BOOST_THREAD_TEST_IT(d_ms, max_diff);
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BOOST_THREAD_TEST_IT(d_ns, ns(max_diff));
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#endif
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return boost::report_errors();
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}
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