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60 lines
1.0 KiB
C++
60 lines
1.0 KiB
C++
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//
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// Mutex_WIN32.cpp
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//
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// Library: Foundation
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// Package: Threading
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// Module: Mutex
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//
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// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// SPDX-License-Identifier: BSL-1.0
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//
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#include "Poco/Mutex_WIN32.h"
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#include "Poco/Timestamp.h"
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namespace Poco {
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MutexImpl::MutexImpl()
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{
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// the fct has a boolean return value under WInnNt/2000/XP but not on Win98
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// the return only checks if the input address of &_cs was valid, so it is safe to omit it
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InitializeCriticalSectionAndSpinCount(&_cs, 4000);
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}
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MutexImpl::~MutexImpl()
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{
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DeleteCriticalSection(&_cs);
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}
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bool MutexImpl::tryLockImpl(long milliseconds)
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{
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const int sleepMillis = 5;
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Timestamp now;
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Timestamp::TimeDiff diff(Timestamp::TimeDiff(milliseconds)*1000);
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do
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{
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try
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{
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if (TryEnterCriticalSection(&_cs) == TRUE)
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return true;
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}
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catch (...)
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{
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throw SystemException("cannot lock mutex");
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}
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Sleep(sleepMillis);
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}
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while (!now.isElapsed(diff));
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return false;
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}
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} // namespace Poco
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