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75 lines
2.2 KiB
C++
75 lines
2.2 KiB
C++
//
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// Semaphore_VX.cpp
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//
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// $Id: //poco/1.4/Foundation/src/Semaphore_VX.cpp#1 $
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//
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// Library: Foundation
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// Package: Threading
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// Module: Semaphore
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//
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// Copyright (c) 2004-2011, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// Permission is hereby granted, free of charge, to any person or organization
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// obtaining a copy of the software and accompanying documentation covered by
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// this license (the "Software") to use, reproduce, display, distribute,
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// execute, and transmit the Software, and to prepare derivative works of the
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// Software, and to permit third-parties to whom the Software is furnished to
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// do so, all subject to the following:
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//
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// The copyright notices in the Software and this entire statement, including
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// the above license grant, this restriction and the following disclaimer,
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// must be included in all copies of the Software, in whole or in part, and
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// all derivative works of the Software, unless such copies or derivative
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// works are solely in the form of machine-executable object code generated by
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// a source language processor.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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#include "Poco/Semaphore_VX.h"
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#include <sysLib.h>
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namespace Poco {
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SemaphoreImpl::SemaphoreImpl(int n, int max)
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{
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poco_assert (n >= 0 && max > 0 && n <= max);
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_sem = semCCreate(SEM_Q_PRIORITY, n);
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if (_sem == 0)
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throw Poco::SystemException("cannot create semaphore");
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}
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SemaphoreImpl::~SemaphoreImpl()
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{
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semDelete(_sem);
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}
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void SemaphoreImpl::waitImpl()
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{
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if (semTake(_sem, WAIT_FOREVER) != OK)
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throw SystemException("cannot wait for semaphore");
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}
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bool SemaphoreImpl::waitImpl(long milliseconds)
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{
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int ticks = milliseconds*sysClkRateGet()/1000;
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return semTake(_sem, ticks) == OK;
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}
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} // namespace Poco
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