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53 lines
864 B
C++
53 lines
864 B
C++
//
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// Semaphore_VX.cpp
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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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// SPDX-License-Identifier: BSL-1.0
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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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