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//
// Semaphore_VX.cpp
//
// Library: Foundation
// Package: Threading
// Module: Semaphore
//
// Copyright (c) 2004-2011, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/Semaphore_VX.h"
#include <sysLib.h>
namespace Poco {
SemaphoreImpl::SemaphoreImpl(int n, int max)
{
poco_assert (n >= 0 && max > 0 && n <= max);
_sem = semCCreate(SEM_Q_PRIORITY, n);
if (_sem == 0)
throw Poco::SystemException("cannot create semaphore");
}
SemaphoreImpl::~SemaphoreImpl()
{
semDelete(_sem);
}
void SemaphoreImpl::waitImpl()
{
if (semTake(_sem, WAIT_FOREVER) != OK)
throw SystemException("cannot wait for semaphore");
}
bool SemaphoreImpl::waitImpl(long milliseconds)
{
int ticks = milliseconds*sysClkRateGet()/1000;
return semTake(_sem, ticks) == OK;
}
} // namespace Poco
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