76 lines
2.0 KiB
C++
76 lines
2.0 KiB
C++
/**
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* Orthanc - A Lightweight, RESTful DICOM Store
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* Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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* Department, University Hospital of Liege, Belgium
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* Copyright (C) 2017-2023 Osimis S.A., Belgium
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* Copyright (C) 2024-2025 Orthanc Team SRL, Belgium
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* Copyright (C) 2021-2025 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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*
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* This program is free software: you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this program. If not, see
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* <http://www.gnu.org/licenses/>.
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**/
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#include "../PrecompiledHeaders.h"
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#include "Semaphore.h"
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#include "../OrthancException.h"
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namespace Orthanc
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{
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Semaphore::Semaphore(unsigned int availableResources) :
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availableResources_(availableResources)
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{
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}
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unsigned int Semaphore::GetAvailableResourcesCount() const
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{
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return availableResources_;
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}
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void Semaphore::Release(unsigned int resourceCount)
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{
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boost::mutex::scoped_lock lock(mutex_);
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availableResources_ += resourceCount;
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condition_.notify_one();
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}
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void Semaphore::Acquire(unsigned int resourceCount)
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{
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boost::mutex::scoped_lock lock(mutex_);
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while (availableResources_ < resourceCount)
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{
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condition_.wait(lock);
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}
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availableResources_ -= resourceCount;
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}
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bool Semaphore::TryAcquire(unsigned int resourceCount)
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{
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boost::mutex::scoped_lock lock(mutex_);
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if (availableResources_ < resourceCount)
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{
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return false;
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}
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availableResources_ -= resourceCount;
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return true;
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}
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}
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