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/**
* Orthanc - A Lightweight, RESTful DICOM Store
* Copyright (C) 2012-2014 Medical Physics Department, CHU of Liege,
* Belgium
*
* This program is free software: you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* In addition, as a special exception, the copyright holders of this
* program give permission to link the code of its release with the
* OpenSSL project's "OpenSSL" library (or with modified versions of it
* that use the same license as the "OpenSSL" library), and distribute
* the linked executables. You must obey the GNU General Public License
* in all respects for all of the code used other than "OpenSSL". If you
* modify file(s) with this exception, you may extend this exception to
* your version of the file(s), but you are not obligated to do so. If
* you do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source files
* in the program, then also delete it here.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
**/
#include "../PrecompiledHeaders.h"
#include "ReaderWriterLock.h"
#include <boost/thread/shared_mutex.hpp>
namespace Orthanc
{
namespace
{
// Anonymous namespace to avoid clashes between compilation
// modules.
class ReaderLockable : public ILockable
{
private:
boost::shared_mutex& lock_;
protected:
virtual void Lock()
{
lock_.lock_shared();
}
virtual void Unlock()
{
lock_.unlock_shared();
}
public:
ReaderLockable(boost::shared_mutex& lock) : lock_(lock)
{
}
};
class WriterLockable : public ILockable
{
private:
boost::shared_mutex& lock_;
protected:
virtual void Lock()
{
lock_.lock();
}
virtual void Unlock()
{
lock_.unlock();
}
public:
WriterLockable(boost::shared_mutex& lock) : lock_(lock)
{
}
};
}
struct ReaderWriterLock::PImpl
{
boost::shared_mutex lock_;
ReaderLockable reader_;
WriterLockable writer_;
PImpl() : reader_(lock_), writer_(lock_)
{
}
};
ReaderWriterLock::ReaderWriterLock()
{
pimpl_ = new PImpl;
}
ReaderWriterLock::~ReaderWriterLock()
{
delete pimpl_;
}
ILockable& ReaderWriterLock::ForReader()
{
return pimpl_->reader_;
}
ILockable& ReaderWriterLock::ForWriter()
{
return pimpl_->writer_;
}
}
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