CRNRWLock.h

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/* Copyright 2011-2015 CoReNum, INSA-Lyon
 * 
 * This file is part of libcrn.
 * 
 * libcrn is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * libcrn 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 Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with libcrn.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * file: CRNRWLock.h
 * \author Yann LEYDIER
 */

#ifndef CRNRWLock_HEADER
#define CRNRWLock_HEADER

#include <CRN.h>

namespace crn
{
    class RWLock
    {
        public:
            RWLock();
            ~RWLock();
            RWLock(const RWLock &) = delete;
            RWLock(RWLock&&) = delete;
            RWLock& operator=(const RWLock&) = delete;
            RWLock& operator=(RWLock&&) = delete;

            void WaitReadLock();
            void ReadUnlock();

            void WaitWriteLock();
            void WriteUnlock();
            
            class ReadLock
            {
                public:
                    ReadLock(RWLock &l):lock(l) { lock.WaitReadLock(); }
                    ~ReadLock() { lock.ReadUnlock(); }
                private:
                    RWLock &lock;
            };

            class WriteLock
            {
                public:
                    WriteLock(RWLock &l):lock(l) { lock.WaitWriteLock(); }
                    ~WriteLock() { lock.WriteUnlock(); }
                private:
                    RWLock &lock;
            };

        private:
            struct internal_data;
            std::unique_ptr<internal_data> data;
    };
}

#endif