BufferLocked.hpp

/***************************************************************************
  tag: Peter Soetens  Wed Jan 18 14:11:39 CET 2006  BufferLocked.hpp

                        BufferLocked.hpp -  description
                           -------------------
    begin                : Wed January 18 2006
    copyright            : (C) 2006 Peter Soetens
    email                : peter.soetens@mech.kuleuven.be

 ***************************************************************************
 *   This library is free software; you can redistribute it and/or         *
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 *   version 2 of the License.                                             *
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 *   software library without restriction.  Specifically, if other files   *
 *   instantiate templates or use macros or inline functions from this     *
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 *   resulting executable to be covered by the GNU General Public          *
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 *   Public License.                                                       *
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 ***************************************************************************/





#ifndef ORO_CORELIB_BUFFER_LOCKED_HPP
#define ORO_CORELIB_BUFFER_LOCKED_HPP

#include "os/Mutex.hpp"
#include "os/MutexLock.hpp"
#include "BufferInterface.hpp"

namespace RTT
{

    template<class T>
    class BufferLocked
        :public BufferInterface<T>
    {
    public:

        typedef typename ReadInterface<T>::reference_t reference_t;
        typedef typename WriteInterface<T>::param_t param_t;
        typedef typename BufferInterface<T>::size_type size_type;
        typedef T value_t;

        BufferLocked( size_type size, const T& initial_value = T() )
            : buf()
        {
            buf.resize(size, initial_value);
            buf.resize(0);
        }

        ~BufferLocked() {}

        bool Push( param_t item )
        {
            OS::MutexLock locker(lock);
            if ( buf.capacity() == buf.size() )
                return false;
            buf.push_back( item );
            return true;
        }

        size_type Push(const std::vector<T>& items)
        {
            OS::MutexLock locker(lock);
            typename std::vector<T>::const_iterator itl( items.begin() );
            while ( buf.size() != buf.capacity() && itl != items.end() ) {
                buf.push_back( *itl );
                ++itl;
            }
            return (itl - items.begin());

        }
        bool Pop( reference_t item )
        {
            OS::MutexLock locker(lock);
            if ( buf.empty() )
                return false;
            item = buf.front();
            buf.erase( buf.begin() );
            return true;
        }

        size_type Pop(std::vector<T>& items )
        {
            OS::MutexLock locker(lock);
            int quant = 0;
            while ( !buf.empty() ) {
                items.push_back( buf.front() );
                buf.erase( buf.begin() );
                ++quant;
            }
            return quant;
        }

        value_t front() const
        {
            OS::MutexLock locker(lock);
            value_t item = value_t();
            if ( !buf.empty() )
                item = buf.front();
            return item;
        }

        size_type capacity() const {
            OS::MutexLock locker(lock);
            return buf.capacity();
        }

        size_type size() const {
            OS::MutexLock locker(lock);
            return buf.size();
        }

        void clear() {
            OS::MutexLock locker(lock);
            buf.clear();
        }

        bool empty() const {
            return buf.empty();
        }

        bool full() const {
            OS::MutexLock locker(lock);
            return buf.size() ==  buf.capacity();
        }
    private:
        std::vector<T> buf;
        mutable OS::Mutex lock;

    };
}

#endif // BUFFERSIMPLE_HPP