FixedSizeBuffersManager.h

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/*
 * Copyright (C) 2006-2020 Istituto Italiano di Tecnologia (IIT)
 * All rights reserved.
 *
 * This software may be modified and distributed under the terms of the
 * BSD-3-Clause license. See the accompanying LICENSE file for details.
 */
 
#ifndef YARP_DEV_IMPL_FIXEDSIZEBUFFERSMANAGER_H
#define YARP_DEV_IMPL_FIXEDSIZEBUFFERSMANAGER_H
 
#include <vector>
#include <mutex>
 
 
namespace yarp {
namespace dev {
namespace impl {
 
 
template <typename T>
class Buffer
{
public:
    uint32_t key;
    T* dataPtr;
    uint32_t numOfElements;
 
    Buffer();
 
    ~Buffer();
 
    T* getData();
 
    uint32_t getSize();
 
    T getValue(uint32_t index);
 
    void setValue(uint32_t index, T value);
 
    T& operator[](uint32_t index);
};
 
 
template <typename T>
class FixedSizeBuffersManager
{
public:
    explicit FixedSizeBuffersManager(uint32_t sizeOfBuffers, std::size_t initialNumOfBuffers = 3);
 
    ~FixedSizeBuffersManager();
 
    Buffer<T> getBuffer();
 
    std::size_t getBufferSize();
 
    void releaseBuffer(Buffer<T>& buffer);
 
    void printBuffers();
 
private:
    std::mutex m_mutex;
    std::vector<T*> m_buffers;
    std::vector<bool> m_usedBuffers;
    std::size_t m_numElem;
    uint32_t m_firstFreeBuff; //euristic
};
 
 
} // namespace impl
} // namespace dev
} // namespace yarp
 
#include "FixedSizeBuffersManager-inl.h"
 
#endif // YARP_DEV_IMPL_FIXEDSIZEBUFFERSMANAGER_H