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//
// Copyright © 2019 Arm Ltd. All rights reserved.
// SPDX-License-Identifier: MIT
//
#pragma once
#include "IBufferManager.hpp"
#include "IConsumer.hpp"
#include <condition_variable>
#include <mutex>
#include <vector>
#include <queue>
namespace arm
{
namespace pipe
{
class BufferManager : public IBufferManager
{
public:
BufferManager(unsigned int numberOfBuffers = 5, unsigned int maxPacketSize = 4096);
~BufferManager() {}
IPacketBufferPtr Reserve(unsigned int requestedSize, unsigned int& reservedSize) override;
void Reset();
void Commit(IPacketBufferPtr& packetBuffer, unsigned int size, bool notifyConsumer = true) override;
void Release(IPacketBufferPtr& packetBuffer) override;
IPacketBufferPtr GetReadableBuffer() override;
void MarkRead(IPacketBufferPtr& packetBuffer) override;
/// Set Consumer on the buffer manager to be notified when there is a Commit
/// Can only be one consumer
void SetConsumer(IConsumer* consumer) override;
/// Notify the Consumer buffer can be read
void FlushReadList() override;
private:
void Initialize();
// Maximum buffer size
unsigned int m_MaxBufferSize;
// Number of buffers
const unsigned int m_NumberOfBuffers;
const unsigned int m_MaxNumberOfBuffers;
unsigned int m_CurrentNumberOfBuffers;
// List of available packet buffers
std::vector<IPacketBufferPtr> m_AvailableList;
// List of readable packet buffers
std::queue<IPacketBufferPtr> m_ReadableList;
// Mutex for available packet buffer list
std::mutex m_AvailableMutex;
// Mutex for readable packet buffer list
std::mutex m_ReadableMutex;
// Consumer thread to notify packet is ready to read
IConsumer* m_Consumer = nullptr;
};
} // namespace pipe
} // namespace arm
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