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//
// Copyright © 2019 Arm Ltd. All rights reserved.
// SPDX-License-Identifier: MIT
//
#include "BufferManager.hpp"
#include "PacketBuffer.hpp"
namespace armnn
{
namespace profiling
{
BufferManager::BufferManager(unsigned int numberOfBuffers, unsigned int maxPacketSize)
: m_MaxBufferSize(maxPacketSize),
m_NumberOfBuffers(numberOfBuffers)
{
Initialize();
}
IPacketBufferPtr BufferManager::Reserve(unsigned int requestedSize, unsigned int& reservedSize)
{
reservedSize = 0;
std::unique_lock<std::mutex> availableListLock(m_AvailableMutex, std::defer_lock);
if (requestedSize > m_MaxBufferSize)
{
return nullptr;
}
availableListLock.lock();
if (m_AvailableList.empty())
{
availableListLock.unlock();
return nullptr;
}
IPacketBufferPtr buffer = std::move(m_AvailableList.back());
m_AvailableList.pop_back();
availableListLock.unlock();
reservedSize = requestedSize;
return buffer;
}
void BufferManager::Commit(IPacketBufferPtr& packetBuffer, unsigned int size)
{
std::unique_lock<std::mutex> readableListLock(m_ReadableMutex, std::defer_lock);
packetBuffer->Commit(size);
readableListLock.lock();
m_ReadableList.push_back(std::move(packetBuffer));
readableListLock.unlock();
}
void BufferManager::Initialize()
{
m_AvailableList.reserve(m_NumberOfBuffers);
for (unsigned int i = 0; i < m_NumberOfBuffers; ++i)
{
IPacketBufferPtr buffer = std::make_unique<PacketBuffer>(m_MaxBufferSize);
m_AvailableList.emplace_back(std::move(buffer));
}
m_ReadableList.reserve(m_NumberOfBuffers);
}
void BufferManager::Release(IPacketBufferPtr& packetBuffer)
{
std::unique_lock<std::mutex> availableListLock(m_AvailableMutex, std::defer_lock);
packetBuffer->Release();
availableListLock.lock();
m_AvailableList.push_back(std::move(packetBuffer));
availableListLock.unlock();
}
void BufferManager::Reset()
{
//This method should only be called once all threads have been joined
std::lock_guard<std::mutex> readableListLock(m_ReadableMutex);
std::lock_guard<std::mutex> availableListLock(m_AvailableMutex);
m_AvailableList.clear();
m_ReadableList.clear();
Initialize();
}
IPacketBufferPtr BufferManager::GetReadableBuffer()
{
std::unique_lock<std::mutex> readableListLock(m_ReadableMutex);
if (!m_ReadableList.empty())
{
IPacketBufferPtr buffer = std::move(m_ReadableList.back());
m_ReadableList.pop_back();
readableListLock.unlock();
return buffer;
}
return nullptr;
}
void BufferManager::MarkRead(IPacketBufferPtr& packetBuffer)
{
std::unique_lock<std::mutex> availableListLock(m_AvailableMutex, std::defer_lock);
packetBuffer->MarkRead();
availableListLock.lock();
m_AvailableList.push_back(std::move(packetBuffer));
availableListLock.unlock();
}
} // namespace profiling
} // namespace armnn
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