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//
// Copyright © 2021 Arm Ltd and Contributors. All rights reserved.
// SPDX-License-Identifier: MIT
//
#pragma once
#include "Layer.hpp"
#include "Network.hpp"
#include "WorkingMemDescriptor.hpp"
#include <armnn/IWorkingMemHandle.hpp>
#include <armnn/Tensor.hpp>
#include <unordered_map>
namespace armnn
{
namespace experimental
{
class WorkingMemHandle final : public IWorkingMemHandle
{
public:
WorkingMemHandle(NetworkId networkId,
std::vector<WorkingMemDescriptor> workingMemDescriptors,
std::unordered_map<LayerGuid, WorkingMemDescriptor> workingMemDescriptorMap);
~WorkingMemHandle()
{ FreeWorkingMemory(); }
NetworkId GetNetworkId() override
{
return m_NetworkId;
}
/// Allocate the backing memory required for execution. If this is not called, then allocation will be
/// deferred to execution time. The mutex must be locked.
void Allocate() override
{
if (m_IsAllocated)
{
return;
}
m_IsAllocated = true;
// Iterate through all WorkingMemDescriptors calling allocate() on each input and output in turn
for (auto workingMemDescriptor : m_WorkingMemDescriptors)
{
for (auto& input : workingMemDescriptor.m_Inputs)
{
input->Allocate();
}
for (auto& output : workingMemDescriptor.m_Outputs)
{
output->Allocate();
}
}
}
/// Free the backing memory required for execution. The mutex must be locked.
void Free() override
{
if (!m_IsAllocated)
{
return;
}
m_IsAllocated = false;
// Iterate through all WorkingMemDescriptors calling free() on each input and output in turn
for (auto workingMemDescriptor : m_WorkingMemDescriptors)
{
for (auto& input : workingMemDescriptor.m_Inputs)
{
input->Unmap();
}
for (auto& output : workingMemDescriptor.m_Outputs)
{
output->Unmap();
}
}
}
/// IsAllocated returns true if the backing memory is currently allocated. The mutex must be locked.
bool IsAllocated() override
{
return m_IsAllocated;
}
/// Get a mutex which can be used for synchronizing access to the WorkingMemHandle object.
std::mutex& GetMutex() override
{
return m_Mutex;
}
/// Get the WorkingMemDescriptor for a Layer. The mutex must be locked.
WorkingMemDescriptor& GetWorkingMemDescriptor(LayerGuid id) override
{
auto result = m_WorkingMemDescriptorMap.find(id);
ARMNN_ASSERT(result != m_WorkingMemDescriptorMap.end());
return result->second;
}
/// Get the WorkingMemDescriptor at an index. The WorkingMemDescriptors are stored in the same order as
/// the Workloads in a topologically sorted graph. The mutex must be locked.
WorkingMemDescriptor& GetWorkingMemDescriptorAt(unsigned int id) override
{
return m_WorkingMemDescriptors[id];
}
private:
void FreeWorkingMemory();
NetworkId m_NetworkId;
std::shared_ptr<ProfilerImpl> m_Profiler;
std::vector<WorkingMemDescriptor> m_WorkingMemDescriptors;
std::unordered_map<LayerGuid, WorkingMemDescriptor> m_WorkingMemDescriptorMap;
bool m_IsAllocated;
std::mutex m_Mutex;
};
} // end experimental namespace
} // end armnn namespace
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