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//
// Copyright © 2019 Arm Ltd. All rights reserved.
// SPDX-License-Identifier: MIT
//
#pragma once
#include <CommandHandlerRegistry.hpp>
#include <Packet.hpp>
#include <atomic>
#include <string>
#include <thread>
namespace armnn
{
namespace gatordmock
{
enum class TargetEndianness
{
BeWire,
LeWire
};
enum class PacketDirection
{
Sending,
ReceivedHeader,
ReceivedData
};
/// A class that implements a Mock Gatord server. It will listen on a specified Unix domain socket (UDS)
/// namespace for client connections. It will then allow opertaions to manage coutners while receiving counter data.
class GatordMockService
{
public:
/// @param registry reference to a command handler registry.
/// @param echoPackets if true the raw packets will be printed to stdout.
GatordMockService(armnn::profiling::CommandHandlerRegistry& registry, bool echoPackets)
: m_HandlerRegistry(registry)
, m_EchoPackets(echoPackets)
, m_CloseReceivingThread(false)
{
m_PacketsReceivedCount.store(0, std::memory_order_relaxed);
}
~GatordMockService()
{
// We have set SOCK_CLOEXEC on these sockets but we'll close them to be good citizens.
close(m_ClientConnection);
close(m_ListeningSocket);
}
/// Establish the Unix domain socket and set it to listen for connections.
/// @param udsNamespace the namespace (socket address) associated with the listener.
/// @return true only if the socket has been correctly setup.
bool OpenListeningSocket(std::string udsNamespace);
/// Block waiting to accept one client to connect to the UDS.
/// @return the file descriptor of the client connection.
int BlockForOneClient();
/// Once the connection is open wait to receive the stream meta data packet from the client. Reading this
/// packet differs from others as we need to determine endianness.
/// @return true only if a valid stream met data packet has been received.
bool WaitForStreamMetaData();
/// Send a connection acknowledged packet back to the client.
void SendConnectionAck();
/// Send a request counter directory packet back to the client.
void SendRequestCounterDir();
/// Start the thread that will receive all packets and print them nicely to stdout.
bool LaunchReceivingThread();
/// Return the total number of periodic counter capture packets received since the receive thread started.
/// @return number of periodic counter capture packets received.
uint32_t GetPacketsReceivedCount()
{
return m_PacketsReceivedCount.load(std::memory_order_acquire);
}
/// This is a placeholder method to prevent main exiting. It can be removed once the
/// command handling code is added.
void WaitForReceivingThread();
// @return true only if the receive thread is closed or closing.
bool ReceiveThreadRunning()
{
return !m_CloseReceivingThread.load();
}
/// Send the counter list to ArmNN.
void SendPeriodicCounterSelectionList(uint32_t period, std::vector<uint16_t> counters);
/// Execute the WAIT command from the comamnd file.
void WaitCommand(uint32_t timeout);
uint32_t GetStreamMetadataVersion()
{
return m_StreamMetaDataVersion;
}
uint32_t GetStreamMetadataMaxDataLen()
{
return m_StreamMetaDataMaxDataLen;
}
uint32_t GetStreamMetadataPid()
{
return m_StreamMetaDataPid;
}
private:
void ReceiveLoop(GatordMockService& mockService);
/// Block on the client connection until a complete packet has been received. This is a placeholder function to
/// enable early testing of the tool.
/// @return true if a valid packet has been received.
armnn::profiling::Packet WaitForPacket(uint32_t timeoutMs);
armnn::profiling::Packet ReceivePacket();
bool SendPacket(uint32_t packetFamily, uint32_t packetId, const uint8_t* data, uint32_t dataLength);
void EchoPacket(PacketDirection direction, uint8_t* packet, size_t lengthInBytes);
bool ReadHeader(uint32_t headerAsWords[2]);
bool ReadFromSocket(uint8_t* packetData, uint32_t expectedLength);
uint32_t ToUint32(uint8_t* data, TargetEndianness endianness);
void InsertU32(uint32_t value, uint8_t* data, TargetEndianness endianness);
static const uint32_t PIPE_MAGIC = 0x45495434;
std::atomic<uint32_t> m_PacketsReceivedCount;
TargetEndianness m_Endianness;
uint32_t m_StreamMetaDataVersion;
uint32_t m_StreamMetaDataMaxDataLen;
uint32_t m_StreamMetaDataPid;
armnn::profiling::CommandHandlerRegistry& m_HandlerRegistry;
bool m_EchoPackets;
int m_ListeningSocket;
int m_ClientConnection;
std::thread m_ListeningThread;
std::atomic<bool> m_CloseReceivingThread;
};
} // namespace gatordmock
} // namespace armnn
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