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Niall Ryan
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Niall Ryan
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,167 @@ | ||
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| #include "ProtoBufRemote/SocketRpcChannel.h" | ||
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| #include "ProtoBufRemote/RpcController.h" | ||
| #include "ProtoBufRemote/RpcMessage.pb.h" | ||
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| namespace ProtoBufRemote { | ||
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| SocketRpcChannel::SocketRpcChannel(RpcController* controller, SOCKET socket) | ||
| : RpcChannel(controller), m_socket(socket) | ||
| { | ||
| m_sendEvent = WSACreateEvent(); | ||
| m_terminateEvent = WSACreateEvent(); | ||
| } | ||
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| SocketRpcChannel::~SocketRpcChannel() | ||
| { | ||
| CloseAndJoin(); | ||
| WSACloseEvent(m_sendEvent); | ||
| WSACloseEvent(m_terminateEvent); | ||
| } | ||
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| void SocketRpcChannel::Start() | ||
| { | ||
| m_thread = boost::thread(&SocketRpcChannel::Run, this); | ||
| } | ||
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| void SocketRpcChannel::CloseAndJoin() | ||
| { | ||
| WSASetEvent(m_terminateEvent); | ||
| m_thread.join(); | ||
| } | ||
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| void SocketRpcChannel::Send(const RpcMessage& message) | ||
| { | ||
| QueuedMessageData data; | ||
| unsigned int messageSize = message.ByteSize(); | ||
| data.m_size = messageSize + sizeof(int); | ||
| data.m_data = new char[data.m_size]; | ||
| *reinterpret_cast<unsigned int*>(data.m_data) = messageSize; | ||
| message.SerializeToArray(data.m_data+sizeof(int), messageSize); | ||
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| boost::lock_guard<boost::mutex> lock(m_sendMutex); | ||
| m_sendMessages.push(data); | ||
| WSASetEvent(m_sendEvent); | ||
| } | ||
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| void SocketRpcChannel::Run() | ||
| { | ||
| WSAEVENT selectEvent = WSACreateEvent(); | ||
| WSAEventSelect(m_socket, selectEvent, FD_READ|FD_WRITE); | ||
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| bool isSending = false; | ||
| unsigned int sendPos = 0; | ||
| QueuedMessageData currentSendMessage; | ||
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| bool isReceiving = false; | ||
| unsigned int receivePos = 0; | ||
| unsigned int receiveSize = sizeof(int); | ||
| std::vector<char> receiveBuffer; | ||
| receiveBuffer.resize(1024); | ||
| const unsigned int maxAllowedMessageSize = 1024*1024; | ||
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| WSAEVENT events[3] = { m_terminateEvent, selectEvent, m_sendEvent }; | ||
| for ( ;; ) | ||
| { | ||
| int waitResult = WSAWaitForMultipleEvents(isSending ? 2 : 3, events, FALSE, WSA_INFINITE, FALSE); | ||
| if (waitResult == 0) | ||
| break; | ||
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| bool isSendReady = false; | ||
| bool isReceiveReady = false; | ||
| if (waitResult == 2) | ||
| { | ||
| assert(!isSending); | ||
| boost::lock_guard<boost::mutex> lock(m_sendMutex); | ||
| if (!m_sendMessages.empty()) | ||
| { | ||
| currentSendMessage = m_sendMessages.front(); | ||
| m_sendMessages.pop(); | ||
| isSending = true; | ||
| isSendReady = true; //send immediately | ||
| sendPos = 0; | ||
| } | ||
| } | ||
| else | ||
| { | ||
| WSANETWORKEVENTS networkEvents; | ||
| int result = WSAEnumNetworkEvents(m_socket, selectEvent, &networkEvents); | ||
| isSendReady = (networkEvents.lNetworkEvents & FD_WRITE) ? true : false; | ||
| isReceiveReady = (networkEvents.lNetworkEvents & FD_READ) ? true : false; | ||
| } | ||
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| if (isSending && isSendReady) | ||
| { | ||
| int bytesSent = send(m_socket, ¤tSendMessage.m_data[sendPos], currentSendMessage.m_size-sendPos, 0); | ||
| if (bytesSent != SOCKET_ERROR) | ||
| { | ||
| sendPos += bytesSent; | ||
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| if (sendPos >= currentSendMessage.m_size) | ||
| { | ||
| delete[] currentSendMessage.m_data; | ||
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| boost::lock_guard<boost::mutex> lock(m_sendMutex); | ||
| if (m_sendMessages.empty()) | ||
| { | ||
| WSAResetEvent(m_sendEvent); | ||
| isSending = false; | ||
| } | ||
| else | ||
| { | ||
| currentSendMessage = m_sendMessages.front(); | ||
| m_sendMessages.pop(); | ||
| sendPos = 0; | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| if (isReceiveReady) | ||
| { | ||
| int bytesReceived = recv(m_socket, &receiveBuffer[receivePos], receiveSize-receivePos, 0); | ||
| if (bytesReceived == 0) | ||
| break; | ||
| if (bytesReceived != SOCKET_ERROR) | ||
| { | ||
| receivePos += bytesReceived; | ||
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| if (receivePos >= receiveSize) | ||
| { | ||
| if (isReceiving) | ||
| { | ||
| RpcMessage message; | ||
| message.ParseFromArray(&receiveBuffer[0], receiveSize); | ||
| m_controller->Receive(message); | ||
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| isReceiving = false; | ||
| receiveSize = sizeof(int); | ||
| receivePos = 0; | ||
| } | ||
| else | ||
| { | ||
| isReceiving = true; | ||
| receiveSize = *reinterpret_cast<unsigned int*>(&receiveBuffer[0]); | ||
| receivePos = 0; | ||
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| if (receiveSize > maxAllowedMessageSize) | ||
| { | ||
| assert(false); | ||
| break; //better to abort rather than allocate based on bad data | ||
| } | ||
| if (receiveBuffer.size() < receiveSize) | ||
| receiveBuffer.resize(receiveSize); | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| closesocket(m_socket); | ||
| m_socket = INVALID_SOCKET; | ||
| WSACloseEvent(selectEvent); | ||
| } | ||
|
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| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,43 @@ | ||
| #ifndef PROTOBUFREMOTE_SOCKETRPCCHANNEL_H | ||
| #define PROTOBUFREMOTE_SOCKETRPCCHANNEL_H 1 | ||
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| #include <winsock2.h> | ||
| #include <queue> | ||
| #include <boost/thread.hpp> | ||
| #include "ProtoBufRemote/RpcChannel.h" | ||
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| namespace ProtoBufRemote { | ||
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| class SocketRpcChannel : RpcChannel | ||
| { | ||
| public: | ||
| SocketRpcChannel(RpcController* controller, SOCKET socket); | ||
| virtual ~SocketRpcChannel(); | ||
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| void Start(); | ||
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| void CloseAndJoin(); | ||
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| virtual void Send(const RpcMessage& message); | ||
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| private: | ||
| void Run(); | ||
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| SOCKET m_socket; | ||
| boost::thread m_thread; | ||
| WSAEVENT m_sendEvent; | ||
| WSAEVENT m_terminateEvent; | ||
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| boost::mutex m_sendMutex; | ||
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| struct QueuedMessageData | ||
| { | ||
| unsigned int m_size; | ||
| char* m_data; | ||
| }; | ||
| std::queue<QueuedMessageData> m_sendMessages; | ||
| }; | ||
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| } | ||
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| #endif |
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