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C++怎么实现iocp进行SOCKET通信

c++
小亿
119
2023-12-08 04:15:32
栏目: 编程语言

要使用IOCP(I/O Completion Ports)来实现C++中的Socket通信,可以按照以下步骤进行操作:

  1. 创建一个IOCP对象:
HANDLE hIOCP = CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, 0, 0);
  1. 创建Socket并绑定到IOCP对象上:
SOCKET sock = socket(AF_INET, SOCK_STREAM, 0);
bind(sock, (SOCKADDR*)&addr, sizeof(addr));
CreateIoCompletionPort((HANDLE)sock, hIOCP, (ULONG_PTR)sock, 0);
  1. 使用WSARecv或WSASend函数进行数据的接收和发送:
WSABUF wsaBuf;
wsaBuf.buf = // 缓冲区指针
wsaBuf.len = // 缓冲区长度

DWORD bytesTransferred = 0;
DWORD flags = 0;
OVERLAPPED* pOverlapped = nullptr;

WSARecv(sock, &wsaBuf, 1, &bytesTransferred, &flags, pOverlapped, nullptr);
  1. 创建一个线程用于接收完成包:
DWORD WINAPI WorkerThread(LPVOID lpParam) {
    while (true) {
        DWORD bytesTransferred = 0;
        ULONG_PTR completionKey = 0;
        LPOVERLAPPED lpOverlapped = nullptr;

        GetQueuedCompletionStatus(hIOCP, &bytesTransferred, &completionKey, &lpOverlapped, INFINITE);

        // 处理接收到的数据

        // 重新投递接收请求
        WSARecv(sock, &wsaBuf, 1, &bytesTransferred, &flags, pOverlapped, nullptr);
    }

    return 0;
}
  1. 创建多个工作线程来处理IOCP中的完成包:
for (int i = 0; i < numThreads; ++i) {
    HANDLE hThread = CreateThread(NULL, 0, WorkerThread, NULL, 0, NULL);
    CloseHandle(hThread);
}

通过以上步骤,就可以使用IOCP来进行Socket通信了。注意,这只是一个基本示例,实际使用时可能需要根据具体需求进行调整和扩展。

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