如何在使用IOCP时初始化WSAOVERLAPPED？

Question

我不确定如何在使用IOCP时初始化WSAOVERLAPPED。我根本不认为我需要初始化它，我只将WSAOVERLAPPED.hEvent设置为NULL（不确定是否有必要）。这段代码是否正确：

// Send data
char buffer[1024];

WSABUF wsaBuf;
wsaBuf.buf = buffer;
wsaBuf.len = 1024;

WSAOVERLAPPED wsaOverlapped;
wsaOverlapped.hEvent = NULL;

WSASend(s, &wsaBuf, 1, NULL, 0, &wsaOverlapped, NULL);

此外，使用OVERLAPPED时初始化WSARecv()与初始化WSAOVERLAPPED相同吗？

Answer 1

WSAOVERLAPPED结构受the same rules as the OVERLAPPED structure的约束，即

  

在结构用于函数调用之前，应始终将此结构的任何未使用的成员初始化为零。否则，该函数可能会失败并返回ERROR_INVALID_PARAMETER。

Answer 2

   memset(&wsaOverlapped, 0, sizeof(wsaOverlapped));

或者明确地将所有值设置为零。