Windows注册的I / O Win 8.1 RioCreateRequestQueue错误10045

Question

Using Win8.1 and Visual Studio 2013, I've tested every example of Windows Registered I/O that I can find (about 5). All result in error 10045 on RioCreateRequestQueue() as shown below on one.

c:>rioServerTest.exe
InitialiseRio Start
InitialiseRio End
CreateCompletionQueue Start
CreateCompletionQueue End
CreateRequestQueue start
RIOCreateRequestQueue Error: 10045

Related code is :

void *pContext = 0;

printf("CreateRequestQueue start\n");

g_requestQueue = g_rio.RIOCreateRequestQueue(
    g_socket,     // Socket
    (ULONG) 10,   // MaxOutstandingReceive,
    (ULONG) 1,    // maxReceiveDataBuffers,
    (ULONG) 10,   // MaxOutstandingSend,
    (ULONG) 1,    // MaxSendDataBuffers
    g_completionQueue,   // ReceiveCQ
    g_completionQueue,   // SendCQ
    pContext);                      // SocketContect

    if (g_requestQueue == RIO_INVALID_RQ) {
        printf_s("RIOCreateRequestQueue Error: %d\n", GetLastError());
        exit(1);
    }

    printf("CreateRequestQueue End\n");

According to the literature that I have read, Registered I/O is intended to work with Windows 8 and later and Windows Server 2012 and later.

Can anyone explain to me via an example how to get this to work on Win8.1? TIA

Answer 1

10045 is WSAEOPNOTSUPP the description of which is "Operation not supported. The attempted operation is not supported for the type of object referenced. Usually this occurs when a socket descriptor to a socket that cannot support this operation is trying to accept a connection on a datagram socket."

So actually it's likely that the code we need to see is in fact where you create your socket.

Your socket creation code should look something like this:

   socket = ::WSASocket(
      AF_INET,
      SOCK_DGRAM,
      IPPROTO_UDP,
      NULL,
      0,
      WSA_FLAG_REGISTERED_IO);

I have some example articles (including a whole suite of RIO, UDP server designs with complete source code) here , all of these run on all operating systems that RIO supports.