RIO_EXTENSION_FUNCTION_TABLE structure (mswsock.h)
The RIO_EXTENSION_FUNCTION_TABLE structure contains information on the functions that implement the Winsock registered I/O extensions.
Syntax
typedef struct _RIO_EXTENSION_FUNCTION_TABLE {
DWORD cbSize;
LPFN_RIORECEIVE RIOReceive;
LPFN_RIORECEIVEEX RIOReceiveEx;
LPFN_RIOSEND RIOSend;
LPFN_RIOSENDEX RIOSendEx;
LPFN_RIOCLOSECOMPLETIONQUEUE RIOCloseCompletionQueue;
LPFN_RIOCREATECOMPLETIONQUEUE RIOCreateCompletionQueue;
LPFN_RIOCREATEREQUESTQUEUE RIOCreateRequestQueue;
LPFN_RIODEQUEUECOMPLETION RIODequeueCompletion;
LPFN_RIODEREGISTERBUFFER RIODeregisterBuffer;
LPFN_RIONOTIFY RIONotify;
LPFN_RIOREGISTERBUFFER RIORegisterBuffer;
LPFN_RIORESIZECOMPLETIONQUEUE RIOResizeCompletionQueue;
LPFN_RIORESIZEREQUESTQUEUE RIOResizeRequestQueue;
} RIO_EXTENSION_FUNCTION_TABLE, *PRIO_EXTENSION_FUNCTION_TABLE;
Members
cbSize
The size, in bytes, of the structure.
RIOReceive
A pointer to the RIOReceive function.
RIOReceiveEx
A pointer to the RIOReceiveEx function.
RIOSend
A pointer to the RIOSend function.
RIOSendEx
A pointer to the RIOSendEx function.
RIOCloseCompletionQueue
A pointer to the RIOCloseCompletionQueue function.
RIOCreateCompletionQueue
A pointer to the RIOCreateCompletionQueue function.
RIOCreateRequestQueue
A pointer to the RIOCreateRequestQueue function.
RIODequeueCompletion
A pointer to the RIODequeueCompletion function.
RIODeregisterBuffer
A pointer to the RIODeregisterBuffer function.
RIONotify
A pointer to the RIONotify function.
RIORegisterBuffer
A pointer to the RIORegisterBuffer function.
RIOResizeCompletionQueue
A pointer to the RIOResizeCompletionQueue function.
RIOResizeRequestQueue
A pointer to the RIOResizeRequestQueue function.
Remarks
The RIO_EXTENSION_FUNCTION_TABLE structure contains information on the functions that implement the Winsock registered I/O extensions.
The function pointers for the Winsock registered I/O extension functions must be obtained at run time by making a call to the WSAIoctl function with the SIO_GET_MULTIPLE_EXTENSION_FUNCTION_POINTER opcode specified. The input buffer passed to the WSAIoctl function must contain WSAID_MULTIPLE_RIO, a globally unique identifier (GUID) whose value identifies the Winsock registered I/O extension functions. On success, the output returned by the WSAIoctl function contains a pointer to the RIO_EXTENSION_FUNCTION_TABLE structure that contains pointers to the Winsock registered I/O extension functions. The SIO_GET_MULTIPLE_EXTENSION_FUNCTION_POINTER IOCTL is defined in the Ws2def.h header file.The WSAID_MULTIPLE_RIO GUID is defined in the Mswsock.h header file.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 8 [desktop apps only] |
| Minimum supported server | Windows Server 2012 [desktop apps only] |
| Header | mswsock.h (include Mswsock.h) |