/// <summary>
/// Tries to initialize the Registered I/O handle.
/// </summary>
/// <param name="socket">A descriptor that identifies a socket.</param>
/// <param name="result">Contains valid object if operation was successful, <c>null</c> otherwise.</param>
/// <returns><c>true</c> if operation was successful, <c>false</c> otherwise.</returns>
public static unsafe Boolean TryCreate(SOCKET socket, out RIOHandle result)
{
// get function table id
var functionTableId = WinsockInterop.WSAID_MULTIPLE_RIO;
// initialize functions table
var functionTable = new RIO_EXTENSION_FUNCTION_TABLE();
// get table size
var tableSize = (UInt32) sizeof(RIO_EXTENSION_FUNCTION_TABLE);
// will contain actual table size
UInt32 actualTableSize;
// try get registered IO functions table
var tryGetTableResult = WinsockInterop.WSAIoctl(socket, WinsockInterop.SIO_GET_MULTIPLE_EXTENSION_FUNCTION_POINTER, &functionTableId, 16, &functionTable, tableSize, out actualTableSize, IntPtr.Zero, IntPtr.Zero);
// check if attempt was successful
if (tryGetTableResult == WinsockInterop.SOCKET_ERROR)
{
result = null;
// return fail
return false;
}
// create registered I/O handle
result = new RIOHandle(ref functionTable);
// return success
return true;
}
/// <summary>
/// Initializes a new instance of <see cref="RIOHandle" /> class.
/// </summary>
/// <param name="table">The reference to the table of the functions pointers.</param>
public RIOHandle(ref RIO_EXTENSION_FUNCTION_TABLE table)
{
registerBuffer = Marshal.GetDelegateForFunctionPointer<RIORegisterBuffer>(table.RIORegisterBuffer);
createCompletionQueue = Marshal.GetDelegateForFunctionPointer<RIOCreateCompletionQueue>(table.RIOCreateCompletionQueue);
createRequestQueue = Marshal.GetDelegateForFunctionPointer<RIOCreateRequestQueue>(table.RIOCreateRequestQueue);
notify = Marshal.GetDelegateForFunctionPointer<RIONotify>(table.RIONotify);
dequeueCompletion = Marshal.GetDelegateForFunctionPointer<RIODequeueCompletion>(table.RIODequeueCompletion);
receive = Marshal.GetDelegateForFunctionPointer<RIOReceive>(table.RIOReceive);
send = Marshal.GetDelegateForFunctionPointer<RIOSend>(table.RIOSend);
closeCompletionQueue = Marshal.GetDelegateForFunctionPointer<RIOCloseCompletionQueue>(table.RIOCloseCompletionQueue);
deregisterBuffer = Marshal.GetDelegateForFunctionPointer<RIODeregisterBuffer>(table.RIODeregisterBuffer);
resizeCompletionQueue = Marshal.GetDelegateForFunctionPointer<RIOResizeCompletionQueue>(table.RIOResizeCompletionQueue);
resizeRequestQueue = Marshal.GetDelegateForFunctionPointer<RIOResizeRequestQueue>(table.RIOResizeRequestQueue);
}
