audk/StdLib/BsdSocketLib/poll.c

/** @file
  Implement the poll API.

  Copyright (c) 2011, Intel Corporation
  All rights reserved. This program and the accompanying materials
  are licensed and made available under the terms and conditions of the BSD License
  which accompanies this distribution.  The full text of the license may be found at
  http://opensource.org/licenses/bsd-license.php

  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#include <SocketInternals.h>


/**
  Poll the socket for activity

  @param [in] pDescriptor Descriptor address for the file

  @param [in] Events      Mask of events to detect

  @return     Detected events for the socket

 **/
short
EFIAPI
BslSocketPoll (
  IN struct __filedes * pDescriptor,
  IN short Events
  )
{
  short DetectedEvents;
  EFI_SOCKET_PROTOCOL * pSocketProtocol;
  EFI_STATUS Status;

  //
  //  Locate the socket protocol
  //
  DetectedEvents = 0;
  pSocketProtocol = BslValidateSocketFd ( pDescriptor, &errno );
  if ( NULL != pSocketProtocol ) {
    //
    //  Poll the socket
    //
    Status = pSocketProtocol->pfnPoll ( pSocketProtocol,
                                        Events,
                                        &DetectedEvents,
                                        &errno );
  }

  //
  //  Return the detected events
  //
  return DetectedEvents;
}