StdLib/BsdSocketLib/poll.c

   1 /** @file
   2   Implement the poll API.
   3
   4   Copyright (c) 2011, Intel Corporation
   5   All rights reserved. This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include <SocketInternals.h>
  16
  17
  18 /**
  19   Poll the socket for activity
  20
  21   @param [in] pDescriptor Descriptor address for the file
  22
  23   @param [in] Events      Mask of events to detect
  24
  25   @return     Detected events for the socket
  26
  27  **/
  28 short
  29 BslSocketPoll (
  30   IN struct __filedes * pDescriptor,
  31   IN short Events
  32   )
  33 {
  34   short DetectedEvents;
  35   EFI_SOCKET_PROTOCOL * pSocketProtocol;
  36   EFI_STATUS Status;
  37
  38   //
  39   //  Locate the socket protocol
  40   //
  41   DetectedEvents = 0;
  42   pSocketProtocol = BslValidateSocketFd ( pDescriptor, &errno );
  43   if ( NULL != pSocketProtocol ) {
  44     //
  45     //  Poll the socket
  46     //
  47     Status = pSocketProtocol->pfnPoll ( pSocketProtocol,
  48                                         Events,
  49                                         &DetectedEvents,
  50                                         &errno );
  51   }
  52
  53   //
  54   //  Return the detected events
  55   //
  56   return DetectedEvents;
  57 }