reactos/ntoskrnl/lpc/query.c

   1 /* $Id: query.c,v 1.8 2003/12/30 18:52:05 fireball Exp $
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS kernel
   5  * FILE:            ntoskrnl/lpc/query.c
   6  * PURPOSE:         Communication mechanism
   7  * PROGRAMMER:      David Welch (welch@cwcom.net)
   8  * UPDATE HISTORY:
   9  *                  Created 22/05/98
  10  */
  11
  12 /* INCLUDES *****************************************************************/
  13
  14 #include <ddk/ntddk.h>
  15 #include <internal/ob.h>
  16 #include <internal/port.h>
  17 #include <internal/dbg.h>
  18
  19 #define NDEBUG
  20 #include <internal/debug.h>
  21
  22 /* FUNCTIONS *****************************************************************/
  23
  24 /**********************************************************************
  25  * NAME                                                 EXPORTED
  26  *      NtQueryInformationPort@20
  27  *
  28  * DESCRIPTION
  29  *
  30  * ARGUMENTS
  31  *      PortHandle              [IN]
  32  *      PortInformationClass    [IN]
  33  *      PortInformation         [OUT]
  34  *      PortInformationLength   [IN]
  35  *      ReturnLength            [OUT]
  36  *
  37  * RETURN VALUE
  38  *      STATUS_SUCCESS if the call succedeed. An error code
  39  *      otherwise.
  40  *
  41  * NOTES
  42  *      P. Dabak reports that this system service seems to return
  43  *      no information.
  44  */
  45 /*EXPORTED*/ NTSTATUS STDCALL
  46 NtQueryInformationPort (IN      HANDLE  PortHandle,
  47                         IN      CINT    PortInformationClass,
  48                         OUT     PVOID   PortInformation,
  49                         IN      ULONG   PortInformationLength,
  50                         OUT     PULONG  ReturnLength)
  51 {
  52   NTSTATUS      Status;
  53   PEPORT                Port;
  54
  55   Status = ObReferenceObjectByHandle (PortHandle,
  56                                       PORT_ALL_ACCESS,   /* AccessRequired */
  57                                       ExPortType,
  58                                       UserMode,
  59                                       (PVOID *) & Port,
  60                                       NULL);
  61   if (!NT_SUCCESS(Status))
  62     {
  63       DPRINT("NtQueryInformationPort() = %x\n", Status);
  64       return (Status);
  65     }
  66   /*
  67    * FIXME: NT does nothing here!
  68    */
  69   ObDereferenceObject (Port);
  70   return STATUS_SUCCESS;
  71 }
  72
  73
  74 /* EOF */