reactos/ntoskrnl/lpc/query.c

   1 /* $Id$
   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  *
   8  * PROGRAMMERS:     David Welch (welch@cwcom.net)
   9  */
  10
  11 /* INCLUDES *****************************************************************/
  12
  13 #include <ntoskrnl.h>
  14 #define NDEBUG
  15 #include <internal/debug.h>
  16
  17 /* FUNCTIONS *****************************************************************/
  18
  19 /**********************************************************************
  20  * NAME                                                 EXPORTED
  21  *      NtQueryInformationPort@20
  22  *
  23  * DESCRIPTION
  24  *
  25  * ARGUMENTS
  26  *      PortHandle              [IN]
  27  *      PortInformationClass    [IN]
  28  *      PortInformation         [OUT]
  29  *      PortInformationLength   [IN]
  30  *      ReturnLength            [OUT]
  31  *
  32  * RETURN VALUE
  33  *      STATUS_SUCCESS if the call succedeed. An error code
  34  *      otherwise.
  35  *
  36  * NOTES
  37  *      P. Dabak reports that this system service seems to return
  38  *      no information.
  39  */
  40 /*EXPORTED*/ NTSTATUS STDCALL
  41 NtQueryInformationPort (IN      HANDLE  PortHandle,
  42                         IN      CINT    PortInformationClass,
  43                         OUT     PVOID   PortInformation,
  44                         IN      ULONG   PortInformationLength,
  45                         OUT     PULONG  ReturnLength)
  46 {
  47   NTSTATUS      Status;
  48   PEPORT                Port;
  49
  50   Status = ObReferenceObjectByHandle (PortHandle,
  51                                       PORT_ALL_ACCESS,   /* AccessRequired */
  52                                       LpcPortObjectType,
  53                                       UserMode,
  54                                       (PVOID *) & Port,
  55                                       NULL);
  56   if (!NT_SUCCESS(Status))
  57     {
  58       DPRINT("NtQueryInformationPort() = %x\n", Status);
  59       return (Status);
  60     }
  61   /*
  62    * FIXME: NT does nothing here!
  63    */
  64   ObDereferenceObject (Port);
  65   return STATUS_SUCCESS;
  66 }
  67
  68
  69 /* EOF */