reactos/ntoskrnl/lpc/close.c

   1 /* $Id: close.c,v 1.13 2004/08/15 16:39:06 chorns Exp $
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS kernel
   5  * FILE:            ntoskrnl/lpc/close.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 <ntoskrnl.h>
  15 #define NDEBUG
  16 #include <internal/debug.h>
  17
  18 /* FUNCTIONS *****************************************************************/
  19
  20 /**********************************************************************
  21  * NAME
  22  *
  23  * DESCRIPTION
  24  *
  25  * ARGUMENTS
  26  *
  27  * RETURN VALUE
  28  *
  29  * REVISIONS
  30  */
  31 VOID STDCALL
  32 NiClosePort (PVOID      ObjectBody, ULONG       HandleCount)
  33 {
  34   PEPORT Port = (PEPORT)ObjectBody;
  35   LPC_MESSAGE Message;
  36
  37   /*
  38    * If the client has just closed its handle then tell the server what
  39    * happened and disconnect this port.
  40    */
  41   if (HandleCount == 0 && Port->State == EPORT_CONNECTED_CLIENT &&
  42       ObGetObjectPointerCount(Port) == 2)
  43     {
  44       Message.MessageSize = sizeof(LPC_MESSAGE);
  45       Message.DataSize = 0;
  46       EiReplyOrRequestPort (Port->OtherPort,
  47                             &Message,
  48                             LPC_PORT_CLOSED,
  49                             Port);
  50       Port->OtherPort->OtherPort = NULL;
  51       Port->OtherPort->State = EPORT_DISCONNECTED;
  52       KeReleaseSemaphore( &Port->OtherPort->Semaphore,
  53                           IO_NO_INCREMENT,
  54                           1,
  55                           FALSE );
  56       ObDereferenceObject (Port);
  57     }
  58
  59   /*
  60    * If the server has closed all of its handles then disconnect the port,
  61    * don't actually notify the client until it attempts an operation.
  62    */
  63   if (HandleCount == 0 && Port->State == EPORT_CONNECTED_SERVER &&
  64       ObGetObjectPointerCount(Port) == 2)
  65     {
  66         Port->OtherPort->OtherPort = NULL;
  67         Port->OtherPort->State = EPORT_DISCONNECTED;
  68         ObDereferenceObject(Port->OtherPort);
  69      }
  70 }
  71
  72
  73 /**********************************************************************
  74  * NAME
  75  *
  76  * DESCRIPTION
  77  *
  78  * ARGUMENTS
  79  *
  80  * RETURN VALUE
  81  *
  82  * REVISIONS
  83  */
  84 VOID STDCALL
  85 NiDeletePort (PVOID     ObjectBody)
  86 {
  87    //   PEPORT Port = (PEPORT)ObjectBody;
  88
  89    //   DPRINT1("Deleting port %x\n", Port);
  90 }
  91
  92
  93 /* EOF */