reactos/ntoskrnl/lpc/close.c

   1 /* $Id: close.c,v 1.5 2001/06/23 19:13:33 phreak 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 <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
  23 /**********************************************************************
  24  * NAME
  25  *
  26  * DESCRIPTION
  27  *
  28  * ARGUMENTS
  29  *
  30  * RETURN VALUE
  31  *
  32  * REVISIONS
  33  *
  34  */
  35 VOID
  36 NiClosePort (PVOID      ObjectBody, ULONG       HandleCount)
  37 {
  38   PEPORT Port = (PEPORT)ObjectBody;
  39   LPC_MESSAGE Message;
  40
  41   /*
  42    * If the client has just closed its handle then tell the server what
  43    * happened and disconnect this port.
  44    */
  45   if (HandleCount == 0 && Port->State == EPORT_CONNECTED_CLIENT &&
  46       ObGetReferenceCount(Port) == 2)
  47     {
  48       Message.MessageSize = sizeof(LPC_MESSAGE);
  49       Message.DataSize = 0;
  50       EiReplyOrRequestPort (Port->OtherPort,
  51                             &Message,
  52                             LPC_PORT_CLOSED,
  53                             Port);
  54       Port->OtherPort->OtherPort = NULL;
  55       Port->OtherPort->State = EPORT_DISCONNECTED;
  56       KeReleaseSemaphore( &Port->OtherPort->Semaphore,
  57                           IO_NO_INCREMENT,
  58                           1,
  59                           FALSE );
  60       ObDereferenceObject (Port);
  61     }
  62
  63   /*
  64    * If the server has closed all of its handles then disconnect the port,
  65    * don't actually notify the client until it attempts an operation.
  66    */
  67   if (HandleCount == 0 && Port->State == EPORT_CONNECTED_SERVER &&
  68       ObGetReferenceCount(Port) == 2)
  69     {
  70         Port->OtherPort->OtherPort = NULL;
  71         Port->OtherPort->State = EPORT_DISCONNECTED;
  72         ObDereferenceObject(Port->OtherPort);
  73      }
  74 }
  75
  76
  77 /**********************************************************************
  78  * NAME
  79  *
  80  * DESCRIPTION
  81  *
  82  * ARGUMENTS
  83  *
  84  * RETURN VALUE
  85  *
  86  * REVISIONS
  87  *
  88  */
  89 VOID
  90 NiDeletePort (PVOID     ObjectBody)
  91 {
  92    //   PEPORT Port = (PEPORT)ObjectBody;
  93
  94    //   DPRINT1("Deleting port %x\n", Port);
  95 }
  96
  97
  98 /* EOF */