reactos/ntoskrnl/ke/critical.c

   1 /* $Id: critical.c,v 1.10 2004/08/15 16:39:05 chorns Exp $
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS kernel
   5  * FILE:            ntoskrnl/ke/critical.c
   6  * PURPOSE:         Implement critical regions
   7  * PROGRAMMER:      David Welch (welch@mcmail.com)
   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  * @implemented
  22  */
  23 VOID STDCALL KeEnterCriticalRegion (VOID)
  24 {
  25    DPRINT("KeEnterCriticalRegion()\n");
  26    KeGetCurrentThread()->KernelApcDisable--;
  27 }
  28
  29 /*
  30  * @implemented
  31  */
  32 VOID STDCALL KeLeaveCriticalRegion (VOID)
  33 {
  34   PKTHREAD Thread = KeGetCurrentThread();
  35
  36   DPRINT("KeLeaveCriticalRegion()\n");
  37
  38   /* Reference: http://www.ntfsd.org/archive/ntfsd0104/msg0203.html */
  39   if(++Thread->KernelApcDisable == 0)
  40   {
  41     if (!IsListEmpty(&Thread->ApcState.ApcListHead[KernelMode]))
  42     {
  43       Thread->ApcState.KernelApcPending = TRUE;
  44       HalRequestSoftwareInterrupt(APC_LEVEL);
  45     }
  46   }
  47
  48 }
  49
  50 /* EOF */