ntoskrnl/mm/pager.c

   1 /* $Id$
   2  *
   3  * COPYRIGHT:    See COPYING in the top level directory
   4  * PROJECT:      ReactOS kernel
   5  * FILE:         ntoskrnl/mm/pager.c
   6  * PURPOSE:      Moves infrequently used data out of memory
   7  * PROGRAMMER:   David Welch (welch@cwcom.net)
   8  * UPDATE HISTORY:
   9  *               27/05/98: Created
  10  */
  11
  12 /* INCLUDES ****************************************************************/
  13
  14 #include <ddk/ntddk.h>
  15 #include <internal/ps.h>
  16 #include <internal/ke.h>
  17 #include <internal/mm.h>
  18
  19 #define NDEBUG
  20 #include <internal/debug.h>
  21
  22 /* GLOBALS *******************************************************************/
  23
  24 static HANDLE PagerThreadHandle;
  25 static CLIENT_ID PagerThreadId;
  26 static KEVENT PagerThreadEvent;
  27 static BOOLEAN PagerThreadShouldTerminate;
  28
  29 /* FUNCTIONS *****************************************************************/
  30
  31 static NTSTATUS STDCALL
  32 MmPagerThreadMain(PVOID Ignored)
  33 {
  34    NTSTATUS Status;
  35
  36    for(;;)
  37      {
  38         Status = KeWaitForSingleObject(&PagerThreadEvent,
  39                                        0,
  40                                        KernelMode,
  41                                        FALSE,
  42                                        NULL);
  43         if (!NT_SUCCESS(Status))
  44           {
  45              DbgPrint("PagerThread: Wait failed\n");
  46              KeBugCheck(0);
  47           }
  48         if (PagerThreadShouldTerminate)
  49           {
  50              DbgPrint("PagerThread: Terminating\n");
  51              return(STATUS_SUCCESS);
  52           }
  53      }
  54 }
  55
  56 NTSTATUS MmInitPagerThread(VOID)
  57 {
  58    NTSTATUS Status;
  59
  60    PagerThreadShouldTerminate = FALSE;
  61    KeInitializeEvent(&PagerThreadEvent,
  62                      SynchronizationEvent,
  63                      FALSE);
  64
  65    Status = PsCreateSystemThread(&PagerThreadHandle,
  66                                  THREAD_ALL_ACCESS,
  67                                  NULL,
  68                                  NULL,
  69                                  &PagerThreadId,
  70                                  MmPagerThreadMain,
  71                                  NULL);
  72    if (!NT_SUCCESS(Status))
  73      {
  74         return(Status);
  75      }
  76
  77    return(STATUS_SUCCESS);
  78 }