reactos/ntoskrnl/mm/wset.c

   1 /* $Id$
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS kernel
   5  * FILE:            ntoskrnl/mm/wset.c
   6  * PURPOSE:         Manages working sets
   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 NTSTATUS
  20 MmTrimUserMemory(ULONG Target, ULONG Priority, PULONG NrFreedPages)
  21 {
  22    PFN_TYPE CurrentPage;
  23    PFN_TYPE NextPage;
  24    NTSTATUS Status;
  25
  26    (*NrFreedPages) = 0;
  27
  28    CurrentPage = MmGetLRUFirstUserPage();
  29    while (CurrentPage != 0 && Target > 0)
  30    {
  31       NextPage = MmGetLRUNextUserPage(CurrentPage);
  32
  33       Status = MmPageOutPhysicalAddress(CurrentPage);
  34       if (NT_SUCCESS(Status))
  35       {
  36          DPRINT("Succeeded\n");
  37          Target--;
  38          (*NrFreedPages)++;
  39       }
  40       else if (Status == STATUS_PAGEFILE_QUOTA)
  41       {
  42          MmSetLRULastPage(CurrentPage);
  43       }
  44
  45       CurrentPage = NextPage;
  46    }
  47    return(STATUS_SUCCESS);
  48 }
  49
  50 /*
  51  * @unimplemented
  52  */
  53 ULONG
  54 STDCALL
  55 MmTrimAllSystemPagableMemory (
  56         IN ULONG PurgeTransitionList
  57         )
  58 {
  59         UNIMPLEMENTED;
  60         return 0;
  61 }