mirror of
https://github.com/reactos/reactos.git
synced 2024-09-19 09:09:53 +00:00
110 lines
2.6 KiB
C
110 lines
2.6 KiB
C
/*
|
|
* COPYRIGHT: See COPYING in the top level directory
|
|
* PROJECT: ReactOS kernel
|
|
* FILE: ntoskrnl/mm/pager.c
|
|
* PURPOSE: Moves infrequently used data out of memory
|
|
*
|
|
* PROGRAMMERS: David Welch (welch@cwcom.net)
|
|
*/
|
|
|
|
/* INCLUDES ****************************************************************/
|
|
|
|
#include <ntoskrnl.h>
|
|
#define NDEBUG
|
|
#include <internal/debug.h>
|
|
|
|
/* GLOBALS *******************************************************************/
|
|
|
|
#if 0
|
|
static HANDLE PagerThreadHandle;
|
|
static CLIENT_ID PagerThreadId;
|
|
static KEVENT PagerThreadEvent;
|
|
static BOOLEAN PagerThreadShouldTerminate;
|
|
static ULONG PagerThreadWorkCount;
|
|
#endif
|
|
|
|
/* FUNCTIONS *****************************************************************/
|
|
|
|
#if 0
|
|
BOOLEAN
|
|
MiIsPagerThread(VOID)
|
|
{
|
|
return(PsGetCurrentThreadId() == PagerThreadId.UniqueThread);
|
|
}
|
|
|
|
VOID
|
|
MiStartPagerThread(VOID)
|
|
{
|
|
ULONG WasWorking;
|
|
|
|
WasWorking = InterlockedIncrement(&PagerThreadWorkCount);
|
|
if (WasWorking == 1)
|
|
{
|
|
KeSetEvent(&PagerThreadEvent, IO_NO_INCREMENT, FALSE);
|
|
}
|
|
}
|
|
|
|
VOID
|
|
MiStopPagerThread(VOID)
|
|
{
|
|
(VOID)InterlockedDecrement(&PagerThreadWorkCount);
|
|
}
|
|
|
|
static NTSTATUS STDCALL
|
|
MmPagerThreadMain(PVOID Ignored)
|
|
{
|
|
NTSTATUS Status;
|
|
|
|
for(;;)
|
|
{
|
|
/* Wake for a low memory situation or a terminate request. */
|
|
Status = KeWaitForSingleObject(&PagerThreadEvent,
|
|
0,
|
|
KernelMode,
|
|
FALSE,
|
|
NULL);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
DbgPrint("PagerThread: Wait failed\n");
|
|
KEBUGCHECK(0);
|
|
}
|
|
if (PagerThreadShouldTerminate)
|
|
{
|
|
DbgPrint("PagerThread: Terminating\n");
|
|
return(STATUS_SUCCESS);
|
|
}
|
|
do
|
|
{
|
|
/* Try and make some memory available to the system. */
|
|
MmRebalanceMemoryConsumers();
|
|
}
|
|
while(PagerThreadWorkCount > 0);
|
|
}
|
|
}
|
|
|
|
NTSTATUS MmInitPagerThread(VOID)
|
|
{
|
|
NTSTATUS Status;
|
|
|
|
PagerThreadShouldTerminate = FALSE;
|
|
PagerThreadWorkCount = 0;
|
|
KeInitializeEvent(&PagerThreadEvent,
|
|
SynchronizationEvent,
|
|
FALSE);
|
|
|
|
Status = PsCreateSystemThread(&PagerThreadHandle,
|
|
THREAD_ALL_ACCESS,
|
|
NULL,
|
|
NULL,
|
|
&PagerThreadId,
|
|
(PKSTART_ROUTINE) MmPagerThreadMain,
|
|
NULL);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
return(Status);
|
|
}
|
|
|
|
return(STATUS_SUCCESS);
|
|
}
|
|
#endif
|