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