reactos/ntoskrnl/mm/shutdown.c

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2018-08-13 05:42:57 +00:00
/*
* PROJECT: ReactOS Kernel
* LICENSE: GPL - See COPYING in the top level directory
* FILE: ntoskrnl/mm/shutdown.c
* PURPOSE: Memory Manager Shutdown
* PROGRAMMERS:
*/
/* INCLUDES ******************************************************************/
#include <ntoskrnl.h>
#define NDEBUG
#include <debug.h>
#define MODULE_INVOLVED_IN_ARM3
#include "ARM3/miarm.h"
/* PRIVATE FUNCTIONS *********************************************************/
VOID
MiShutdownSystem(VOID)
{
ULONG i;
PFN_NUMBER Page;
BOOLEAN Dirty;
/* Loop through all the paging files */
for (i = 0; i < MmNumberOfPagingFiles; i++)
{
/* Free page file name */
ASSERT(MmPagingFile[i]->PageFileName.Buffer != NULL);
ExFreePoolWithTag(MmPagingFile[i]->PageFileName.Buffer, TAG_MM);
MmPagingFile[i]->PageFileName.Buffer = NULL;
/* And close them */
ZwClose(MmPagingFile[i]->FileHandle);
}
/* Loop through all the pages owned by the legacy Mm and page them out, if needed. */
/* We do it as long as there are dirty pages, since flushing can cause the FS to dirtify new ones. */
do
{
Dirty = FALSE;
Page = MmGetLRUFirstUserPage();
while (Page)
{
LARGE_INTEGER SegmentOffset;
PMM_SECTION_SEGMENT Segment = MmGetSectionAssociation(Page, &SegmentOffset);
if (Segment)
{
if ((*Segment->Flags) & MM_DATAFILE_SEGMENT)
{
MmLockSectionSegment(Segment);
ULONG_PTR Entry = MmGetPageEntrySectionSegment(Segment, &SegmentOffset);
if (!IS_SWAP_FROM_SSE(Entry) && IS_DIRTY_SSE(Entry))
{
Dirty = TRUE;
MmCheckDirtySegment(Segment, &SegmentOffset, FALSE, TRUE);
}
MmUnlockSectionSegment(Segment);
}
MmDereferenceSegment(Segment);
}
Page = MmGetLRUNextUserPage(Page, FALSE);
}
} while (Dirty);
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}
VOID
MmShutdownSystem(IN ULONG Phase)
{
if (Phase == 0)
{
MiShutdownSystem();
}
else if (Phase == 1)
{
ULONG i;
/* Loop through all the paging files */
for (i = 0; i < MmNumberOfPagingFiles; i++)
{
/* And dereference them */
ObDereferenceObject(MmPagingFile[i]->FileObject);
}
}
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else
{
ASSERT(Phase == 2);
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UNIMPLEMENTED;
}
}