zone.c File Reference

#include <ntoskrnl.h>
#include <debug.h>

Include dependency graph for zone.c:

Go to the source code of this file.

Macros
#define	NDEBUG

Functions
NTSTATUS NTAPI	ExExtendZone (PZONE_HEADER Zone, PVOID Segment, ULONG SegmentSize)
NTSTATUS NTAPI	ExInterlockedExtendZone (PZONE_HEADER Zone, PVOID Segment, ULONG SegmentSize, PKSPIN_LOCK Lock)
NTSTATUS NTAPI	ExInitializeZone (PZONE_HEADER Zone, ULONG BlockSize, PVOID InitialSegment, ULONG InitialSegmentSize)

Macro Definition Documentation

NDEBUG

#define NDEBUG

Definition at line 13 of file zone.c.

Function Documentation

ExExtendZone()

NTSTATUS NTAPI ExExtendZone	(	PZONE_HEADER	Zone,
		PVOID	Segment,
		ULONG	SegmentSize
	)

Definition at line 23 of file zone.c.

{
    ULONG_PTR Entry;
    ULONG i;
 
    /*
     * BlockSize and Segment must be 8-byte aligned.
     * Blocksize cannot exceed Segment Size.
     */
    if (((ULONG_PTR)Segment & 7) ||
        (SegmentSize & 7) ||
        (Zone->BlockSize > SegmentSize))
    {
        DPRINT1("Invalid ExExtendZone Alignment and/or Size\n");
        return STATUS_INVALID_PARAMETER;
    }
 
    /* Link the Zone and Segment */
    PushEntryList(&Zone->SegmentList,
                  &((PZONE_SEGMENT_HEADER)Segment)->SegmentList);
 
    /* Get to the first entry */
    Entry = (ULONG_PTR)Segment + sizeof(ZONE_SEGMENT_HEADER);
 
    /* Loop through the segments */
    for (i = sizeof(ZONE_SEGMENT_HEADER);
         i <= SegmentSize - Zone->BlockSize;
         i+= Zone->BlockSize)
    {
        /* Link the Free and Segment Lists */
        PushEntryList(&Zone->FreeList, (PSINGLE_LIST_ENTRY)Entry);
 
        /* Go to the next entry */
        Entry += Zone->BlockSize;
    }
 
    /* Update Segment Size */
    Zone->TotalSegmentSize += i;
 
    /* Return Success */
    return STATUS_SUCCESS;
}

Referenced by ExInterlockedExtendZone().

ExInitializeZone()

NTSTATUS NTAPI ExInitializeZone	(	PZONE_HEADER	Zone,
		ULONG	BlockSize,
		PVOID	InitialSegment,
		ULONG	InitialSegmentSize
	)

Definition at line 105 of file zone.c.

{
    ULONG i;
    ULONG_PTR Entry;
 
    /*
     * BlockSize and Segment must be 8-byte aligned.
     * Blocksize cannot exceed Segment Size.
     */
    if (((ULONG_PTR)InitialSegment & 7) ||
        (InitialSegmentSize & 7) ||
        (BlockSize > InitialSegmentSize))
    {
        DPRINT1("Invalid ExInitializeZone Alignment and/or Size\n");
        return STATUS_INVALID_PARAMETER;
    }
 
    /* Set the Zone Header */
    Zone->BlockSize = BlockSize;
 
    /* Link empty list */
    Zone->FreeList.Next = NULL;
    Zone->SegmentList.Next = NULL;
    PushEntryList(&Zone->SegmentList,
                  &((PZONE_SEGMENT_HEADER)InitialSegment)->SegmentList);
    ((PZONE_SEGMENT_HEADER)InitialSegment)->Reserved = NULL;
 
    /* Get first entry */
    Entry = (ULONG_PTR)InitialSegment + sizeof(ZONE_SEGMENT_HEADER);
 
    /* Loop through the segments */
    for (i = sizeof(ZONE_SEGMENT_HEADER);
         i <= InitialSegmentSize - BlockSize;
         i+= BlockSize)
    {
        /* Link the Free and Segment Lists */
        PushEntryList(&Zone->FreeList, (PSINGLE_LIST_ENTRY)Entry);
 
        /* Go to the next entry */
        Entry += Zone->BlockSize;
    }
 
    /* Set Segment Size */
    Zone->TotalSegmentSize = i;
 
    /* Return success */
    return STATUS_SUCCESS;
}

Referenced by UDFInitializeZones().

ExInterlockedExtendZone()

NTSTATUS NTAPI ExInterlockedExtendZone	(	PZONE_HEADER	Zone,
		PVOID	Segment,
		ULONG	SegmentSize,
		PKSPIN_LOCK	Lock
	)

Definition at line 73 of file zone.c.

{
    NTSTATUS Status;
    KIRQL OldIrql;
 
    /* Get the lock */
    KeAcquireSpinLock(Lock, &OldIrql);
 
    /* Extend the Zone */
    Status = ExExtendZone(Zone, Segment, SegmentSize);
 
    /* Release lock and return status */
    KeReleaseSpinLock(Lock, OldIrql);
    return Status;
}