blkcache.c File Reference

#include "bl.h"

Include dependency graph for blkcache.c:

Go to the source code of this file.

Functions
NTSTATUS	BcpDestroy (VOID)
BOOLEAN	BcpCompareKey (_In_ PBL_HASH_ENTRY Entry1, _In_ PBL_HASH_ENTRY Entry2)
ULONG	BcpHashFunction (_In_ PBL_HASH_ENTRY Entry, _In_ ULONG TableSize)
NTSTATUS	BcInitialize (VOID)

Variables
ULONG	BcpBlockAllocatorHandle
ULONG	BcpHashTableId

Function Documentation

BcInitialize()

NTSTATUS BcInitialize

(

VOID

)

Definition at line 73 of file blkcache.c.

{
    NTSTATUS Status;
 
    Status = BlHtCreate(50, BcpHashFunction, BcpCompareKey, &BcpHashTableId);
    if (!NT_SUCCESS(Status))
    {
        goto Quickie;
    }
 
    BcpBlockAllocatorHandle = BlpMmCreateBlockAllocator();
    if (BcpBlockAllocatorHandle == -1)
    {
        Status = STATUS_UNSUCCESSFUL;
        goto Quickie;
    }
 
    Status = BlpIoRegisterDestroyRoutine(BcpDestroy);
    if (Status >= 0)
    {
        return Status;
    }
 
Quickie:
    EfiPrintf(L"Failure path not yet implemented\r\n");
#if 0
    if (BcpHashTableId != -1)
    {
        BlHtDestroy(BcpHashTableId);
    }
    if (BcpBlockAllocatorHandle != -1)
    {
        BlpMmDeleteBlockAllocator(BcpBlockAllocatorHandle);
    }
#endif
    return Status;
}

Referenced by BlockIopInitialize().

BcpCompareKey()

BOOLEAN BcpCompareKey	(	_In_ PBL_HASH_ENTRY	Entry1,
		_In_ PBL_HASH_ENTRY	Entry2
	)

Definition at line 32 of file blkcache.c.

{
    PULONG Value1, Value2;
 
    Value1 = Entry1->Value;
    Value2 = Entry2->Value;
    return Entry1->Size == Entry2->Size && Entry1->Flags == Entry2->Flags && *Value1 == *Value2 && Value1[1] == Value2[1] && Value1[2] == Value2[2];
}

Referenced by BcInitialize().

BcpDestroy()

NTSTATUS BcpDestroy

(

VOID

)

Definition at line 21 of file blkcache.c.

{
    //BcpPurgeCacheEntries();
    //return BlpMmDeleteBlockAllocator(BcpBlockAllocatorHandle);
    EfiPrintf(L"Destructor for block cache not yet implemented\r\n");
    return STATUS_NOT_IMPLEMENTED;
}

Referenced by BcInitialize().

BcpHashFunction()

ULONG BcpHashFunction	(	_In_ PBL_HASH_ENTRY	Entry,
		_In_ ULONG	TableSize
	)

Definition at line 45 of file blkcache.c.

{
    ULONG i, j, ValueHash;
    PUCHAR ValueBuffer;
 
    j = 0;
    ValueHash = 0;
    i = 0;
 
    ValueBuffer = Entry->Value;
 
    do
    {
        ValueHash += ValueBuffer[i++];
    } while (i < 8);
 
    do
    {
        ValueHash += ValueBuffer[j++ + 8];
    } while (j < 4);
 
    return ValueHash % TableSize;
}

Referenced by BcInitialize().

Variable Documentation

BcpBlockAllocatorHandle

ULONG BcpBlockAllocatorHandle

Definition at line 15 of file blkcache.c.

Referenced by BcInitialize().

BcpHashTableId

ULONG BcpHashTableId

Definition at line 16 of file blkcache.c.

Referenced by BcInitialize().