fxmemorybufferfromlookaside.hpp

Go to the documentation of this file.

/*++
 
Copyright (c) Microsoft Corporation
 
Module Name:
 
    FxMemoryBufferFromLookaside.hpp
 
Abstract:
 
Author:
 
Environment:
 
    kernel mode only
 
Revision History:
 
--*/
 
#ifndef _FXMEMORYBUFFERFROMLOOKASIDE_H_
#define _FXMEMORYBUFFERFROMLOOKASIDE_H_
 
class FxMemoryBufferFromLookaside : public FxMemoryObject {
 
public:
    FxMemoryBufferFromLookaside(
        __in PFX_DRIVER_GLOBALS FxDriverGlobals,
        __inout FxLookasideList* Lookaside,
        __in size_t BufferSize
        );
 
    _Must_inspect_result_
    PVOID
    operator new(
        __in size_t Size,
        __in PFX_DRIVER_GLOBALS FxDriverGlobals,
        __inout PVOID ValidMemory,
        __in size_t BufferSize,
        __in PWDF_OBJECT_ATTRIBUTES Attributes
        );
 
    virtual
    PVOID
    GetBuffer(
        VOID
        );
 
protected:
    FxMemoryBufferFromLookaside(
        __in PFX_DRIVER_GLOBALS FxDriverGlobals,
        __inout FxLookasideList* Lookaside,
        __in size_t BufferSize,
        __in USHORT ObjectSize
        );
 
    ~FxMemoryBufferFromLookaside(
        );
 
    VOID
    Init(
        VOID
        );
 
    virtual
    VOID
    SelfDestruct(
        VOID
        );
 
    FxLookasideList* m_pLookaside;
};
 
class FxMemoryBufferFromPoolLookaside : public FxMemoryBufferFromLookaside {
public:
    FxMemoryBufferFromPoolLookaside(
        __in PFX_DRIVER_GLOBALS FxDriverGlobals,
        __inout FxLookasideList* Lookaside,
        __in size_t BufferSize,
        __in_bcount(BufferSize) PVOID Buffer
        );
 
    _Must_inspect_result_
    PVOID
    operator new(
        __in size_t Size,
        __in PFX_DRIVER_GLOBALS FxDriverGlobals,
        __inout PVOID ValidMemory,
        __in PWDF_OBJECT_ATTRIBUTES Attributes
        );
 
    virtual
    PVOID
    GetBuffer(
        VOID
        )
    {
        return m_Pool;
    }
 
protected:
    FxMemoryBufferFromPoolLookaside(
        __in PFX_DRIVER_GLOBALS FxDriverGlobals,
        __inout FxLookasideList* Lookaside,
        __in size_t BufferSize,
        __in_bcount(BufferSize) PVOID Buffer,
        __in USHORT ObjectSize
        );
 
    virtual
    VOID
    SelfDestruct(
        VOID
        );
 
    PVOID m_Pool;
};
 
class FxMemoryPagedBufferFromPoolLookaside : public FxMemoryBufferFromPoolLookaside {
public:
    FxMemoryPagedBufferFromPoolLookaside(
        __in PFX_DRIVER_GLOBALS FxDriverGlobals,
        __inout FxLookasideList* Lookaside,
        __in size_t BufferSize,
        __in_bcount(BufferSize) PVOID Buffer,
        __in FxDeviceBase* DeviceBase
        ) :  FxMemoryBufferFromPoolLookaside(FxDriverGlobals,
                                             Lookaside,
                                             BufferSize,
                                             Buffer,
                                             sizeof(*this))
    {
        SetDeviceBase(DeviceBase);
    }
};
#endif // _FXMEMORYBUFFERFROMLOOKASIDE_H_