fxmemorybufferpreallocated.hpp

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/*++
 
Copyright (c) Microsoft Corporation
 
Module Name:
 
    FxMemoryBufferPreallocated.hpp
 
Abstract:
 
Author:
 
Environment:
 
    kernel mode only
 
Revision History:
 
--*/
 
#ifndef _FXMEMORYBUFFERPREALLOCATED_H_
#define _FXMEMORYBUFFERPREALLOCATED_H_
 
class FxMemoryBufferPreallocated : public FxMemoryObject {
public:
 
    FxMemoryBufferPreallocated(
        _In_ PFX_DRIVER_GLOBALS FxDriverGlobals,
        _Pre_notnull_ _Pre_writable_byte_size_(BufferSize) PVOID Buffer,
        _In_ size_t BufferSize
        );
 
    virtual
    PVOID
    GetBuffer(
        VOID
        )
    {
        return m_pBuffer;
    }
 
    VOID
    UpdateBuffer(
        _Pre_notnull_ _Pre_writable_byte_size_(BufferSize) PVOID Buffer,
        _In_ size_t BufferSize
        );
 
    _Must_inspect_result_
    NTSTATUS
    QueryInterface(
        __inout FxQueryInterfaceParams* Params
        );
 
protected:
    // for derived classes
    FxMemoryBufferPreallocated(
        __in USHORT ObjectSize,
        __in PFX_DRIVER_GLOBALS Globals
        );
 
    FxMemoryBufferPreallocated(
        _In_ PFX_DRIVER_GLOBALS FxDriverGlobals,
        _In_ USHORT ObjectSize,
        _Pre_notnull_ _Pre_writable_byte_size_(BufferSize) PVOID Buffer,
        _In_ size_t BufferSize
        );
 
    ~FxMemoryBufferPreallocated();
 
    PVOID m_pBuffer;
};
#endif //  _FXMEMORYBLOCKPREALLOCATED_H_