FxNPagedLookasideListFromPool Class Reference

#include <fxnpagedlookasidelist.hpp>

Inheritance diagram for FxNPagedLookasideListFromPool:

Collaboration diagram for FxNPagedLookasideListFromPool:

Public Member Functions
	FxNPagedLookasideListFromPool (__in PFX_DRIVER_GLOBALS FxDriverGlobals, __in ULONG PoolTag)
virtual _Must_inspect_result_ NTSTATUS	Initialize (__in size_t BufferSize, __in PWDF_OBJECT_ATTRIBUTES MemoryAttributes)
virtual _Must_inspect_result_ NTSTATUS	Allocate (__out FxMemoryObject **PPMemory)
Public Member Functions inherited from FxLookasideListFromPool
	FxLookasideListFromPool (__in PFX_DRIVER_GLOBALS FxDriverGlobals, __in USHORT ObjectSize, __in ULONG PoolTag)
Public Member Functions inherited from FxLookasideList
	FxLookasideList (__in PFX_DRIVER_GLOBALS FxDriverGlobals, __in USHORT ObjectSize, __in ULONG PoolTag)
virtual _Must_inspect_result_ NTSTATUS	Initialize (__in size_t BufferSize, __in PWDF_OBJECT_ATTRIBUTES MemoryAttributes)=0
virtual _Must_inspect_result_ NTSTATUS	Allocate (__out FxMemoryObject **PPMemory)=0
size_t	GetBufferSize (VOID)
Public Member Functions inherited from FxObject
PVOID	GetCOMWrapper ()
void	SetCOMWrapper (__drv_aliasesMem PVOID Wrapper)
	FxObject (__in WDFTYPE Type, __in USHORT Size, __in PFX_DRIVER_GLOBALS FxDriverGlobals)
virtual	~FxObject (VOID)
PVOID __inline	operator new (__in size_t Size, __in PFX_DRIVER_GLOBALS FxDriverGlobals, __in FxObjectType Type)
PVOID __inline	operator new (__in size_t Size, __in PFX_DRIVER_GLOBALS FxDriverGlobals, __in_opt PWDF_OBJECT_ATTRIBUTES Attributes, __in USHORT ExtraSize=0)
VOID	operator delete (__in PVOID Memory)
VOID	SetNoContextHeader (VOID)
PVOID __inline	GetObjectHandle (VOID)
__inline FxContextHeader *	GetContextHeader (VOID)
__inline PFX_DRIVER_GLOBALS	GetDriverGlobals (VOID)
WDFTYPE	GetType (VOID)
USHORT	GetObjectSize (VOID)
LONG	GetRefCnt (VOID)
FxTagTracker *	GetTagTracker (VOID)
CfxDevice *	GetDevice (VOID)
CfxDeviceBase *	GetDeviceBase (VOID)
VOID	SetDeviceBase (__in CfxDeviceBase *DeviceBase)
__inline VOID	CallCleanup (VOID)
ULONG __inline	AddRef (__in_opt PVOID Tag=NULL, __in LONG Line=0, __in_opt PSTR File=NULL)
virtual ULONG	Release (__in_opt PVOID Tag=NULL, __in LONG Line=0, __in_opt PSTR File=NULL)
virtual ULONG	AddRefOverride (__in WDFOBJECT_OFFSET Offset, __in_opt PVOID Tag=NULL, __in LONG Line=0, __in_opt PSTR File=NULL)
virtual ULONG	ReleaseOverride (__in WDFOBJECT_OFFSET Offset, __in_opt PVOID Tag=NULL, __in LONG Line=0, __in_opt PSTR File=NULL)
virtual _Must_inspect_result_ NTSTATUS	QueryInterface (__in FxQueryInterfaceParams *Params)
VOID	MarkTraceState (VOID)
BOOLEAN __inline	IsTraceState (VOID)
VOID __inline	TraceDroppedEvent (__in FxObjectDroppedEvent Event)
VOID	MarkPassiveDispose (__in FxObjectLockState State=ObjectLock)
VOID	MarkPassiveCallbacks (__in FxObjectLockState State=ObjectLock)
VOID	MarkForceDisposeThread (__in FxObjectLockState State=ObjectLock)
BOOLEAN	IsPassiveCallbacks (__in BOOLEAN AcquireLock=TRUE)
BOOLEAN	IsPassiveDispose (__in BOOLEAN AcquireLock=TRUE)
BOOLEAN	IsForceDisposeThread (__in BOOLEAN AcquireLock=TRUE)
VOID	MarkCommitted (VOID)
BOOLEAN	IsCommitted (VOID)
VOID	MarkDisposeOverride (__in FxObjectLockState State=ObjectLock)
VOID	MarkNoDeleteDDI (__in FxObjectLockState State=ObjectLock)
BOOLEAN	IsNoDeleteDDI (VOID)
_Must_inspect_result_ NTSTATUS	Commit (__in_opt PWDF_OBJECT_ATTRIBUTES Attributes, __out_opt WDFOBJECT *ObjectHandle, __in_opt FxObject *Parent=NULL, __in BOOLEAN AssignDriverAsDefaultParent=TRUE)
VOID	DeleteFromFailedCreate (VOID)
VOID	ClearEvtCallbacks (VOID)
BOOLEAN	EarlyDispose (VOID)
virtual VOID	DeleteObject (VOID)
virtual BOOLEAN	Dispose (VOID)
_Must_inspect_result_ NTSTATUS	AssignParentObject (__in FxObject *ParentObject)
_Must_inspect_result_ NTSTATUS	AddContext (__in FxContextHeader *Header, __in PVOID *Context, __in PWDF_OBJECT_ATTRIBUTES Attributes)
_Must_inspect_result_ NTSTATUS	RemoveParentAssignment (VOID)
_Must_inspect_result_ FxObject *	GetParentObjectReferenced (__in PVOID Tag)
BOOLEAN	IsDisposed (VOID)

Protected Member Functions
	~FxNPagedLookasideListFromPool (VOID)
virtual VOID	Reclaim (__in FxMemoryBufferFromLookaside *Memory)
virtual VOID	ReclaimPool (__inout PVOID Pool)
virtual VOID	ReclaimPool (__inout PVOID Pool)=0
Protected Member Functions inherited from FxLookasideList
virtual	~FxLookasideList ()
virtual VOID	Reclaim (__in FxMemoryBufferFromLookaside *Memory)=0
_Must_inspect_result_ NTSTATUS	InitializeLookaside (__in USHORT BufferSize, __in USHORT MemoryObjectSize, __in PWDF_OBJECT_ATTRIBUTES MemoryAttributes)
PVOID	InitObjectAlloc (__out_bcount(this->m_MemoryObjectSize) PVOID Alloc)
Protected Member Functions inherited from FxObject
	FxObject (__in WDFTYPE Type, __in USHORT Size, __in PFX_DRIVER_GLOBALS FxDriverGlobals, __in FxObjectType ObjectType)
FxObjectDebugExtension *	GetDebugExtension (VOID)
BOOLEAN	IsDebug (VOID)
VOID	AllocateTagTracker (__in WDFTYPE Type)
virtual VOID	SelfDestruct (VOID)
PVOID __inline	GetObjectHandleUnchecked (VOID)
VOID __inline	DestroyChildren (VOID)
VOID	DeleteEarlyDisposedObject (VOID)

Protected Attributes
NPAGED_LOOKASIDE_LIST	m_ObjectLookaside
NPAGED_LOOKASIDE_LIST	m_PoolLookaside
Protected Attributes inherited from FxLookasideList
size_t	m_BufferSize
size_t	m_MemoryObjectSize
ULONG	m_PoolTag
Protected Attributes inherited from FxObject
union {
CfxDeviceBase *   m_DeviceBase
CfxDevice *   m_Device
};

Private Attributes
friend	FxMemoryBufferFromPoolLookaside

Additional Inherited Members
Static Public Member Functions inherited from FxObject
static FxObject *	_FromDisposeEntry (__in PSINGLE_LIST_ENTRY Entry)
static FxObject *	_GetObjectFromHandle (__in WDFOBJECT Handle, __inout PWDFOBJECT_OFFSET ObjectOffset)
static PVOID __inline	_ToHandle (__in FxObject *Object)
static VOID __inline	_ReferenceActual (__in WDFOBJECT Object, __in_opt PVOID Tag, __in LONG Line, __in PSTR File)
static VOID __inline	_DereferenceActual (__in WDFOBJECT Object, __in_opt PVOID Tag, __in LONG Line, __in PSTR File)
static PVOID	_GetDebugBase (__in FxObject *Object)
static PFX_POOL_HEADER	_CleanupPointer (__in PFX_DRIVER_GLOBALS FxDriverGlobals, __in FxObject *Object)
static _Must_inspect_result_ NTSTATUS	_GetEffectiveLock (__in FxObject *Object, __in_opt IFxHasCallbacks *Callbacks, __in BOOLEAN AutomaticLocking, __in BOOLEAN PassiveCallbacks, __out FxCallbackLock **CallbackLock, __out_opt FxObject **CallbackLockObject)
static _Must_inspect_result_ NTSTATUS	_ObjectQuery (_In_ FxObject *Object, _In_ CONST GUID *Guid, _In_ ULONG QueryBufferLength, _Out_writes_bytes_(QueryBufferLength) PVOID QueryBuffer)
Public Attributes inherited from FxLookasideList
WDF_OBJECT_ATTRIBUTES	m_MemoryAttributes
Static Protected Member Functions inherited from FxLookasideList
static VOID	_Reclaim (__in PFX_DRIVER_GLOBALS FxDriverGlobals, __inout PNPAGED_LOOKASIDE_LIST List, __in FxMemoryBufferFromLookaside *Memory)
Static Protected Member Functions inherited from FxObject
static PVOID	_GetBase (__in FxObject *Object)

Detailed Description

Definition at line 59 of file fxnpagedlookasidelist.hpp.

Constructor & Destructor Documentation

FxNPagedLookasideListFromPool()

FxNPagedLookasideListFromPool::FxNPagedLookasideListFromPool	(	__in PFX_DRIVER_GLOBALS	FxDriverGlobals,
		__in ULONG	PoolTag
	)

Definition at line 140 of file fxnpagedlookasidelistkm.cpp.

      : FxLookasideListFromPool(FxDriverGlobals, sizeof(*this), PoolTag)
{
}

~FxNPagedLookasideListFromPool()

FxNPagedLookasideListFromPool::~FxNPagedLookasideListFromPool ( VOID  )

protected

Definition at line 147 of file fxnpagedlookasidelistkm.cpp.

{
    if (m_MemoryObjectSize != 0) {
        ExDeleteNPagedLookasideList(&m_ObjectLookaside);
    }
 
    if (m_BufferSize != 0) {
        ExDeleteNPagedLookasideList(&m_PoolLookaside);
    }
}

Member Function Documentation

Allocate()

_Must_inspect_result_ NTSTATUS FxNPagedLookasideListFromPool::Allocate ( __out FxMemoryObject **  PPMemory )

virtual

Implements FxLookasideList.

Definition at line 210 of file fxnpagedlookasidelistkm.cpp.

{
    FxMemoryBufferFromPoolLookaside* pBuffer;
    PVOID pObj, pBuf;
 
    //
    // Allocate the object which will contain the 2ndary allocation
    //
    pObj = FxAllocateFromNPagedLookasideList(&m_ObjectLookaside);
 
    if (pObj == NULL) {
        return STATUS_INSUFFICIENT_RESOURCES;
    }
 
    pObj = InitObjectAlloc(pObj);
 
    //
    // Create the 2ndary allocation (the one the driver writer uses), what will
    // be FxMemoryBufferFromPoolLookaside::m_Pool below.
    //
    pBuf =  FxAllocateFromNPagedLookasideList(&m_PoolLookaside);
    if (pBuf == NULL) {
        //
        // This case is safe because Reclaim doesn't treat the pointer as an
        // object, rather it just performs pointer math and then frees the alloc
        //
        Reclaim((FxMemoryBufferFromPoolLookaside*) pObj);
        return STATUS_INSUFFICIENT_RESOURCES;
    }
 
    //
    // Construct a new FxMemoryBufferFromLookaside using the pool allocated
    // above.
    //
    pBuffer = new(GetDriverGlobals(), pObj, &m_MemoryAttributes)
        FxMemoryBufferFromPoolLookaside(GetDriverGlobals(),
                                        this,
                                        m_BufferSize,
                                        pBuf);
 
    //
    // pBuffer might be displaced if there is a debug extension
    //
    ASSERT(_GetBase(pBuffer) == pObj);
 
    *PPMemory = pBuffer;
 
    return STATUS_SUCCESS;
}

Initialize()

_Must_inspect_result_ NTSTATUS FxNPagedLookasideListFromPool::Initialize ( __in size_t  BufferSize, __in PWDF_OBJECT_ATTRIBUTES  MemoryAttributes  )

virtual

Implements FxLookasideList.

Definition at line 162 of file fxnpagedlookasidelistkm.cpp.

{
    NTSTATUS status;
 
    status = InitializeLookaside(0,
                                 sizeof(FxMemoryBufferFromPoolLookaside),
                                 MemoryAttributes);
 
    if (!NT_SUCCESS(status)) {
        return status;
    }
 
    //
    // Initialize a non-paged pool with these characteristics.
    //
    ExInitializeNPagedLookasideList(&m_ObjectLookaside,
                                    NULL,
                                    NULL,
                                    0,
                                    m_MemoryObjectSize,
                                    m_PoolTag,
                                    0);
 
    m_BufferSize = BufferSize;
 
    //
    // Initialize a non-paged pool with these characteristics.
    //
    // Free and Allocate are left intentionally NULL so that we use the Ex
    // versions.  We want to use the Ex versions because the allocations are >=
    // PAGE_SIZE and we don't want to burn a whole page for pool tracking.
    //
    ExInitializeNPagedLookasideList(&m_PoolLookaside,
                                    NULL,
                                    NULL,
                                    0,
                                    m_BufferSize,
                                    m_PoolTag,
                                    0);
 
    return status;
}

Reclaim()

VOID FxNPagedLookasideListFromPool::Reclaim ( __in FxMemoryBufferFromLookaside *  Memory )

protectedvirtual

Implements FxLookasideList.

Definition at line 263 of file fxnpagedlookasidelistkm.cpp.

{
    _Reclaim(GetDriverGlobals(), &m_ObjectLookaside, Memory);
}

Referenced by Allocate().

ReclaimPool()

virtual VOID FxNPagedLookasideListFromPool::ReclaimPool ( __inout PVOID  Pool )

inlineprotectedvirtual

Implements FxLookasideListFromPool.

Definition at line 97 of file fxnpagedlookasidelist.hpp.

    {
        FxFreeToNPagedLookasideList(&m_PoolLookaside, Pool);
    }

Member Data Documentation

FxMemoryBufferFromPoolLookaside

friend FxNPagedLookasideListFromPool::FxMemoryBufferFromPoolLookaside

private

Definition at line 61 of file fxnpagedlookasidelist.hpp.

Referenced by Allocate().

m_ObjectLookaside

NPAGED_LOOKASIDE_LIST FxNPagedLookasideListFromPool::m_ObjectLookaside

protected

Definition at line 104 of file fxnpagedlookasidelist.hpp.

Referenced by Allocate(), Initialize(), Reclaim(), and ~FxNPagedLookasideListFromPool().

m_PoolLookaside

NPAGED_LOOKASIDE_LIST FxNPagedLookasideListFromPool::m_PoolLookaside

protected

Definition at line 106 of file fxnpagedlookasidelist.hpp.

Referenced by Allocate(), Initialize(), ReclaimPool(), and ~FxNPagedLookasideListFromPool().

---

The documentation for this class was generated from the following files:

• sdk/lib/drivers/wdf/shared/inc/private/common/fxnpagedlookasidelist.hpp
• sdk/lib/drivers/wdf/shared/core/km/fxnpagedlookasidelistkm.cpp
• sdk/lib/drivers/wdf/shared/core/um/fxnpagedlookasidelistum.cpp