KSSTREAMALLOCATOR_FUNCTIONTABLE structure (ks.h)
Clients can request the function table of a given allocator by sending a KSSTREAMALLOCATOR_FUNCTIONTABLE structure in a KSPROPERTY_STREAMALLOCATOR_FUNCTIONTABLE property request.
Syntax
typedef struct {
PFNALLOCATOR_ALLOCATEFRAME AllocateFrame;
PFNALLOCATOR_FREEFRAME FreeFrame;
} KSSTREAMALLOCATOR_FUNCTIONTABLE, *PKSSTREAMALLOCATOR_FUNCTIONTABLE;
Members
AllocateFrame
Points to a KStrAllocateFrame routine.
FreeFrame
Points to a KStrFreeFrame routine.
Remarks
This property is only supported by allocators supporting the DISPATCH_LEVEL function interface. Allocators supporting this property must be able to allocate and free frames at IRQL <= DISPATCH_LEVEL.
Because the DISPATCH_LEVEL interface is closely associated with the IRP-based interface, acquiring the function table is likely to result in the creation of an internal notification event to allow pending I/O to be completed when frames are returned to the free list. When the handle to the allocator is closed, the function table pointers are invalid and the associated events are automatically disabled.
This property is only accessible from kernel-mode.
Requirements
| Requirement | Value |
|---|---|
| Header | ks.h (include Ks.h) |