// ks.h

typedef struct _KSALLOCATOR_DISPATCH {
  PFNKSPININITIALIZEALLOCATOR InitializeAllocator;
  PFNKSDELETEALLOCATOR        DeleteAllocator;
  PFNKSDEFAULTALLOCATE        Allocate;
  PFNKSDEFAULTFREE            Free;
} KSALLOCATOR_DISPATCH, *PKSALLOCATOR_DISPATCH;
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Windows Driver Kit DDI reference (ns-ks-_ksallocator_dispatch)

_KSALLOCATOR_DISPATCH structure

Description

The KSALLOCATOR_DISPATCH structure contains the callbacks required for a pin to implement its own kernel-level allocator.

Members

`InitializeAllocator`

A pointer to a minidriver-supplied AVStrMiniInitializeAllocator callback routine.

`DeleteAllocator`

A pointer to a minidriver-supplied AVStrMiniDeleteAllocator callback routine.

`Allocate`

A pointer to a minidriver-supplied AVStrMiniAllocate callback routine.

`Free`

A pointer to a minidriver-supplied AVStrMiniAllocatorFreeFrame callback routine.

Remarks

By providing a pointer to a KSALLOCATOR_DISPATCH structure in the relevant KSPIN_DISPATCH structure, a minidriver declares that the corresponding pin is capable of performing kernel-level allocation. The allocator might or might not be used by the graph manager. Note that memory allocated at kernel level cannot be passed to a user-mode filter.

KSALLOCATOR_DISPATCH - NtDoc