PFLT_CONTEXT_FREE_CALLBACK - NtDoc
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// fltkernel.h
PFLT_CONTEXT_FREE_CALLBACK PfltContextFreeCallback;
VOID PfltContextFreeCallback(
[in] PVOID Pool,
[in] FLT_CONTEXT_TYPE ContextType
)
{...}
View the official Windows Driver Kit DDI referenceNo description available.
A minifilter can register a routine of type PFLT_CONTEXT_FREE_CALLBACK as the minifilter driver's ContextFreeCallback routine.
Pool [in]A pointer to the context to be freed.
ContextType [in]The type of context. This parameter is required and must be one of the following values:
FLT_FILE_CONTEXT (starting with Windows Vista)
FLT_INSTANCE_CONTEXT
FLT_STREAM_CONTEXT
FLT_STREAMHANDLE_CONTEXT
FLT_SECTION_CONTEXT (starting with Windows 8)
FLT_TRANSACTION_CONTEXT (starting with Windows Vista)
FLT_VOLUME_CONTEXT
For the rare cases that a minifilter driver must free its own contexts manually, the minifilter driver can specify a routine of type PFLT_CONTEXT_FREE_CALLBACK as the minifilter driver's ContextFreeCallback routine for each context type that it registers when it calls FltRegisterFilter from its DriverEntry routine. To specify this routine, the minifilter driver stores a pointer to the routine in the ContextFreeCallback member of the FLT_CONTEXT_REGISTRATION structure for the context type.
For more information about context registration, see the reference entry for FLT_CONTEXT_REGISTRATION.
PFLT_CONTEXT_ALLOCATE_CALLBACK