FltGetStreamHandleContext function

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NTSTATUS FLTAPI FltGetStreamHandleContext(
  PFLT_INSTANCE Instance,
  PFILE_OBJECT  FileObject,
  PFLT_CONTEXT  *Context
);

Parameters

Instance

Opaque instance pointer for the minifilter driver instance whose context is to be retrieved.

FileObject

Pointer to a file object for the stream handle.

Context

Pointer to a caller-allocated variable that receives the address of the context.

Return value

FltGetStreamHandleContext returns STATUS_SUCCESS or an appropriate NTSTATUS value, such as one of the following:

Remarks

FltGetStreamHandleContext retrieves a context that was set for a stream handle by a given minifilter driver.

FltGetStreamHandleContext increments the reference count on the context that the Context parameter points to. When this context pointer is no longer needed, the caller must decrement its reference count by calling FltReleaseContext. Thus every successful call to FltGetStreamHandleContext must be matched by a subsequent call to FltReleaseContext.

To set a context for a stream handle, call FltSetStreamHandleContext.

To allocate a new context, call FltAllocateContext.

To delete a stream handle context, call FltDeleteStreamHandleContext or FltDeleteContext.

Requirements