Microsoft DirectX 9.0


The ReceiveCanBlock method determines whether calls to the IMemInputPin::Receive method might block.


HRESULT ReceiveCanBlock(void);

Return Value

Returns an HRESULT value. Possible values include those shown in the following table.

Value Description
S_FALSE The pin will not block on a call to Receive
S_OK The pin might block on a call to Receive.


If this method returns S_FALSE, calls to the Receive method are guaranteed not to block. Otherwise, they might block. An upstream filter can use this method to determine its threading strategy. If calls to Receive can block, the upstream filter might decide to use a worker thread that buffers data.

See Also