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CBaseInputPin::ReceiveCanBlock

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Determines if the implementation of the IMemInputPin::Receive method might block on the connected output pin.

HRESULT ReceiveCanBlock(void);

Return Values

Returns an HRESULT value, which can include one of the following values.

S_FALSE Input pin will not block on a Receive method.
S_OK Input pin might block on a Receive method.

Remarks

This member function implements the IMemInputPin::ReceiveCanBlock method. The base class implementation calls the IMemInputPin::ReceiveCanBlock method on the input pin connected to each of the filter's output pins.

This member function is useful because an output pin from a filter might require notification if its thread might be blocked when it calls the Receive method on the connected input pin. For example, a source filter might prefer to keep reading and buffering data rather than be blocked, and might choose to start another thread to wait on the blocking Receive method. See the COutputQueue base class for queuing samples to input pins that potentially block.

 Last updated on Tuesday, July 13, 2004

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