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IMemInputPin::ReceiveCanBlock

  • Article

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

HRESULT ReceiveCanBlock(void);

Return Values

Can return any HRESULT value. The following specific success values can be returned.

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

Remarks

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 to be blocked, and may choose to start another thread to wait on the blocking Receive method.

If your implementation of Receive calls a downstream filter's Receive method on the same thread, the application will block if that filter blocks, and this method must indicate that.

 Last updated on Tuesday, July 13, 2004

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