Constant _spinTLStreamBufferHandlingModeEnums_StreamBufferHandlingMode_OldestFirst 

pub const _spinTLStreamBufferHandlingModeEnums_StreamBufferHandlingMode_OldestFirst: _spinTLStreamBufferHandlingModeEnums = 0;

< The application always gets the buffer from the head of the output buffer queue (thus, the oldest available one). If the output buffer queue is empty, the application waits for a newly acquired buffer until the timeout expires.