Re: Proper way to provide gtk+ app with asynchronous data?



Paul Davis wrote:
just be sure to be aware that this is not a good design if the
data-sending thread is under hard or soft real-time constraints. you
should never force synchronization between the GUI and a real-time
thread, because it can cause the RT thread to block for an unbounded
period. use lock-free techniques (such as single-reader/single-writer
ringbuffers) and/or pipes.

Additionally, you 1) will need some mechanism to make sure that things 
doesn't go bananas if the receiver can't keep up with long-term average 
data bandwidth, so it's not as easy as just putting a buffer in between, 
and 2) you have a data "ownership" problem where thread A passes 
ownership of the data it produces to thread B, which can easily cause 
memory leaks if you're not careful.
Bottom line beeing that if you're _not_ having any realtime constraints, 
it could vice-versa be a good design decision to avoid asynchronous 
mechanisms, because they add unnecessary complexity.
--
Christer Palm



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