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One of the challenges with these async constructs is that they are harder to reason about in terms of low level behavior. How do you grapple with this?
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How do you decide what APIs are async? Shouldn't GPIO be async? For example when I want to control a GPIO expander over a bus, then I'd have to wrap the async bus API into a blocking one? What if the peripheral I'm talking to requires a startup time? Am I blocking there?
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that makes gpio seriously heavyweight, but I get your point. assuming you only have one core than it's more of a low/deterministic latency question than a performance question. a RTFM kind of a kernel seriously mitigate the problem
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What is the consensus since AsyncRead/Write are not finalized? Do you import the traits from another crate?
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On embedded systems with libcore, Read/Write and AsyncRead/Write don't exist, so it kind of sidesteps the question.
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