Hi Min,
Basically, there is only one thread. Function inlining is independent of
threads. Even without function inlining, when one function calls another
function it is still the same thread. Interrupt handlers on the other
hand get called asynchronously (as the result of an external event, for
instace) and they execute in a somewhat special environment. As the name
implys, they interrupt the execution of the main thread. For this
reason, if an interrupt handler accesses a shared variable, access to
that variable should be protected (with atomic statemens).
Cheers,
Urs
Min Guo schrieb:
Does TinyOS use multipule threads or not? I see the following sentences in
the programming manuel:
[..]
Does that mean there is only one thread in every application? When a
function A calles function B, will A
just inline the codes of B at the calling point? However, if so why do we
need to consider about the preemptive
things - since there is only one thread, where do the interupts come from?
Kind regards,
Min
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