| Commit message (Collapse) | Author | Age |
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We need to remember that protocol stops can run synchronously, and
therefore we need to wait for the aio to complete. Further, we need
to break apart shutting down aio activity from deallocation, as we need
to shut down *all* async activity before deallocating *anything*.
Noticed that we had a pipe race in the surveyor pattern too.
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This one is caused by us deallocating the msg queue before we
stop all asynchronous I/O operations; consequently we can wind
up with a thread trying to access a msg queue after it has been
destroyed.
A lesson here is that nni_aio_fini() needs to be treated much like
nni_thr_fini() - you should do this *before* deallocating anything
that callback functions might be referencing.
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This should address some of the errors we've seen. Additionally,
the scalability test was a bit brittle due to too-short timeouts.
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This does a few things. First it closes some preexisting leaks.
Second it tightens the overall close logic so that we automatically
discard idhash resources (while keeping numeric values for next id
etc. around) when the last socket is closed. This then eliminates
the need for applications to ever explicitly terminate resources.
It turns out platform-specific resources established at nni_init()
time might still be leaked, but it's also the case that we now no
longer dynamically allocate anything at platform initialization time.
(This presumes that the platform doesn't do so under the hood when
creating critical sections or mutexes for example.)
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This compiles correctly, but doesn't actually deliver events yet.
As part of this, I've made most of the initializables in nng
safe to tear-down if uninitialized (or set to zero e.g. via calloc).
This makes it loads easier to write the teardown on error code, since
I can deinit everything, without worrying about which things have been
initialized and which have not.
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As part of this, we've added a way to unblock callers in a message
queue with an error, even without a signal channel. This was necessary
to interrupt blockers upon survey timeout. They will get NNG_ETIMEDOUT,
but afterwards callers get NNG_ESTATE.
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Platforms must seed the pRNGs by offering an nni_plat_seed_prng()
routine. Implementations for POSIX using various options (including
the /dev/urandom device) are supplied.
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This adds the surveyor protocol, and updates the respondent somewhat.
I've switched to using generic names for per-pipe and per-socket protocol
data. Hopefully this will make 'cut-n-paste' from other protocol
implementations easier.
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This should eliminate all need for protocols to do their own
thread management tasks.
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