| Commit message (Collapse) | Author | Age |
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This makes the operations that work on headers start with
nni_msg_header or nng_msg_header. It also renames _trunc to
_chop (same strlen as _trim), and renames prepend to insert.
We add a shorthand for clearing message content, and make
better use of the endian safe 32-bit accessors too.
This also fixes a bug in inserting large headers into messages.
A test suite for message handling is included.
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This passes valgrind 100% clean for both helgrind and deep leak
checks. This represents a complete rethink of how the AIOs work,
and much simpler synchronization; the provider API is a bit simpler
to boot, as a number of failure modes have been simply eliminated.
While here a few other minor bugs were squashed.
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We have seen leaks of pipes causing test failures (e.g. the Windows
IPC test) due to EADDRINUSE. This was caused by a case where we
failed to pass the pipe up because the AIO had already been canceled,
and we didn't realize that we had oprhaned the pipe. The fix is to
add a return value to nni_aio_finish, and verify that we did finish
properly, or if we did not then we must free the pipe ourself. (The
zero return from nni_aio_finish indicates that it accepts ownership
of resources passed via the aio.)
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Most of the races around close were probably here - the cancellation was
not getting through on endpoint close, which meant that we could actually
toss endpoints while they were in use.
We need to fix the timeouts stuff -- especially for reconnects etc, but
we are just about ready for this stuff to be reintegrated into master.
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It turns out that I had to fix a number of subtle asynchronous
handling bugs, but now TCP is fully asynchronous. We need to
change the high-level dial and listen interfaces to be async
as well.
Some of the transport APIs have changed here, and I've elected
to change what we expose to consumers as endpoints into seperate
dialers and listeners. Under the hood they are the same, but
it turns out that its helpful to know the intended use of the
endpoint at initialization time.
Scalability still occasionally hangs on Linux. Investigation
pending.
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Transport-level pipe initialization is now sepearate and explicit.
The POSIX send/recv logic still uses threads under the hood, but
makes use of the AIO framework for send/recv. This is a key stepping
stone towards enabling poll() or similar async I/O approaches.
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The CMSG handling was completely borked. This is fixed now, and
we stash the SP header size (ugh) in the CMSG contents to match what
nanomsg does. We now pass the cmsg validation test.
We also fixed handling of certain endpoint-related options, so that
endpoints can get options from the socket at initialization time.
This required a minor change to the transport API for endpoints.
Finally, we fixed a critical fault in the REP handling of RAW sockets,
which caused them to always return NNG_ESTATE in all cases. It should
now honor the actual socket option.
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The use of a single function to get both size and length actually
turned out to be awkward to use; better to have separate functions
to get each. While here, disable some of the initialization/fork
checks, because it turns out they aren't needed.
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This uncovered a few problems - inproc was not moving the headers
to the body on transmit, and the message chunk allocator had a serious
bug leading to memory corruption. I've also added a message dumper,
which turns out to be incredibly useful during debugging.
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At this point listening and dialing operations appear to function properly.
As part of this I had to break the close logic up since otherwise we had a
loop trying to reap a thread from itself. So there is now a separate reaper
thread for pipes per-socket. I also changed lists to be a bit more rigid,
and allocations now zero memory initially. (We had bugs due to uninitialized
memory, and rather than hunt them all down, lets just init them to sane zero
values.)
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This was done as these entry points are more clearly associated with
single function transport routines like those from BSD sockets, unlike
our higher level dial() and listen() APIs that do accept() or reconnect
in loops.
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code with uncrustify. (Minor adjustments.) No more arguments!
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trying to come to a fork-safe solution, but ultimately we gave up.
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