| Commit message (Collapse) | Author | Age |
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fixes #38 Make protocols "pluggable", or at least optional
This is a breaking change, as we've done away with the central
registered list of protocols, and instead demand the user call
nng_xxx_open() where xxx is a protocol name. (We did keep a
table around in the compat framework though.)
There is a nice way for protocols to plug in via
an nni_proto_open(), where they can use a generic constructor
that they use to build a protocol specific constructor (passing
their ops vector in.)
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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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PUSH attempts to do a round-robin based distribution. However, I
noticed that there is a bug in REQ, because REQ sockets will continue
to pull down work until the first one no longer has room. This can
in theory lead to scheduliung imbalances when the load is very light.
(Under heavy load, the backpressure dominates.)
Also, I note that mangos suffers the same problem. It does not
make any attempt to deliver work equally, basically each pipe winds
up pulling messages until its own buffers are full. This is bad.
We can borrow the logic here for both REQ and mangos.
None of this is tested yet.
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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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code with uncrustify. (Minor adjustments.) No more arguments!
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