6bd922fce8
Passing the number of sent bytes to the callback is superfluous; datagram sockets operate in atomic mode: either the sendmsg() system call succeeds or it fails but it never does partial writes. Instead, report send errors to the callback. UDP error reporting is fairly haphazard on most platforms. You should not expect reliable delivery of anything besides EMSGSIZE and (possibly) ENETDOWN and ENETUNREACH. Fixes #2608.
Evented I/O for V8 javascript. 
To build:
Prerequisites (Unix only):
* GCC 4.2 or newer
* Python 2.6 or 2.7
* GNU Make 3.81 or newer
* libexecinfo (FreeBSD and OpenBSD only)
Unix/Macintosh:
./configure
make
make install
If your python binary is in a non-standard location or has a non-standard name, run the following instead:
export PYTHON=/path/to/python
$PYTHON ./configure
make
make install
Windows:
vcbuild.bat
To run the tests:
Unix/Macintosh:
make test
Windows:
vcbuild.bat test
To build the documentation:
make doc
To read the documentation:
man doc/node.1