send() function just copy the data to the send buffer of this socket.
when send() returns a positive number, it does not means the data was
really send to the network. Generally, if the send buffer is empty or
your data is less than the space of send buffer, send() will always
return success. In my code, i always try send() first, and watch
EV_WRITE after the send() returns an EAGAIN error.
于 2011年11月07日 17:11, 钱晓明 写道:
Thanks for the reply! I just read the source code of Redis, which has
a IO event mechanism similar to libev. I find that it install write
event when there is data to send back and remove it after all data
sent. In callback function, Redis only send a fixed number of bytes to
client if the reply data is too long, then return from this function
without deleting write event. I think this is situation C.
2011-11-07
------------------------------------------------------------------------
Kyle Qian
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