[Q] efficient or good model for send/receive with streams scheduled in runloop?
[Q] efficient or good model for send/receive with streams scheduled in runloop?
- Subject: [Q] efficient or good model for send/receive with streams scheduled in runloop?
- From: JongAm Park <email@hidden>
- Date: Tue, 27 Jan 2009 08:33:07 -0800
Hello,
I would like to write a network program which is scheduled in runloop.
According to "Stream Programming Guide for Cocoa", there are two
scheduling, one is polling, and the other is run-loop scheduling.
Because I don't want it to block things, the run-loop scheduling would
be a nice an convenient way to go.
( Probably using thread with polling or signaling is more flexible.
Actually it looks like that the run-loop scheduling is implemented with
thread and signaling. )
With run-loop scheduling, it is very handy to send data to others only
when there is space in a buffer, and receive only when there are data in
a buffer. ( NSStreamEventHasSpaceAvailable and
NSStreamEventHasBytesAvailable )
However, I have difficulty in making it to send data and receive ack
from a server.
Sometimes, it receives some meaningful data about changed information
from a server, if a client send a request to change some data.
But sometimes it also receives ack.
So, I would like to make it do next job after receiving an ack.
So, I embraced a send routine with a lock. But the whole client process
is in dead-lock status, because it is not multi-threaded.
( a receive routine already locked. )
Under this situation, is there a good network programming model or
pattern? How should I solve this issue?
Thank you.
JongAm Park
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