Programming

hi

i have a server socket programme which is running in HP/UX system and
then need to add a function about refreshing memory every miniute

because the socket programme is blocked , i have no idea about this

what should i do
thanks

I'm not too sure what you mean by refresh memory, but am guessing that the problem is that you need to incorporate a new function in your code, and it has to run every minute, but can't because at that point, your program is blocked in an accept call.

Maybe you could setup a signal handling function for SIGALRM, and just run alarm(60) (for one minute) before the accept. Then in your handling function, you can reset the signal handler (am assuming use of 'signal' function here), refresh your memory (or whatever), then run alarm(60) again.

Of course, it is easier said than done, but you could give it a go.

this solution is only at the cost of an extra process and an additional load to the cpu...

fork a process to monitor - or look into memory refresh.. (close all the unnnecessary descriptors ..they are not needed )
while the other process can have a block at accept function call..

blowtorch .. in newer semantics of signals - reregistration of signals are not needed if we are enabling RESTART flag in the sigaction specification itself...

I know that, just that I haven't used sigaction enough to go recommend it to anyone... I don't write too many major C programs, the ones I do, usually put in the 'signal' system call to handle signals, cause its quick (though dirty).

torch,

i didnt have any strings attached with my message (reg sigaction) ... it was just a thought to use the newer semantics ...

Hi benbenpig,

In my opinion you can do refresh after each blocking call, not every minute. Enough that will do. Isn't it so ?

Regards.

thanks ,i think this is the solution i need