> -----Original Message----- > From: [EMAIL PROTECTED] > Sent: Thu, 15 Mar 2007 11:15:54 -0600 > To: [EMAIL PROTECTED] > Subject: Re: question on select & FD_ISSET > > Junior <[EMAIL PROTECTED]> wrote: >> True, but it seems to me that if I FD_SET them at the top of the loop >> without FD_CLR first, I will be expanding the set unnecessarily which >> would waste memory (eventually run out). >> Since FD_SET adds the set and FD_CLR clears it from the list, FD_SET >> without FD_CLR would duplicate fds in the set. Not so? > > It's good that you look out for memory leaks, but in this case there's > nothing to worry about. > > fd_set is a fixed-size array of bits, indexed by the file descriptor > number. FD_SET and FD_CLR just modify the fd's bit in that array. > > It's so simple that it can't leak memory. After you've created an > fd_set, > its size never changes. > > You can see its defition in /usr/include/sys/select.h. >
Thanks much for claering this up. Most appreciated. --Jr. ____________________________________________________________ FREE 3D EARTH SCREENSAVER - Watch the Earth right on your desktop! Check it out at http://www.inbox.com/earth
