Re: Re: how do you get to do multiple mysql queries concurrently?

Richard Lynch wrote: >> I think you are mis-remembering, yes. When your fork() call returns, >> you have two separate processes, your child process being an exact >> copy of your parent process. (mostly, see "copy-on-write"). The only >> thing they share at this point are open file descriptors which have >> also been copied, so they obviously point the the same file(s). > > So they could easily corrupt the file by making assumptions about it. Actually only if they make incorrect assumptions :-) > More importantly, if you build and initialize some data structures > before you fork, and if they each assume they have exclusive access to > said data structures, your program ends up not being "thread-safe" I'm sorry, you're wrong. You don't seem to quite understand what fork() does. After the fork(), both processes will each have a copy of those data structures, and they can both do whatever they like to them without interfering with each other. Anyway, enough of this. I'm done. /Per Jessen, Zürich