Re: Multi-threading

On 2/21/08, Nathan Rixham <nrixham@gmail.com> wrote: > hope you don't mind me asking for a bit more info, I was always under > the impressions that a thread is defined as (quote wiki) > > "Threads are a way for a program to fork (or split) itself into two or > more simultaneously (or pseudo-simultaneously) running tasks. Threads > and processes differ from one operating system to another but, in > general, a thread is contained inside a process and different threads of > the same process share some resources while different processes do not." > > and php supports pcntl_fork along with signal handlers and interprocess > communication via functions like or stream_socket_pair. > > as such if I set up a cli app with parent and child processes > (?threads), then isn't this multithreading in php? > > I know this strictly isn't the place for such questions, but I hope you > won't mind enlightening me a little on the matter. it is not multithreading. multithreading means that a process starts several "threads" which work simulatenously and share local resources (such as variables, dynamically created functions/classes, database connections, etc.) pcntl_fork creates several processes, which can communicate, but still has their own sets of local resources -- Alexey Zakhlestin http://blog.milkfarmsoft.com/