Critique my simple thread pool

Learning parallel programing and pthreads so I tried my hand at writing a thread pool.

http://pastebin.com/ebrVWFa8

If it ain't Lisp, it's crap.

Lisp is shit.

Rewriting slist from scratch

Typical C program.

Disregarding that, have you tried feeding it to helgrind?

Using shit++

Typical shit programmer

One argument is not enough; you should create a mechanism that will allow the user to supply multiple arguments, which will in turn be converted into a struct, which will be stored as void *arg in task.

>>1
That's nice and all, but you're reinventing the wheel.

Just use libdispatch.

If you're on OSX or FreeBSD you're already set. With a Debian based OS, including Ubuntu and Linux Mint, just: $ sudo apt-get install libdispatch-dev.

Fedora is also getting it in the next major release.

It works most of the time. But I'm trying to write a simple threaded quicksort using it and for some reason it's only executing the first task I dispatch.

>>4
I still have a data race when killing it but it's simple to fix.

>>6
How would I define variable field structs dynamically? Is it even possible to define types at runtime?

>>7
Wrote this for class and teach won't let us use external libraries.