POSIX semaphore for GNU/Hurd

[Gaël Le Mignot]

Hello,

While trying to compile abiword, and so gnome-vfs, on GNU/Hurd, I've
seen that it uses POSIX semaphore, that we don't implement yet.

So, I've done an implementation of POSIX semaphores using a pthread_mutex
and a pthread_cond. I didn't test it yet, but it compiles, and I'm pretty
confident in it (but I'm sure of the correct behavior of the destroy
function if some threads are locked on the semaphore).

Anyway, here it is. I think it should be merged in libpthreads as soon
as someone reviewed it.

semaphore.c
Description: POSIX semaphore

semaphore.h
Description: POSIX semaphore header

-- 
Gael Le Mignot "Kilobug" - kilobug@freesurf.fr - http://kilobug.free.fr
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