[asterisk-dev] ast_mutex_lock

[Tilghman Lesher]

On Monday 23 October 2006 02:26, Alexandr Olekhnovich wrote:
> Hello all,
> I'm developing a billing module for asterisk and I've
> to use connection pooling. But it doesn't work as well as I need. So
> I am under apprehension of 2 functions. They are ast_mutex_lock,
> ast_mutex_unlock.
> I know partly what they are for. But can anybody explain what they
> are really for and where can I use them? Thanx.

They are usually just defines for pthread_mutex_lock and
pthread_mutex_unlock, unless you are debugging, in which case they
are wrappers for the above functions, with extra debugging code.

They need to be used in any place where you might have two different
threads applying changes to the same block of memory, in order to avoid
race conditions.

-- 
Tilghman