On Nov 19, 2009, at 5:51 PM, Prakash Sangappa wrote:

I am interested in finding out more about the pthread workqueue
API that libdispatch uses. Is there any documentation / man pages
available?

Hi,

I have spending some quality time with the pthread workqueue API and

all the documentation I could find was the source code (see pointers to

source below). I suspect that there might be some internal apple docs

given that a little dtracing reports that this API is very popular with darwin

apps.

Kernel bits:

http://fxr.watson.org/fxr/source/bsd/kern/pthread_synch.c?v=xnu-1456.1.26

Pthread bits:

http://www.opensource.apple.com/source/Libc/Libc-583/pthreads/pthread.c

Search for:

	- pthread_workqueue_init_np()
	- pthread_workqueue_create_np()
	- pthread_workqueue_additem_np()
	- pthread_workqueue_attr_init_np()
	- pthread_workqueue_attr_destroy_np()
	- pthread_workqueue_attr_setqueuepriority_np()
	- pthread_workqueue_attr_getovercommit_np()
	- pthread_workqueue_attr_setovercommit_np()
	- pthread_workqueue_requestconcurrency_np()
	- pthread_workqueue_getovercommit_np()

Also, I have a preliminary implementation of the pthread workqueue API for FreeBSD at: