[libdispatch-dev] Solaris portability / Pthread workqueue

Stacey Son sson at FreeBSD.org
Thu Nov 19 17:01:52 PST 2009


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:
	http://people.freebsd.org/~sson/thrworkq/

It "mostly" works on amd64/x86_64.   Hopefully, I will have some time over the
upcoming holiday to finish up some of the items I have listed on the TODO list.

-stacey.
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