Aaron Smith wrote: > > On Thu, 24 Jun 1999 20:14:19 CDT, Alfred Perlstein writes: > >I'm not sure what you mean by the refernce to malloc types, I just > >thought something along the lines of mutex_t with an API > >for trying, allocating, freeing and initializing them. > > i'd really like to implement some of the basic solaris primitives: mutex, > cv (condition variable), sema p/v. i sent a message to the smp list on this > at one point but didn't get much of a response other than cranky noises > about "super fine-grained locking isn't worth it". what i'd like to see is > the groundwork laid for finER locking so that we can gradually break up the > points of contention. mutex/cv/sema are intuitive and taught in every OS > course; i don't feel "simple_lock" or "lockmgr" are desirable or adequate. > > i'm willing to work on it, but i can't get to it for at least a couple of > months, so i'm hoping someone else wants to work on it too.
Here's a couple of good research points: uC/OS II by Jean J. Labrosse. This books presents the source for a small, embeddable kernel. It is quite good, and clearly explained. The kernel supports a rich set of threading tools, including sema- phores, mailboxes, and message queues. http://www.ucos-ii.com/ or just buy the book. ;^) eCos, from Cygnus support. A "community source license" embedded OS. I haven't worked with eCos much (yet), but it should be pretty comprehensive. http://www.cygnus.com/ecos/ for more info. RTEMS, a GPL'd embedded kernel. RTEMS was designed for multiprocessor systems from the ground up, and has a rich set of SMP-related tools. Seehttp://www.oarcorp.com/rtems/rtems.html for information and down loads. -- "Where am I, and what am I doing in this handbasket?" Wes Peters Softweyr LLC http://www.softweyr.com/~softweyr w...@softweyr.com To Unsubscribe: send mail to majord...@freebsd.org with "unsubscribe freebsd-hackers" in the body of the message
