Re: cvs commit: src/lib/libthread_xu Makefile pthread.map src/lib/libthread_xu/arch Makefile.inc src/lib/libthread_xu/arch/alpha Makefile.inc src/lib/libthread_xu/arch/alpha/alpha pthread_md.c src/lib/libthread_xu/arch/alpha/include pthread_md.h src/lib/libthread_xu/arch/amd64 ...

[Joerg Sonnenberger <joerg@xxxxxxxxxxxxxxxxx>]

On Thu, Feb 03, 2005 at 07:31:51AM +0800, David Xu wrote:
> Linux has exit_group() which I think is used to implement exit().
> FreeBSD introduced thr_exit and kse_exit to exit single thread,
> and leave orignal exit() to exit whole process.

I haven't looked up the semantic of exit_group, but exit() must
terminate the whole program.  If we want to fully support POSIX
signal sematic, we have introduce another exit mechanism to cancel
a part of a thread group.

Concerning the cleanup of code, waitpid (or waittid) seems to be
enough for my reading of the SUS. It should not be a problem to
defer the resource freeing until pthread_detach or pthread_join
is called. If I read the requirements correctly, one or the other
has to be called by the program anyway.

Joerg

> 
> David Xu