cvs commit: src/lib/libpthread/thread thr_create.cthr_private.h thr_rwlock.c

[Daniel Eischen]

On Thu, 8 Jan 2004, Daniel Eischen wrote:

> deischen    2004/01/08 07:37:09 PST
> 
>   FreeBSD src repository
> 
>   Modified files:
>     lib/libpthread/thread thr_create.c thr_private.h thr_rwlock.c 
>   Log:
>   Add a simple work-around for deadlocking on recursive read locks
>   on a rwlock while there are writers waiting.  We normally favor
>   writers but when a reader already has at least one other read lock,
>   we favor the reader.  We don't track all the rwlocks owned by a
>   thread, nor all the threads that own a rwlock -- we just keep
>   a count of all the read locks owned by a thread.

Reviewed by:	davidxu