CVS commit: src/lib/libpthread

[Andrew Doran <ad%netbsd.org@localhost>]

Module Name:    src
Committed By:   ad
Date:           Fri Sep 21 16:21:54 UTC 2007

Modified Files:
        src/lib/libpthread: pthread_rwlock2.c

Log Message:
pthread_rwlock_unlock

- Allow callers to try and release an unheld rwlock. Just return EPERM
  as mandated by IEEE Std 1003.1.
- Use pthread__atomic_swap_ptr() to set in the new lock value. At this
  point the lock word can't have changed.

pthread__rwlock_wrlock, pthread__rwlock_rdlock:

- Mask out the waiter bits in the lock word before checking to see if
  the current thread is about to lock against itself.


To generate a diff of this commit:
cvs rdiff -r1.3 -r1.4 src/lib/libpthread/pthread_rwlock2.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.