Keeping ANNOUNCE up to date with code additions and fixes.

1 files changed, 10 insertions, 6 deletions

diff --git a/ANNOUNCE b/ANNOUNCE
index bf9d431..9f269a4 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -27,10 +27,9 @@ Changes since the last snapshot
 -------------------------------

 

 ----------------------------------

-New: Spin locks (alpha level code)

+New: Spin locks (beta level code)

 ----------------------------------

-These are part of POSIX 1003.1j. They are

-useful only on multiprocessor machines.

+These are part of POSIX 1003.1j.

 

         #define _POSIX_SPIN_LOCKS

         pthread_spin_init()

@@ -38,12 +37,16 @@ useful only on multiprocessor machines.
         pthread_spin_lock()

         pthread_spin_unlock()

         pthread_spin_trylock()

+        #define PTHREAD_SPINLOCK_INITIALIZER

+

+Spin_lock spins (busy-waits) if more than one processor is available

+to the process, othewise it is equivalent to a POSIX_MUTEX_DEFAULT.

+The spinlock routines do minimal error checking.

 

 --------------------------------

-New: Barriers (alpha level code)

+New: Barriers (beta level code)

 --------------------------------

-These are part of POSIX 1003.1j. They are generally

-useful.

+These are part of POSIX 1003.1j.

 

         #define _POSIX_BARRIERS

         pthread_barrier_init()

@@ -62,6 +65,7 @@ auto-initialiser initialisation fails.
 

 _POSIX_READER_WRITER_LOCKS is now defined.

 

+pthread_rwlock_wrlock() was inadvertantly a cancelation point.

 

 ---------------------------

 Known bugs in this snapshot