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| author | Ulrich Drepper <drepper@redhat.com> | 2001-05-24 07:25:43 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2001-05-24 07:25:43 +0000 |
| commit | 9c4a51972f5de318f3786938949b8320a385fef1 (patch) | |
| tree | 54cb92794d8a11e75a11114b4acacc2532e75109 /linuxthreads/ChangeLog | |
| parent | 64b7897d6d453e67afe3f9d81c8fc37c26f8d483 (diff) | |
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Update.
2001-05-01 Kaz Kylheku <kaz@ashi.footprints.net>
Memory barrier overhaul following line by line inspection.
* mutex.c (pthread_once): Missing memory barriers added.
* pthread.c (__pthread_wait_for_restart_signal,
__pthread_timedsuspend_new, __pthread_restart_new): Added
memory barriers ``just in case'' and for documentary value.
* spinlock.c (__pthread_release): New inline function for releasing
spinlock, to complement __pthread_acquire. Includes memory
barrier prior to assignment to spinlock, and __asm __volatile
dance to prevent reordering or optimization of the spinlock access.
* spinlock.c (__pthread_unlock, __pthread_alt_lock,
__pthread_alt_timedlock, __pthread_alt_unlock,
__pthread_compare_and_swap): Updated to use new __pthread_release
instead of updating spinlock directly.
* spinlock.c (__pthread_lock, __pthread_unlock, wait_node_alloc,
wait_node_free, wait_node_dequeue, __pthread_alt_lock,
__pthread_alt_timedlock, __pthread_alt_unlock, __pthread_acquire):
Memory barrier overhaul. Lots of missing memory barriers added,
a couple needless ones removed.
* spinlock.c (__pthread_compare_and_swap): testandset optimization
removed, just calls __pthread_acquire, which has the new read
barrier in it before its testandset.
Diffstat (limited to 'linuxthreads/ChangeLog')
| -rw-r--r-- | linuxthreads/ChangeLog | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/linuxthreads/ChangeLog b/linuxthreads/ChangeLog index f10ad91531..05ffaab5da 100644 --- a/linuxthreads/ChangeLog +++ b/linuxthreads/ChangeLog @@ -1,3 +1,27 @@ +2001-05-01 Kaz Kylheku <kaz@ashi.footprints.net> + + Memory barrier overhaul following line by line inspection. + * mutex.c (pthread_once): Missing memory barriers added. + * pthread.c (__pthread_wait_for_restart_signal, + __pthread_timedsuspend_new, __pthread_restart_new): Added + memory barriers ``just in case'' and for documentary value. + * spinlock.c (__pthread_release): New inline function for releasing + spinlock, to complement __pthread_acquire. Includes memory + barrier prior to assignment to spinlock, and __asm __volatile + dance to prevent reordering or optimization of the spinlock access. + * spinlock.c (__pthread_unlock, __pthread_alt_lock, + __pthread_alt_timedlock, __pthread_alt_unlock, + __pthread_compare_and_swap): Updated to use new __pthread_release + instead of updating spinlock directly. + * spinlock.c (__pthread_lock, __pthread_unlock, wait_node_alloc, + wait_node_free, wait_node_dequeue, __pthread_alt_lock, + __pthread_alt_timedlock, __pthread_alt_unlock, __pthread_acquire): + Memory barrier overhaul. Lots of missing memory barriers added, + a couple needless ones removed. + * spinlock.c (__pthread_compare_and_swap): testandset optimization + removed, just calls __pthread_acquire, which has the new read + barrier in it before its testandset. + 2001-05-20 Roland McGrath <roland@frob.com> * Makeconfig: New file, variables used to be in main libc Makeconfig. |