diff options
Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 26 |
1 files changed, 10 insertions, 16 deletions
@@ -44,16 +44,11 @@ POSIX TSD (TLS) destructors. See README.NONPORTABLE for descriptions of these routines. - Ramiro Polla -Robust mutexes are implemented within the PROCESS_PRIVATE scope. Robust -mutexes are mandatory (SUSv3 2008) for implementations that support -PSHARED objects and discretionary for those that don't. We still don't -have PSHARED support but wanted to be source code compatible and they -will hopefully nevertheless be useful for some applications. NOTE that -pthread_mutex_*() functions may return different values for robust -mutexes than they otherwise do in normal usage, e.g. -pthread_mutex_unlock() is required to check ownership for all mutex -types when the mutex is robust, whereas this does not occur for the -"normal" non-robust mutex type. +Robust mutexes are implemented within the PROCESS_PRIVATE scope. NOTE that +pthread_mutex_* functions may return different error codes for robust +mutexes than they otherwise do in normal usage, e.g. pthread_mutex_unlock +is required to check ownership for all mutex types when the mutex is +robust, whereas this does not occur for the "normal" non-robust mutex type. - Ross Johnson pthread_getunique_np is implemented for source level compatibility @@ -88,11 +83,10 @@ Removed potential NULL pointer reference. - Robert Kindred Removed the requirement that applications restrict the number of threads -calling pthread_barrier_wait() [on the same barrier] to just the barrier -count in order to avoid contention and dead lock. Also reduced the -contention between barrier_wait and barrier_destroy. This change will -have slowed barriers down slightly but halves the number of semaphores -consumed per barrier to one. +calling pthread_barrier_wait to just the barrier count. Also reduced the +contention between barrier_wait and barrier_destroy. This change will have +slowed barriers down slightly but halves the number of semaphores consumed +per barrier to one. - Ross Johnson Fixed a handle leak in sched_[gs]etscheduler. @@ -115,7 +109,7 @@ WINCE is defined (because RJ is unsure of the dependency there). - Ramiro Polla Several static POSIX mutexes used for internal management were replaced by -MCS queue-based locks to reduce resource overheads, particularly Win32 +MCS queue-based locks to reduce resource consumption, in particular use of Win32 objects. - Ross Johnson |