From 2fe8aba6a8a4ce09f353f34881c77f93a9c01ca3 Mon Sep 17 00:00:00 2001
From: rpj <rpj>
Date: Fri, 6 May 2011 02:11:50 +0000
Subject: Robust mutexes merged from devel branch

---
 NEWS | 55 +++++++++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 45 insertions(+), 10 deletions(-)

(limited to 'NEWS')

diff --git a/NEWS b/NEWS
index 5923901..ebc3e4a 100644
--- a/NEWS
+++ b/NEWS
@@ -31,11 +31,6 @@ the full test suite, stress tests and benchmarks.
 
 New Features
 ------------
-Dependence on the winsock library is now discretionary via
-#define RETAIN_WSALASTERROR in config.h. It is undefined by default unless
-WINCE is defined (because I (RJ) am unsure of the dependency there).
-- Ramiro Polla
-
 (MSC and GNU builds) The statically linked library now automatically
 initialises and cleans up on program start/exit, i.e. statically linked
 applications need not call the routines pthread_win32_process_attach_np()
@@ -49,6 +44,19 @@ POSIX TSD (TLS) destructors.
 See README.NONPORTABLE for descriptions of these routines.
 - Ramiro Polla
 
+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
+with some other implementations. This routine returns a 64 bit
+sequence number that is uniquely associated with a thread. It can be
+used by applications to order or hash POSIX thread handles.
+- Ross Johnson
+
 Bug fixes
 ---------
 Many more changes for 64 bit systems.
@@ -75,11 +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.
@@ -89,6 +96,34 @@ Removed all of the POSIX re-entrant function compatibility macros from pthread.h
 Some were simply not semanticly correct.
 - Igor Lubashev
 
+Threads no longer attempt to pass uncaught exceptions out of thread scope (C++
+and SEH builds only). Uncaught exceptions now cause the thread to exit with
+the return code PTHREAD_CANCELED.
+- Ross Johnson
+
+Other changes
+-------------
+Dependence on the winsock library is now discretionary via
+#define RETAIN_WSALASTERROR in config.h. It is undefined by default unless
+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 consumption, in particular use of Win32
+objects.
+- Ross Johnson
+
+New tests
+---------
+robust[1-5].c - Robust mutexes
+sequence1.c - per-thread unique sequence numbers
+
+Modified tests and benchtests
+-----------------------------
+All mutex*.c tests wherever appropriate have been modified to also test
+robust mutexes under the same conditions.
+Added robust mutex benchtests to benchtest*.c wherever appropriate.
+
 
 RELEASE 2.8.0
 -------------
-- 
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