[patch] Fix shared_timed_mutex::try_lock_until() et al

[Jonathan Wakely]

On 08/04/15 20:11 +0100, Jonathan Wakely wrote:
>diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
>index 5871716..39d6866 100644
>--- a/libstdc++-v3/ChangeLog
>+++ b/libstdc++-v3/ChangeLog
>@@ -2,7 +2,8 @@
>
> 	* include/std/shared_mutex (shared_timed_mutex): Add comments to
> 	explain the logic.
>-	(_M_n_readers): Rename to _S_n_readers.
>+	(_Mutex): Remove redundant type.
>+	(_M_n_readers): Rename to _S_max_readers.
> 	(_M_write_entered, _M_readers): New convenience functions.
> 	(lock, lock_shared, try_lock_shared, unlock_shared): Use convenience
> 	functions. Use predicates with condition variables. Simplify bitwise
>@@ -11,7 +12,8 @@
> 	and call try_lock_until or try_shared_lock_until respectively.
> 	(try_lock_until, try_shared_lock_until): Wait on the condition
> 	variables until the specified time passes.
>-	(unlock, unlock_shared): Add Debug Mode assertions.
>+	(unlock): Add Debug Mode assertion.
>+	(unlock_shared): Add Debug Mode assertion.
> 	* testsuite/30_threads/shared_timed_mutex/try_lock/3.cc: New.

This has been committed to trunk and 4.9 (because on the 4.9 branch we
only had the non-pthread_rwlock_t version with broken timed lock
functions).