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Diffstat (limited to 'libstdc++-v3/ChangeLog')
| -rw-r--r-- | libstdc++-v3/ChangeLog | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog index 24a4a35..d39a06f 100644 --- a/libstdc++-v3/ChangeLog +++ b/libstdc++-v3/ChangeLog @@ -1,5 +1,22 @@ 2019-12-02 Mike Crowe <mac@mcrowe.com> + PR libstdc++/78237 Add full steady_clock support to timed_mutex + * acinclude.m4 (GLIBCXX_CHECK_PTHREAD_MUTEX_CLOCKLOCK): Define to + detect presence of pthread_mutex_clocklock function. + * config.h.in: Regenerate. + * configure: Regenerate. + * configure.ac: Call GLIBCXX_CHECK_PTHREAD_MUTEX_CLOCKLOCK. + * include/std/mutex (__timed_mutex_impl): Remove unnecessary __clock_t. + (__timed_mutex_impl::_M_try_lock_for): Use best clock to turn relative + timeout into absolute timeout. + (__timed_mutex_impl::_M_try_lock_until): Keep existing implementation + for system_clock. Add new implementation for steady_clock that calls + _M_clocklock. Modify overload for user-defined clock to use a relative + wait so that it automatically uses the best clock. + [_GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK] (timed_mutex::_M_clocklock): + New member function. + (recursive_timed_mutex::_M_clocklock): Likewise. + * testsuite/30_threads/recursive_timed_mutex/try_lock_until/3.cc: New test. Ensure that timed_mutex::try_lock_until actually times out after the specified time when using both system_clock and |