id summary reporter owner description type status milestone component version severity resolution keywords cc 7592 Add a null_mutex that is a no-op and that is a model of UpgardeLockable viboes viboes "Sometimes we are sure that a class that is parameterized with a Lockable is used on a single-thread environment. A null_mutex as the one in Boost.Interprocess that follows the Boost.Thread concept UpgradeLockable will help in this case." Feature Requests closed Boost 1.53.0 thread Boost 1.52.0 Not Applicable fixed