C++ concepts: TimedMutex
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The TimedMutex concept extends the TimedLockable concept to include inter-thread synchronization.
[edit] Requirements
Additionally, for object m of TimedMutex type.
- The expression m.try_lock_for(duration) has the following properties
- Behaves as an atomic operation.
- Attempts to obtain exclusive ownership of the mutex within the duration specified by
duration. Ifdurationis less or equalduration.zero(), attempts to obtain the ownership without locking (as if bytry_lock()). Otherwise, this function blocks until the mutex is acquired or until the time specified bydurationpasses. It returns withindurationonly if it succeeds, but it allowed to fail to acquire the mutex even if at some point in time duringdurationit was not owned by another thread. In any case, it returns true if the mutex was acquired and false otherwise. - If
try_lock_for(duration)succeeds, priorunlock()operations on the same object synchronize-with this operation (equivalent to release-acquire std::memory_order). - The behavior is undefined if the calling thread already owns the mutex (except if m is std::recursive_timed_mutex)
- The expression m.try_lock_until(time_point) has the following properties
- Behaves as an atomic operation.
- Attempts to obtain exclusive ownership of the mutex within the time left until
time_point. Iftime_pointalready passed, attempts to obtain the ownership without locking (as if bytry_lock()). Otherwise, this function blocks until the mutex is acquired or until the time specified bytime_pointpasses. It returns beforetime_pointonly if it succeeds, but it allowed to fail to acquire the mutex even if at some point in time beforetime_pointit was not owned by another thread. In any case, it returns true if the mutex was acquired and false otherwise. - If
try_lock_until(time_point)succeeds, priorunlock()operations on the same object synchronize-with this operation (equivalent to release-acquire std::memory_order). - The behavior is undefined if the calling thread already owns the mutex (except if m is std::recursive_timed_mutex)
[edit] Library types
The following standard library types satisfy TimedMutex: