C++ named requirements: SharedTimedLockable (since C++14) (original) (raw)
The SharedTimedLockable requirements describe the characteristics of types that provide timed shared blocking semantics for execution agents (threads, processes, tasks).
[edit] Requirements
For type **L** to be SharedTimedLockable, given
rel_time, a value of a specialization of std::chrono::duration, andabs_time, a value of a specialization of std::chrono::time_point,
the following conditions have to be satisfied for an object **m** of type **L**:
| Expression | Requires | Return value |
|---|---|---|
| m.try_lock_shared_for(rel_time) | Blocks for the provided duration rel_time or until a lock on m is acquired. | true if the lock was acquired, false otherwise. |
| m.try_lock_shared_until(abs_time) | Blocks until the provided time point abs_time is reached or a lock on m is acquired. | true if the lock was acquired, false otherwise. |
[edit] Notes
The try_lock_shared_for and try_lock_shared_until member functions obtain a shared lock on m on success.
[edit] Standard library
The following standard library types satisfy SharedTimedLockable requirements:
| | provides shared mutual exclusion facility and implements locking with a timeout (class) [edit] | | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |