C++ named requirements: TimedLockable

 

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C++ named requirements

Basic
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Type properties
ScalarType TriviallyCopyable (C++11) StandardLayoutType (C++11)	PODType TrivialType (C++11) ImplicitLifetimeType (C++20)
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BasicLockable (C++11) Lockable (C++11) TimedLockable (C++11) SharedLockable (C++14) SharedTimedLockable (C++14)	Mutex (C++11) TimedMutex (C++11) SharedMutex (C++17) SharedTimedMutex (C++14)
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CharTraits RegexTraits (C++11) BitmaskType NumericType LiteralType (C++11)	UnaryTypeTrait (C++11) BinaryTypeTrait (C++11) TransformationTrait (C++11) Clock (C++11) TrivialClock (C++11)

 

The TimedLockable requirements describe the characteristics of types that provide timed exclusive blocking semantics for execution agents (threads, processes, tasks).

Requirements

• Lockable

For type L to be TimedLockable, given

• rel_time, a value of a specialization of std::chrono::duration, and
• abs_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	Effects	Return value
m.try_lock_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_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.

Notes

The try_lock_for and try_lock_until member functions obtain a non-shared lock on m on succcess.

See also

• Thread support library
• TimedMutex
• Lockable
• BasicLockable