C++ named requirements: SharedTimedLockable (since C++14)

 

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C++ named requirements

Basic
DefaultConstructible CopyAssignable	CopyConstructible MoveAssignable (C++11)	MoveConstructible (C++11) Destructible
Type properties
ScalarType TriviallyCopyable (C++11)	StandardLayoutType (C++11) PODType	TrivialType (C++11) ImplicitLifetimeType
Library-Wide
EqualityComparable LessThanComparable Swappable ValueSwappable (C++11)	NullablePointer (C++11) Hash (C++11) Allocator FunctionObject	Callable Predicate BinaryPredicate Compare
Container
Container SequenceContainer ContiguousContainer (C++17)	ReversibleContainer AssociativeContainer AllocatorAwareContainer	UnorderedAssociativeContainer (C++11)
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DefaultInsertable (C++11) CopyInsertable (C++11)	MoveInsertable (C++11) EmplaceConstructible (C++11)	Erasable (C++11)
Iterator
LegacyIterator LegacyOutputIterator LegacyInputIterator	LegacyForwardIterator LegacyBidirectionalIterator LegacyRandomAccessIterator	LegacyContiguousIterator (C++17) ConstexprIterator (C++20)
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FormattedInputFunction UnformattedInputFunction	FormattedOutputFunction	UnformattedOutputFunction
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BasicFormatter (C++20)	Formatter (C++20)
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SeedSequence (C++11) RandomNumberEngine (C++11)	RandomNumberDistribution (C++11) UniformRandomBitGenerator (C++11)	RandomNumberEngineAdaptor (C++11)
Concurrency
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)
Ranges
RangeAdaptorObject (C++20)	RangeAdaptorClosureObject (C++20)
Other
CharTraits RegexTraits (C++11) BitmaskType LiteralType (C++11)	NumericType UnaryTypeTrait (C++11) BinaryTypeTrait (C++11) TransformationTrait (C++11)	Clock (C++11) TrivialClock (C++11)

 

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

Requirements

• SharedLockable

For type L to be SharedTimedLockable, 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	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.

Notes

The try_lock_shared_for and try_lock_shared_until member functions obtain a shared lock on m on succcess.

See also

• Thread support library
• SharedTimedMutex
• SharedLockable