cache::LruSet< T, Hash, Equal > Class Template Reference

#include <userver/cache/lru_set.hpp>

Detailed Description

template<typename T, typename Hash = std::hash<impl::StringToStringView<T>>, typename Equal = std::equal_to<impl::StringToStringView<T>>>
class cache::LruSet< T, Hash, Equal >

LRU set, thread safety matches Standard Library thread safety

Definition at line 19 of file lru_set.hpp.

Public Member Functions
	LruSet (size_t max_size, const Hash &hash=Hash(), const Equal &equal=Equal())
	LruSet (LruSet &&lru) noexcept=default
	LruSet (const LruSet &lru)=delete
LruSet &	operator= (LruSet &&lru) noexcept=default
LruSet &	operator= (const LruSet &lru)=delete
bool	Put (const T &key)
void	Erase (const T &key)
	Removes key from LRU.
bool	Has (const T &key)
	Checks whether the key in LRU and updates its usage.
void	SetMaxSize (size_t new_max_size)
	Sets the max size of the LRU, truncates values if new_max_size < GetSize()
void	Invalidate ()
	Removes all the elements.
template<typename Function>
void	VisitAll (Function &&func) const
	Call Function(const T&) for all items.
size_t	GetSize () const
const T *	GetLeastUsed ()

Constructor & Destructor Documentation

LruSet()

template<typename T, typename Hash = std::hash<impl::StringToStringView<T>>, typename Equal = std::equal_to<impl::StringToStringView<T>>>

cache::LruSet< T, Hash, Equal >::LruSet ( size_t max_size, const Hash & hash = Hash(), const Equal & equal = Equal() )

inlineexplicit

Definition at line 21 of file lru_set.hpp.

Member Function Documentation

Erase()

template<typename T, typename Hash = std::hash<impl::StringToStringView<T>>, typename Equal = std::equal_to<impl::StringToStringView<T>>>

void cache::LruSet< T, Hash, Equal >::Erase ( const T & key )

inline

Removes key from LRU.

Definition at line 34 of file lru_set.hpp.

GetLeastUsed()

template<typename T, typename Hash = std::hash<impl::StringToStringView<T>>, typename Equal = std::equal_to<impl::StringToStringView<T>>>

const T * cache::LruSet< T, Hash, Equal >::GetLeastUsed ( )

inline

Returns pointer to the least recently used element or nullptr if LruSet is empty.

Warning

Returned pointer may be freed on the next set access!

Definition at line 56 of file lru_set.hpp.

GetSize()

template<typename T, typename Hash = std::hash<impl::StringToStringView<T>>, typename Equal = std::equal_to<impl::StringToStringView<T>>>

size_t cache::LruSet< T, Hash, Equal >::GetSize ( ) const

inline

Definition at line 51 of file lru_set.hpp.

Has()

template<typename T, typename Hash = std::hash<impl::StringToStringView<T>>, typename Equal = std::equal_to<impl::StringToStringView<T>>>

bool cache::LruSet< T, Hash, Equal >::Has ( const T & key )

inline

Checks whether the key in LRU and updates its usage.

Definition at line 37 of file lru_set.hpp.

Invalidate()

template<typename T, typename Hash = std::hash<impl::StringToStringView<T>>, typename Equal = std::equal_to<impl::StringToStringView<T>>>

void cache::LruSet< T, Hash, Equal >::Invalidate ( )

inline

Removes all the elements.

Definition at line 43 of file lru_set.hpp.

Put()

template<typename T, typename Hash = std::hash<impl::StringToStringView<T>>, typename Equal = std::equal_to<impl::StringToStringView<T>>>

bool cache::LruSet< T, Hash, Equal >::Put ( const T & key )

inline

Adds key to the LRU or updates its usage

Returns

true if key is a new one

Definition at line 31 of file lru_set.hpp.

SetMaxSize()

template<typename T, typename Hash = std::hash<impl::StringToStringView<T>>, typename Equal = std::equal_to<impl::StringToStringView<T>>>

void cache::LruSet< T, Hash, Equal >::SetMaxSize ( size_t new_max_size )

inline

Sets the max size of the LRU, truncates values if new_max_size < GetSize()

Definition at line 40 of file lru_set.hpp.

VisitAll()

template<typename T, typename Hash = std::hash<impl::StringToStringView<T>>, typename Equal = std::equal_to<impl::StringToStringView<T>>>

template<typename Function>

void cache::LruSet< T, Hash, Equal >::VisitAll ( Function && func ) const

inline

Call Function(const T&) for all items.

Definition at line 47 of file lru_set.hpp.

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The documentation for this class was generated from the following file:

• userver/cache/lru_set.hpp