GstHw::GstHwImportCache< Key, Resource, KeyHash > Class Template Reference

#include <GstHwImportCache.h>

Public Types
using	Deleter = std::function< void(const Key &, Resource &)>

Public Member Functions
	GstHwImportCache (std::size_t capacity, Deleter deleter)
	~GstHwImportCache ()
	GstHwImportCache (const GstHwImportCache &)=delete
GstHwImportCache &	operator= (const GstHwImportCache &)=delete
Resource *	find (const Key &key)
void	insert (const Key &key, Resource resource)
template<class Pred >
void	eraseIf (Pred pred)
	Erase every entry whose key or resource satisfies pred, deleting each via the configured deleter.
void	clear ()
bool	empty () const noexcept
std::size_t	size () const noexcept

Detailed Description

template<class Key, class Resource, class KeyHash = std::hash<Key>>
class GstHw::GstHwImportCache< Key, Resource, KeyHash >

Bounded LRU cache for GPU import resources (EGLImages, QRhiTexture wrappers). Keyed on a hashable Key; Resource is destroyed via the caller-supplied deleter on eviction, erase and clear. Not internally synchronized — the caller owns whatever locking the resource lifetime requires (DMABuf holds a mutex; the GL path is render-thread-confined).

Definition at line 14 of file GstHwImportCache.h.

Member Typedef Documentation

Deleter

template<class Key , class Resource , class KeyHash = std::hash<Key>>

using GstHw::GstHwImportCache< Key, Resource, KeyHash >::Deleter = std::function<void(const Key&, Resource&)>

Definition at line 17 of file GstHwImportCache.h.

Constructor & Destructor Documentation

GstHwImportCache() [1/2]

template<class Key , class Resource , class KeyHash = std::hash<Key>>

GstHw::GstHwImportCache< Key, Resource, KeyHash >::GstHwImportCache ( std::size_t  capacity, Deleter  deleter  )

inline

Definition at line 19 of file GstHwImportCache.h.

~GstHwImportCache()

template<class Key , class Resource , class KeyHash = std::hash<Key>>

GstHw::GstHwImportCache< Key, Resource, KeyHash >::~GstHwImportCache ( )

inline

Definition at line 21 of file GstHwImportCache.h.

References GstHw::GstHwImportCache< Key, Resource, KeyHash >::clear().

GstHwImportCache() [2/2]

template<class Key , class Resource , class KeyHash = std::hash<Key>>

GstHw::GstHwImportCache< Key, Resource, KeyHash >::GstHwImportCache ( const GstHwImportCache< Key, Resource, KeyHash > &  )

delete

Member Function Documentation

clear()

template<class Key , class Resource , class KeyHash = std::hash<Key>>

void GstHw::GstHwImportCache< Key, Resource, KeyHash >::clear ( )

inline

Definition at line 75 of file GstHwImportCache.h.

Referenced by GstHw::GstHwImportCache< Key, Resource, KeyHash >::~GstHwImportCache().

empty()

template<class Key , class Resource , class KeyHash = std::hash<Key>>

bool GstHw::GstHwImportCache< Key, Resource, KeyHash >::empty ( ) const

inlinenoexcept

Definition at line 84 of file GstHwImportCache.h.

eraseIf()

template<class Key , class Resource , class KeyHash = std::hash<Key>>

template<class Pred >

void GstHw::GstHwImportCache< Key, Resource, KeyHash >::eraseIf ( Pred  pred )

inline

Erase every entry whose key or resource satisfies pred, deleting each via the configured deleter.

Definition at line 62 of file GstHwImportCache.h.

find()

template<class Key , class Resource , class KeyHash = std::hash<Key>>

Resource * GstHw::GstHwImportCache< Key, Resource, KeyHash >::find ( const Key &  key )

inline

MRU-promoting lookup; returns the stored Resource pointer or nullptr on miss. The pointer is invalidated by the next insert()/eraseIf()/clear() on this cache (a different-key insert can evict it) — never hold it across one.

Definition at line 28 of file GstHwImportCache.h.

insert()

template<class Key , class Resource , class KeyHash = std::hash<Key>>

void GstHw::GstHwImportCache< Key, Resource, KeyHash >::insert ( const Key &  key, Resource  resource  )

inline

Insert (evicting the LRU victim first when at capacity). Replaces any existing entry for key, deleting its old resource. Caller must ensure no live alias to a replaced/evicted resource survives.

Definition at line 40 of file GstHwImportCache.h.

operator=()

template<class Key , class Resource , class KeyHash = std::hash<Key>>

GstHwImportCache & GstHw::GstHwImportCache< Key, Resource, KeyHash >::operator= ( const GstHwImportCache< Key, Resource, KeyHash > &  )

delete

size()

template<class Key , class Resource , class KeyHash = std::hash<Key>>

std::size_t GstHw::GstHwImportCache< Key, Resource, KeyHash >::size ( ) const

inlinenoexcept

Definition at line 86 of file GstHwImportCache.h.

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

• src/VideoManager/VideoReceiver/GStreamer/HwBuffers/common/GstHwImportCache.h