PFS_buffer_default_array< T > Class Template Reference

#include <pfs_buffer_container.h>

Public Types
typedef T	value_type

Public Member Functions
value_type *	allocate (pfs_dirty_state *dirty_state)
void	deallocate (value_type *pfs)
T *	get_first ()
T *	get_last ()

Public Attributes
std::atomic< bool >	m_full {false}
	Page full flag. More...
PFS_cacheline_atomic_size_t	m_monotonic
	Monotonic counter. More...
std::atomic< T * >	m_ptr {nullptr}
	Array of values. More...
std::atomic< size_t >	m_max {0}
	Max number of items in the page. More...
std::atomic< PFS_opaque_container * >	m_container {nullptr}
	Container. More...

Member Typedef Documentation

value_type

template<class T >

typedef T PFS_buffer_default_array< T >::value_type

Member Function Documentation

allocate()

template<class T >

value_type * PFS_buffer_default_array< T >::allocate ( pfs_dirty_state *  dirty_state )

inline

deallocate()

template<class T >

void PFS_buffer_default_array< T >::deallocate ( value_type *  pfs )

inline

get_first()

template<class T >

T * PFS_buffer_default_array< T >::get_first ( )

inline

get_last()

template<class T >

T * PFS_buffer_default_array< T >::get_last ( )

inline

Member Data Documentation

m_container

template<class T >

std::atomic<PFS_opaque_container *> PFS_buffer_default_array< T >::m_container {nullptr}

Container.

Concurrency profile:

• written once on page creation
• read only during normal operations.

m_full

template<class T >

std::atomic<bool> PFS_buffer_default_array< T >::m_full {false}

Page full flag.

Concurrency profile:

• mostly read during normal operations.
• do not perform useless write, check for previous value first
• occasional write on state changes

m_max

template<class T >

std::atomic<size_t> PFS_buffer_default_array< T >::m_max {0}

Max number of items in the page.

Concurrency profile:

• written once on page creation
• read only during normal operations.

m_monotonic

template<class T >

PFS_cacheline_atomic_size_t PFS_buffer_default_array< T >::m_monotonic

Monotonic counter.

This counter is used to access items in the page.

Concurrency profile:

• frequent read and write, must be on its own cacheline

m_ptr

template<class T >

std::atomic<T *> PFS_buffer_default_array< T >::m_ptr {nullptr}

Array of values.

Concurrency profile:

• written once on page creation
• read only during normal operations.

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

• storage/perfschema/pfs_buffer_container.h