Arena Class Reference

#include <lockedpool.h>

Inheritance diagram for Arena:

Classes
struct	Stats
	Memory statistics. More...

Public Member Functions
	Arena (void *base, size_t size, size_t alignment)
virtual	~Arena ()
	Arena (const Arena &other)=delete
Arena &	operator= (const Arena &)=delete
void *	alloc (size_t size)
	Allocate size bytes from this arena. More...
void	free (void *ptr)
	Free a previously allocated chunk of memory. More...
Stats	stats () const
	Get arena usage statistics. More...
bool	addressInArena (void *ptr) const
	Return whether a pointer points inside this arena. More...

Private Attributes
std::map< char *, size_t >	chunks_free
	Map of chunk address to chunk information. More...
std::map< char *, size_t >	chunks_used
char *	base
	Base address of arena. More...
char *	end
	End address of arena. More...
size_t	alignment
	Minimum chunk alignment. More...

Detailed Description

Definition at line 47 of file lockedpool.h.

Constructor & Destructor Documentation

Arena() [1/2]

Arena::Arena	(	void *	base,
		size_t	size,
		size_t	alignment
	)

Definition at line 47 of file lockedpool.cpp.

References base, and chunks_free.

~Arena()

Arena::~Arena ( )

virtual

Definition at line 54 of file lockedpool.cpp.

Arena() [2/2]

Arena::Arena ( const Arena &  other )

delete

Member Function Documentation

addressInArena()

bool Arena::addressInArena ( void *  ptr ) const

inline

Return whether a pointer points inside this arena.

This returns base <= ptr < (base+size) so only use it for (inclusive) chunk starting addresses.

Definition at line 89 of file lockedpool.h.

References base, and end.

alloc()

void * Arena::alloc

(

size_t

size

)

Allocate size bytes from this arena.

Returns pointer on success, or 0 if memory is full or the application tried to allocate 0 bytes.

Definition at line 58 of file lockedpool.cpp.

References align_up(), alignment, chunks_free, and chunks_used.

Referenced by BenchLockedPool().

free()

void Arena::free

(

void *

ptr

)

Free a previously allocated chunk of memory.

Freeing the zero pointer has no effect. Raises std::runtime_error in case of error.

Definition at line 89 of file lockedpool.cpp.

References chunks_free, chunks_used, and extend().

Referenced by BenchLockedPool().

operator=()

Arena& Arena::operator= ( const Arena &  )

delete

stats()

Arena::Stats Arena::stats

(

)

const

Get arena usage statistics.

Definition at line 113 of file lockedpool.cpp.

References chunks_free, and chunks_used.

Member Data Documentation

alignment

size_t Arena::alignment

private

Minimum chunk alignment.

Definition at line 101 of file lockedpool.h.

Referenced by alloc().

base

char* Arena::base

private

Base address of arena.

Definition at line 97 of file lockedpool.h.

Referenced by addressInArena(), and Arena().

chunks_free

std::map<char*, size_t> Arena::chunks_free

private

Map of chunk address to chunk information.

This class makes use of the sorted order to merge previous and next chunks during deallocation.

Definition at line 94 of file lockedpool.h.

Referenced by alloc(), Arena(), free(), and stats().

chunks_used

std::map<char*, size_t> Arena::chunks_used

private

Definition at line 95 of file lockedpool.h.

Referenced by alloc(), free(), and stats().

end

char* Arena::end

private

End address of arena.

Definition at line 99 of file lockedpool.h.

Referenced by addressInArena().

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

• src/support/lockedpool.h
• src/support/lockedpool.cpp