BumpAllocator

Public Member Functions
void *	bump_alloc (size_t size)
size_t	free_block () const
size_t	grow_spans (size_t needed, bool preallocating)
void	list_arenas (ArenaList &arenas)
size_t	totalmem () const

Detailed Description

BumpAllocator - satisfy allocations by bumping an offset into mmap based spans. This allocator satisfies allocation requests from pre-allocated mmap regions. The regions support transparent huge pages and are setup to allow upwards growth instead of accumulating a long list of individual mappings. As long as enough pre-allocated memory is available, allocation requests are served via a single lock-free offset increment. Atm, no memory is released back to the OS ever.

Member Function Documentation

bump_alloc()

void * bump_alloc

(

size_t

size

)

grow_spans()

size_t grow_spans	(	size_t	needed,
		bool	preallocating
	)

free_block()

size_t free_block

(

)

const

list_arenas()

void list_arenas

(

ArenaList &

arenas

)

totalmem()

size_t totalmem

(

)

const