SkChunkAlloc Class Reference

Inheritance diagram for SkChunkAlloc:

Public Types
enum	AllocFailType { kReturnNil_AllocFailType, kThrow_AllocFailType }

Public Member Functions
	SkChunkAlloc (size_t minSize)
void	reset ()
	Free up all allocated blocks. More...
void	rewind ()
	Reset to 0 used bytes preserving as much memory as possible. More...
void *	alloc (size_t bytes, AllocFailType)
	Allocates a memory block of size bytes. More...
void *	allocThrow (size_t bytes)
	Shortcut for calling alloc with kThrow_AllocFailType.
size_t	unalloc (void *ptr)
	Call this to unalloc the most-recently allocated ptr by alloc(). More...
size_t	totalCapacity () const
size_t	totalUsed () const
int	blockCount () const
size_t	totalLost () const
bool	contains (const void *addr) const
	Returns true if the specified address is within one of the chunks, and has at least 1-byte following the address (i.e. More...

Private Member Functions
Block *	newBlock (size_t bytes, AllocFailType ftype)
Block *	addBlockIfNecessary (size_t bytes, AllocFailType ftype)
void	validate ()

Private Attributes
Block *	fBlock
size_t	fMinSize
size_t	fChunkSize
size_t	fTotalCapacity
size_t	fTotalUsed
int	fBlockCount
size_t	fTotalLost

Member Function Documentation

void* SkChunkAlloc::alloc	(	size_t	bytes,
		AllocFailType
	)

Allocates a memory block of size bytes.

On success: returns a pointer to beginning of memory block that is 8 byte aligned. The content of allocated block is not initialized. On failure: calls abort() if called with kThrow_AllocFailType, otherwise returns NULL pointer.

bool SkChunkAlloc::contains

(

const void *

addr

)

const

Returns true if the specified address is within one of the chunks, and has at least 1-byte following the address (i.e.

if addr points to the end of a chunk, then contains() will return false).

void SkChunkAlloc::reset

(

)

Free up all allocated blocks.

This invalidates all returned pointers.

void SkChunkAlloc::rewind

(

)

Reset to 0 used bytes preserving as much memory as possible.

This invalidates all returned pointers.

size_t SkChunkAlloc::unalloc

(

void *

ptr

)

Call this to unalloc the most-recently allocated ptr by alloc().

On success, the number of bytes freed is returned, or 0 if the block could not be unallocated. This is a hint to the underlying allocator that the previous allocation may be reused, but the implementation is free to ignore this call (and return 0).

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

• include/core/SkChunkAlloc.h