DD::Image::BlockAllocator Class Reference

Inheritance diagram for DD::Image::BlockAllocator:

Public Member Functions
	BlockAllocator (const char *allocatorName, const SmallBlockDefinition definition=SmallBlockDefinition())
void *	allocate (size_t size)
template<typename T >
T *	allocate (size_t numItems)
template<typename T >
T *	New ()
void	deallocate (void *memory)
template<typename T >
void	Delete (T *memory)
const char *	getName () const override
const char *	getType () const override
size_t	getAllocatorUsage () const override
size_t	getAllocatorHighWaterMark () const override
size_t	getRequestedUsage () const override
size_t	getRequestedHighWaterMark () const override
void	resetHighWaterMark () override

Additional Inherited Members
Static Public Member Functions inherited from DD::Image::IAllocator
template<typename T >
static T *	getAllocator (IAllocator *pAllocator)
	Helper function for returning a concrete allocator type.

Detailed Description

Block Allocator

This is a thread-safe allocator that, for particular sizes defined on construction, will allocate in blocks a given size and then use these instead of calling malloc

This stops lots of malloc calls, which will speed up slow system memory calls in most cases, at the expense of a memory overhead.

If a call is made to allocate outside the small block size, then it will call directly through to DD::Image::Memory::allocate()

It also tracks how much memory is currently being used by the given allocator instance