G3D::AreaMemoryManager Class Reference

Allocates memory in large blocks and then frees it as an area. More...

Inherits G3D::MemoryManager.

Public Member Functions
	~AreaMemoryManager ()
	Invokes deallocateAll. More...
virtual void *	alloc (size_t s)
	Allocates memory out of the buffer pool. More...
size_t	bytesAllocated () const
void	deallocateAll ()
	Deletes all previously allocated memory. More...
virtual void	free (void *x)
	Ignored. More...
virtual bool	isThreadsafe () const
	Returns true if this memory manager is threadsafe (i.e., alloc and free can be called asychronously) More...

Static Public Member Functions
static shared_ptr< MemoryManager >	create ()
	Return the instance. More...
static shared_ptr< AreaMemoryManager >	create (size_t sizeHint=10 *1024 *1024)

Static Protected Member Functions
template<class T , class ... ArgTypes>
static shared_ptr< T >	createShared (ArgTypes &&... args)
	Like std::make_shared, but works for protected constructors. More...

Detailed Description

Allocates memory in large blocks and then frees it as an area.

Useful for ensuring cache coherence and for reducing the time cost of multiple allocations and deallocations.

Not threadsafe

Constructor & Destructor Documentation

~AreaMemoryManager()

G3D::AreaMemoryManager::~AreaMemoryManager

(

)

Invokes deallocateAll.

Member Function Documentation

alloc()

virtual void* G3D::AreaMemoryManager::alloc ( size_t  s )

virtual

Allocates memory out of the buffer pool.

Parameters

s	must be no larger than sizeHint

Reimplemented from G3D::MemoryManager.

bytesAllocated()

size_t G3D::AreaMemoryManager::bytesAllocated

(

)

const

create() [1/2]

static shared_ptr<MemoryManager> G3D::MemoryManager::create ( )

staticinherited

Return the instance.

There's only one instance of the default MemoryManager; it is cached after the first creation.

Referenced by G3D::Array< G3D::AABox >::Array(), G3D::categorizeByDerivedType(), and G3D::Table< String, double >::Table().

create() [2/2]

static shared_ptr<AreaMemoryManager> G3D::AreaMemoryManager::create ( size_t  sizeHint = 10 *1024 *1024 )

static

Parameters

sizeHint

Total amount of memory expected to be allocated. The allocator will allocate memory from the system in increments of this size.

createShared()

template<class T , class ... ArgTypes>

static shared_ptr<T> G3D::ReferenceCountedObject::createShared ( ArgTypes &&...  args )

inlinestaticprotectedinherited

Like std::make_shared, but works for protected constructors.

Call as createShared<myclass>.

deallocateAll()

void G3D::AreaMemoryManager::deallocateAll

(

)

Deletes all previously allocated memory.

Because delete is not invoked on objects in this memory, it is not safe to simply free memory containing C++ objects that expect their destructors to be called.

free()

virtual void G3D::AreaMemoryManager::free ( void *  x )

virtual

Ignored.

Reimplemented from G3D::MemoryManager.

isThreadsafe()

virtual bool G3D::AreaMemoryManager::isThreadsafe ( ) const

virtual

Returns true if this memory manager is threadsafe (i.e., alloc and free can be called asychronously)

Reimplemented from G3D::MemoryManager.