Dune::PoolAllocator< T, s > Class Template Reference

An allocator managing a pool of objects for reuse. More...

#include <dune/common/poolallocator.hh>

Classes
struct	rebind
	Rebind the allocator to another type. More...

Public Types
enum	{ size =s*sizeof(value_type) }
typedef T	value_type
	Type of the values we construct and allocate.
typedef T *	pointer
	The pointer type.
typedef const T *	const_pointer
	The constant pointer type.
typedef T &	reference
	The reference type.
typedef const T &	const_reference
	The constant reference type.
typedef std::size_t	size_type
	The size type.
typedef std::ptrdiff_t	difference_type
	The difference_type.
typedef Pool< T, size >	PoolType
	The type of the memory pool we use.

Public Member Functions
	PoolAllocator ()
	Constructor.
template<typename U , std::size_t u>
	PoolAllocator (const PoolAllocator< U, u > &)
	Copy Constructor that does not copy the memory pool.
	PoolAllocator (const PoolAllocator &)
	Copy constructor that does not copy the memory pool.
pointer	allocate (std::size_t n, const_pointer hint=0)
	Allocates objects. More...
void	deallocate (pointer p, std::size_t n)
	Free objects. More...
void	construct (pointer p, const_reference value)
	Construct an object. More...
void	destroy (pointer p)
	Destroy an object without freeing memory. More...
pointer	address (reference x) const
	Convert a reference to a pointer.
const_pointer	address (const_reference x) const
	Convert a reference to a pointer.
int	max_size () const noexcept
	Not correctly implemented, yet!

Detailed Description

template<class T, std::size_t s>
class Dune::PoolAllocator< T, s >

An allocator managing a pool of objects for reuse.

This allocator is specifically useful for small data types where new and delete are too expensive.

It uses a pool of memory chunks where the objects will be allocated. This means that assuming that N objects fit into memory only every N-th request for an object will result in memory allocation.

Warning

It is not suitable for the use in standard containers as it cannot allocate arrays of arbitrary size

Template Parameters

T	The type that will be allocated.
s	The number of elements to fit into one memory chunk.

Member Enumeration Documentation

anonymous enum

template<class T , std::size_t s>

anonymous enum

Enumerator
size	The number of objects to fit into one memory chunk allocated.

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

• dune/common/poolallocator.hh