Eigen::aligned_allocator< T > Class Template Reference

STL compatible allocator to use with types requiring a non standrad alignment. More...

#include <Memory.h>

Inheritance diagram for Eigen::aligned_allocator< T >:

Data Structures
struct	rebind

Public Types
typedef std::size_t	size_type
typedef std::ptrdiff_t	difference_type
typedef T *	pointer
typedef const T *	const_pointer
typedef T &	reference
typedef const T &	const_reference
typedef T	value_type

Public Member Functions
	aligned_allocator (const aligned_allocator &other)
template<class U >
	aligned_allocator (const aligned_allocator< U > &other)
pointer	allocate (size_type num, const void *=0)
void	deallocate (pointer p, size_type)

Detailed Description

template<class T>
class Eigen::aligned_allocator< T >

STL compatible allocator to use with types requiring a non standrad alignment.

The memory is aligned as for dynamically aligned matrix/array types such as MatrixXd. By default, it will thus provide at least 16 bytes alignment and more in following cases:

• 32 bytes alignment if AVX is enabled.
• 64 bytes alignment if AVX512 is enabled.

This can be controlled using the EIGEN_MAX_ALIGN_BYTES macro as documented there .

Example:

// Matrix4f requires 16 bytes alignment:
std::map< int, Matrix4f, std::less<int>,
          aligned_allocator<std::pair<const int, Matrix4f> > > my_map_mat4;
// Vector3f does not require 16 bytes alignment, no need to use Eigen's allocator:
std::map< int, Vector3f > my_map_vec3;

See also

\blank TopicStlContainers.

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

• External/Eigen/src/Core/util/Memory.h