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Dune::Pool< T, s > Class Template Reference
A memory pool of objects. More...
#include <dune/common/poolallocator.hh>
Public Types | |
typedef T | MemberType |
The type of object we allocate memory for. | |
Public Member Functions | |
Pool () | |
Constructor. | |
~Pool () | |
Destructor. | |
void * | allocate () |
Get a new or recycled object. More... | |
void | free (void *o) |
Free an object. More... | |
void | print (std::ostream &os) |
Print elements in pool for debugging. | |
Static Public Attributes | |
static constexpr int | unionSize |
The size of a union of Reference and MemberType. | |
static constexpr int | size |
Size requirement. At least one object has to stored. | |
static constexpr int | alignment = std::lcm(alignof(MemberType), alignof(Reference)) |
The alignment that suits both the MemberType and the Reference (i.e. their least common multiple). | |
static constexpr int | alignedSize |
The aligned size of the type. More... | |
static constexpr int | chunkSize |
The size of each chunk memory chunk. More... | |
static constexpr int | elements = (chunkSize / alignedSize) |
The number of element each chunk can hold. | |
Detailed Description
template<class T, std::size_t s>
class Dune::Pool< T, s >
class Dune::Pool< T, s >
A memory pool of objects.
The memory for the objects is organized in chunks. Each chunks is capable of holding a specified number of objects. The allocated objects will be properly aligned for fast access. Deallocated objects are cached for reuse to prevent memory fragmentation.
- Warning
- If the size of the objects allocated is less than the size of a pointer memory is wasted.
- Due to aligned issues at the number of bytes of the alignment prerequisite (< 4 bytes) are wasted. This effect becomes negligible for big sizes of chunkSize.
- Template Parameters
-
T The type that is allocated by us. s The size of a memory chunk in bytes.
Member Data Documentation
◆ alignedSize
template<class T , std::size_t s>
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staticconstexpr |
Initial value:
static constexpr int alignment
The alignment that suits both the MemberType and the Reference (i.e. their least common multiple).
Definition: poolallocator.hh:127
static constexpr int unionSize
The size of a union of Reference and MemberType.
Definition: poolallocator.hh:113
The aligned size of the type.
This size is bigger than sizeof of the type and a multiple of the alignment requirement.
Referenced by Dune::Pool< T, s >::Pool().
◆ chunkSize
template<class T , std::size_t s>
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staticconstexpr |
Initial value:
static constexpr int size
Size requirement. At least one object has to stored.
Definition: poolallocator.hh:120
The size of each chunk memory chunk.
Will be adapted to be a multiple of the alignment
Referenced by Dune::Pool< T, s >::Pool().
The documentation for this class was generated from the following file:
- dune/common/poolallocator.hh
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Legal Statements / Impressum |
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