DUNE PDELab (2.8)
A memory pool of objects. More...
#include <dune/common/poolallocator.hh>
Public Types | |
enum | { unionSize , size , alignment = std::lcm(alignof(MemberType), alignof(Reference)) , alignedSize , chunkSize , elements = (chunkSize / alignedSize) } |
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. | |
Detailed Description
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 Enumeration Documentation
◆ anonymous enum
anonymous enum |
Enumerator | |
---|---|
unionSize | The size of a union of Reference and MemberType. |
size | Size requirement. At least one object has to stored. |
alignment | The alignment that suits both the MemberType and the Reference (i.e. their least common multiple). |
alignedSize | The aligned size of the type. This size is bigger than sizeof of the type and a multiple of the alignment requirement. |
chunkSize | The size of each chunk memory chunk. Will be adapted to be a multiple of the alignment |
elements | The number of element each chunk can hold. |
The documentation for this class was generated from the following file:
- dune/common/poolallocator.hh
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