Gecode::region_allocator< T > Struct Template Reference
[Using allocators with Gecode]
Allocator that allocates memory from a region. More...
#include <allocators.hpp>
Classes | |
| struct | rebind |
| Rebinding helper (returns the type of a similar allocator for type U). More... | |
Public Types | |
| typedef T | value_type |
| Type of objects the allocator creates. This is identical to T. | |
| typedef size_t | size_type |
| Type that can represent the size of the largest object. | |
| typedef ptrdiff_t | difference_type |
| Type that can represent the difference between any two pointers. | |
| typedef T * | pointer |
| Type of pointers returned by the allocator. | |
| typedef T const * | const_pointer |
| Const version of pointer. | |
| typedef T & | reference |
| Non-const reference to T. | |
| typedef T const & | const_reference |
| Const reference to T. | |
Public Member Functions | |
| region_allocator (Region ®ion) throw () | |
| Construction. | |
| region_allocator (region_allocator const &al) throw () | |
| Copy construction. | |
| template<class U > | |
| region_allocator (region_allocator< U > const &al) throw () | |
| Copy from other instantiation. | |
| pointer | address (reference x) const |
| Convert a reference x to a pointer. | |
| const_pointer | address (const_reference x) const |
| Convert a const reference x to a const pointer. | |
| size_type | max_size (void) const throw () |
| Returns the largest size for which a call to allocate might succeed. | |
| pointer | allocate (size_type count) |
| Allocates storage. | |
| pointer | allocate (size_type count, const void *const hint) |
| Allocates storage. | |
| void | deallocate (pointer p, size_type count) |
| Deallocates storage. | |
| void | construct (pointer element, const_reference t) |
| Constructs an object. | |
| void | destroy (pointer element) |
| Calls the destructor on the object pointed to by element. | |
Public Attributes | |
| Region & | region |
| The region that we allocate objects from. | |
Detailed Description
template<class T>
struct Gecode::region_allocator< T >
Allocator that allocates memory from a region.
Note that this allocator may be used to construct dynamic data structures that allocate memory from the region, or even reside in the region as a whole.
Definition at line 338 of file allocators.hpp.
Member Typedef Documentation
| typedef T Gecode::region_allocator< T >::value_type |
Type of objects the allocator creates. This is identical to T.
Definition at line 340 of file allocators.hpp.
| typedef size_t Gecode::region_allocator< T >::size_type |
Type that can represent the size of the largest object.
Definition at line 342 of file allocators.hpp.
| typedef ptrdiff_t Gecode::region_allocator< T >::difference_type |
Type that can represent the difference between any two pointers.
Definition at line 344 of file allocators.hpp.
| typedef T* Gecode::region_allocator< T >::pointer |
Type of pointers returned by the allocator.
Definition at line 346 of file allocators.hpp.
| typedef T const* Gecode::region_allocator< T >::const_pointer |
Const version of pointer.
Definition at line 348 of file allocators.hpp.
| typedef T& Gecode::region_allocator< T >::reference |
Non-const reference to T.
Definition at line 350 of file allocators.hpp.
| typedef T const& Gecode::region_allocator< T >::const_reference |
Const reference to T.
Definition at line 352 of file allocators.hpp.
Constructor & Destructor Documentation
| Gecode::region_allocator< T >::region_allocator | ( | Region & | region | ) | throw () [inline] |
Construction.
- Parameters:
-
region The region to allocate objects from.
Definition at line 367 of file allocators.hpp.
| Gecode::region_allocator< T >::region_allocator | ( | region_allocator< T > const & | al | ) | throw () [inline] |
Copy construction.
- Parameters:
-
al The allocator to copy.
Definition at line 373 of file allocators.hpp.
| Gecode::region_allocator< T >::region_allocator | ( | region_allocator< U > const & | al | ) | throw () [inline] |
Copy from other instantiation.
- Parameters:
-
al The source allocator.
Definition at line 380 of file allocators.hpp.
Member Function Documentation
| pointer Gecode::region_allocator< T >::address | ( | reference | x | ) | const [inline] |
Convert a reference x to a pointer.
Definition at line 384 of file allocators.hpp.
| const_pointer Gecode::region_allocator< T >::address | ( | const_reference | x | ) | const [inline] |
Convert a const reference x to a const pointer.
Definition at line 386 of file allocators.hpp.
| size_type Gecode::region_allocator< T >::max_size | ( | void | ) | const throw () [inline] |
Returns the largest size for which a call to allocate might succeed.
Definition at line 388 of file allocators.hpp.
| pointer Gecode::region_allocator< T >::allocate | ( | size_type | count | ) | [inline] |
Allocates storage.
Returns a pointer to the first element in a block of storage count*sizeof(T) bytes in size. The block is aligned appropriately for objects of type T. Throws the exception bad_alloc if the storage is unavailable.
Definition at line 401 of file allocators.hpp.
| pointer Gecode::region_allocator< T >::allocate | ( | size_type | count, | |
| const void *const | hint | |||
| ) | [inline] |
Allocates storage.
Returns a pointer to the first element in a block of storage count*sizeof(T) bytes in size. The block is aligned appropriately for objects of type T. Throws the exception bad_alloc if the storage is unavailable.
The (unused) parameter could be used as an allocation hint, but this allocator ignores it.
Definition at line 416 of file allocators.hpp.
| void Gecode::region_allocator< T >::deallocate | ( | pointer | p, | |
| size_type | count | |||
| ) | [inline] |
Deallocates storage.
Deallocates storage obtained by a call to allocate() with arguments count and p. Note that region allocator never actually deallocates memory (so this function does nothing); the memory is released when the region is destroyed.
Definition at line 429 of file allocators.hpp.
| void Gecode::region_allocator< T >::construct | ( | pointer | element, | |
| const_reference | t | |||
| ) | [inline] |
Constructs an object.
Constructs an object of type T with the initial value of t at the location specified by element. This function calls the placement new() operator.
Definition at line 440 of file allocators.hpp.
| void Gecode::region_allocator< T >::destroy | ( | pointer | element | ) | [inline] |
Calls the destructor on the object pointed to by element.
Definition at line 445 of file allocators.hpp.
Member Data Documentation
| Region& Gecode::region_allocator< T >::region |
The region that we allocate objects from.
Definition at line 361 of file allocators.hpp.
The documentation for this struct was generated from the following file:
- gecode/kernel/memory/allocators.hpp