carb::Allocator

Defined in carb/Memory.h

Structs

carb::Allocator::rebind: A struct that allows determining an allocator for class U through the other type.

template<class T, class Align = std::integral_constant<size_t, 0>> class Allocator

A class implementing the ‘Allocator’ C++ Named Requirement.

This class is usable for C++ classes that require an allocator, such as std::vector.

Note

This class requires dynamic or static linking to carb.dll/libcarb.so/libcarb.dylib in order to function.

Template Parameters

T – The type to allocate
Align – The requested alignment as a std::integral_constant<size_t, value>. This must be a type in order to conform to the requirements of std::allocator_traits that template parameters be types. The constant value must be zero or a power of two. Zero indicates to use T’s required alignment.

Public Types

using pointer = T*: pointer

using const_pointer = const T*: const_pointer

using reference = T&: reference

using const_reference = const T&: const_reference

using void_pointer = void*: void_pointer

using const_void_pointer = const void*: const_void_pointer

using value_type = T : value_type

using size_type = std::size_t: size_type

using difference_type = std::ptrdiff_t: difference_type

Public Functions

constexpr Allocator() noexcept = default: Constructor.

constexpr Allocator(const Allocator&) noexcept = default: Copy constructor.

constexpr Allocator &operator=(const Allocator&) noexcept = default: Copy-assign operator.

template<class U, class UAlign> inline constexpr Allocator(const Allocator<U, UAlign> &other) noexcept: Copy constructor.

template<class U, class UAlign> inline constexpr Allocator &operator=(const Allocator<U, UAlign> &other) noexcept: Copy-assign operator.

~Allocator() = default: Destructor.

inline constexpr bool operator==(const Allocator &other) const noexcept: Equality operator.

inline constexpr bool operator!=(const Allocator &other) const noexcept: Inequality operator.

inline pointer allocate(size_type n = 1)

Allocates suitable storage for an array object of type T[n] and creates the array, but does not construct array elements.

If alignment is suitable (that is, not less than the required alignment of T) it is used, otherwise the required alignment of T is used.

Throws: std::bad_alloc – if exceptions are enabled (CARB_EXCEPTIONS_ENABLED) and the underlying carb::allocate() failed.
Parameters: n – The number of elements of T to allocate space for.
Returns: A pointer to memory that can contain an array of type T[n], but no array elements have been constructed.

inline pointer allocate(size_type n, const_void_pointer p)

Same as allocate(size_type) but may use p (nullptr or a pointer obtained from allocate()) to aid locality.

Parameters

n – The number of elements of T to allocate space for.
p – May be nullptr or a pointer obtained from allocate(). If non-nullptr, p is returned.

Returns

A pointer to memory that can contain an array of type T[n], but no array elements have been constructed.

inline void deallocate(pointer p, size_type n) noexcept

Deallocates storage pointed to by p, which must be a value returned by a previous call to allocate() that has not been invalidated by an intervening call to deallocate.

Parameters

p – A value returned by a previous call to allocate() and not previously passed to deallocate.
n – Must be the same size value that was originally passed to allocate().

inline size_type max_size() const noexcept

Returns the largest value that can be passed to allocate().

Returns: the largest value that can be passed to allocate().

template<class X, class ...Args> inline void construct(X *const p, Args&&... args)

Constructs an object of type X in previously-allocated storage at the address pointed to by p, using args as the constructor arguments.

Parameters

p – The pointer at which to construct.
args – The constructor arguments.

template<class X> inline void destroy(X *const p)

Destructs an object of type X pointed to by p but does not deallocate any storage.

Parameters: p – The pointer to an object of type X to destroy.

Public Static Attributes

static constexpr size_t alignment = Align::value: Alignment (non-standard)

template<class U> struct rebind

A struct that allows determining an allocator for class U through the other type.

Public Types

using other = Allocator<U, Align>: The type of Allocator<U>