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Low level memory management

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< cpp‎ | memory

Compiler support

Freestanding and hosted

Standard library

Standard library headers

Named requirements

Feature test macros (C++20)

Language support library

Concepts library (C++20)

Diagnostics library

Memory management library

Metaprogramming library (C++11)

General utilities library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Strings library

Text processing library

Numerics library

Date and time library

Input/output library

Filesystem library (C++17)

Concurrency support library (C++11)

Execution control library (C++26)

Technical specifications

External libraries

Utilities library

Language support

Type support (basic types, RTTI)

Library feature-test macros (C++20)

Program utilities

Variadic functions

initializer_list

(C++11)

is_constant_evaluated

(C++20)

is_within_lifetime

(C++26)

source_location

(C++20)

Coroutine support (C++20)

Contract support (C++26)

Three-way comparison

three_way_comparablethree_way_comparable_with

(C++20)(C++20)

strong_ordering

(C++20)

(C++20)

partial_ordering

(C++20)

common_comparison_category

(C++20)

compare_three_way_result

(C++20)

compare_three_way

(C++20)

(C++20)

(C++20)

(C++20)

compare_strong_order_fallback

(C++20)

compare_weak_order_fallback

(C++20)

compare_partial_order_fallback

(C++20)

is_eqis_ltis_lteq

(C++20)(C++20)(C++20)

is_neqis_gtis_gteq

(C++20)(C++20)(C++20)

General utilities

Function objects

Bit manipulation (C++20)

C-style bit manipulation (C++26)

(C++11)

Relational operators (deprecated in C++20)

rel_ops::operator!=rel_ops::operator>

rel_ops::operator<=rel_ops::operator>=

Integer comparison functions

cmp_equalcmp_lesscmp_less_than

(C++20)(C++20)(C++20)

cmp_not_equalcmp_greatercmp_greater_than

(C++20)(C++20)(C++20)

(C++20)

Swap and type operations

(C++20)

(C++14)

(C++11)

(C++23)

(C++11)

(C++23)

(C++11)

move_if_noexcept

(C++11)

(C++17)

Common vocabulary types

(C++11)

(C++17)

(C++17)

(C++17)

(C++11)

(C++11)

(C++17)

make_from_tuple

(C++17)

(C++23)

Memory management library

(exposition only*)

allocator_traits

(C++11)

allocation_result

(C++23)

scoped_allocator_adaptor

(C++11)

pmr::polymorphic_allocator

(C++17)

(C++11)

(C++11)

uses_allocator_construction_args

(C++20)

make_obj_using_allocator

(C++20)

uninitialized_construct_using_allocator

(C++20)

Uninitialized memory algorithms

uninitialized_copy

uninitialized_fill

uninitialized_move

(C++17)

uninitialized_copy_n

(C++11)

uninitialized_fill_n

uninitialized_move_n

(C++17)

(C++20)

uninitialized_default_construct

(C++17)

uninitialized_value_construct

(C++17)

(C++17)

uninitialized_default_construct_n

(C++17)

uninitialized_value_construct_n

(C++17)

(C++17)

(C++17)

Constrained uninitialized memory algorithms

ranges::uninitialized_copy

(C++20)

ranges::uninitialized_fill

(C++20)

ranges::uninitialized_move

(C++20)

ranges::uninitialized_copy_n

(C++20)

ranges::uninitialized_fill_n

(C++20)

ranges::uninitialized_move_n

(C++20)

ranges::construct_at

(C++20)

ranges::uninitialized_default_construct

(C++20)

ranges::uninitialized_value_construct

(C++20)

ranges::destroy

(C++20)

ranges::uninitialized_default_construct_n

(C++20)

ranges::uninitialized_value_construct_n

(C++20)

ranges::destroy_n

(C++20)

ranges::destroy_at

(C++20)

Memory resources

pmr::memory_resource

(C++17)

pmr::get_default_resource

(C++17)

pmr::set_default_resource

(C++17)

pmr::new_delete_resource

(C++17)

pmr::pool_options

(C++17)

pmr::null_memory_resource

(C++17)

pmr::synchronized_pool_resource

(C++17)

pmr::unsynchronized_pool_resource

(C++17)

pmr::monotonic_buffer_resource

(C++17)

Explicit lifetime management

start_lifetime_as

(C++23)

start_lifetime_as_array

(C++23)

Types for composite class design

(C++26)

(C++26)

Uninitialized storage (until C++20)

raw_storage_iterator

(until C++20*)

get_temporary_buffer

(until C++20*)

return_temporary_buffer

(until C++20*)

Garbage collector support (until C++23)

declare_reachable

(C++11)(until C++23)

declare_no_pointers

(C++11)(until C++23)

(C++11)(until C++23)

undeclare_reachable

(C++11)(until C++23)

undeclare_no_pointers

(C++11)(until C++23)

get_pointer_safety

(C++11)(until C++23)

Low level memory
management

operator newoperator new[]

operator deleteoperator delete[]

set_new_handler

get_new_handler

(C++11)

bad_array_new_length

(C++11)

(C++17)

destroying_delete_t

(C++20)

(C++17)

(C++11)

(C++11)

(C++11)

(until C++17*)

(C++11)

owner_less<void>

(C++17)

(C++26)

(C++26)

enable_shared_from_this

(C++11)

(C++11)

(C++11)

(C++23)

(C++23)

(C++11)

(C++20)

(C++11)

(C++11)

(C++20)

is_sufficiently_aligned

(C++26)

(C++17)

Low level memory management

operator newoperator new[]

operator deleteoperator delete[]

get_new_handler

(C++11)

set_new_handler

bad_array_new_length

(C++11)

(C++17)

destroying_delete

(C++20)

(C++17)

The new-expression is the only way to create an object or an array of objects with dynamic storage duration, that is, with lifetime not restricted to the scope in which it is created. A new-expression obtains storage by calling an allocation function. A delete-expression destroys a most derived object or an array created by a new-expression and calls the deallocation function. The default allocation and deallocation functions, along with related functions, types, and objects, are declared in the header <new>.

Defined in header <new>

Contents

Functions

operator newoperator new[]

allocation functions
(function) [edit]

operator deleteoperator delete[]

deallocation functions
(function) [edit]

get_new_handler

(C++11)

obtains the current new handler
(function) [edit]

set_new_handler

registers a new handler
(function) [edit]

Classes

exception thrown when memory allocation fails
(class) [edit]

bad_array_new_length

(C++11)

exception thrown on allocation of array with invalid length
(class) [edit]

(C++17)

type used to pass alignment to alignment-aware allocation and deallocation functions
(enum) [edit]

Types

function pointer type of the new handler
(typedef) [edit]

Objects

nothrownothrow_t

a tag used to select a non-throwing allocation function
(tag)[edit]

destroying_deletedestroying_delete_t

(C++20)

a tag used to select destroying-delete overloads of operator delete
(tag)[edit]

Object access

(C++17)

pointer optimization barrier
(function template) [edit]

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