std::pmr::memory_resource::do_is_equal

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[edit]

Memory management library

voidify

(exposition only*)

Allocators

allocator
allocator_traits (C++11)
allocation_result (C++23)
scoped_allocator_adaptor (C++11)
pmr::polymorphic_allocator (C++17)

allocator_arg (C++11)
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make_obj_using_allocator (C++20)
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uninitialized_copy
uninitialized_fill
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uninitialized_copy_n (C++11)
uninitialized_fill_n
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construct_at (C++20)

uninitialized_default_construct (C++17)
uninitialized_value_construct (C++17)
destroy (C++17)
uninitialized_default_construct_n (C++17)
uninitialized_value_construct_n (C++17)
destroy_n (C++17)
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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
indirect (C++26)
polymorphic (C++26)

Uninitialized storage(until C++20)

raw_storage_iterator (until C++20*)
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return_temporary_buffer (until C++20*)

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declare_reachable (C++11)(until C++23)
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undeclare_reachable (C++11)(until C++23)
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get_pointer_safety (C++11)(until C++23)

Low level memory
management

operator newoperator new[]

operator deleteoperator delete[]

(C++11)

(C++11)

(C++17)

(C++20)

(C++17)

(C++11)

(C++11)

(C++11)

(until C++17*)

(C++11)

(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 Library

malloc
calloc
realloc

free
aligned_alloc (C++17)

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std::pmr::memory_resource

memory_resource::memory_resource
Public member functions
memory_resource::allocate
memory_resource::deallocate
memory_resource::is_equal
Private member functions
memory_resource::do_allocate
memory_resource::do_deallocate
memory_resource::do_is_equal
Non-member functions
operator==operator!= (until C++20)

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virtualbool do_is_equal(conststd::pmr::memory_resource& other)constnoexcept=0;		(since C++17)

Compares*this for equality withother.

Twomemory_resources compare equal if and only if memory allocated from onememory_resource can be deallocated from the other and vice versa.

[edit] Notes

The most-derived type ofother may not match the most derived type of*this. A derived class implementation therefore must typically check whether the most derived types of*this andother match usingdynamic_cast, and immediately returnfalse if the cast fails.

[edit] See also

is_equal

compare for equality with anothermemory_resource
(public member function)[edit]

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std::pmr::memory_resource::do_is_equal

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