Experimental library header <experimental/memory_resource>

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Standard library headers

Language support
`<cfloat>`
`<climits>`
`<compare>`(C++20)
`<contracts>`(C++26)
`<coroutine>`(C++20)
`<csetjmp>`
`<csignal>`
`<cstdarg>`
`<cstddef>`
`<cstdint>`(C++11)
`<cstdlib>`
`<exception>`
`<initializer_list>`(C++11)
`<limits>`
`<new>`
`<source_location>`(C++20)
`<stdfloat>`(C++23)
`<typeinfo>`
`<version>`(C++20)
Concepts
`<concepts>`(C++20)
Diagnostics
`<cassert>`
`<cerrno>`
`<debugging>`(C++26)
`<stacktrace>`(C++23)
`<stdexcept>`
`<system_error>`(C++11)
Memory management
`<memory>`
`<memory_resource>`(C++17)
`<scoped_allocator>`(C++11)
Metaprogramming
`<type_traits>`(C++11)
`<ratio>`(C++11)

General utilities
`<any>`(C++17)
`<bitset>`
`<bit>`(C++20)
`<charconv>`(C++17)
`<expected>`(C++23)
`<format>`(C++20)
`<functional>`
`<optional>`(C++17)
`<stdbit.h>`(C++26)
`<tuple>`(C++11)
`<typeindex>`(C++11)
`<utility>`
`<variant>`(C++17)
Containers
`<array>`(C++11)
`<deque>`
`<flat_map>`(C++23)
`<flat_set>`(C++23)
`<forward_list>`(C++11)
`<hive>`(C++26)
`<inplace_vector>`(C++26)
`<list>`
`<map>`
`<mdspan>`(C++23)
`<queue>`
`<set>`
`<span>`(C++20)
`<stack>`
`<unordered_map>`(C++11)
`<unordered_set>`(C++11)
`<vector>`
Iterators
`<iterator>`
Ranges
`<generator>`(C++23)
`<ranges>`(C++20)

Algorithms
`<algorithm>`
`<numeric>`
Strings
`<cctype>`
`<cstring>`
`<cuchar>`(C++11)
`<cwchar>`
`<cwctype>`
`<string_view>`(C++17)
`<string>`
Text processing
`<clocale>`
`<codecvt>`(C++11/17/26*)
`<locale>`
`<regex>`(C++11)
`<text_encoding>`(C++26)
Numerics
`<cfenv>`(C++11)
`<cmath>`
`<complex>`
`<linalg>`(C++26)
`<numbers>`(C++20)
`<random>`(C++11)
`<simd>`(C++26)
`<stdckdint.h>`(C++26)
`<valarray>`
Time
`<chrono>`(C++11)
`<ctime>`
C compatibility
`<ccomplex>`(C++11/17/20*)
`<ciso646>`(until C++20)
`<cstdalign>`(C++11/17/20*)
`<cstdbool>`(C++11/17/20*)
`<ctgmath>`(C++11/17/20*)

Input/output
`<cinttypes>`(C++11)
`<cstdio>`
`<filesystem>`(C++17)
`<fstream>`
`<iomanip>`
`<iosfwd>`
`<iostream>`
`<ios>`
`<istream>`
`<ostream>`
`<print>`(C++23)
`<spanstream>`(C++23)
`<sstream>`
`<streambuf>`
`<strstream>`(C++98/26*)
`<syncstream>`(C++20)
Concurrency support
`<atomic>`(C++11)
`<barrier>`(C++20)
`<condition_variable>`(C++11)
`<future>`(C++11)
`<hazard_pointer>`(C++26)
`<latch>`(C++20)
`<mutex>`(C++11)
`<rcu>`(C++26)
`<semaphore>`(C++20)
`<shared_mutex>`(C++14)
`<stdatomic.h>`(C++23)
`<stop_token>`(C++20)
`<thread>`(C++11)
Execution support
`<execution>`(C++17)

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Experimental library headers

ExecutionP2300

<experimental/execution>

Filesystem TS

<experimental/filesystem>

Parallelism TS (v1, v2)

`experimental/algorithm`
`experimental/execution_policy`
`experimental/exception_list`

`experimental/numeric`
`<experimental/simd>`
`experimental/task_block`

Library Fundamentals TS (v1, v2, v3)

`experimental/algorithm`
`<experimental/any>`
`experimental/array`
`experimental/chrono`
`experimental/deque`
`experimental/forward_list`
`<experimental/functional>`
`experimental/future`
`experimental/iterator`
`experimental/list`
`experimental/map`
`experimental/memory`
`<experimental/memory_resource>`
`experimental/numeric`
`<experimental/optional>`
`experimental/propagate_const`

`experimental/random`
`experimental/ratio`
`experimental/regex`
`experimental/scope`
`experimental/set`
`experimental/source_location`
`experimental/string`
`<experimental/string_view>`
`experimental/system_error`
`experimental/tuple`
`experimental/type_traits`
`experimental/unordered_map`
`experimental/unordered_set`
`experimental/utility`
`experimental/vector`

Concurrency TS

`experimental/atomic`
`experimental/barrier`

`experimental/future`
`experimental/latch`

Ranges TS

`<experimental/ranges/algorithm>`
`<experimental/ranges/concepts>`
`<experimental/ranges/functional>`
`<experimental/ranges/iterator>`

`<experimental/ranges/random>`
`<experimental/ranges/tuple>`
`<experimental/ranges/type_traits>`
`<experimental/ranges/utility>`

Coroutines TS

experimental/coroutine

Networking TS

`experimental/buffer`
`experimental/executor`
`experimental/internet`
`experimental/io_context`

`<experimental/net>`
`experimental/netfwd`
`experimental/socket`
`experimental/timer`

Reflection TS

<experimental/reflect>

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This header is part of the Library Fundamentals TS (v1,v2,v3).

[edit]Classes

Defined in namespace`std::experimental::pmr`
memory_resource	an abstract interface for classes that encapsulate memory resources (class)
synchronized_pool_resource	a thread-safememory_resource for managing allocations in pools of different block sizes (class)
unsynchronized_pool_resource	a thread-unsafememory_resource for managing allocations in pools of different block sizes (class)
monotonic_buffer_resource	a special-purposememory_resource that releases the allocated memory only when the resource is destroyed (class)
polymorphic_allocator	an allocator that supports run-time polymorphism based on thememory_resource it is constructed with (class template)
resource_adaptor	adapts an allocator into amemory_resource (alias template)

[edit]Functions

Defined in namespace`std::experimental::pmr`
Comparison
operator==operator!=	compare two`memory_resource`s (function)[edit]
operator==operator!=	compares two allocators (function template)[edit]
Global memory resources
new_delete_resource	returns a static program-wide`memory_resource` that uses the globaloperator new andoperator delete to allocate and deallocate memory (function)[edit]
null_memory_resource	returns a static`memory_resource` that performs no allocation (function)[edit]
Default memory resource
get_default_resource	gets the default`memory_resource` (function)[edit]
set_default_resource	sets the default`memory_resource` (function)[edit]

[edit]Synopsis

namespace std{namespace experimental{inlinenamespace fundamentals_v1{namespace pmr{ class memory_resource; bool operator==(const memory_resource& a,const memory_resource& b)noexcept;bool operator!=(const memory_resource& a,const memory_resource& b)noexcept; template<class Tp>class polymorphic_allocator; template<class T1,class T2>bool operator==(const polymorphic_allocator<T1>& a,const polymorphic_allocator<T2>& b)noexcept;template<class T1,class T2>bool operator!=(const polymorphic_allocator<T1>& a,const polymorphic_allocator<T2>& b)noexcept; // The name resource_adaptor_imp is for exposition only.template<class Allocator>class resource_adaptor_imp; template<class Allocator>using resource_adaptor= resource_adaptor_imp<typename allocator_traits<Allocator>::template rebind_alloc<char>>; // Global memory resources  memory_resource* new_delete_resource()noexcept;  memory_resource* null_memory_resource()noexcept; // The default memory resource  memory_resource* set_default_resource(memory_resource* r)noexcept;  memory_resource* get_default_resource()noexcept; // Standard memory resourcesstruct pool_options;class synchronized_pool_resource;class unsynchronized_pool_resource;class monotonic_buffer_resource; }// namespace pmr}// namespace fundamentals_v1}// namespace experimental}// namespace std