Standard library header <experimental/memory_resource>

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Technical Specifications

Standard Library header files

Language Support
<cstddef> <limits> <climits> <contract>	<cfloat> <cstdint> <new> <version>	<typeinfo> <exception> <initializer_list>	<csignal> <csetjmp> <cstdarg>
Concepts
<concepts>
Diagnostics
<stdexcept>	<cassert>	<cerrno>	<system_error>
General utilities
<utility> <memory> <memory_resource> <scoped_allocator> <compare>	<bitset> <tuple> <optional> <any> <variant>	<type_traits> <ratio> <chrono> <typeindex> <functional>	<ctime> <cstdlib>
Strings
<string> <string_view>	<cctype> <cwctype>	<cwchar> <cuchar>	<cstring> <charconv>
Localization
<locale>	<codecvt>	<clocale>
Containers
<span> <array> <vector>	<deque> <forward_list> <list>	<map> <set> <queue>	<unordered_map> <unordered_set> <stack>
Iterators
<iterator>
Algorithms
<algorithm>	<execution>
Numerics
<complex> <random>	<valarray> <numeric>	<cfenv> <cmath>	<bit>
Input/Output
<iosfwd> <ios> <iomanip> <streambuf>	<istream> <ostream> <iostream>	<sstream> <fstream> <syncstream>	<cstdio> <cinttypes> <strstream>
Regular expressions
<regex>
Filesystem support
<filesystem>
Thread support
<thread> <atomic>	<mutex> <shared_mutex>	<condition_variable> <future>
C compatibility
<ciso646> <cstdalign>	<cstdbool> <ccomplex>	<ctgmath>

This header is part of the experimental library.

Classes

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

Functions

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

Synopsis

namespace std {
namespace experimental {
inline namespace 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 resources
  struct pool_options;
  class synchronized_pool_resource;
  class unsynchronized_pool_resource;
  class monotonic_buffer_resource;

} // namespace pmr
} // namespace fundamentals_v1
} // namespace experimental
} // namespace std