This header is part of the dynamic memory management library, in particular provides low level memory management features.
Classes |
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| exception thrown when memory allocation fails (class) |
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(C++11) | exception thrown on allocation of array with invalid length (class) |
| tag type used to select a non-throwing allocation function (class) |
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(C++17) | type used to pass alignment to alignment-aware allocation and deallocation functions (enum) |
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(C++20) | tag type used to identify destroying-delete overloads of operator delete (class) |
Types |
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| function pointer type of the new handler (typedef) |
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Constants |
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an object of type nothrow_t used to select a non-throwing allocation function (constant) |
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(C++20) | an object of type std::destroying_delete_t used to select destroying-delete overloads of operator delete (constant) |
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(C++17) | min offset to avoid false sharing max offset to promote true sharing (constant) |
Functions |
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| allocation functions (function) |
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| deallocation functions (function) |
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(C++11) | obtains the current new handler (function) |
| registers a new handler (function) |
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(C++17) | pointer optimization barrier (function template) |
namespace std {
// storage allocation errors
class bad_alloc;
class bad_array_new_length;
struct destroying_delete_t {
explicit destroying_delete_t() = default;
};
inline constexpr destroying_delete_t destroying_delete{};
// global operator new control
enum class align_val_t : size_t {};
struct nothrow_t { explicit nothrow_t() = default; };
extern const nothrow_t nothrow;
using new_handler = void (*)();
new_handler get_new_handler() noexcept;
new_handler set_new_handler(new_handler new_p) noexcept;
// pointer optimization barrier
template<class T> [[nodiscard]] constexpr T* launder(T* p) noexcept;
// hardware interference size
inline constexpr size_t hardware_destructive_interference_size =
/* implementation-defined */;
inline constexpr size_t hardware_constructive_interference_size =
/* implementation-defined */;
}
// storage allocation and deallocation
[[nodiscard]] void* operator new(std::size_t size);
[[nodiscard]] void* operator new(std::size_t size, std::align_val_t alignment);
[[nodiscard]] void* operator new(std::size_t size, const std::nothrow_t&) noexcept;
[[nodiscard]] void* operator new(std::size_t size, std::align_val_t alignment,
const std::nothrow_t&) noexcept;
void operator delete(void* ptr) noexcept;
void operator delete(void* ptr, std::size_t size) noexcept;
void operator delete(void* ptr, std::align_val_t alignment) noexcept;
void operator delete(void* ptr, std::size_t size, std::align_val_t alignment) noexcept;
void operator delete(void* ptr, const std::nothrow_t&) noexcept;
void operator delete(void* ptr, std::align_val_t alignment,
const std::nothrow_t&) noexcept;
[[nodiscard]] void* operator new[](std::size_t size);
[[nodiscard]] void* operator new[](std::size_t size, std::align_val_t alignment);
[[nodiscard]] void* operator new[](std::size_t size, const std::nothrow_t&) noexcept;
[[nodiscard]] void* operator new[](std::size_t size, std::align_val_t alignment,
const std::nothrow_t&) noexcept;
void operator delete[](void* ptr) noexcept;
void operator delete[](void* ptr, std::size_t size) noexcept;
void operator delete[](void* ptr, std::align_val_t alignment) noexcept;
void operator delete[](void* ptr, std::size_t size, std::align_val_t alignment) noexcept;
void operator delete[](void* ptr, const std::nothrow_t&) noexcept;
void operator delete[](void* ptr, std::align_val_t alignment,
const std::nothrow_t&) noexcept;
[[nodiscard]] void* operator new (std::size_t size, void* ptr) noexcept;
[[nodiscard]] void* operator new[](std::size_t size, void* ptr) noexcept;
void operator delete (void* ptr, void*) noexcept;
void operator delete[](void* ptr, void*) noexcept;
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