1// -*- C++ -*- 2//===----------------------------- new ------------------------------------===// 3// 4// The LLVM Compiler Infrastructure 5// 6// This file is dual licensed under the MIT and the University of Illinois Open 7// Source Licenses. See LICENSE.TXT for details. 8// 9//===----------------------------------------------------------------------===// 10 11#ifndef _LIBCPP_NEW 12#define _LIBCPP_NEW 13 14/* 15 new synopsis 16 17namespace std 18{ 19 20class bad_alloc 21 : public exception 22{ 23public: 24 bad_alloc() noexcept; 25 bad_alloc(const bad_alloc&) noexcept; 26 bad_alloc& operator=(const bad_alloc&) noexcept; 27 virtual const char* what() const noexcept; 28}; 29 30class bad_array_length : public bad_alloc // FIXME: Not part of C++ 31{ 32public: 33 bad_array_length() noexcept; 34}; 35 36class bad_array_new_length : public bad_alloc // C++14 37{ 38public: 39 bad_array_new_length() noexcept; 40}; 41 42enum class align_val_t : size_t {}; // C++17 43struct nothrow_t {}; 44extern const nothrow_t nothrow; 45typedef void (*new_handler)(); 46new_handler set_new_handler(new_handler new_p) noexcept; 47new_handler get_new_handler() noexcept; 48 49} // std 50 51void* operator new(std::size_t size); // replaceable 52void* operator new(std::size_t size, std::align_val_t alignment); // replaceable, C++17 53void* operator new(std::size_t size, const std::nothrow_t&) noexcept; // replaceable 54void* operator new(std::size_t size, std::align_val_t alignment, 55 const std::nothrow_t&) noexcept; // replaceable, C++17 56void operator delete(void* ptr) noexcept; // replaceable 57void operator delete(void* ptr, std::size_t size) noexcept; // replaceable, C++14 58void operator delete(void* ptr, std::align_val_t alignment) noexcept; // replaceable, C++17 59void operator delete(void* ptr, std::size_t size, 60 std::align_val_t alignment) noexcept; // replaceable, C++17 61void operator delete(void* ptr, const std::nothrow_t&) noexcept; // replaceable 62void operator delete(void* ptr, std:align_val_t alignment, 63 const std::nothrow_t&) noexcept; // replaceable, C++17 64 65void* operator new[](std::size_t size); // replaceable 66void* operator new[](std::size_t size, 67 std::align_val_t alignment) noexcept; // replaceable, C++17 68void* operator new[](std::size_t size, const std::nothrow_t&) noexcept; // replaceable 69void* operator new[](std::size_t size, std::align_val_t alignment, 70 const std::nothrow_t&) noexcept; // replaceable, C++17 71void operator delete[](void* ptr) noexcept; // replaceable 72void operator delete[](void* ptr, std::size_t size) noexcept; // replaceable, C++14 73void operator delete[](void* ptr, 74 std::align_val_t alignment) noexcept; // replaceable, C++17 75void operator delete[](void* ptr, std::size_t size, 76 std::align_val_t alignment) noexcept; // replaceable, C++17 77void operator delete[](void* ptr, const std::nothrow_t&) noexcept; // replaceable 78void operator delete[](void* ptr, std::align_val_t alignment, 79 const std::nothrow_t&) noexcept; // replaceable, C++17 80 81void* operator new (std::size_t size, void* ptr) noexcept; 82void* operator new[](std::size_t size, void* ptr) noexcept; 83void operator delete (void* ptr, void*) noexcept; 84void operator delete[](void* ptr, void*) noexcept; 85 86*/ 87 88#include <__config> 89#include <exception> 90#include <cstddef> 91#ifdef _LIBCPP_NO_EXCEPTIONS 92#include <cstdlib> 93#endif 94 95#include <__undef___deallocate> 96 97#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 98#pragma GCC system_header 99#endif 100 101#if !(defined(_LIBCPP_BUILDING_NEW) || _LIBCPP_STD_VER >= 14 || \ 102 (defined(__cpp_sized_deallocation) && __cpp_sized_deallocation >= 201309)) 103# define _LIBCPP_HAS_NO_SIZED_DEALLOCATION 104#endif 105 106#if !(defined(_LIBCPP_BUILDING_NEW) || _LIBCPP_STD_VER > 14 || \ 107 (defined(__cpp_aligned_new) && __cpp_aligned_new >= 201606)) 108# define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION 109#endif 110 111namespace std // purposefully not using versioning namespace 112{ 113 114class _LIBCPP_EXCEPTION_ABI bad_alloc 115 : public exception 116{ 117public: 118 bad_alloc() _NOEXCEPT; 119 virtual ~bad_alloc() _NOEXCEPT; 120 virtual const char* what() const _NOEXCEPT; 121}; 122 123class _LIBCPP_EXCEPTION_ABI bad_array_new_length 124 : public bad_alloc 125{ 126public: 127 bad_array_new_length() _NOEXCEPT; 128 virtual ~bad_array_new_length() _NOEXCEPT; 129 virtual const char* what() const _NOEXCEPT; 130}; 131 132_LIBCPP_NORETURN _LIBCPP_FUNC_VIS void __throw_bad_alloc(); // not in C++ spec 133 134#if defined(_LIBCPP_BUILDING_NEW) || (_LIBCPP_STD_VER > 11) 135 136class _LIBCPP_EXCEPTION_ABI bad_array_length 137 : public bad_alloc 138{ 139public: 140 bad_array_length() _NOEXCEPT; 141 virtual ~bad_array_length() _NOEXCEPT; 142 virtual const char* what() const _NOEXCEPT; 143}; 144 145#define _LIBCPP_BAD_ARRAY_LENGTH_DEFINED 146 147#endif // defined(_LIBCPP_BUILDING_NEW) || (_LIBCPP_STD_VER > 11) 148 149#ifndef _LIBCPP_HAS_NO_ALIGNED_ALLOCATION 150#ifndef _LIBCPP_CXX03_LANG 151enum class _LIBCPP_ENUM_VIS align_val_t : size_t { }; 152#else 153enum align_val_t { __zero = 0, __max = (size_t)-1 }; 154#endif 155#endif 156 157struct _LIBCPP_TYPE_VIS nothrow_t {}; 158extern _LIBCPP_FUNC_VIS const nothrow_t nothrow; 159typedef void (*new_handler)(); 160_LIBCPP_FUNC_VIS new_handler set_new_handler(new_handler) _NOEXCEPT; 161_LIBCPP_FUNC_VIS new_handler get_new_handler() _NOEXCEPT; 162 163} // std 164 165#if !__has_feature(cxx_noexcept) 166#define _THROW_BAD_ALLOC throw(std::bad_alloc) 167#else 168#define _THROW_BAD_ALLOC 169#endif 170 171_LIBCPP_OVERRIDABLE_FUNC_VIS void* operator new(std::size_t __sz) _THROW_BAD_ALLOC; 172_LIBCPP_OVERRIDABLE_FUNC_VIS void* operator new(std::size_t __sz, const std::nothrow_t&) _NOEXCEPT _NOALIAS; 173_LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete(void* __p) _NOEXCEPT; 174_LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete(void* __p, const std::nothrow_t&) _NOEXCEPT; 175#ifndef _LIBCPP_HAS_NO_SIZED_DEALLOCATION 176_LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete(void* __p, std::size_t __sz) _NOEXCEPT; 177#endif 178 179_LIBCPP_OVERRIDABLE_FUNC_VIS void* operator new[](std::size_t __sz) _THROW_BAD_ALLOC; 180_LIBCPP_OVERRIDABLE_FUNC_VIS void* operator new[](std::size_t __sz, const std::nothrow_t&) _NOEXCEPT _NOALIAS; 181_LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete[](void* __p) _NOEXCEPT; 182_LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete[](void* __p, const std::nothrow_t&) _NOEXCEPT; 183#ifndef _LIBCPP_HAS_NO_SIZED_DEALLOCATION 184_LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete[](void* __p, std::size_t __sz) _NOEXCEPT; 185#endif 186 187#ifndef _LIBCPP_HAS_NO_ALIGNED_ALLOCATION 188_LIBCPP_OVERRIDABLE_FUNC_VIS void* operator new(std::size_t __sz, std::align_val_t) _THROW_BAD_ALLOC; 189_LIBCPP_OVERRIDABLE_FUNC_VIS void* operator new(std::size_t __sz, std::align_val_t, const std::nothrow_t&) _NOEXCEPT _NOALIAS; 190_LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete(void* __p, std::align_val_t) _NOEXCEPT; 191_LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete(void* __p, std::align_val_t, const std::nothrow_t&) _NOEXCEPT; 192#ifndef _LIBCPP_HAS_NO_SIZED_DEALLOCATION 193_LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete(void* __p, std::size_t __sz, std::align_val_t) _NOEXCEPT; 194#endif 195 196_LIBCPP_OVERRIDABLE_FUNC_VIS void* operator new[](std::size_t __sz, std::align_val_t) _THROW_BAD_ALLOC; 197_LIBCPP_OVERRIDABLE_FUNC_VIS void* operator new[](std::size_t __sz, std::align_val_t, const std::nothrow_t&) _NOEXCEPT _NOALIAS; 198_LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete[](void* __p, std::align_val_t) _NOEXCEPT; 199_LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete[](void* __p, std::align_val_t, const std::nothrow_t&) _NOEXCEPT; 200#ifndef _LIBCPP_HAS_NO_SIZED_DEALLOCATION 201_LIBCPP_OVERRIDABLE_FUNC_VIS void operator delete[](void* __p, std::size_t __sz, std::align_val_t) _NOEXCEPT; 202#endif 203#endif 204 205inline _LIBCPP_INLINE_VISIBILITY void* operator new (std::size_t, void* __p) _NOEXCEPT {return __p;} 206inline _LIBCPP_INLINE_VISIBILITY void* operator new[](std::size_t, void* __p) _NOEXCEPT {return __p;} 207inline _LIBCPP_INLINE_VISIBILITY void operator delete (void*, void*) _NOEXCEPT {} 208inline _LIBCPP_INLINE_VISIBILITY void operator delete[](void*, void*) _NOEXCEPT {} 209 210_LIBCPP_BEGIN_NAMESPACE_STD 211 212inline _LIBCPP_INLINE_VISIBILITY void *__allocate(size_t __size) { 213#ifdef _LIBCPP_HAS_NO_BUILTIN_OPERATOR_NEW_DELETE 214 return ::operator new(__size); 215#else 216 return __builtin_operator_new(__size); 217#endif 218} 219 220inline _LIBCPP_INLINE_VISIBILITY void __deallocate(void *__ptr) { 221#ifdef _LIBCPP_HAS_NO_BUILTIN_OPERATOR_NEW_DELETE 222 ::operator delete(__ptr); 223#else 224 __builtin_operator_delete(__ptr); 225#endif 226} 227 228#ifdef _LIBCPP_BAD_ARRAY_LENGTH_DEFINED 229_LIBCPP_NORETURN inline _LIBCPP_ALWAYS_INLINE 230void __throw_bad_array_length() 231{ 232#ifndef _LIBCPP_NO_EXCEPTIONS 233 throw bad_array_length(); 234#else 235 _VSTD::abort(); 236#endif 237} 238#endif 239 240_LIBCPP_END_NAMESPACE_STD 241 242#endif // _LIBCPP_NEW 243