1 //===--------------------------- new.cpp ----------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #define _LIBCPP_BUILDING_NEW
16 #if defined(__APPLE__) && !defined(LIBCXXRT)
19 #ifndef _LIBCPPABI_VERSION
20 // On Darwin, there are two STL shared libraries and a lower level ABI
21 // shared library. The global holding the current new handler is
22 // in the ABI library and named __cxa_new_handler.
23 #define __new_handler __cxxabiapple::__cxa_new_handler
26 #if defined(LIBCXXRT) || defined(LIBCXX_BUILDING_LIBCXXABI)
28 #endif // defined(LIBCXX_BUILDING_LIBCXXABI)
29 #if !defined(_LIBCPPABI_VERSION) && !defined(__GLIBCXX__)
30 static std::new_handler __new_handler;
31 #endif // _LIBCPPABI_VERSION
36 // Implement all new and delete operators as weak definitions
37 // in this shared library, so that they can be overridden by programs
38 // that define non-weak copies of the functions.
42 operator new(std::size_t size) _THROW_BAD_ALLOC
47 while ((p = ::malloc(size)) == 0)
49 // If malloc fails and there is a new_handler,
50 // call it to try free up memory.
51 std::new_handler nh = std::get_new_handler();
55 #ifndef _LIBCPP_NO_EXCEPTIONS
56 throw std::bad_alloc();
66 operator new(std::size_t size, std::align_val_t alignment) _THROW_BAD_ALLOC
70 if (static_cast<size_t>(alignment) < sizeof(void*))
71 alignment = std::align_val_t(sizeof(void*));
74 while ((p = _aligned_malloc(size, static_cast<size_t>(alignment))) == nullptr)
76 while (::posix_memalign(&p, static_cast<size_t>(alignment), size) != 0)
79 // If posix_memalign fails and there is a new_handler,
80 // call it to try free up memory.
81 std::new_handler nh = std::get_new_handler();
85 #ifndef _LIBCPP_NO_EXCEPTIONS
86 throw std::bad_alloc();
88 p = nullptr; // posix_memalign doesn't initialize 'p' on failure
98 operator new(size_t size, const std::nothrow_t&) _NOEXCEPT
101 #ifndef _LIBCPP_NO_EXCEPTIONS
104 #endif // _LIBCPP_NO_EXCEPTIONS
105 p = ::operator new(size);
106 #ifndef _LIBCPP_NO_EXCEPTIONS
111 #endif // _LIBCPP_NO_EXCEPTIONS
117 operator new(size_t size, std::align_val_t alignment, const std::nothrow_t&) _NOEXCEPT
120 #ifndef _LIBCPP_NO_EXCEPTIONS
123 #endif // _LIBCPP_NO_EXCEPTIONS
124 p = ::operator new(size, alignment);
125 #ifndef _LIBCPP_NO_EXCEPTIONS
130 #endif // _LIBCPP_NO_EXCEPTIONS
136 operator new[](size_t size) _THROW_BAD_ALLOC
138 return ::operator new(size);
143 operator new[](size_t size, std::align_val_t alignment) _THROW_BAD_ALLOC
145 return ::operator new(size, alignment);
150 operator new[](size_t size, const std::nothrow_t&) _NOEXCEPT
153 #ifndef _LIBCPP_NO_EXCEPTIONS
156 #endif // _LIBCPP_NO_EXCEPTIONS
157 p = ::operator new[](size);
158 #ifndef _LIBCPP_NO_EXCEPTIONS
163 #endif // _LIBCPP_NO_EXCEPTIONS
169 operator new[](size_t size, std::align_val_t alignment, const std::nothrow_t&) _NOEXCEPT
172 #ifndef _LIBCPP_NO_EXCEPTIONS
175 #endif // _LIBCPP_NO_EXCEPTIONS
176 p = ::operator new[](size, alignment);
177 #ifndef _LIBCPP_NO_EXCEPTIONS
182 #endif // _LIBCPP_NO_EXCEPTIONS
188 operator delete(void* ptr) _NOEXCEPT
196 operator delete(void* ptr, std::align_val_t) _NOEXCEPT
204 operator delete(void* ptr, const std::nothrow_t&) _NOEXCEPT
206 ::operator delete(ptr);
211 operator delete(void* ptr, std::align_val_t alignment, const std::nothrow_t&) _NOEXCEPT
213 ::operator delete(ptr, alignment);
218 operator delete(void* ptr, size_t) _NOEXCEPT
220 ::operator delete(ptr);
225 operator delete(void* ptr, size_t, std::align_val_t alignment) _NOEXCEPT
227 ::operator delete(ptr, alignment);
232 operator delete[] (void* ptr) _NOEXCEPT
234 ::operator delete(ptr);
239 operator delete[] (void* ptr, std::align_val_t alignment) _NOEXCEPT
241 ::operator delete(ptr, alignment);
246 operator delete[] (void* ptr, const std::nothrow_t&) _NOEXCEPT
248 ::operator delete[](ptr);
253 operator delete[] (void* ptr, std::align_val_t alignment, const std::nothrow_t&) _NOEXCEPT
255 ::operator delete[](ptr, alignment);
260 operator delete[] (void* ptr, size_t) _NOEXCEPT
262 ::operator delete[](ptr);
267 operator delete[] (void* ptr, size_t, std::align_val_t alignment) _NOEXCEPT
269 ::operator delete[](ptr, alignment);
272 #endif // !__GLIBCXX__
278 const nothrow_t nothrow = {};
281 #ifndef _LIBCPPABI_VERSION
286 set_new_handler(new_handler handler) _NOEXCEPT
288 return __sync_lock_test_and_set(&__new_handler, handler);
292 get_new_handler() _NOEXCEPT
294 return __sync_fetch_and_add(&__new_handler, nullptr);
297 #endif // !__GLIBCXX__
301 bad_alloc::bad_alloc() _NOEXCEPT
307 bad_alloc::~bad_alloc() _NOEXCEPT
312 bad_alloc::what() const _NOEXCEPT
314 return "std::bad_alloc";
317 #endif // !__GLIBCXX__
319 bad_array_new_length::bad_array_new_length() _NOEXCEPT
325 bad_array_new_length::~bad_array_new_length() _NOEXCEPT
330 bad_array_new_length::what() const _NOEXCEPT
332 return "bad_array_new_length";
335 #endif // !__GLIBCXX__
339 bad_array_length::bad_array_length() _NOEXCEPT
345 bad_array_length::~bad_array_length() _NOEXCEPT
350 bad_array_length::what() const _NOEXCEPT
352 return "bad_array_length";
355 #endif // !__GLIBCXX__
357 #endif // _LIBCPPABI_VERSION
364 #ifndef _LIBCPP_NO_EXCEPTIONS