43 #ifndef _GLIBCXX_MEMORY
44 #define _GLIBCXX_MEMORY 1
46 #pragma GCC system_header
69 #if __cplusplus >= 201103L
77 # include <bits/uses_allocator.h>
82 # include <bits/shared_ptr.h>
84 # if _GLIBCXX_USE_DEPRECATED
91 #if __cplusplus >= 201103L
93 # ifdef _GLIBCXX_USE_C99_STDINT_TR1
94 namespace std _GLIBCXX_VISIBILITY(default)
96 _GLIBCXX_BEGIN_NAMESPACE_VERSION
115 align(
size_t __align,
size_t __size,
void*& __ptr,
size_t& __space) noexcept
117 const auto __intptr =
reinterpret_cast<uintptr_t
>(__ptr);
118 const auto __aligned = (__intptr - 1u + __align) & -__align;
119 const auto __diff = __aligned - __intptr;
120 if ((__size + __diff) > __space)
125 return __ptr =
reinterpret_cast<void*
>(__aligned);
131 enum class pointer_safety { relaxed, preferred, strict };
134 declare_reachable(
void*) { }
136 template <
typename _Tp>
138 undeclare_reachable(_Tp* __p) {
return __p; }
141 declare_no_pointers(
char*,
size_t) { }
144 undeclare_no_pointers(
char*,
size_t) { }
146 inline pointer_safety
147 get_pointer_safety() noexcept {
return pointer_safety::relaxed; }
149 _GLIBCXX_END_NAMESPACE_VERSION
151 #endif // _GLIBCXX_USE_C99_STDINT_TR1
void * align(size_t __align, size_t __size, void *&__ptr, size_t &__space) noexcept
Fit aligned storage in buffer.