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allocator_base.hpp
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1 /*******************************************************************************
2  * tlx/allocator_base.hpp
3  *
4  * Part of tlx - http://panthema.net/tlx
5  *
6  * Copyright (C) 2015 Timo Bingmann <[email protected]>
7  *
8  * All rights reserved. Published under the Boost Software License, Version 1.0
9  ******************************************************************************/
10 
11 #ifndef TLX_ALLOCATOR_BASE_HEADER
12 #define TLX_ALLOCATOR_BASE_HEADER
13 
14 #include <cstddef>
15 #include <memory>
16 #include <type_traits>
17 
18 namespace tlx {
19 
20 template <typename Type>
22 {
23  static constexpr bool debug = true;
24 
25 public:
26  using value_type = Type;
27  using pointer = Type *;
28  using const_pointer = const Type *;
29  using reference = Type &;
30  using const_reference = const Type &;
31  using size_type = std::size_t;
32  using difference_type = std::ptrdiff_t;
33 
34  //! C++11 type flag
35  using is_always_equal = std::true_type;
36  //! C++11 type flag
38 
39  //! Returns the address of x.
40  pointer address(reference x) const noexcept {
41  return std::addressof(x);
42  }
43 
44  //! Returns the address of x.
46  return std::addressof(x);
47  }
48 
49  //! Maximum size possible to allocate
50  size_type max_size() const noexcept {
51  return size_t(-1) / sizeof(Type);
52  }
53 
54  //! Constructs an element object on the location pointed by p.
56  ::new (static_cast<void*>(p))Type(value); // NOLINT
57  }
58 
59 #if defined(_MSC_VER)
60 // disable false-positive warning C4100: 'p': unreferenced formal parameter
61 #pragma warning(push)
62 #pragma warning(disable:4100)
63 #endif
64  //! Destroys in-place the object pointed by p.
65  void destroy(pointer p) const noexcept {
66  p->~Type();
67  }
68 #if defined(_MSC_VER)
69 #pragma warning(push)
70 #endif
71 
72  //! Constructs an element object on the location pointed by p.
73  template <typename SubType, typename... Args>
74  void construct(SubType* p, Args&& ... args) {
75  ::new (static_cast<void*>(p))SubType(std::forward<Args>(args) ...); // NOLINT
76  }
77 
78  //! Destroys in-place the object pointed by p.
79  template <typename SubType>
80  void destroy(SubType* p) const noexcept {
81  p->~SubType();
82  }
83 };
84 
85 } // namespace tlx
86 
87 #endif // !TLX_ALLOCATOR_BASE_HEADER
88 
89 /******************************************************************************/
const_pointer address(const_reference x) const noexcept
Returns the address of x.
void destroy(pointer p) const noexcept
Destroys in-place the object pointed by p.
std::true_type propagate_on_container_move_assignment
C++11 type flag.
Type
VFS object type.
Definition: file_io.hpp:52
void construct(pointer p, const_reference value)
Constructs an element object on the location pointed by p.
list x
Definition: gen_data.py:39
std::true_type is_always_equal
C++11 type flag.
int value
Definition: gen_data.py:41
void construct(SubType *p, Args &&...args)
Constructs an element object on the location pointed by p.
size_type max_size() const noexcept
Maximum size possible to allocate.
void destroy(SubType *p) const noexcept
Destroys in-place the object pointed by p.
static constexpr bool debug
pointer address(reference x) const noexcept
Returns the address of x.