tiny_dnn  1.0.0
A header only, dependency-free deep learning framework in C++11
aligned_allocator.h
1 /*
2  Copyright (c) 2016, Taiga Nomi
3  All rights reserved.
4 
5  Redistribution and use in source and binary forms, with or without
6  modification, are permitted provided that the following conditions are met:
7  * Redistributions of source code must retain the above copyright
8  notice, this list of conditions and the following disclaimer.
9  * Redistributions in binary form must reproduce the above copyright
10  notice, this list of conditions and the following disclaimer in the
11  documentation and/or other materials provided with the distribution.
12  * Neither the name of the <organization> nor the
13  names of its contributors may be used to endorse or promote products
14  derived from this software without specific prior written permission.
15 
16  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
17  EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
20  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27 #pragma once
28 #include <stdlib.h>
29 #ifdef _WIN32
30 #include <malloc.h>
31 #endif
32 #ifdef __MINGW32__
33 #include <mm_malloc.h>
34 #endif
35 #include "nn_error.h"
36 
37 namespace tiny_dnn {
38 
39 template <typename T, std::size_t alignment>
41 public:
42  typedef T value_type;
43  typedef T* pointer;
44  typedef std::size_t size_type;
45  typedef std::ptrdiff_t difference_type;
46  typedef T& reference;
47  typedef const T& const_reference;
48  typedef const T* const_pointer;
49 
50  template <typename U>
51  struct rebind {
53  };
54 
56 
57  template <typename U>
59 
60  const_pointer address(const_reference value) const {
61  return std::addressof(value);
62  }
63 
64  pointer address(reference value) const {
65  return std::addressof(value);
66  }
67 
68  pointer allocate(size_type size, const void* = nullptr) {
69  void* p = aligned_alloc(alignment, sizeof(T) * size);
70  if (!p && size > 0)
71  throw nn_error("failed to allocate");
72  return static_cast<pointer>(p);
73  }
74 
75  size_type max_size() const {
76  return ~static_cast<std::size_t>(0) / sizeof(T);
77  }
78 
79  void deallocate(pointer ptr, size_type) {
80  aligned_free(ptr);
81  }
82 
83  template<class U, class V>
84  void construct(U* ptr, const V& value) {
85  void* p = ptr;
86  ::new(p) U(value);
87  }
88 
89 #if defined(_MSC_VER) && _MSC_VER <= 1800
90  // -vc2013 doesn't support variadic templates
91 #else
92  template<class U, class... Args>
93  void construct(U* ptr, Args&&... args) {
94  void* p = ptr;
95  ::new(p) U(std::forward<Args>(args)...);
96  }
97 #endif
98 
99  template<class U>
100  void construct(U* ptr) {
101  void* p = ptr;
102  ::new(p) U();
103  }
104 
105  template<class U>
106  void destroy(U* ptr) {
107  ptr->~U();
108  }
109 
110 private:
111  void* aligned_alloc(size_type align, size_type size) const {
112 #if defined(_MSC_VER)
113  return ::_aligned_malloc(size, align);
114 #elif defined (__ANDROID__)
115  return ::memalign(align, size);
116 #elif defined (__MINGW32__)
117  return ::_mm_malloc(size, align);
118 #else // posix assumed
119  void* p;
120  if (::posix_memalign(&p, align, size) != 0) {
121  p = 0;
122  }
123  return p;
124 #endif
125  }
126 
127  void aligned_free(pointer ptr) {
128 #if defined(_MSC_VER)
129  ::_aligned_free(ptr);
130 #elif defined(__MINGW32__)
131  ::_mm_free(ptr);
132 #else
133  ::free(ptr);
134 #endif
135  }
136 };
137 
138 template<typename T1, typename T2, std::size_t alignment>
139 inline bool operator==(const aligned_allocator<T1, alignment>&, const aligned_allocator<T2, alignment>&)
140 {
141  return true;
142 }
143 
144 template<typename T1, typename T2, std::size_t alignment>
145 inline bool operator!=(const aligned_allocator<T1, alignment>&, const aligned_allocator<T2, alignment>&)
146 {
147  return false;
148 }
149 }
Definition: aligned_allocator.h:40
Definition: aligned_allocator.h:51