cereal
A C++11 library for serialization
static_object.hpp
Go to the documentation of this file.
1 
4 /*
5  Copyright (c) 2014, Randolph Voorhies, Shane Grant
6  All rights reserved.
7  Redistribution and use in source and binary forms, with or without
8  modification, are permitted provided that the following conditions are met:
9  * Redistributions of source code must retain the above copyright
10  notice, this list of conditions and the following disclaimer.
11  * Redistributions in binary form must reproduce the above copyright
12  notice, this list of conditions and the following disclaimer in the
13  documentation and/or other materials provided with the distribution.
14  * Neither the name of cereal nor the
15  names of its contributors may be used to endorse or promote products
16  derived from this software without specific prior written permission.
17  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
18  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20  DISCLAIMED. IN NO EVENT SHALL RANDOLPH VOORHIES OR SHANE GRANT BE LIABLE FOR ANY
21  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
26  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28 #ifndef CEREAL_DETAILS_STATIC_OBJECT_HPP_
29 #define CEREAL_DETAILS_STATIC_OBJECT_HPP_
30 
32 
41 #ifdef _MSC_VER
42 # define CEREAL_DLL_EXPORT __declspec(dllexport)
43 # define CEREAL_USED
44 #else // clang or gcc
45 # define CEREAL_DLL_EXPORT
46 # define CEREAL_USED __attribute__ ((__used__))
47 #endif
48 
49 namespace cereal
50 {
51  namespace detail
52  {
54 
60  template <class T>
62  {
63  private:
65  static void instantiate( T const & ) {}
66 
67  static T & create()
68  {
69  static T t;
70  instantiate(instance);
71  return t;
72  }
73 
74  StaticObject( StaticObject const & /*other*/ ) {}
75 
76  public:
77  static T & getInstance()
78  {
79  return create();
80  }
81 
82  private:
83  static T & instance;
84  };
85 
86  template <class T> T & StaticObject<T>::instance = StaticObject<T>::create();
87  } // namespace detail
88 } // namespace cereal
89 
90 #endif // CEREAL_DETAILS_STATIC_OBJECT_HPP_
Definition: access.hpp:39
#define CEREAL_DLL_EXPORT
Prevent link optimization from removing non-referenced static objects.
Definition: static_object.hpp:45
A static, pre-execution object.
Definition: static_object.hpp:61