1 | |
2 | // |
3 | // This source file is part of appleseed. |
4 | // Visit http://appleseedhq.net/ for additional information and resources. |
5 | // |
6 | // This software is released under the MIT license. |
7 | // |
8 | // Copyright (c) 2010-2013 Francois Beaune, Jupiter Jazz Limited |
9 | // Copyright (c) 2014-2017 Francois Beaune, The appleseedhq Organization |
10 | // |
11 | // Permission is hereby granted, free of charge, to any person obtaining a copy |
12 | // of this software and associated documentation files (the "Software"), to deal |
13 | // in the Software without restriction, including without limitation the rights |
14 | // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
15 | // copies of the Software, and to permit persons to whom the Software is |
16 | // furnished to do so, subject to the following conditions: |
17 | // |
18 | // The above copyright notice and this permission notice shall be included in |
19 | // all copies or substantial portions of the Software. |
20 | // |
21 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
22 | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
23 | // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
24 | // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
25 | // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
26 | // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
27 | // THE SOFTWARE. |
28 | // |
29 | |
30 | #ifndef APPLESEED_FOUNDATION_UTILITY_UID_H |
31 | #define APPLESEED_FOUNDATION_UTILITY_UID_H |
32 | |
33 | // appleseed.foundation headers. |
34 | #include "foundation/core/concepts/noncopyable.h" |
35 | #include "foundation/platform/types.h" |
36 | |
37 | // appleseed.main headers. |
38 | #include "main/dllsymbol.h" |
39 | |
40 | namespace foundation |
41 | { |
42 | |
43 | // |
44 | // A unique identifier. |
45 | // |
46 | |
47 | typedef uint64 UniqueID; |
48 | |
49 | |
50 | // |
51 | // Format string for printing unique identifiers to strings. |
52 | // |
53 | |
54 | #define FMT_UNIQUE_ID FMT_UINT64 |
55 | |
56 | |
57 | // |
58 | // Base class for uniquely identifiable objects. |
59 | // |
60 | |
61 | class APPLESEED_DLLSYMBOL Identifiable |
62 | : public NonCopyable |
63 | { |
64 | public: |
65 | // Constructor, assigns a unique ID to this instance. |
66 | Identifiable(); |
67 | |
68 | // Return the unique ID of this object. |
69 | UniqueID get_uid() const; |
70 | |
71 | private: |
72 | const UniqueID m_unique_id; |
73 | }; |
74 | |
75 | |
76 | // |
77 | // This function generates identifiers that are unique within the process. |
78 | // |
79 | // Thread-safe. |
80 | // |
81 | |
82 | APPLESEED_DLLSYMBOL UniqueID new_guid(); |
83 | |
84 | |
85 | // |
86 | // Identifiable class implementation. |
87 | // |
88 | |
89 | inline Identifiable::Identifiable() |
90 | : m_unique_id(new_guid()) |
91 | { |
92 | } |
93 | |
94 | inline UniqueID Identifiable::get_uid() const |
95 | { |
96 | return m_unique_id; |
97 | } |
98 | |
99 | } // namespace foundation |
100 | |
101 | #endif // !APPLESEED_FOUNDATION_UTILITY_UID_H |
102 | |