Diligent Engine API Reference: D:/GitHub/DiligentEngine/DiligentCore/Common/interface/UniqueIdentifier.h Source File

Diligent Engine API Reference

UniqueIdentifier.h
1 /* Copyright 2015-2018 Egor Yusov
2 *
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
10 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
11 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF ANY PROPRIETARY RIGHTS.
12 *
13 * In no event and under no legal theory, whether in tort (including negligence),
14 * contract, or otherwise, unless required by applicable law (such as deliberate
15 * and grossly negligent acts) or agreed to in writing, shall any Contributor be
16 * liable for any damages, including any direct, indirect, special, incidental,
17 * or consequential damages of any character arising as a result of this License or
18 * out of the use or inability to use the software (including but not limited to damages
19 * for loss of goodwill, work stoppage, computer failure or malfunction, or any and
20 * all other commercial damages or losses), even if such Contributor has been advised
21 * of the possibility of such damages.
22 */
23
24 #pragma once
25
26 #include "Atomics.h"
27
28 namespace Diligent
29 {
30 typedef Atomics::Long UniqueIdentifier;
31
32 // Template switch is used to have distinct counters
33 // for unrelated groups of objects
34 template<typename ObjectsClass>
35 class UniqueIdHelper
36 {
37 public:
38 UniqueIdHelper() :
39 m_ID(0),
40 m_bIsInitialized( false )
41 {}
42
43 UniqueIdHelper( UniqueIdHelper&& RHS) :
44 m_ID( RHS.m_ID ),
45 m_bIsInitialized( RHS.m_bIsInitialized )
46 {
47 RHS.m_ID = 0;
48 RHS.m_bIsInitialized = false;
49 }
50
51 const UniqueIdHelper& operator = (UniqueIdHelper&& RHS)
52 {
53 m_ID = RHS.m_ID;
54 m_bIsInitialized = RHS.m_bIsInitialized;
55 RHS.m_ID = 0;
56 RHS.m_bIsInitialized = false;
57
58 return *this;
59 }
60
61 UniqueIdentifier GetID()const
62 {
63 if( !m_bIsInitialized )
64 {
65 static Atomics::AtomicLong sm_GlobalCounter;
66 m_ID = Atomics::AtomicIncrement(sm_GlobalCounter);
67 m_bIsInitialized = true;
68 }
69 return m_ID;
70 }
71
72 private:
73 UniqueIdHelper( const UniqueIdHelper& );
74 const UniqueIdHelper& operator = ( const UniqueIdHelper& );
75
76 mutable UniqueIdentifier m_ID;
77 mutable bool m_bIsInitialized;
78 };
79 }
Diligent
Namespace for the OpenGL implementation of the graphics engine.
Definition: BufferD3D11Impl.h:34