1 /*
2 -----------------------------------------------------------------------------
3 This source file is part of OGRE
4     (Object-oriented Graphics Rendering Engine)
5 For the latest info, see http://www.ogre3d.org/
6 
7 Copyright (c) 2000-2013 Torus Knot Software Ltd
8 
9 Permission is hereby granted, free of charge, to any person obtaining a copy
10 of this software and associated documentation files (the "Software"), to deal
11 in the Software without restriction, including without limitation the rights
12 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
13 copies of the Software, and to permit persons to whom the Software is
14 furnished to do so, subject to the following conditions:
15 
16 The above copyright notice and this permission notice shall be included in
17 all copies or substantial portions of the Software.
18 
19 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
22 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25 THE SOFTWARE.
26 -----------------------------------------------------------------------------
27 */
28 #ifndef __AtomicObject_H__
29 #define __AtomicObject_H__
30 
31 #include <signal.h>
32 #include "OgrePrerequisites.h"
33 #include "Threading/OgreThreadHeaders.h"
34 
35 namespace Ogre {
36 
37 	/** \addtogroup Core
38 	*  @{
39 	*/
40 	/** \addtogroup General
41 	*  @{
42 	*/
43     template <class T> class AtomicObject {
44 
45         public:
46 
AtomicObject(const T & initial)47         AtomicObject (const T &initial)
48             : mField(initial)
49         {   }
50 
AtomicObject(const AtomicObject<T> & cousin)51         AtomicObject (const AtomicObject<T> &cousin)
52             : mField(cousin.get())
53         {   }
54 
AtomicObject()55         AtomicObject ()
56         {   }
57 
58         void operator= (const AtomicObject<T> &cousin)
59         {
60             set(cousin.get());
61         }
62 
get(void)63         T get (void) const
64         {
65             OGRE_LOCK_AUTO_MUTEX;
66             return mField;
67         }
68 
set(const T & v)69         void set (const T &v)
70         {
71             OGRE_LOCK_AUTO_MUTEX;
72             mField = v;
73         }
74 
cas(const T & old,const T & nu)75         bool cas (const T &old, const T &nu)
76         {
77             OGRE_LOCK_AUTO_MUTEX;
78             if (mField != old) return false;
79             mField = nu;
80             return true;
81         }
82 
83         T operator++ (void)
84         {
85             OGRE_LOCK_AUTO_MUTEX;
86             return ++mField;
87         }
88 
89         T operator++ (int)
90         {
91             OGRE_LOCK_AUTO_MUTEX;
92             return mField++;
93         }
94 
95         T operator-- (int)
96         {
97             OGRE_LOCK_AUTO_MUTEX;
98             return mField--;
99         }
100 
101 		T operator+=(const T &add)
102 		{
103                     OGRE_LOCK_AUTO_MUTEX;
104 			mField += add;
105 			return mField;
106 		}
107 
108 		T operator-=(const T &sub)
109 		{
110                     OGRE_LOCK_AUTO_MUTEX;
111 			mField -= sub;
112 			return mField;
113 		}
114 
115         protected:
116 
117                 OGRE_AUTO_MUTEX;
118 
119         volatile T mField;
120 
121     };
122 	/** @} */
123 	/** @} */
124 
125 }
126 
127 #endif
128 
129