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IReference.h

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00001 /*
00002 
00003 AmnesiaEngine
00004 Copyright (c) 2006 John DiSanti.
00005 
00006 Permission is hereby granted, free of charge,
00007 to any person obtaining a copy of this software and associated
00008 documentation files (the "Software"), to deal in the Software
00009 without restriction, including without limitation the rights to
00010 use, copy, modify, merge, publish, distribute, sublicense,
00011 and/or sell copies of the Software, and to permit persons to
00012 whom the Software is furnished to do so, subject to the following
00013 conditions:
00014 
00015 The above copyright notice and this permission notice shall be included
00016 in all copies or substantial portions of the Software.
00017 
00018 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
00019 INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
00020 PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
00021 HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
00022 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
00023 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00024 
00025 */
00026 
00027 #ifndef AMN_IREFERENCE_H
00028 #define AMN_IREFERENCE_H
00029 
00030 namespace amn
00031 {
00033         class IReference
00034         {
00035         public:
00037                 IReference()
00038                 {
00039                         referenceCount = 1;
00040                 }
00042                 virtual ~IReference()
00043                 {
00044                 }
00045 
00047 
00052                 virtual bool drop()
00053                 {
00054                         referenceCount--;
00055                         if(referenceCount == 0)
00056                         {
00057                                 delete this;
00058                                 return true;
00059                         }
00060 
00061                         return false;
00062                 }
00063 
00065                 virtual void grab()
00066                 {
00067                         referenceCount++;
00068                 }
00069 
00070         private:
00071                 int referenceCount;
00072         };
00073 };
00074 
00075 #endif//AMN_IREFERENCE_H
00076 
00077 /* End of File */

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