nux-0.9.46
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00001 /* 00002 * Copyright 2010 Inalogic® Inc. 00003 * 00004 * This program is free software: you can redistribute it and/or modify it 00005 * under the terms of the GNU Lesser General Public License, as 00006 * published by the Free Software Foundation; either version 2.1 or 3.0 00007 * of the License. 00008 * 00009 * This program is distributed in the hope that it will be useful, but 00010 * WITHOUT ANY WARRANTY; without even the implied warranties of 00011 * MERCHANTABILITY, SATISFACTORY QUALITY or FITNESS FOR A PARTICULAR 00012 * PURPOSE. See the applicable version of the GNU Lesser General Public 00013 * License for more details. 00014 * 00015 * You should have received a copy of both the GNU Lesser General Public 00016 * License along with this program. If not, see <http://www.gnu.org/licenses/> 00017 * 00018 * Authored by: Jay Taoko <jaytaoko@inalogic.com> 00019 * 00020 */ 00021 00022 00023 #ifndef NUXGLOBALINITIALIZER_H 00024 #define NUXGLOBALINITIALIZER_H 00025 00026 #define NUX_NUX_GLOBAL_OBJECT_INIT_SEQUENCE() 00027 // 00028 // NUX_GLOBAL_OBJECT_VARIABLE(RenderingStats); 00029 00030 00031 00032 namespace nux 00033 { 00034 00035 class NuxGlobalSingletonInitializer 00036 { 00037 NUX_DISABLE_OBJECT_COPY (NuxGlobalSingletonInitializer); 00038 NuxGlobalSingletonInitializer *operator & (); 00039 const NuxGlobalSingletonInitializer *operator & () const; 00040 00041 public: 00042 NuxGlobalSingletonInitializer(); 00043 ~NuxGlobalSingletonInitializer(); 00044 00045 static bool Ready(); 00046 private: 00047 static bool m_NuxGlobalObjectsReady; 00048 00049 NUX_NUX_GLOBAL_OBJECT_INIT_SEQUENCE(); 00050 }; 00051 00052 00053 // Nifty Counter idiom. See http://www-d0.fnal.gov/KAI/doc/tutorials/static_initialization.html 00054 class NuxGlobalInitializer 00055 { 00056 public: 00057 NuxGlobalInitializer(); 00058 ~NuxGlobalInitializer(); 00059 private: 00060 static int m_Count; 00061 }; 00062 00063 // Every compilation unit that includes this file will have its own instance of sGlobalInitializer. sGlobalInitializer is initialized 00064 // before the main function of the program is called. The first time sGlobalInitializer is initialized, it calls SystemStart() to create 00065 // our global object singleton. In SystemStart() we have a change to create our singletons in any order we like. 00066 // When the program exits, every instance of sGlobalInitializer will be destroyed. The last instance destroyed will call SystemShutdown(). 00067 // In SystemShutdown() we can destroy our global objects in any order we like. 00068 00069 static NuxGlobalInitializer sNuxGlobalInitializer; 00070 00071 00072 } 00073 00074 #endif // NUXGLOBALINITIALIZER_H