nux-1.16.0
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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 NGLOBALINITIALIZER_H 00024 #define NGLOBALINITIALIZER_H 00025 00026 #include "Macros.h" 00027 #include "System.h" 00028 00029 #ifdef _WIN32 00030 #define NUX_GLOBAL_OBJECT_INIT_SEQUENCE() \ 00031 NUX_GLOBAL_OBJECT_VARIABLE(NGlobalData); \ 00032 NUX_GLOBAL_OBJECT_VARIABLE(NCPU); \ 00033 NUX_GLOBAL_OBJECT_VARIABLE(NProcess); \ 00034 NUX_GLOBAL_OBJECT_VARIABLE(NullOutput); \ 00035 NUX_GLOBAL_OBJECT_VARIABLE(UniqueIndex); \ 00036 NUX_GLOBAL_OBJECT_VARIABLE(NFileManagerWindows); \ 00037 NUX_GLOBAL_OBJECT_VARIABLE(VisualOutputConsole); \ 00038 NUX_GLOBAL_OBJECT_VARIABLE(PrintfOutputConsole); \ 00039 NUX_GLOBAL_OBJECT_VARIABLE(LogFileOutput); \ 00040 NUX_GLOBAL_OBJECT_VARIABLE(LogOutputRedirector); \ 00041 NUX_GLOBAL_OBJECT_VARIABLE(ObjectStats); 00042 00043 //NUX_GLOBAL_OBJECT_VARIABLE(NDefaultMemoryAllocator); 00044 //NUX_GLOBAL_OBJECT_VARIABLE(MemHook); 00045 00046 #elif (defined NUX_OS_LINUX) 00047 #define NUX_GLOBAL_OBJECT_INIT_SEQUENCE() \ 00048 NUX_GLOBAL_OBJECT_VARIABLE(NGlobalData); \ 00049 NUX_GLOBAL_OBJECT_VARIABLE(NullOutput); \ 00050 NUX_GLOBAL_OBJECT_VARIABLE(UniqueIndex); \ 00051 NUX_GLOBAL_OBJECT_VARIABLE(NFileManagerGNU); \ 00052 NUX_GLOBAL_OBJECT_VARIABLE(PrintfOutputConsole); \ 00053 NUX_GLOBAL_OBJECT_VARIABLE(LogFileOutput); \ 00054 NUX_GLOBAL_OBJECT_VARIABLE(LogOutputRedirector); \ 00055 NUX_GLOBAL_OBJECT_VARIABLE(ObjectStats); 00056 00057 //NUX_GLOBAL_OBJECT_VARIABLE(NDefaultMemoryAllocator); 00058 //NUX_GLOBAL_OBJECT_VARIABLE(MemHook); 00059 #endif 00060 00061 namespace nux 00062 { 00063 00064 // This class initialize all inalogic singleton (global objects) in order. It also initialize memory allocators. 00065 // Therefore, do not call new GlobalSingletonInitializer as it will try to call inalogic memory allocator and fail. 00066 // You may use the global placement new operator(it is not overwritten by inalogic) to create GlobalSingletonInitializer 00067 // inside the application data space by calling SystemInitializer(). At shutdown, call SystemShutdown() 00068 // 00069 // You may also create GlobalSingletonInitializer in this way: 00070 // main() 00071 // { 00072 // GlobalSingletonInitializer GlobalInitializer; 00073 // } 00074 // 00075 // 00076 00077 class GlobalSingletonInitializer 00078 { 00079 NUX_DISABLE_OBJECT_COPY (GlobalSingletonInitializer); 00080 GlobalSingletonInitializer *operator & (); 00081 const GlobalSingletonInitializer *operator & () const; 00082 00083 public: 00084 GlobalSingletonInitializer(); 00085 ~GlobalSingletonInitializer(); 00086 00087 static bool Ready(); 00088 private: 00089 static bool m_bGlobalObjectsReady; 00090 00091 NUX_GLOBAL_OBJECT_INIT_SEQUENCE(); 00092 }; 00093 00094 // Hide these functions 00095 // extern NUX_DLL_ENTRY void SystemStart(); 00096 // extern NUX_DLL_ENTRY void SystemShutdown(); 00097 00098 00099 00100 // Nifty Counter idiom. See http://www-d0.fnal.gov/KAI/doc/tutorials/static_initialization.html 00101 class GlobalInitializer 00102 { 00103 public: 00104 GlobalInitializer(); 00105 ~GlobalInitializer(); 00106 00107 static void ForceShutdown(); 00108 private: 00109 static int m_Count; 00110 }; 00111 00112 // Every compilation unit that includes this file will have its own instance of sGlobalInitializer. sGlobalInitializer is initialized 00113 // before the main function of the program is called. The first time sGlobalInitializer is initialized, it calls SystemStart() to create 00114 // our global object singleton. In SystemStart() we have a change to create our singletons in any order we like. 00115 // When the program exits, every instance of sGlobalInitializer will be destroyed. The last instance destroyed will call SystemShutdown(). 00116 // In SystemShutdown() we can destroy our global objects in any order we like. 00117 00118 static GlobalInitializer sGlobalInitializer; 00119 00120 00121 } 00122 00123 #endif // NGLOBALINITIALIZER_H 00124