LOBOT code (by Asdow, original code by Bio).

git-svn-id: https://ja2svn.mooo.com/source/ja2/trunk/GameSource/ja2_v1.13/Build@8755 3b4a5df2-a311-0410-b5c6-a8a6f20db521

Tactical/LogicalBodyTypes/Singleton.h

@@ -0,0 +1,79 @@
+#pragma once
+#ifndef _LBT_SINGLETON__H_
+#define _LBT_SINGLETON__H_
+
+#include <cassert>
+
+/*
+Not thread safe. Copied from the codeproject (Author: Lai Shiaw San Kent)
+*/
+
+template<typename T> class ISingleton {
+public : 
+    static T& Instance();
+};
+
+template<typename T> class Singleton : public ISingleton<T> {
+
+public :
+	static T& Instance();
+    static void Destroy();
+
+protected : 
+    inline explicit Singleton() { 
+        assert(Singleton::instance_ == 0); 
+        Singleton::instance_ = static_cast<T*>(this); 
+    }
+    inline ~Singleton() { 
+        Singleton::instance_ = 0; 
+    }
+
+private : 
+    static T* CreateInstance();
+    static void ScheduleForDestruction(void (*)());
+    static void DestroyInstance(T*);
+
+private : 
+    static T* instance_;
+
+private : 
+    inline explicit Singleton(Singleton const&) {}
+    inline Singleton& operator=(Singleton const&) { return *this; }
+};
+
+
+template<typename T> typename T& Singleton<T>::Instance() {
+    if (Singleton::instance_ == 0) {
+        Singleton::instance_ = CreateInstance();
+        ScheduleForDestruction(Singleton::Destroy);
+    }
+    return *(Singleton::instance_);
+}
+
+template<typename T>
+void Singleton<T>::Destroy() {
+    if (Singleton::instance_ != 0) {
+        DestroyInstance(Singleton::instance_);
+        Singleton::instance_ = 0;
+    }
+}
+
+template<typename T>
+inline typename T* Singleton<T>::CreateInstance() {
+    return new T();
+}
+
+template<typename T>
+inline void Singleton<T>::ScheduleForDestruction(void (*pFun)()) {
+    std::atexit(pFun);
+}
+
+template<typename T>
+inline void Singleton<T>::DestroyInstance(T* p) {
+    delete p;
+}
+
+template<typename T>
+typename T* Singleton<T>::instance_ = 0;
+
+#endif