From 70b82d1981c0de3c7b77670ff8abcfeb26815142 Mon Sep 17 00:00:00 2001
From: chai <chaifix@163.com>
Date: Tue, 12 Mar 2019 00:39:26 +0800
Subject: *misc

---
 Source/Samples/LuaxTest/header.h | 60 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 Source/Samples/LuaxTest/header.h

(limited to 'Source/Samples/LuaxTest/header.h')

diff --git a/Source/Samples/LuaxTest/header.h b/Source/Samples/LuaxTest/header.h
new file mode 100644
index 0000000..386ae71
--- /dev/null
+++ b/Source/Samples/LuaxTest/header.h
@@ -0,0 +1,60 @@
+
+#ifndef ASSERT
+#ifdef NDEBUG
+#define ASSERT(x) { false ? (void)(x) : (void)0; }
+#else
+#ifdef _WIN32
+#define ASURA_DEBUG_BREAK() __debugbreak()
+#else
+#define ASURA_DEBUG_BREAK()  raise(SIGTRAP) 
+#endif
+#define ASSERT(x) do { const volatile bool asura_assert_b____ = !(x); if(asura_assert_b____) ASURA_DEBUG_BREAK(); } while (false)
+#endif
+#endif
+
+///
+/// 继承Singleton的类在第一次实例化时保存实例，之后如果再次实例化会报错。
+/// 
+template<class T>
+class Singleton
+{
+public:
+
+	static T* Get()
+	{
+		// 如果之前没有创建，在这里立即创建一个并保存
+		if (!instance) instance = new T;
+		// 返回实例
+		return instance;
+	}
+
+	static void Destroy()
+	{
+		delete instance;
+		instance = nullptr;
+	}
+
+protected:
+
+	Singleton()
+	{
+		// 如果有instance，意味着又创建了一个实例，这是错误的。
+		ASSERT(!instance);
+		// 否则，将本实体作为实例
+		instance = static_cast<T*>(this);
+	};
+
+	virtual ~Singleton() {};
+
+	static T* instance;
+
+private:
+
+	Singleton(const Singleton& singleton);
+
+	Singleton& operator = (const Singleton& singleton);
+
+};
+
+template<class T>
+T* Singleton<T>::instance = nullptr;
-- 
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