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thirdparty/luaplus/Src/LuaPlus/LuaAutoBlock.h

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+///////////////////////////////////////////////////////////////////////////////
+// This source file is part of the LuaPlus source distribution and is Copyright
+// 2001-2011 by Joshua C. Jensen (jjensen@workspacewhiz.com).
+//
+// The latest version may be obtained from http://luaplus.org/.
+//
+// The code presented in this file may be used in any environment it is
+// acceptable to use Lua.
+///////////////////////////////////////////////////////////////////////////////
+#ifndef LUAPLUS__LUAAUTOBLOCK_H
+#define LUAPLUS__LUAAUTOBLOCK_H
+
+#include "LuaPlusInternal.h"
+
+///////////////////////////////////////////////////////////////////////////////
+// namespace LuaPlus
+///////////////////////////////////////////////////////////////////////////////
+namespace LuaPlus {
+
+///////////////////////////////////////////////////////////////////////////
+///////////////////////////////////////////////////////////////////////////
+///////////////////////////////////////////////////////////////////////////
+/**
+	A helper class for automatically setting the stack state back to point of
+	LuaAutoBlock creation.
+**/
+class LuaAutoBlock {
+public:
+	LuaAutoBlock(LuaState* state)
+		: L(LuaState_to_lua_State(state))
+		, stackTop(lua_gettop(L)) {
+	}
+
+	LuaAutoBlock(lua_State* L_)
+		: L(L_)
+		, stackTop(lua_gettop(L)) {
+	}
+
+	LuaAutoBlock(LuaStackObject& object)
+		: L(object.GetCState())
+		, stackTop(lua_gettop(L)) {
+	}
+
+	~LuaAutoBlock() {
+		lua_settop(L, stackTop);
+	}
+
+private:
+	LuaAutoBlock(const LuaAutoBlock& src);					// Not implemented
+	const LuaAutoBlock& operator=(const LuaAutoBlock& src);	// Not implemented
+
+	lua_State* L;
+	int stackTop;
+};
+
+} // namespace LuaPlus
+
+#endif // LUAPLUS__LUAAUTOBLOCK_H