1 files changed, 225 insertions, 0 deletions
diff --git a/lib/base/object.hpp b/lib/base/object.hpp
new file mode 100644
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--- /dev/null
+++ b/lib/base/object.hpp
@@ -0,0 +1,225 @@
+/* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
+
+#ifndef OBJECT_H
+#define OBJECT_H
+
+#include "base/i2-base.hpp"
+#include "base/debug.hpp"
+#include <boost/smart_ptr/intrusive_ptr.hpp>
+#include <atomic>
+#include <cstddef>
+#include <cstdint>
+#include <mutex>
+#include <thread>
+#include <vector>
+
+using boost::intrusive_ptr;
+using boost::dynamic_pointer_cast;
+using boost::static_pointer_cast;
+
+namespace icinga
+{
+
+class Value;
+class Object;
+class Type;
+class String;
+struct DebugInfo;
+class ValidationUtils;
+
+extern Value Empty;
+
+#define DECLARE_PTR_TYPEDEFS(klass) \
+	typedef intrusive_ptr<klass> Ptr
+
+#define IMPL_TYPE_LOOKUP_SUPER() 					\
+
+#define IMPL_TYPE_LOOKUP() 							\
+	static intrusive_ptr<Type> TypeInstance;				\
+	virtual intrusive_ptr<Type> GetReflectionType() const override		\
+	{									\
+		return TypeInstance;						\
+	}
+
+#define DECLARE_OBJECT(klass) \
+	DECLARE_PTR_TYPEDEFS(klass); \
+	IMPL_TYPE_LOOKUP();
+
+#define REQUIRE_NOT_NULL(ptr) RequireNotNullInternal(ptr, #ptr)
+
+void RequireNotNullInternal(const intrusive_ptr<Object>& object, const char *description);
+
+void DefaultObjectFactoryCheckArgs(const std::vector<Value>& args);
+
+template<typename T>
+intrusive_ptr<Object> DefaultObjectFactory(const std::vector<Value>& args)
+{
+	DefaultObjectFactoryCheckArgs(args);
+
+	return new T();
+}
+
+template<typename T>
+intrusive_ptr<Object> DefaultObjectFactoryVA(const std::vector<Value>& args)
+{
+	return new T(args);
+}
+
+typedef intrusive_ptr<Object> (*ObjectFactory)(const std::vector<Value>&);
+
+template<typename T, bool VA>
+struct TypeHelper
+{
+};
+
+template<typename T>
+struct TypeHelper<T, false>
+{
+	static ObjectFactory GetFactory()
+	{
+		return DefaultObjectFactory<T>;
+	}
+};
+
+template<typename T>
+struct TypeHelper<T, true>
+{
+	static ObjectFactory GetFactory()
+	{
+		return DefaultObjectFactoryVA<T>;
+	}
+};
+
+template<typename T>
+struct Lazy
+{
+	using Accessor = std::function<T ()>;
+
+	explicit Lazy(T value)
+		: m_Cached(true), m_Value(value)
+ 	{ }
+
+	explicit Lazy(Accessor accessor)
+		: m_Accessor(accessor)
+	{ }
+
+	template<typename U>
+	explicit Lazy(const Lazy<U>& other)
+	{
+		if (other.m_Cached) {
+			m_Accessor = Accessor();
+			m_Value = static_cast<T>(other.m_Value);
+			m_Cached = true;
+		} else {
+			auto accessor = other.m_Accessor;
+			m_Accessor = [accessor]() { return static_cast<T>(accessor()); };
+			m_Cached = false;
+		}
+	}
+
+	template<typename U>
+	operator Lazy<U>() const
+	{
+		if (m_Cached)
+			return Lazy<U>(static_cast<U>(m_Value));
+		else {
+			Accessor accessor = m_Accessor;
+			return Lazy<U>(static_cast<typename Lazy<U>::Accessor>([accessor]() { return static_cast<U>(accessor()); }));
+		}
+	}
+
+	const T& operator()() const
+	{
+		if (!m_Cached) {
+			m_Value = m_Accessor();
+			m_Cached = true;
+		}
+
+		return m_Value;
+	}
+
+private:
+	Accessor m_Accessor;
+	mutable bool m_Cached{false};
+	mutable T m_Value;
+
+	template<typename U>
+	friend struct Lazy;
+};
+
+/**
+ * Base class for all heap-allocated objects. At least one of its methods
+ * has to be virtual for RTTI to work.
+ *
+ * @ingroup base
+ */
+class Object
+{
+public:
+	DECLARE_PTR_TYPEDEFS(Object);
+
+	Object();
+	virtual ~Object();
+
+	virtual String ToString() const;
+
+	virtual intrusive_ptr<Type> GetReflectionType() const;
+
+	virtual void Validate(int types, const ValidationUtils& utils);
+
+	virtual void SetField(int id, const Value& value, bool suppress_events = false, const Value& cookie = Empty);
+	virtual Value GetField(int id) const;
+	virtual Value GetFieldByName(const String& field, bool sandboxed, const DebugInfo& debugInfo) const;
+	virtual void SetFieldByName(const String& field, const Value& value, bool overrideFrozen, const DebugInfo& debugInfo);
+	virtual bool HasOwnField(const String& field) const;
+	virtual bool GetOwnField(const String& field, Value *result) const;
+	virtual void ValidateField(int id, const Lazy<Value>& lvalue, const ValidationUtils& utils);
+	virtual void NotifyField(int id, const Value& cookie = Empty);
+	virtual Object::Ptr NavigateField(int id) const;
+
+#ifdef I2_DEBUG
+	bool OwnsLock() const;
+#endif /* I2_DEBUG */
+
+	static Object::Ptr GetPrototype();
+
+	virtual Object::Ptr Clone() const;
+
+	static intrusive_ptr<Type> TypeInstance;
+
+private:
+	Object(const Object& other) = delete;
+	Object& operator=(const Object& rhs) = delete;
+
+	std::atomic<uint_fast64_t> m_References;
+	mutable std::recursive_mutex m_Mutex;
+
+#ifdef I2_DEBUG
+	mutable std::atomic<std::thread::id> m_LockOwner;
+	mutable size_t m_LockCount = 0;
+#endif /* I2_DEBUG */
+
+	friend struct ObjectLock;
+
+	friend void intrusive_ptr_add_ref(Object *object);
+	friend void intrusive_ptr_release(Object *object);
+};
+
+Value GetPrototypeField(const Value& context, const String& field, bool not_found_error, const DebugInfo& debugInfo);
+
+void TypeAddObject(Object *object);
+void TypeRemoveObject(Object *object);
+
+void intrusive_ptr_add_ref(Object *object);
+void intrusive_ptr_release(Object *object);
+
+template<typename T>
+class ObjectImpl
+{
+};
+
+}
+
+#endif /* OBJECT_H */
+
+#include "base/type.hpp"