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/* 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"
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