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/*
Copyright 2020-2024 Vector 35 Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#pragma once
#ifdef WIN32
#include <windows.h>
#endif
#include <stddef.h>
#include <vector>
#include <atomic>
namespace BinaryNinja::KC {
class KCRefCountObject
{
// CORE_ALLOCATED_CLASS(RefCountObject)
public:
std::atomic<int> m_refs;
KCRefCountObject() : m_refs(0) {}
virtual ~KCRefCountObject() {}
virtual void AddRef() { m_refs.fetch_add(1); }
virtual void Release()
{
if (m_refs.fetch_sub(1) == 1)
delete this;
}
virtual void AddAPIRef() { AddRef(); }
virtual void ReleaseAPIRef() { Release(); }
};
template <class T>
class KCRef
{
T* m_obj;
#ifdef BN_REF_COUNT_DEBUG
void* m_assignmentTrace = nullptr;
#endif
public:
KCRef() : m_obj(NULL) {}
KCRef(T* obj) : m_obj(obj)
{
if (m_obj)
{
m_obj->AddRef();
#ifdef BN_REF_COUNT_DEBUG
m_assignmentTrace = BNRegisterObjectRefDebugTrace(typeid(T).name());
#endif
}
}
KCRef(const KCRef& obj) : m_obj(obj.m_obj)
{
if (m_obj)
{
m_obj->AddRef();
#ifdef BN_REF_COUNT_DEBUG
m_assignmentTrace = BNRegisterObjectRefDebugTrace(typeid(T).name());
#endif
}
}
~KCRef()
{
if (m_obj)
{
m_obj->Release();
#ifdef BN_REF_COUNT_DEBUG
BNUnregisterObjectRefDebugTrace(typeid(T).name(), m_assignmentTrace);
#endif
}
}
// move constructor
KCRef(KCRef&& other) : m_obj(other.m_obj)
{
other.m_obj = 0;
#ifdef BN_REF_COUNT_DEBUG
m_assignmentTrace = other.m_assignmentTrace;
#endif
}
// move assignment (inefficient in this case)
// Ref<T>& operator=(Ref<T>&& other)
// {
// if (m_obj)
// {
// #ifdef BN_REF_COUNT_DEBUG
// BNUnregisterObjectRefDebugTrace(typeid(T).name(), m_assignmentTrace);
// #endif
// m_obj->Release();
// }
// m_obj = other.m_obj;
// other.m_obj = 0;
// #ifdef BN_REF_COUNT_DEBUG
// m_assignmentTrace = other.m_assignmentTrace;
// #endif
// return *this;
// }
KCRef<T>& operator=(const KCRef<T>& obj)
{
#ifdef BN_REF_COUNT_DEBUG
if (m_obj)
BNUnregisterObjectRefDebugTrace(typeid(T).name(), m_assignmentTrace);
if (obj.m_obj)
m_assignmentTrace = BNRegisterObjectRefDebugTrace(typeid(T).name());
#endif
T* oldObj = m_obj;
m_obj = obj.m_obj;
if (m_obj)
m_obj->AddRef();
if (oldObj)
oldObj->Release();
return *this;
}
KCRef<T>& operator=(T* obj)
{
#ifdef BN_REF_COUNT_DEBUG
if (m_obj)
BNUnregisterObjectRefDebugTrace(typeid(T).name(), m_assignmentTrace);
if (obj)
m_assignmentTrace = BNRegisterObjectRefDebugTrace(typeid(T).name());
#endif
T* oldObj = m_obj;
m_obj = obj;
if (m_obj)
m_obj->AddRef();
if (oldObj)
oldObj->Release();
return *this;
}
operator T*() const { return m_obj; }
T* operator->() const { return m_obj; }
T& operator*() const { return *m_obj; }
bool operator!() const { return m_obj == NULL; }
T* GetPtr() const { return m_obj; }
bool operator==(const KCRef<T>& obj) const { return m_obj == obj.m_obj; }
bool operator!=(const KCRef<T>& obj) const { return m_obj != obj.m_obj; }
bool operator<(const KCRef<T>& obj) const { return m_obj < obj.m_obj; }
template <typename H>
friend H AbslHashValue(H h, const KCRef<T>& value)
{
return AbslHashValue(std::move(h), value.m_obj);
}
};
// Macro-like functions to manage referenced objects for the external API
template <class T>
static typename T::APIHandle KC_API_OBJECT_REF(T* obj)
{
if (obj == nullptr)
return nullptr;
obj->AddAPIRef();
return obj->GetAPIObject();
}
template <class T>
static typename T::APIHandle KC_API_OBJECT_REF(const KCRef<T>& obj)
{
if (!obj)
return nullptr;
obj->AddAPIRef();
return obj->GetAPIObject();
}
// template <class T>
// static typename T::APIHandle KC_API_OBJECT_REF(const APIRef<T>& obj)
//{
// if (!obj)
// return nullptr;
// obj->AddAPIRef();
// return obj->GetAPIObject();
// }
template <class T>
static T* KC_API_OBJECT_NEW_REF(T* obj)
{
if (obj)
obj->object->AddAPIRef();
return obj;
}
template <class T>
static void KC_API_OBJECT_FREE(T* obj)
{
if (obj)
obj->object->ReleaseAPIRef();
}
}; // namespace BinaryNinja::KC
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