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#ifndef __JIN_COMMON_SHARED_H__
#define __JIN_COMMON_SHARED_H__
//#include "je_lua.h"
#include <map>
#include <vector>
namespace JinEngine
{
namespace Lua
{
class SharedBase
{
public:
void retain()
{
++mCount;
}
void release()
{
if (--mCount <= 0)
delete this;
}
// Object type.
const char* const type;
void setDependency(int key, SharedBase* shared)
{
removeDependency(key);
shared->retain();
mDependencies.insert(std::pair<int, SharedBase*>(key, shared));
}
void removeDependency(int key)
{
if (!isDependOn(key))
return;
DepMap::iterator it = mDependencies.find(key);
it->second->release();
mDependencies.erase(it);
}
void removeDependency(SharedBase* dep)
{
for (DepMap::iterator it = mDependencies.begin(); it != mDependencies.end();)
{
if (it->second == dep)
{
it->second->release();
mDependencies.erase(it);
}
else
++it;
}
}
bool isDependOn(int key)
{
return mDependencies.find(key) != mDependencies.end();
}
bool isDependOn(SharedBase* shared)
{
for (std::pair<int, SharedBase*> dep : mDependencies)
{
if (dep.second == shared)
return true;
}
return false;
}
void clearDependencies()
{
for (std::pair<int, SharedBase*> dep : mDependencies)
dep.second->release();
mDependencies.clear();
}
SharedBase* getDependency(int key)
{
if (!isDependOn(key))
return nullptr;
return mDependencies.find(key)->second;
}
bool isType(const char* t)
{
return strcmp(type, t) == 0;
}
int getDependencyCount()
{
return mDependencies.size();
}
protected:
using DepMap = std::map<int, SharedBase*>;
SharedBase(void* obj, const char* t)
: mCount(0)
, mObject(obj)
, type(t)
{
}
SharedBase(const SharedBase&);
virtual ~SharedBase()
{
clearDependencies();
}
void* mObject;
int mCount;
DepMap mDependencies;
};
template<class T>
class Shared : public SharedBase
{
public:
Shared(T* obj, const char* type)
: SharedBase(obj, type)
{
}
T* operator->()
{
return static_cast<T*>(mObject);
}
T* getObject()
{
return static_cast<T*>(mObject);
}
private:
// Disable copy constructor.
Shared(const Shared<T>& shared);
// Make shared only be able created with new.
~Shared()
{
// Delete object mapping.
luax_removeobject(LuaState::get(), this);
//
T* obj = static_cast<T*>(mObject);
delete obj;
}
};
} // namespace Lua
} // namespace JinEngine
#endif
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