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#ifndef __JIN_COMMON_SHARED_H__
#define __JIN_COMMON_SHARED_H__
#include <map>
#include <vector>
#include <functional>
struct lua_State;
namespace JinEngine
{
namespace Lua
{
class SharedBase
{
public:
void retain();
void release();
// Object type.
const char* const type;
void setDependency(int key, SharedBase* shared);
void removeDependency(int key);
void removeDependency(SharedBase* dep);
bool isDependOn(int key);
bool isDependOn(SharedBase* shared);
void clearDependencies();
SharedBase* getDependency(int key);
bool isType(const char* t);
int getDependencyCount();
protected:
SharedBase(lua_State* L, void* obj, const char* t)
: mCount(0)
, mObject(obj)
, mL(L)
, type(t)
{
}
SharedBase(const SharedBase&);
virtual ~SharedBase()
{
clearDependencies();
}
using DepsMap = std::map<int, SharedBase*>;
void* mObject;
int mCount;
lua_State* mL;
DepsMap mDependencies;
};
template<class T>
class Shared : public SharedBase
{
public:
Shared(lua_State* L, T* obj, const char* type)
: SharedBase(L, 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()
{
T* obj = static_cast<T*>(mObject);
delete obj;
}
};
} // namespace Lua
} // namespace JinEngine
#endif
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