SerializationContext.h

 
#pragma once
 
template <typename Derived>
class plSerializationContext
{
  PL_DISALLOW_COPY_AND_ASSIGN(plSerializationContext);
 
public:
  plSerializationContext() { Derived::SetContext(this); }
  ~plSerializationContext() { Derived::SetContext(nullptr); }
 
  void SetActive(bool bActive) { Derived::SetContext(bActive ? this : nullptr); }
};
 
#define PL_DECLARE_SERIALIZATION_CONTEXT(type) \
public:                                        \
  static type* GetContext();                   \
                                               \
protected:                                     \
  friend class plSerializationContext<type>;   \
  static void SetContext(plSerializationContext* pContext);
 
 
#define PL_IMPLEMENT_SERIALIZATION_CONTEXT(type)                                                                                        \
  thread_local type* PL_PP_CONCAT(s_pActiveContext, type);                                                                              \
  type* type::GetContext()                                                                                                              \
  {                                                                                                                                     \
    return PL_PP_CONCAT(s_pActiveContext, type);                                                                                        \
  }                                                                                                                                     \
  void type::SetContext(plSerializationContext* pContext)                                                                               \
  {                                                                                                                                     \
    PL_ASSERT_DEV(pContext == nullptr || PL_PP_CONCAT(s_pActiveContext, type) == nullptr, "Only one context can be active at a time."); \
    PL_PP_CONCAT(s_pActiveContext, type) = static_cast<type*>(pContext);                                                                \
  }