cxxabi.h

mingw32.rar

  class __class_type_info;

  // Type information for a pointer to member variable.
  class __pointer_to_member_type_info : public __pbase_type_info
  {
  public:
    __class_type_info* __context;   // Class of the member.

    explicit 
    __pointer_to_member_type_info(const char* __n, int __quals,
				  const std::type_info* __type, 
				  __class_type_info* __klass)
    : __pbase_type_info(__n, __quals, __type), __context(__klass) { }

    virtual 
    ~__pointer_to_member_type_info();

  protected:
    __pointer_to_member_type_info(const __pointer_to_member_type_info&);

    __pointer_to_member_type_info&
    operator=(const __pointer_to_member_type_info&);

    // Implementation defined member function.
    virtual bool 
    __pointer_catch(const __pbase_type_info* __thr_type, void** __thr_obj,
		    unsigned __outer) const;
  };

  // Helper class for __vmi_class_type.
  class __base_class_type_info
  {
  public:
    const __class_type_info* 	__base_type;  // Base class type.
    long 			__offset_flags;  // Offset and info.

    enum __offset_flags_masks 
      {
	__virtual_mask = 0x1,
	__public_mask = 0x2,
	__hwm_bit = 2,
	__offset_shift = 8          // Bits to shift offset.
      };
  
    // Implementation defined member functions.
    bool 
    __is_virtual_p() const
    { return __offset_flags & __virtual_mask; }

    bool 
    __is_public_p() const
    { return __offset_flags & __public_mask; }

    ptrdiff_t 
    __offset() const
    { 
      // This shift, being of a signed type, is implementation
      // defined. GCC implements such shifts as arithmetic, which is
      // what we want.
      return static_cast<ptrdiff_t>(__offset_flags) >> __offset_shift;
    }
  };

  // Type information for a class.
  class __class_type_info : public std::type_info
  {
  public:
    explicit 
    __class_type_info (const char *__n) : type_info(__n) { }

    virtual 
    ~__class_type_info ();

    // Implementation defined types.
    // The type sub_kind tells us about how a base object is contained
    // within a derived object. We often do this lazily, hence the
    // UNKNOWN value. At other times we may use NOT_CONTAINED to mean
    // not publicly contained.
    enum __sub_kind
      {
	// We have no idea.
	__unknown = 0, 

	// Not contained within us (in some circumstances this might
	// mean not contained publicly)
	__not_contained, 

	// Contained ambiguously.
	__contained_ambig, 
    
	// Via a virtual path.
	__contained_virtual_mask = __base_class_type_info::__virtual_mask, 

	// Via a public path.
	__contained_public_mask = __base_class_type_info::__public_mask,   

	// Contained within us.
	__contained_mask = 1 << __base_class_type_info::__hwm_bit,
    
	__contained_private = __contained_mask,
	__contained_public = __contained_mask | __contained_public_mask
      };

    struct __upcast_result;
    struct __dyncast_result;

  protected:
    // Implementation defined member functions.
    virtual bool 
    __do_upcast(const __class_type_info* __dst_type, void**__obj_ptr) const;

    virtual bool 
    __do_catch(const type_info* __thr_type, void** __thr_obj, 
	       unsigned __outer) const;

  public:
    // Helper for upcast. See if DST is us, or one of our bases. 
    // Return false if not found, true if found. 
    virtual bool 
    __do_upcast(const __class_type_info* __dst, const void* __obj,
		__upcast_result& __restrict __result) const;

    // Indicate whether SRC_PTR of type SRC_TYPE is contained publicly
    // within OBJ_PTR. OBJ_PTR points to a base object of our type,
    // which is the destination type. SRC2DST indicates how SRC
    // objects might be contained within this type.  If SRC_PTR is one
    // of our SRC_TYPE bases, indicate the virtuality. Returns
    // not_contained for non containment or private containment.
    inline __sub_kind 
    __find_public_src(ptrdiff_t __src2dst, const void* __obj_ptr,
		      const __class_type_info* __src_type, 
		      const void* __src_ptr) const;

    // Helper for dynamic cast. ACCESS_PATH gives the access from the
    // most derived object to this base. DST_TYPE indicates the
    // desired type we want. OBJ_PTR points to a base of our type
    // within the complete object. SRC_TYPE indicates the static type
    // started from and SRC_PTR points to that base within the most
    // derived object. Fill in RESULT with what we find. Return true
    // if we have located an ambiguous match.
    virtual bool 
    __do_dyncast(ptrdiff_t __src2dst, __sub_kind __access_path,
		 const __class_type_info* __dst_type, const void* __obj_ptr, 
		 const __class_type_info* __src_type, const void* __src_ptr, 
		 __dyncast_result& __result) const;
    
    // Helper for find_public_subobj. SRC2DST indicates how SRC_TYPE
    // bases are inherited by the type started from -- which is not
    // necessarily the current type. The current type will be a base
    // of the destination type.  OBJ_PTR points to the current base.
    virtual __sub_kind 
    __do_find_public_src(ptrdiff_t __src2dst, const void* __obj_ptr,
			 const __class_type_info* __src_type,
			 const void* __src_ptr) const;
  };

  // Type information for a class with a single non-virtual base.
  class __si_class_type_info : public __class_type_info
  {
  public:
    const __class_type_info* __base_type;

    explicit 
    __si_class_type_info(const char *__n, const __class_type_info *__base)
    : __class_type_info(__n), __base_type(__base) { }

    virtual 
    ~__si_class_type_info();

  protected:
    __si_class_type_info(const __si_class_type_info&);

    __si_class_type_info&
    operator=(const __si_class_type_info&);

    // Implementation defined member functions.
    virtual bool 
    __do_dyncast(ptrdiff_t __src2dst, __sub_kind __access_path,
		 const __class_type_info* __dst_type, const void* __obj_ptr,
		 const __class_type_info* __src_type, const void* __src_ptr,
		 __dyncast_result& __result) const;

    virtual __sub_kind 
    __do_find_public_src(ptrdiff_t __src2dst, const void* __obj_ptr,
			 const __class_type_info* __src_type,
			 const void* __sub_ptr) const;

    virtual bool 
    __do_upcast(const __class_type_info*__dst, const void*__obj,
		__upcast_result& __restrict __result) const;
  };

  // Type information for a class with multiple and/or virtual bases.
  class __vmi_class_type_info : public __class_type_info 
  {
  public:
    unsigned int 		__flags;  // Details about the class hierarchy.
    unsigned int 		__base_count;  // Dumber of direct bases.

    // The array of bases uses the trailing array struct hack so this
    // class is not constructable with a normal constructor. It is
    // internally generated by the compiler.
    __base_class_type_info 	__base_info[1];  // Array of bases.

    explicit 
    __vmi_class_type_info(const char* __n, int ___flags)
    : __class_type_info(__n), __flags(___flags), __base_count(0) { }

    virtual 
    ~__vmi_class_type_info();

    // Implementation defined types.
    enum __flags_masks 
      {
	__non_diamond_repeat_mask = 0x1, // Distinct instance of repeated base.
	__diamond_shaped_mask = 0x2, // Diamond shaped multiple inheritance.
	__flags_unknown_mask = 0x10
      };

  protected:
    // Implementation defined member functions.
    virtual bool 
    __do_dyncast(ptrdiff_t __src2dst, __sub_kind __access_path,
		 const __class_type_info* __dst_type, const void* __obj_ptr,
		 const __class_type_info* __src_type, const void* __src_ptr,
		 __dyncast_result& __result) const;

    virtual __sub_kind 
    __do_find_public_src(ptrdiff_t __src2dst, const void* __obj_ptr, 
			 const __class_type_info* __src_type,
			 const void* __src_ptr) const;
    
    virtual bool 
    __do_upcast(const __class_type_info* __dst, const void* __obj,
		__upcast_result& __restrict __result) const;
  };

  // Dynamic cast runtime.
  // src2dst has the following possible values
  //  >-1: src_type is a unique public non-virtual base of dst_type
  //       dst_ptr + src2dst == src_ptr
  //   -1: unspecified relationship
  //   -2: src_type is not a public base of dst_type
  //   -3: src_type is a multiple public non-virtual base of dst_type
  extern "C" void*
  __dynamic_cast(const void* __src_ptr, // Starting object.
		 const __class_type_info* __src_type, // Static type of object.
		 const __class_type_info* __dst_type, // Desired target type.
		 ptrdiff_t __src2dst); // How src and dst are related.


  // Returns the type_info for the currently handled exception [15.3/8], or
  // null if there is none.
  extern "C" std::type_info*
  __cxa_current_exception_type();
} // namespace __cxxabiv1

// User programs should use the alias `abi'. 
namespace abi = __cxxabiv1;

#endif // __cplusplus

#endif // __CXXABI_H