__gnu_cxx::_Relative_pointer_impl< _Tp >(3)           Library Functions Manual

NAME
       __gnu_cxx::_Relative_pointer_impl< _Tp > - A storage policy for use
       with _Pointer_adapter<> which stores the pointer's address as an offset
       value which is relative to its own address.


SYNOPSIS
       #include <pointer.h>

   Public Types
       typedef _Tp element_type

   Public Member Functions
       _Tp * get () const
       bool operator< (const _Relative_pointer_impl &__rarg) const
       bool operator== (const _Relative_pointer_impl &__rarg) const
       void set (_Tp *__arg)

Detailed Description
   template<typename _Tp>
       class __gnu_cxx::_Relative_pointer_impl< _Tp >"A storage policy for use
       with _Pointer_adapter<> which stores the pointer's address as an offset
       value which is relative to its own address.

       This is intended for pointers within shared memory regions which might
       be mapped at different addresses by different processes. For null
       pointers, a value of 1 is used. (0 is legitimate sometimes for nodes in
       circularly linked lists) This value was chosen as the least likely to
       generate an incorrect null, As there is no reason why any normal
       pointer would point 1 byte into its own pointer address.


Author
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                                   libstdc++
                                   __gnu_cxx::_Relative_pointer_impl< _Tp >(3)