TAO/tests/Bug_2084_Regression/tid_to_int.h

   1 // -*- C++ -*-
   2
   3 /**
   4  * @file tid_to_int.h
   5  *
   6  * Convert an ACE_thread_t to an integer in a way that doesn't rely
   7  * heavily on platform-specific configuration.
   8  *
   9  * @author Ossama Othman
  10  */
  11
  12 namespace
  13 {
  14   template<typename thread_id_type, typename ace_thread_id_type>
  15   struct ACE_thread_t_to_integer_i
  16   {
  17     thread_id_type operator() (ace_thread_id_type tid)
  18     {
  19       // We assume sizeof(thread_id_type) >= sizeof(ace_thread_id_type).
  20       return (thread_id_type) (tid);
  21     }
  22   };
  23
  24   template<typename thread_id_type, typename ace_thread_id_type>
  25   struct ACE_thread_t_to_integer_i<thread_id_type, ace_thread_id_type*>
  26   {
  27     thread_id_type operator() (ace_thread_id_type* tid)
  28     {
  29       // ACE_thread_t is a pointer.  Cast to an intermediate integer
  30       // type large enough to hold a pointer.
  31 #if defined (ACE_OPENVMS) && (!defined (__INITIAL_POINTER_SIZE) || (__INITIAL_POINTER_SIZE < 64))
  32       int const tmp = reinterpret_cast<int> (tid);
  33 #else
  34       intptr_t const tmp = reinterpret_cast<intptr_t> (tid);
  35 #endif
  36
  37       // We assume sizeof(thread_id_type) >= sizeof(ace_thread_id_type).
  38       return (thread_id_type) tmp;
  39     }
  40   };
  41
  42   template<typename thread_id_type>
  43   thread_id_type
  44   ACE_thread_t_to_integer (ACE_thread_t tid)
  45   {
  46     return ACE_thread_t_to_integer_i<thread_id_type, ACE_thread_t>() (tid);
  47   }
  48 }
  49