TAO/tao/Versioned_Namespace.h

   1 // -*- C++ -*-
   2
   3 //=============================================================================
   4 /**
   5  * @file    Versioned_Namespace.h
   6  *
   7  * Versioned namespace support.
   8  *
   9  * Useful for preventing conflicts when using a third party library.
  10  *
  11  * @author Ossama Othman <ossama@dre.vanderbilt.edu>
  12  */
  13 //=============================================================================
  14
  15 #ifndef TAO_VERSIONED_NAMESPACE_H
  16 #define TAO_VERSIONED_NAMESPACE_H
  17
  18 #if !defined (TAO_ORBCONF_H) && !defined (ACE_CONFIG_MACROS_H)
  19 # error This header is only meant to be included after "tao/orbconf.h".
  20 #endif  /* !TAO_ORBCONF_H */
  21
  22
  23 #if !defined (TAO_HAS_VERSIONED_NAMESPACE) \
  24   && defined (ACE_HAS_VERSIONED_NAMESPACE) \
  25   && ACE_HAS_VERSIONED_NAMESPACE == 1
  26 # define TAO_HAS_VERSIONED_NAMESPACE 1
  27 #endif  /* !TAO_HAS_VERSIONED_NAMESPACE
  28            && ACE_HAS_VERSIONED_NAMESPACE == 1*/
  29
  30 #if defined (TAO_HAS_VERSIONED_NAMESPACE) && TAO_HAS_VERSIONED_NAMESPACE == 1
  31
  32 # ifndef TAO_VERSIONED_NAMESPACE_NAME
  33 #  include "tao/Version.h"
  34
  35 // Preprocessor symbols will not be expanded if they are
  36 // concatenated.  Force the preprocessor to expand them during the
  37 // argument prescan by calling a macro that itself calls another that
  38 // performs the actual concatenation.
  39 #  define TAO_MAKE_VERSIONED_NAMESPACE_NAME_IMPL(MAJOR,MINOR,MICRO) TAO_ ## MAJOR ## _ ## MINOR ## _ ## MICRO
  40 #  define TAO_MAKE_VERSIONED_NAMESPACE_NAME(MAJOR,MINOR,MICRO) TAO_MAKE_VERSIONED_NAMESPACE_NAME_IMPL(MAJOR,MINOR,MICRO)
  41 #  define TAO_VERSIONED_NAMESPACE_NAME TAO_MAKE_VERSIONED_NAMESPACE_NAME(TAO_MAJOR_VERSION,TAO_MINOR_VERSION,TAO_MICRO_VERSION)
  42 # endif  /* !TAO_VERSIONED_NAMESPACE_NAME */
  43
  44 # define TAO_BEGIN_VERSIONED_NAMESPACE_DECL namespace TAO_VERSIONED_NAMESPACE_NAME {
  45 # define TAO_END_VERSIONED_NAMESPACE_DECL } \
  46   using namespace TAO_VERSIONED_NAMESPACE_NAME;
  47
  48 #else
  49
  50 # define TAO_VERSIONED_NAMESPACE_NAME
  51 # define TAO_BEGIN_VERSIONED_NAMESPACE_DECL
  52 # define TAO_END_VERSIONED_NAMESPACE_DECL
  53
  54 #endif  /* TAO_HAS_VERSIONED_NAMESPACE */
  55
  56 #endif  /* !TAO_VERSIONED_NAMESPACE_H */