ACE/ace/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 ACE_VERSIONED_NAMESPACE_H
  16 #define ACE_VERSIONED_NAMESPACE_H
  17
  18 #ifndef ACE_CONFIG_MACROS_H
  19 # error This header is only meant to be included by or after "ace/config-lite.h".
  20 #endif  /* !ACE_CONFIG_LITE_H */
  21
  22
  23 #if defined (ACE_HAS_VERSIONED_NAMESPACE) && ACE_HAS_VERSIONED_NAMESPACE == 1
  24
  25 # ifndef ACE_VERSIONED_NAMESPACE_NAME
  26 //#  include "ace/Version.h"
  27
  28 // Preprocessor symbols will not be expanded if they are
  29 // concatenated.  Force the preprocessor to expand them during the
  30 // argument prescan by calling a macro that itself calls another that
  31 // performs the actual concatenation.
  32 #  define ACE_MAKE_VERSIONED_NAMESPACE_NAME_IMPL(MAJOR,MINOR,MICRO) ACE_ ## MAJOR ## _ ## MINOR ## _ ## MICRO
  33 #  define ACE_MAKE_VERSIONED_NAMESPACE_NAME(MAJOR,MINOR,MICRO) ACE_MAKE_VERSIONED_NAMESPACE_NAME_IMPL(MAJOR,MINOR,MICRO)
  34 #  define ACE_VERSIONED_NAMESPACE_NAME ACE_MAKE_VERSIONED_NAMESPACE_NAME(ACE_MAJOR_VERSION,ACE_MINOR_VERSION,ACE_MICRO_VERSION)
  35 # endif  /* !ACE_VERSIONED_NAMESPACE_NAME */
  36
  37 # define ACE_BEGIN_VERSIONED_NAMESPACE_DECL namespace ACE_VERSIONED_NAMESPACE_NAME {
  38 # define ACE_END_VERSIONED_NAMESPACE_DECL } \
  39   using namespace ACE_VERSIONED_NAMESPACE_NAME;
  40
  41 #else
  42
  43 # define ACE_VERSIONED_NAMESPACE_NAME
  44 # define ACE_BEGIN_VERSIONED_NAMESPACE_DECL
  45 # define ACE_END_VERSIONED_NAMESPACE_DECL
  46
  47 #endif  /* ACE_HAS_VERSIONED_NAMESPACE */
  48
  49 #endif  /* !ACE_VERSIONED_NAMESPACE_H */