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  1. // -*- C++ -*-
  2. //
  3. // Copyright (C) 2009-2015 Free Software Foundation, Inc.
  4. //
  5. // This file is part of the GNU ISO C++ Library.  This library is free
  6. // software; you can redistribute it and/or modify it under the
  7. // terms of the GNU General Public License as published by the
  8. // Free Software Foundation; either version 3, or (at your option)
  9. // any later version.
  10. //
  11. // This library is distributed in the hope that it will be useful,
  12. // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13. // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14. // GNU General Public License for more details.
  15.  
  16. // Under Section 7 of GPL version 3, you are granted additional
  17. // permissions described in the GCC Runtime Library Exception, version
  18. // 3.1, as published by the Free Software Foundation.
  19.  
  20. // You should have received a copy of the GNU General Public License along
  21. // with this library; see the file COPYING3.  If not see
  22. // <http://www.gnu.org/licenses/>.
  23.  
  24. /** @file profile/impl/profiler_state.h
  25.  *  @brief Global profiler state.
  26.  */
  27.  
  28. // Written by Lixia Liu and Silvius Rus.
  29.  
  30. #ifndef _GLIBCXX_PROFILE_PROFILER_STATE_H
  31. #define _GLIBCXX_PROFILE_PROFILER_STATE_H 1
  32.  
  33. namespace __gnu_profile
  34. {
  35.   enum __state_type { __ON, __OFF, __INVALID };
  36.  
  37.   _GLIBCXX_PROFILE_DEFINE_DATA(__state_type, __state, __INVALID);
  38.  
  39.   inline bool
  40.   __turn(__state_type __s)
  41.   {
  42.     __state_type inv(__INVALID);
  43.     return __atomic_compare_exchange_n(&_GLIBCXX_PROFILE_DATA(__state),
  44.                                        &inv, __s, false, __ATOMIC_ACQ_REL,
  45.                                        __ATOMIC_RELAXED);
  46.   }
  47.  
  48.   inline bool
  49.   __turn_on()
  50.   { return __turn(__ON); }
  51.  
  52.   inline bool
  53.   __turn_off()
  54.   { return __turn(__OFF); }
  55.  
  56.   inline bool
  57.   __is_on()
  58.   { return _GLIBCXX_PROFILE_DATA(__state) == __ON; }
  59.  
  60.   inline bool
  61.   __is_off()
  62.   { return _GLIBCXX_PROFILE_DATA(__state) == __OFF; }
  63.  
  64.   inline bool
  65.   __is_invalid()
  66.   { return _GLIBCXX_PROFILE_DATA(__state) == __INVALID; }
  67.  
  68. } // end namespace __gnu_profile
  69. #endif /* _GLIBCXX_PROFILE_PROFILER_STATE_H */
  70.