contrib/gcc-8.0/libstdc++-v3/include/profile/impl/profiler_state.h

   1 // -*- C++ -*-
   2 //
   3 // Copyright (C) 2009-2018 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 */