libstdc++-v3/include/profile/impl/profiler_state.h

   1 // -*- C++ -*-
   2 //
   3 // Copyright (C) 2009, 2010 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 terms
   7 // of the GNU General Public License as published by the Free Software
   8 // Foundation; either version 2, or (at your option) any later
   9 // version.
  10
  11 // This library is distributed in the hope that it will be useful, but
  12 // WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 // General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License
  17 // along with this library; see the file COPYING.  If not, write to
  18 // the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
  19 // MA 02111-1307, USA.
  20
  21 // As a special exception, you may use this file as part of a free
  22 // software library without restriction.  Specifically, if other files
  23 // instantiate templates or use macros or inline functions from this
  24 // file, or you compile this file and link it with other files to
  25 // produce an executable, this file does not by itself cause the
  26 // resulting executable to be covered by the GNU General Public
  27 // License.  This exception does not however invalidate any other
  28 // reasons why the executable file might be covered by the GNU General
  29 // Public License.
  30
  31 /** @file profile/impl/profiler_state.h
  32  *  @brief Global profiler state.
  33  */
  34
  35 // Written by Lixia Liu and Silvius Rus.
  36
  37 #ifndef _GLIBCXX_PROFILE_PROFILER_STATE_H
  38 #define _GLIBCXX_PROFILE_PROFILER_STATE_H 1
  39
  40 namespace __gnu_profile
  41 {
  42   enum __state_type { __ON, __OFF, __INVALID };
  43
  44   _GLIBCXX_PROFILE_DEFINE_DATA(__state_type, __state, __INVALID);
  45
  46   inline bool
  47   __turn(__state_type __s)
  48   { return (_GLIBCXX_PROFILE_DATA(__state)
  49             == __sync_val_compare_and_swap(&_GLIBCXX_PROFILE_DATA(__state),
  50                                            __INVALID, __s)); }
  51
  52   inline bool
  53   __turn_on()
  54   { return __turn(__ON); }
  55
  56   inline bool
  57   __turn_off()
  58   { return __turn(__OFF); }
  59
  60   inline bool
  61   __is_on()
  62   { return _GLIBCXX_PROFILE_DATA(__state) == __ON; }
  63
  64   inline bool
  65   __is_off()
  66   { return _GLIBCXX_PROFILE_DATA(__state) == __OFF; }
  67
  68   inline bool
  69   __is_invalid()
  70   { return _GLIBCXX_PROFILE_DATA(__state) == __INVALID; }
  71
  72 } // end namespace __gnu_profile
  73 #endif /* _GLIBCXX_PROFILE_PROFILER_STATE_H */