libstdc++
profiler_state.h
Go to the documentation of this file.
00001 // -*- C++ -*-
00002 //
00003 // Copyright (C) 2009, 2010 Free Software Foundation, Inc.
00004 //
00005 // This file is part of the GNU ISO C++ Library.  This library is free
00006 // software; you can redistribute it and/or modify it under the terms
00007 // of the GNU General Public License as published by the Free Software
00008 // Foundation; either version 2, or (at your option) any later
00009 // version.
00010 
00011 // This library is distributed in the hope that it will be useful, but
00012 // WITHOUT ANY WARRANTY; without even the implied warranty of
00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014 // General Public License for more details.
00015 
00016 // You should have received a copy of the GNU General Public License
00017 // along with this library; see the file COPYING.  If not, write to
00018 // the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
00019 // MA 02111-1307, USA.
00020 
00021 // As a special exception, you may use this file as part of a free
00022 // software library without restriction.  Specifically, if other files
00023 // instantiate templates or use macros or inline functions from this
00024 // file, or you compile this file and link it with other files to
00025 // produce an executable, this file does not by itself cause the
00026 // resulting executable to be covered by the GNU General Public
00027 // License.  This exception does not however invalidate any other
00028 // reasons why the executable file might be covered by the GNU General
00029 // Public License.
00030 
00031 /** @file profile/impl/profiler_state.h
00032  *  @brief Global profiler state.
00033  */
00034 
00035 // Written by Lixia Liu and Silvius Rus.
00036 
00037 #ifndef _GLIBCXX_PROFILE_PROFILER_STATE_H
00038 #define _GLIBCXX_PROFILE_PROFILER_STATE_H 1
00039 
00040 namespace __gnu_profile
00041 {
00042   enum __state_type { __ON, __OFF, __INVALID };
00043 
00044   _GLIBCXX_PROFILE_DEFINE_DATA(__state_type, __state, __INVALID);
00045 
00046   inline bool
00047   __turn(__state_type __s)
00048   { return (_GLIBCXX_PROFILE_DATA(__state)
00049         == __sync_val_compare_and_swap(&_GLIBCXX_PROFILE_DATA(__state),
00050                        __INVALID, __s)); }
00051 
00052   inline bool
00053   __turn_on()
00054   { return __turn(__ON); }
00055 
00056   inline bool
00057   __turn_off()
00058   { return __turn(__OFF); }
00059 
00060   inline bool
00061   __is_on()
00062   { return _GLIBCXX_PROFILE_DATA(__state) == __ON; }
00063 
00064   inline bool
00065   __is_off()
00066   { return _GLIBCXX_PROFILE_DATA(__state) == __OFF; }
00067 
00068   inline bool
00069   __is_invalid()
00070   { return _GLIBCXX_PROFILE_DATA(__state) == __INVALID; }
00071 
00072 } // end namespace __gnu_profile
00073 #endif /* _GLIBCXX_PROFILE_PROFILER_STATE_H */