libstdc++

profiler_state.h
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1 // -*- C++ -*-
2 //
3 // Copyright (C) 2009-2013 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 */