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1 | // Low-level functions for atomic operations: version for CPUs providing |
2 | // atomic builtins -*- C++ -*- | |
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748086b7 | 4 | // Copyright (C) 2006, 2009 Free Software Foundation, Inc. |
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5 | // |
6 | // This file is part of the GNU ISO C++ Library. This library is free | |
7 | // software; you can redistribute it and/or modify it under the | |
8 | // terms of the GNU General Public License as published by the | |
748086b7 | 9 | // Free Software Foundation; either version 3, or (at your option) |
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10 | // any later version. |
11 | ||
12 | // This library is distributed in the hope that it will be useful, | |
13 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | // GNU General Public License for more details. | |
16 | ||
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17 | // Under Section 7 of GPL version 3, you are granted additional |
18 | // permissions described in the GCC Runtime Library Exception, version | |
19 | // 3.1, as published by the Free Software Foundation. | |
20 | ||
21 | // You should have received a copy of the GNU General Public License and | |
22 | // a copy of the GCC Runtime Library Exception along with this program; | |
23 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
24 | // <http://www.gnu.org/licenses/>. | |
735bce7e | 25 | |
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26 | /** @file ext/atomicity.h |
27 | * This file is a GNU extension to the Standard C++ Library. | |
28 | */ | |
29 | ||
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30 | #include <bits/c++config.h> |
31 | #include <bits/atomic_word.h> | |
735bce7e | 32 | |
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33 | _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx) |
34 | ||
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35 | _Atomic_word |
36 | __attribute__ ((__unused__)) | |
37 | __exchange_and_add(volatile _Atomic_word* __mem, int __val) | |
38 | { return __sync_fetch_and_add(__mem, __val); } | |
39 | ||
40 | void | |
41 | __attribute__ ((__unused__)) | |
42 | __atomic_add(volatile _Atomic_word* __mem, int __val) | |
43 | { __sync_fetch_and_add(__mem, __val); } | |
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44 | |
45 | _GLIBCXX_END_NAMESPACE |