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1 | // Low-level functions for atomic operations: AIX version -*- C++ -*- | |
2 | ||
3 | // Copyright (C) 2000-2014 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 and | |
21 | // a copy of the GCC Runtime Library Exception along with this program; | |
22 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
23 | // <http://www.gnu.org/licenses/>. | |
24 | ||
25 | #include <ext/atomicity.h> | |
26 | ||
27 | /* We cannot use the cpu/powerpc/bits/atomicity.h inline assembly | |
28 | definitions for these operations since they depend on operations | |
29 | that are not available on the original POWER architecture. AIX | |
30 | still runs on the POWER architecture, so it would be incorrect to | |
31 | assume the existence of these instructions. | |
32 | ||
33 | The definition of _Atomic_word must match the type pointed to by | |
34 | atomic_p in <sys/atomic_op.h>. */ | |
35 | ||
36 | extern "C" | |
37 | { | |
38 | #include <sys/atomic_op.h> | |
39 | } | |
40 | ||
41 | namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) | |
42 | { | |
43 | _GLIBCXX_BEGIN_NAMESPACE_VERSION | |
44 | ||
45 | _Atomic_word | |
46 | __attribute__ ((__unused__)) | |
47 | __exchange_and_add (volatile _Atomic_word* __mem, int __val) throw () | |
48 | { return ::fetch_and_add(const_cast<atomic_p>(__mem), __val); } | |
49 | ||
50 | void | |
51 | __attribute__ ((__unused__)) | |
52 | __atomic_add (volatile _Atomic_word* __mem, int __val) throw () | |
53 | { (void) ::fetch_and_add(const_cast<atomic_p>(__mem), __val); } | |
54 | ||
55 | _GLIBCXX_END_NAMESPACE_VERSION | |
56 | } // namespace |