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1 | // Low-level type for atomic operations -*- C++ -*- |
2 | ||
8d9254fc | 3 | // Copyright (C) 2004-2020 Free Software Foundation, Inc. |
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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 | |
748086b7 | 8 | // Free Software Foundation; either version 3, or (at your option) |
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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 | ||
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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/>. | |
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24 | |
25 | #ifndef _GLIBCXX_ATOMIC_WORD_H | |
26 | #define _GLIBCXX_ATOMIC_WORD_H 1 | |
27 | ||
28 | #ifdef __arch64__ | |
29 | typedef long _Atomic_word; | |
30 | #else | |
31 | typedef int _Atomic_word; | |
32 | #endif | |
33 | ||
445cf5eb JM |
34 | #if defined(__sparc_v9__) |
35 | // These are necessary under the V9 RMO model, though it is almost never | |
36 | // used in userspace. | |
37 | #define _GLIBCXX_READ_MEM_BARRIER \ | |
38 | __asm __volatile ("membar #LoadLoad":::"memory") | |
39 | #define _GLIBCXX_WRITE_MEM_BARRIER \ | |
40 | __asm __volatile ("membar #StoreStore":::"memory") | |
41 | ||
42 | #elif defined(__sparc_v8__) | |
43 | // This is necessary under the PSO model. | |
44 | #define _GLIBCXX_WRITE_MEM_BARRIER __asm __volatile ("stbar":::"memory") | |
45 | ||
46 | #endif | |
47 | ||
f92ab29f | 48 | #endif |