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3cbc7af0 | 1 | // Low-level functions for atomic operations: sh version -*- C++ -*- |
312209c6 | 2 | |
c1a03f03 | 3 | // Copyright (C) 1999, 2001, 2002, 2003, 2004, 2005, 2006 |
e27ce379 | 4 | // Free Software Foundation, Inc. |
312209c6 AO |
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 | |
9 | // Free Software Foundation; either version 2, or (at your option) | |
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 | ||
17 | // You should have received a copy of the GNU General Public License along | |
18 | // with this library; see the file COPYING. If not, write to the Free | |
83f51799 | 19 | // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, |
312209c6 AO |
20 | // USA. |
21 | ||
22 | // As a special exception, you may use this file as part of a free software | |
23 | // library without restriction. Specifically, if other files instantiate | |
24 | // templates or use macros or inline functions from this file, or you compile | |
25 | // this file and link it with other files to produce an executable, this | |
26 | // file does not by itself cause the resulting executable to be covered by | |
27 | // the GNU General Public License. This exception does not however | |
28 | // invalidate any other reasons why the executable file might be covered by | |
29 | // the GNU General Public License. | |
30 | ||
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31 | #ifdef __SH4A__ |
32 | ||
311635d1 BK |
33 | #ifndef _GLIBCXX_ATOMICITY_H |
34 | #define _GLIBCXX_ATOMICITY_H 1 | |
35 | ||
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36 | typedef int _Atomic_word; |
37 | ||
38 | static inline _Atomic_word | |
39 | __attribute__ ((__unused__)) | |
40 | __exchange_and_add (volatile _Atomic_word* __mem, int __val) | |
41 | { | |
42 | _Atomic_word __result; | |
43 | ||
44 | __asm__ __volatile__ | |
45 | ("0:\n" | |
46 | "\tmovli.l\t@%2,r0\n" | |
47 | "\tmov\tr0,%1\n" | |
48 | "\tadd\t%3,r0\n" | |
49 | "\tmovco.l\tr0,@%2\n" | |
50 | "\tbf\t0b" | |
51 | : "+m" (*__mem), "=r" (__result) | |
52 | : "r" (__mem), "rI08" (__val) | |
53 | : "r0"); | |
54 | ||
55 | return __result; | |
56 | } | |
57 | ||
58 | ||
59 | static inline void | |
60 | __attribute__ ((__unused__)) | |
61 | __atomic_add (volatile _Atomic_word* __mem, int __val) | |
62 | { | |
63 | asm("0:\n" | |
64 | "\tmovli.l\t@%1,r0\n" | |
65 | "\tadd\t%2,r0\n" | |
66 | "\tmovco.l\tr0,@%1\n" | |
67 | "\tbf\t0b" | |
68 | : "+m" (*__mem) | |
69 | : "r" (__mem), "rI08" (__val) | |
70 | : "r0"); | |
71 | } | |
72 | ||
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73 | #endif |
74 | ||
e27ce379 | 75 | #else /* !__SH4A__ */ |
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76 | |
77 | /* This is generic/atomicity.h */ | |
78 | ||
2e362c74 BK |
79 | #include <ext/atomicity.h> |
80 | #include <ext/concurrence.h> | |
312209c6 | 81 | |
c1a03f03 | 82 | namespace |
312209c6 | 83 | { |
2e362c74 | 84 | __gnu_cxx::__mutex atomic_mutex; |
c1a03f03 | 85 | } // anonymous namespace |
312209c6 | 86 | |
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87 | _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx) |
88 | ||
e27ce379 R |
89 | _Atomic_word |
90 | __attribute__ ((__unused__)) | |
91 | __exchange_and_add(volatile _Atomic_word* __mem, int __val) | |
92 | { | |
2e362c74 | 93 | __gnu_cxx::__scoped_lock sentry(atomic_mutex); |
e27ce379 R |
94 | _Atomic_word __result; |
95 | __result = *__mem; | |
96 | *__mem += __val; | |
e27ce379 R |
97 | return __result; |
98 | } | |
99 | ||
100 | void | |
101 | __attribute__ ((__unused__)) | |
102 | __atomic_add(volatile _Atomic_word* __mem, int __val) | |
103 | { __exchange_and_add(__mem, __val); } | |
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104 | |
105 | _GLIBCXX_END_NAMESPACE | |
e27ce379 R |
106 | |
107 | #endif /* !__SH4A__ */ |