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1 | /* Copyright (C) 2003-2022 Free Software Foundation, Inc. |
---|---|
2 | |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library. If not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #ifndef _AARCH64_ATOMIC_MACHINE_H |
20 | #define _AARCH64_ATOMIC_MACHINE_H 1 |
21 | |
22 | #define __HAVE_64B_ATOMICS 1 |
23 | #define USE_ATOMIC_COMPILER_BUILTINS 1 |
24 | #define ATOMIC_EXCHANGE_USES_CAS 0 |
25 | |
26 | /* Compare and exchange. |
27 | For all "bool" routines, we return FALSE if exchange succesful. */ |
28 | |
29 | # define __arch_compare_and_exchange_bool_8_int(mem, newval, oldval, model) \ |
30 | ({ \ |
31 | typeof (*mem) __oldval = (oldval); \ |
32 | !__atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, \ |
33 | model, __ATOMIC_RELAXED); \ |
34 | }) |
35 | |
36 | # define __arch_compare_and_exchange_bool_16_int(mem, newval, oldval, model) \ |
37 | ({ \ |
38 | typeof (*mem) __oldval = (oldval); \ |
39 | !__atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, \ |
40 | model, __ATOMIC_RELAXED); \ |
41 | }) |
42 | |
43 | # define __arch_compare_and_exchange_bool_32_int(mem, newval, oldval, model) \ |
44 | ({ \ |
45 | typeof (*mem) __oldval = (oldval); \ |
46 | !__atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, \ |
47 | model, __ATOMIC_RELAXED); \ |
48 | }) |
49 | |
50 | # define __arch_compare_and_exchange_bool_64_int(mem, newval, oldval, model) \ |
51 | ({ \ |
52 | typeof (*mem) __oldval = (oldval); \ |
53 | !__atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, \ |
54 | model, __ATOMIC_RELAXED); \ |
55 | }) |
56 | |
57 | # define __arch_compare_and_exchange_val_8_int(mem, newval, oldval, model) \ |
58 | ({ \ |
59 | typeof (*mem) __oldval = (oldval); \ |
60 | __atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, \ |
61 | model, __ATOMIC_RELAXED); \ |
62 | __oldval; \ |
63 | }) |
64 | |
65 | # define __arch_compare_and_exchange_val_16_int(mem, newval, oldval, model) \ |
66 | ({ \ |
67 | typeof (*mem) __oldval = (oldval); \ |
68 | __atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, \ |
69 | model, __ATOMIC_RELAXED); \ |
70 | __oldval; \ |
71 | }) |
72 | |
73 | # define __arch_compare_and_exchange_val_32_int(mem, newval, oldval, model) \ |
74 | ({ \ |
75 | typeof (*mem) __oldval = (oldval); \ |
76 | __atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, \ |
77 | model, __ATOMIC_RELAXED); \ |
78 | __oldval; \ |
79 | }) |
80 | |
81 | # define __arch_compare_and_exchange_val_64_int(mem, newval, oldval, model) \ |
82 | ({ \ |
83 | typeof (*mem) __oldval = (oldval); \ |
84 | __atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, \ |
85 | model, __ATOMIC_RELAXED); \ |
86 | __oldval; \ |
87 | }) |
88 | |
89 | |
90 | /* Compare and exchange with "acquire" semantics, ie barrier after. */ |
91 | |
92 | # define atomic_compare_and_exchange_bool_acq(mem, new, old) \ |
93 | __atomic_bool_bysize (__arch_compare_and_exchange_bool, int, \ |
94 | mem, new, old, __ATOMIC_ACQUIRE) |
95 | |
96 | # define atomic_compare_and_exchange_val_acq(mem, new, old) \ |
97 | __atomic_val_bysize (__arch_compare_and_exchange_val, int, \ |
98 | mem, new, old, __ATOMIC_ACQUIRE) |
99 | |
100 | /* Compare and exchange with "release" semantics, ie barrier before. */ |
101 | |
102 | # define atomic_compare_and_exchange_val_rel(mem, new, old) \ |
103 | __atomic_val_bysize (__arch_compare_and_exchange_val, int, \ |
104 | mem, new, old, __ATOMIC_RELEASE) |
105 | |
106 | |
107 | /* Atomic exchange (without compare). */ |
108 | |
109 | # define __arch_exchange_8_int(mem, newval, model) \ |
110 | __atomic_exchange_n (mem, newval, model) |
111 | |
112 | # define __arch_exchange_16_int(mem, newval, model) \ |
113 | __atomic_exchange_n (mem, newval, model) |
114 | |
115 | # define __arch_exchange_32_int(mem, newval, model) \ |
116 | __atomic_exchange_n (mem, newval, model) |
117 | |
118 | # define __arch_exchange_64_int(mem, newval, model) \ |
119 | __atomic_exchange_n (mem, newval, model) |
120 | |
121 | # define atomic_exchange_acq(mem, value) \ |
122 | __atomic_val_bysize (__arch_exchange, int, mem, value, __ATOMIC_ACQUIRE) |
123 | |
124 | # define atomic_exchange_rel(mem, value) \ |
125 | __atomic_val_bysize (__arch_exchange, int, mem, value, __ATOMIC_RELEASE) |
126 | |
127 | |
128 | /* Atomically add value and return the previous (unincremented) value. */ |
129 | |
130 | # define __arch_exchange_and_add_8_int(mem, value, model) \ |
131 | __atomic_fetch_add (mem, value, model) |
132 | |
133 | # define __arch_exchange_and_add_16_int(mem, value, model) \ |
134 | __atomic_fetch_add (mem, value, model) |
135 | |
136 | # define __arch_exchange_and_add_32_int(mem, value, model) \ |
137 | __atomic_fetch_add (mem, value, model) |
138 | |
139 | # define __arch_exchange_and_add_64_int(mem, value, model) \ |
140 | __atomic_fetch_add (mem, value, model) |
141 | |
142 | # define atomic_exchange_and_add_acq(mem, value) \ |
143 | __atomic_val_bysize (__arch_exchange_and_add, int, mem, value, \ |
144 | __ATOMIC_ACQUIRE) |
145 | |
146 | # define atomic_exchange_and_add_rel(mem, value) \ |
147 | __atomic_val_bysize (__arch_exchange_and_add, int, mem, value, \ |
148 | __ATOMIC_RELEASE) |
149 | |
150 | /* Barrier macro. */ |
151 | #define atomic_full_barrier() __sync_synchronize() |
152 | |
153 | #endif |
154 |
Warning: This file is not a C or C++ file. It does not have highlighting.