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733f25e6 | 1 | /* Copyright (C) 2002, 2003 Free Software Foundation, Inc. |
76a50749 UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. | |
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, write to the Free | |
17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
18 | 02111-1307 USA. */ | |
19 | ||
20 | #ifndef _ATOMIC_H | |
21 | #define _ATOMIC_H 1 | |
22 | ||
23 | #include <stdlib.h> | |
24 | ||
25 | #include <bits/atomic.h> | |
26 | ||
27 | ||
28 | #ifndef atomic_compare_and_exchange_acq | |
29 | # define atomic_compare_and_exchange_acq(mem, newval, oldval) \ | |
d45e8740 | 30 | ({ __typeof (__arch_compare_and_exchange_32_acq (mem, newval, oldval)) \ |
76a50749 UD |
31 | __result; \ |
32 | if (sizeof (*mem) == 1) \ | |
33 | __result = __arch_compare_and_exchange_8_acq (mem, newval, oldval); \ | |
34 | else if (sizeof (*mem) == 2) \ | |
35 | __result = __arch_compare_and_exchange_16_acq (mem, newval, oldval); \ | |
36 | else if (sizeof (*mem) == 4) \ | |
37 | __result = __arch_compare_and_exchange_32_acq (mem, newval, oldval); \ | |
38 | else if (sizeof (*mem) == 8) \ | |
39 | __result = __arch_compare_and_exchange_64_acq (mem, newval, oldval); \ | |
40 | else \ | |
41 | abort (); \ | |
42 | __result; }) | |
43 | #endif | |
44 | ||
45 | ||
46 | #ifndef atomic_compare_and_exchange_rel | |
47 | # define atomic_compare_and_exchange_rel(mem, oldval, newval) \ | |
e3ec8904 | 48 | atomic_compare_and_exchange_acq (mem, oldval, newval) |
76a50749 UD |
49 | #endif |
50 | ||
51 | ||
52 | #ifndef atomic_exchange_and_add | |
53 | # define atomic_exchange_and_add(mem, value) \ | |
54 | ({ __typeof (*mem) __oldval; \ | |
55 | __typeof (mem) __memp = (mem); \ | |
56 | __typeof (*mem) __value = (value); \ | |
57 | \ | |
58 | do \ | |
59 | __oldval = (*__memp); \ | |
e3ec8904 UD |
60 | while (atomic_compare_and_exchange_acq (__memp, __oldval + __value, \ |
61 | __oldval)); \ | |
76a50749 | 62 | \ |
7ce5c164 | 63 | __oldval + __value; }) |
76a50749 UD |
64 | #endif |
65 | ||
66 | ||
67 | #ifndef atomic_add | |
e3ec8904 | 68 | # define atomic_add(mem, value) (void) atomic_exchange_and_add (mem, value) |
76a50749 UD |
69 | #endif |
70 | ||
71 | ||
72 | #ifndef atomic_increment | |
73 | # define atomic_increment(mem) atomic_add (mem, 1) | |
74 | #endif | |
75 | ||
76 | ||
ec609a8e UD |
77 | #ifndef atomic_increment_and_test |
78 | # define atomic_increment_and_test(mem) \ | |
79 | (atomic_exchange_and_add (mem, 1) == 0) | |
80 | #endif | |
81 | ||
82 | ||
76a50749 UD |
83 | #ifndef atomic_decrement |
84 | # define atomic_decrement(mem) atomic_add (mem, -1) | |
85 | #endif | |
86 | ||
87 | ||
ec609a8e UD |
88 | #ifndef atomic_decrement_and_test |
89 | # define atomic_decrement_and_test(mem) \ | |
90 | (atomic_exchange_and_add (mem, -1) == 0) | |
91 | #endif | |
92 | ||
93 | ||
5cd09cd6 | 94 | #ifndef atomic_add_negative |
ec609a8e UD |
95 | # define atomic_add_negative(mem, value) \ |
96 | (atomic_exchange_and_add (mem, value) < 0) | |
97 | #endif | |
98 | ||
99 | ||
100 | #ifndef atomic_add_zero | |
101 | # define atomic_add_zero(mem, value) \ | |
102 | (atomic_exchange_and_add (mem, value) == 0) | |
103 | #endif | |
104 | ||
105 | ||
0289bef9 UD |
106 | #ifndef atomic_bit_set |
107 | # define atomic_bit_set(mem, bit) \ | |
ec609a8e UD |
108 | (void) atomic_bit_test_set(mem, bit) |
109 | #endif | |
110 | ||
111 | ||
112 | #ifndef atomic_bit_test_set | |
113 | # define atomic_bit_test_set(mem, bit) \ | |
114 | ({ __typeof (*mem) __oldval; \ | |
115 | __typeof (mem) __memp = (mem); \ | |
116 | __typeof (*mem) __mask = (1 << (bit)); \ | |
117 | \ | |
118 | do \ | |
119 | __oldval = (*__memp); \ | |
120 | while (atomic_compare_and_exchange_acq (__memp, \ | |
121 | __oldval | __mask, __oldval)); \ | |
76a50749 | 122 | \ |
ec609a8e | 123 | __oldval & __mask; }) |
76a50749 UD |
124 | #endif |
125 | ||
126 | ||
127 | #ifndef atomic_full_barrier | |
733f25e6 | 128 | # define atomic_full_barrier() __asm ("" ::: "memory") |
76a50749 UD |
129 | #endif |
130 | ||
131 | ||
132 | #ifndef atomic_read_barrier | |
733f25e6 | 133 | # define atomic_read_barrier() atomic_full_barrier() |
76a50749 UD |
134 | #endif |
135 | ||
136 | ||
137 | #ifndef atomic_write_barrier | |
733f25e6 | 138 | # define atomic_write_barrier() atomic_full_barrier() |
76a50749 UD |
139 | #endif |
140 | ||
141 | #endif /* atomic.h */ |