1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
|
// Copyright 2018 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build !amd64 && !arm64
// +build !amd64,!arm64
package atomicbitops
import (
"sync/atomic"
)
//go:nosplit
func AndUint32(addr *uint32, val uint32) {
for {
o := atomic.LoadUint32(addr)
n := o & val
if atomic.CompareAndSwapUint32(addr, o, n) {
break
}
}
}
//go:nosplit
func OrUint32(addr *uint32, val uint32) {
for {
o := atomic.LoadUint32(addr)
n := o | val
if atomic.CompareAndSwapUint32(addr, o, n) {
break
}
}
}
//go:nosplit
func XorUint32(addr *uint32, val uint32) {
for {
o := atomic.LoadUint32(addr)
n := o ^ val
if atomic.CompareAndSwapUint32(addr, o, n) {
break
}
}
}
//go:nosplit
func CompareAndSwapUint32(addr *uint32, old, new uint32) (prev uint32) {
for {
prev = atomic.LoadUint32(addr)
if prev != old {
return
}
if atomic.CompareAndSwapUint32(addr, old, new) {
return
}
}
}
//go:nosplit
func AndUint64(addr *uint64, val uint64) {
for {
o := atomic.LoadUint64(addr)
n := o & val
if atomic.CompareAndSwapUint64(addr, o, n) {
break
}
}
}
//go:nosplit
func OrUint64(addr *uint64, val uint64) {
for {
o := atomic.LoadUint64(addr)
n := o | val
if atomic.CompareAndSwapUint64(addr, o, n) {
break
}
}
}
//go:nosplit
func XorUint64(addr *uint64, val uint64) {
for {
o := atomic.LoadUint64(addr)
n := o ^ val
if atomic.CompareAndSwapUint64(addr, o, n) {
break
}
}
}
//go:nosplit
func CompareAndSwapUint64(addr *uint64, old, new uint64) (prev uint64) {
for {
prev = atomic.LoadUint64(addr)
if prev != old {
return
}
if atomic.CompareAndSwapUint64(addr, old, new) {
return
}
}
}
|
