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// 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.
// +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
}
}
}
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