| // 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 := addr.Load() |
| n := o & val |
| if atomic.CompareAndSwapUint32(&addr.value, o, n) { |
| break |
| } |
| } |
| } |
| |
| //go:nosplit |
| func OrUint32(addr *Uint32, val uint32) { |
| for { |
| o := addr.Load() |
| n := o | val |
| if atomic.CompareAndSwapUint32(&addr.value, o, n) { |
| break |
| } |
| } |
| } |
| |
| //go:nosplit |
| func XorUint32(addr *Uint32, val uint32) { |
| for { |
| o := addr.Load() |
| n := o ^ val |
| if atomic.CompareAndSwapUint32(&addr.value, o, n) { |
| break |
| } |
| } |
| } |
| |
| //go:nosplit |
| func CompareAndSwapUint32(addr *Uint32, old, new uint32) (prev uint32) { |
| for { |
| prev = addr.Load() |
| if prev != old { |
| return |
| } |
| if atomic.CompareAndSwapUint32(&addr.value, old, new) { |
| return |
| } |
| } |
| } |
| |
| //go:nosplit |
| func AndUint64(addr *Uint64, val uint64) { |
| for { |
| o := atomic.LoadUint64(addr.ptr()) |
| n := o & val |
| if atomic.CompareAndSwapUint64(addr.ptr(), o, n) { |
| break |
| } |
| } |
| } |
| |
| //go:nosplit |
| func OrUint64(addr *Uint64, val uint64) { |
| for { |
| o := atomic.LoadUint64(addr.ptr()) |
| n := o | val |
| if atomic.CompareAndSwapUint64(addr.ptr(), o, n) { |
| break |
| } |
| } |
| } |
| |
| //go:nosplit |
| func XorUint64(addr *Uint64, val uint64) { |
| for { |
| o := atomic.LoadUint64(addr.ptr()) |
| n := o ^ val |
| if atomic.CompareAndSwapUint64(addr.ptr(), o, n) { |
| break |
| } |
| } |
| } |
| |
| //go:nosplit |
| func CompareAndSwapUint64(addr *Uint64, old, new uint64) (prev uint64) { |
| for { |
| prev = atomic.LoadUint64(addr.ptr()) |
| if prev != old { |
| return |
| } |
| if atomic.CompareAndSwapUint64(addr.ptr(), old, new) { |
| return |
| } |
| } |
| } |