forked from Shiloh/githaven
115 lines
2.5 KiB
Go
115 lines
2.5 KiB
Go
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// Copyright 2013, Google Inc. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package sync2
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import (
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"sync"
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"sync/atomic"
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"time"
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)
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type AtomicInt32 int32
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func (i *AtomicInt32) Add(n int32) int32 {
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return atomic.AddInt32((*int32)(i), n)
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}
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func (i *AtomicInt32) Set(n int32) {
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atomic.StoreInt32((*int32)(i), n)
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}
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func (i *AtomicInt32) Get() int32 {
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return atomic.LoadInt32((*int32)(i))
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}
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func (i *AtomicInt32) CompareAndSwap(oldval, newval int32) (swapped bool) {
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return atomic.CompareAndSwapInt32((*int32)(i), oldval, newval)
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}
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type AtomicUint32 uint32
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func (i *AtomicUint32) Add(n uint32) uint32 {
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return atomic.AddUint32((*uint32)(i), n)
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}
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func (i *AtomicUint32) Set(n uint32) {
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atomic.StoreUint32((*uint32)(i), n)
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}
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func (i *AtomicUint32) Get() uint32 {
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return atomic.LoadUint32((*uint32)(i))
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}
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func (i *AtomicUint32) CompareAndSwap(oldval, newval uint32) (swapped bool) {
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return atomic.CompareAndSwapUint32((*uint32)(i), oldval, newval)
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}
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type AtomicInt64 int64
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func (i *AtomicInt64) Add(n int64) int64 {
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return atomic.AddInt64((*int64)(i), n)
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}
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func (i *AtomicInt64) Set(n int64) {
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atomic.StoreInt64((*int64)(i), n)
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}
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func (i *AtomicInt64) Get() int64 {
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return atomic.LoadInt64((*int64)(i))
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}
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func (i *AtomicInt64) CompareAndSwap(oldval, newval int64) (swapped bool) {
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return atomic.CompareAndSwapInt64((*int64)(i), oldval, newval)
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}
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type AtomicDuration int64
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func (d *AtomicDuration) Add(duration time.Duration) time.Duration {
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return time.Duration(atomic.AddInt64((*int64)(d), int64(duration)))
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}
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func (d *AtomicDuration) Set(duration time.Duration) {
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atomic.StoreInt64((*int64)(d), int64(duration))
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}
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func (d *AtomicDuration) Get() time.Duration {
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return time.Duration(atomic.LoadInt64((*int64)(d)))
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}
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func (d *AtomicDuration) CompareAndSwap(oldval, newval time.Duration) (swapped bool) {
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return atomic.CompareAndSwapInt64((*int64)(d), int64(oldval), int64(newval))
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}
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// AtomicString gives you atomic-style APIs for string, but
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// it's only a convenience wrapper that uses a mutex. So, it's
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// not as efficient as the rest of the atomic types.
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type AtomicString struct {
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mu sync.Mutex
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str string
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}
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func (s *AtomicString) Set(str string) {
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s.mu.Lock()
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s.str = str
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s.mu.Unlock()
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}
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func (s *AtomicString) Get() string {
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s.mu.Lock()
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str := s.str
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s.mu.Unlock()
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return str
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}
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func (s *AtomicString) CompareAndSwap(oldval, newval string) (swqpped bool) {
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s.mu.Lock()
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defer s.mu.Unlock()
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if s.str == oldval {
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s.str = newval
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return true
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}
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return false
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}
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