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syncs, all: move to using Go's new atomic types instead of ours

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Fixes #5185

Change-Id: I850dd532559af78c3895e2924f8237ccc328449d
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2022-08-03 21:51:02 -07:00
committed by Brad Fitzpatrick
parent 9bb5a038e5
commit 4950fe60bd
20 changed files with 101 additions and 143 deletions
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36
syncs/syncs.go
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@@ -68,42 +68,6 @@ func (wg *WaitGroupChan) Decr() {
// Wait blocks until the WaitGroupChan counter is zero.
func (wg *WaitGroupChan) Wait() { <-wg.done }
// AtomicBool is an atomic boolean.
type AtomicBool int32
func (b *AtomicBool) Set(v bool) {
var n int32
if v {
n = 1
}
atomic.StoreInt32((*int32)(b), n)
}
// Swap sets b to v and reports whether it changed.
func (b *AtomicBool) Swap(v bool) (changed bool) {
var n int32
if v {
n = 1
}
old := atomic.SwapInt32((*int32)(b), n)
return old != n
}
func (b *AtomicBool) Get() bool {
return atomic.LoadInt32((*int32)(b)) != 0
}
// AtomicUint32 is an atomic uint32.
type AtomicUint32 uint32
func (b *AtomicUint32) Set(v uint32) {
atomic.StoreUint32((*uint32)(b), v)
}
func (b *AtomicUint32) Get() uint32 {
return atomic.LoadUint32((*uint32)(b))
}
// Semaphore is a counting semaphore.
//
// Use NewSemaphore to create one.