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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build race
package atomic
import (
"runtime"
"unsafe"
)
var mtx uint32 = 1 // same for all
func CompareAndSwapInt32(val *int32, old, new int32) bool {
return CompareAndSwapUint32((*uint32)(unsafe.Pointer(val)), uint32(old), uint32(new))
}
func CompareAndSwapUint32(val *uint32, old, new uint32) (swapped bool) {
swapped = false
runtime.RaceSemacquire(&mtx)
runtime.RaceAcquire(unsafe.Pointer(val))
if *val == old {
*val = new
swapped = true
runtime.RaceReleaseMerge(unsafe.Pointer(val))
}
runtime.RaceSemrelease(&mtx)
return
}
func CompareAndSwapInt64(val *int64, old, new int64) bool {
return CompareAndSwapUint64((*uint64)(unsafe.Pointer(val)), uint64(old), uint64(new))
}
func CompareAndSwapUint64(val *uint64, old, new uint64) (swapped bool) {
swapped = false
runtime.RaceSemacquire(&mtx)
runtime.RaceAcquire(unsafe.Pointer(val))
if *val == old {
*val = new
swapped = true
runtime.RaceReleaseMerge(unsafe.Pointer(val))
}
runtime.RaceSemrelease(&mtx)
return
}
func CompareAndSwapPointer(val *unsafe.Pointer, old, new unsafe.Pointer) (swapped bool) {
swapped = false
runtime.RaceSemacquire(&mtx)
runtime.RaceAcquire(unsafe.Pointer(val))
if *val == old {
*val = new
swapped = true
runtime.RaceReleaseMerge(unsafe.Pointer(val))
}
runtime.RaceSemrelease(&mtx)
return
}
func CompareAndSwapUintptr(val *uintptr, old, new uintptr) (swapped bool) {
swapped = false
runtime.RaceSemacquire(&mtx)
runtime.RaceAcquire(unsafe.Pointer(val))
if *val == old {
*val = new
swapped = true
runtime.RaceReleaseMerge(unsafe.Pointer(val))
}
runtime.RaceSemrelease(&mtx)
return
}
func AddInt32(val *int32, delta int32) int32 {
return int32(AddUint32((*uint32)(unsafe.Pointer(val)), uint32(delta)))
}
func AddUint32(val *uint32, delta uint32) (new uint32) {
runtime.RaceSemacquire(&mtx)
runtime.RaceAcquire(unsafe.Pointer(val))
*val = *val + delta
new = *val
runtime.RaceReleaseMerge(unsafe.Pointer(val))
runtime.RaceSemrelease(&mtx)
return
}
func AddInt64(val *int64, delta int64) int64 {
return int64(AddUint64((*uint64)(unsafe.Pointer(val)), uint64(delta)))
}
func AddUint64(val *uint64, delta uint64) (new uint64) {
runtime.RaceSemacquire(&mtx)
runtime.RaceAcquire(unsafe.Pointer(val))
*val = *val + delta
new = *val
runtime.RaceReleaseMerge(unsafe.Pointer(val))
runtime.RaceSemrelease(&mtx)
return
}
func AddUintptr(val *uintptr, delta uintptr) (new uintptr) {
runtime.RaceSemacquire(&mtx)
runtime.RaceAcquire(unsafe.Pointer(val))
*val = *val + delta
new = *val
runtime.RaceReleaseMerge(unsafe.Pointer(val))
runtime.RaceSemrelease(&mtx)
return
}
func LoadInt32(addr *int32) int32 {
return int32(LoadUint32((*uint32)(unsafe.Pointer(addr))))
}
func LoadUint32(addr *uint32) (val uint32) {
runtime.RaceSemacquire(&mtx)
runtime.RaceAcquire(unsafe.Pointer(addr))
val = *addr
runtime.RaceSemrelease(&mtx)
return
}
func LoadInt64(addr *int64) int64 {
return int64(LoadUint64((*uint64)(unsafe.Pointer(addr))))
}
func LoadUint64(addr *uint64) (val uint64) {
runtime.RaceSemacquire(&mtx)
runtime.RaceAcquire(unsafe.Pointer(addr))
val = *addr
runtime.RaceSemrelease(&mtx)
return
}
func LoadPointer(addr *unsafe.Pointer) (val unsafe.Pointer) {
runtime.RaceSemacquire(&mtx)
runtime.RaceAcquire(unsafe.Pointer(addr))
val = *addr
runtime.RaceSemrelease(&mtx)
return
}
func LoadUintptr(addr *uintptr) (val uintptr) {
runtime.RaceSemacquire(&mtx)
runtime.RaceAcquire(unsafe.Pointer(addr))
val = *addr
runtime.RaceSemrelease(&mtx)
return
}
func StoreInt32(addr *int32, val int32) {
StoreUint32((*uint32)(unsafe.Pointer(addr)), uint32(val))
}
func StoreUint32(addr *uint32, val uint32) {
runtime.RaceSemacquire(&mtx)
*addr = val
runtime.RaceRelease(unsafe.Pointer(addr))
runtime.RaceSemrelease(&mtx)
}
func StoreInt64(addr *int64, val int64) {
StoreUint64((*uint64)(unsafe.Pointer(addr)), uint64(val))
}
func StoreUint64(addr *uint64, val uint64) {
runtime.RaceSemacquire(&mtx)
*addr = val
runtime.RaceRelease(unsafe.Pointer(addr))
runtime.RaceSemrelease(&mtx)
}
func StorePointer(addr *unsafe.Pointer, val unsafe.Pointer) {
runtime.RaceSemacquire(&mtx)
*addr = val
runtime.RaceRelease(unsafe.Pointer(addr))
runtime.RaceSemrelease(&mtx)
}
func StoreUintptr(addr *uintptr, val uintptr) {
runtime.RaceSemacquire(&mtx)
*addr = val
runtime.RaceRelease(unsafe.Pointer(addr))
runtime.RaceSemrelease(&mtx)
}
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