blob: cbf254fcb5d40bdd0f34a3380f6d8a10f879b450 [file] [log] [blame]
// Copyright 2018 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.
// TODO(neelance): implement with actual atomic operations as soon as threads are available
// See https://github.com/WebAssembly/design/issues/1073
package atomic
import "unsafe"
//go:nosplit
//go:noinline
func Load(ptr *uint32) uint32 {
return *ptr
}
//go:nosplit
//go:noinline
func Loadp(ptr unsafe.Pointer) unsafe.Pointer {
return *(*unsafe.Pointer)(ptr)
}
//go:nosplit
//go:noinline
func Load64(ptr *uint64) uint64 {
return *ptr
}
//go:nosplit
//go:noinline
func Xadd(ptr *uint32, delta int32) uint32 {
new := *ptr + uint32(delta)
*ptr = new
return new
}
//go:nosplit
//go:noinline
func Xadd64(ptr *uint64, delta int64) uint64 {
new := *ptr + uint64(delta)
*ptr = new
return new
}
//go:nosplit
//go:noinline
func Xadduintptr(ptr *uintptr, delta uintptr) uintptr {
new := *ptr + delta
*ptr = new
return new
}
//go:nosplit
//go:noinline
func Xchg(ptr *uint32, new uint32) uint32 {
old := *ptr
*ptr = new
return old
}
//go:nosplit
//go:noinline
func Xchg64(ptr *uint64, new uint64) uint64 {
old := *ptr
*ptr = new
return old
}
//go:nosplit
//go:noinline
func Xchguintptr(ptr *uintptr, new uintptr) uintptr {
old := *ptr
*ptr = new
return old
}
//go:nosplit
//go:noinline
func And8(ptr *uint8, val uint8) {
*ptr = *ptr & val
}
//go:nosplit
//go:noinline
func Or8(ptr *uint8, val uint8) {
*ptr = *ptr | val
}
// NOTE: Do not add atomicxor8 (XOR is not idempotent).
//go:nosplit
//go:noinline
func Cas64(ptr *uint64, old, new uint64) bool {
if *ptr == old {
*ptr = new
return true
}
return false
}
//go:nosplit
//go:noinline
func Store(ptr *uint32, val uint32) {
*ptr = val
}
//go:nosplit
//go:noinline
func Store64(ptr *uint64, val uint64) {
*ptr = val
}
//go:noinline
//go:nosplit
func StorepNoWB(ptr unsafe.Pointer, val unsafe.Pointer) {
*(*uintptr)(ptr) = uintptr(val)
}
//go:nosplit
//go:noinline
func Cas(ptr *uint32, old, new uint32) bool {
if *ptr == old {
*ptr = new
return true
}
return false
}
//go:nosplit
//go:noinline
func Casp1(ptr *unsafe.Pointer, old, new unsafe.Pointer) bool {
if *ptr == old {
*ptr = new
return true
}
return false
}
//go:nosplit
//go:noinline
func Casuintptr(ptr *uintptr, old, new uintptr) bool {
if *ptr == old {
*ptr = new
return true
}
return false
}
//go:nosplit
//go:noinline
func Storeuintptr(ptr *uintptr, new uintptr) {
*ptr = new
}
//go:nosplit
//go:noinline
func Loaduintptr(ptr *uintptr) uintptr {
return *ptr
}
//go:nosplit
//go:noinline
func Loaduint(ptr *uint) uint {
return *ptr
}
//go:nosplit
//go:noinline
func Loadint64(ptr *int64) int64 {
return *ptr
}
//go:nosplit
//go:noinline
func Xaddint64(ptr *int64, delta int64) int64 {
new := *ptr + delta
*ptr = new
return new
}