1// Copyright 2009 The Go Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style 3// license that can be found in the LICENSE file. 4 5package atomic 6 7import "unsafe" 8 9// Export some functions via linkname to assembly in sync/atomic. 10// 11//go:linkname Load 12//go:linkname Loadp 13//go:linkname Load64 14 15//go:nosplit 16//go:noinline 17func Load(ptr *uint32) uint32 { 18 return *ptr 19} 20 21//go:nosplit 22//go:noinline 23func Loadp(ptr unsafe.Pointer) unsafe.Pointer { 24 return *(*unsafe.Pointer)(ptr) 25} 26 27//go:nosplit 28//go:noinline 29func Load64(ptr *uint64) uint64 { 30 return *ptr 31} 32 33//go:nosplit 34//go:noinline 35func LoadAcq(ptr *uint32) uint32 { 36 return *ptr 37} 38 39//go:nosplit 40//go:noinline 41func LoadAcq64(ptr *uint64) uint64 { 42 return *ptr 43} 44 45//go:nosplit 46//go:noinline 47func LoadAcquintptr(ptr *uintptr) uintptr { 48 return *ptr 49} 50 51//go:noescape 52func Xadd(ptr *uint32, delta int32) uint32 53 54//go:noescape 55func Xadd64(ptr *uint64, delta int64) uint64 56 57//go:noescape 58func Xadduintptr(ptr *uintptr, delta uintptr) uintptr 59 60//go:noescape 61func Xchg(ptr *uint32, new uint32) uint32 62 63//go:noescape 64func Xchg64(ptr *uint64, new uint64) uint64 65 66//go:noescape 67func Xchguintptr(ptr *uintptr, new uintptr) uintptr 68 69//go:nosplit 70//go:noinline 71func Load8(ptr *uint8) uint8 { 72 return *ptr 73} 74 75//go:noescape 76func And8(ptr *uint8, val uint8) 77 78//go:noescape 79func Or8(ptr *uint8, val uint8) 80 81//go:noescape 82func And(ptr *uint32, val uint32) 83 84//go:noescape 85func Or(ptr *uint32, val uint32) 86 87//go:noescape 88func And32(ptr *uint32, val uint32) uint32 89 90//go:noescape 91func Or32(ptr *uint32, val uint32) uint32 92 93//go:noescape 94func And64(ptr *uint64, val uint64) uint64 95 96//go:noescape 97func Or64(ptr *uint64, val uint64) uint64 98 99//go:noescape 100func Anduintptr(ptr *uintptr, val uintptr) uintptr 101 102//go:noescape 103func Oruintptr(ptr *uintptr, val uintptr) uintptr 104 105// NOTE: Do not add atomicxor8 (XOR is not idempotent). 106 107//go:noescape 108func Cas64(ptr *uint64, old, new uint64) bool 109 110//go:noescape 111func CasRel(ptr *uint32, old, new uint32) bool 112 113//go:noescape 114func Store(ptr *uint32, val uint32) 115 116//go:noescape 117func Store8(ptr *uint8, val uint8) 118 119//go:noescape 120func Store64(ptr *uint64, val uint64) 121 122//go:noescape 123func StoreRel(ptr *uint32, val uint32) 124 125//go:noescape 126func StoreRel64(ptr *uint64, val uint64) 127 128//go:noescape 129func StoreReluintptr(ptr *uintptr, val uintptr) 130 131// StorepNoWB performs *ptr = val atomically and without a write 132// barrier. 133// 134// NO go:noescape annotation; see atomic_pointer.go. 135func StorepNoWB(ptr unsafe.Pointer, val unsafe.Pointer) 136