github.com/geraldss/go/src@v0.0.0-20210511222824-ac7d0ebfc235/runtime/internal/atomic/atomic_386.go (about)

     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  
     5  // +build 386
     6  
     7  package atomic
     8  
     9  import "unsafe"
    10  
    11  // Export some functions via linkname to assembly in sync/atomic.
    12  //go:linkname Load
    13  //go:linkname Loadp
    14  
    15  //go:nosplit
    16  //go:noinline
    17  func Load(ptr *uint32) uint32 {
    18  	return *ptr
    19  }
    20  
    21  //go:nosplit
    22  //go:noinline
    23  func Loadp(ptr unsafe.Pointer) unsafe.Pointer {
    24  	return *(*unsafe.Pointer)(ptr)
    25  }
    26  
    27  //go:nosplit
    28  //go:noinline
    29  func LoadAcq(ptr *uint32) uint32 {
    30  	return *ptr
    31  }
    32  
    33  //go:nosplit
    34  //go:noinline
    35  func LoadAcquintptr(ptr *uintptr) uintptr {
    36  	return *ptr
    37  }
    38  
    39  //go:noescape
    40  func Xadd64(ptr *uint64, delta int64) uint64
    41  
    42  //go:noescape
    43  func Xadduintptr(ptr *uintptr, delta uintptr) uintptr
    44  
    45  //go:noescape
    46  func Xadd(ptr *uint32, delta int32) uint32
    47  
    48  //go:noescape
    49  func Xchg64(ptr *uint64, new uint64) uint64
    50  
    51  //go:noescape
    52  func Xchg(ptr *uint32, new uint32) uint32
    53  
    54  //go:noescape
    55  func Xchguintptr(ptr *uintptr, new uintptr) uintptr
    56  
    57  //go:noescape
    58  func Load64(ptr *uint64) uint64
    59  
    60  //go:nosplit
    61  //go:noinline
    62  func Load8(ptr *uint8) uint8 {
    63  	return *ptr
    64  }
    65  
    66  //go:noescape
    67  func And8(ptr *uint8, val uint8)
    68  
    69  //go:noescape
    70  func Or8(ptr *uint8, val uint8)
    71  
    72  //go:noescape
    73  func And(ptr *uint32, val uint32)
    74  
    75  //go:noescape
    76  func Or(ptr *uint32, val uint32)
    77  
    78  // NOTE: Do not add atomicxor8 (XOR is not idempotent).
    79  
    80  //go:noescape
    81  func Cas64(ptr *uint64, old, new uint64) bool
    82  
    83  //go:noescape
    84  func CasRel(ptr *uint32, old, new uint32) bool
    85  
    86  //go:noescape
    87  func Store(ptr *uint32, val uint32)
    88  
    89  //go:noescape
    90  func Store8(ptr *uint8, val uint8)
    91  
    92  //go:noescape
    93  func Store64(ptr *uint64, val uint64)
    94  
    95  //go:noescape
    96  func StoreRel(ptr *uint32, val uint32)
    97  
    98  //go:noescape
    99  func StoreReluintptr(ptr *uintptr, val uintptr)
   100  
   101  // NO go:noescape annotation; see atomic_pointer.go.
   102  func StorepNoWB(ptr unsafe.Pointer, val unsafe.Pointer)