github.com/twelsh-aw/go/src@v0.0.0-20230516233729-a56fe86a7c81/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  //go:build 386
     6  
     7  package atomic
     8  
     9  import "unsafe"
    10  
    11  // Export some functions via linkname to assembly in sync/atomic.
    12  //
    13  //go:linkname Load
    14  //go:linkname Loadp
    15  
    16  //go:nosplit
    17  //go:noinline
    18  func Load(ptr *uint32) uint32 {
    19  	return *ptr
    20  }
    21  
    22  //go:nosplit
    23  //go:noinline
    24  func Loadp(ptr unsafe.Pointer) unsafe.Pointer {
    25  	return *(*unsafe.Pointer)(ptr)
    26  }
    27  
    28  //go:nosplit
    29  //go:noinline
    30  func LoadAcq(ptr *uint32) uint32 {
    31  	return *ptr
    32  }
    33  
    34  //go:nosplit
    35  //go:noinline
    36  func LoadAcquintptr(ptr *uintptr) uintptr {
    37  	return *ptr
    38  }
    39  
    40  //go:noescape
    41  func Xadd64(ptr *uint64, delta int64) uint64
    42  
    43  //go:noescape
    44  func Xadduintptr(ptr *uintptr, delta uintptr) uintptr
    45  
    46  //go:noescape
    47  func Xadd(ptr *uint32, delta int32) uint32
    48  
    49  //go:noescape
    50  func Xchg64(ptr *uint64, new uint64) uint64
    51  
    52  //go:noescape
    53  func Xchg(ptr *uint32, new uint32) uint32
    54  
    55  //go:noescape
    56  func Xchguintptr(ptr *uintptr, new uintptr) uintptr
    57  
    58  //go:noescape
    59  func Load64(ptr *uint64) uint64
    60  
    61  //go:nosplit
    62  //go:noinline
    63  func Load8(ptr *uint8) uint8 {
    64  	return *ptr
    65  }
    66  
    67  //go:noescape
    68  func And8(ptr *uint8, val uint8)
    69  
    70  //go:noescape
    71  func Or8(ptr *uint8, val uint8)
    72  
    73  //go:noescape
    74  func And(ptr *uint32, val uint32)
    75  
    76  //go:noescape
    77  func Or(ptr *uint32, val uint32)
    78  
    79  // NOTE: Do not add atomicxor8 (XOR is not idempotent).
    80  
    81  //go:noescape
    82  func Cas64(ptr *uint64, old, new uint64) bool
    83  
    84  //go:noescape
    85  func CasRel(ptr *uint32, old, new uint32) bool
    86  
    87  //go:noescape
    88  func Store(ptr *uint32, val uint32)
    89  
    90  //go:noescape
    91  func Store8(ptr *uint8, val uint8)
    92  
    93  //go:noescape
    94  func Store64(ptr *uint64, val uint64)
    95  
    96  //go:noescape
    97  func StoreRel(ptr *uint32, val uint32)
    98  
    99  //go:noescape
   100  func StoreReluintptr(ptr *uintptr, val uintptr)
   101  
   102  // NO go:noescape annotation; see atomic_pointer.go.
   103  func StorepNoWB(ptr unsafe.Pointer, val unsafe.Pointer)