github.com/sean-/go@v0.0.0-20151219100004-97f854cd7bb6/src/runtime/internal/atomic/atomic_amd64x.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 amd64 amd64p32
     6  
     7  package atomic
     8  
     9  import "unsafe"
    10  
    11  // The calls to nop are to keep these functions from being inlined.
    12  // If they are inlined we have no guarantee that later rewrites of the
    13  // code by optimizers will preserve the relative order of memory accesses.
    14  
    15  //go:nosplit
    16  func Load(ptr *uint32) uint32 {
    17  	nop()
    18  	return *ptr
    19  }
    20  
    21  //go:nosplit
    22  func Loadp(ptr unsafe.Pointer) unsafe.Pointer {
    23  	nop()
    24  	return *(*unsafe.Pointer)(ptr)
    25  }
    26  
    27  //go:nosplit
    28  func Load64(ptr *uint64) uint64 {
    29  	nop()
    30  	return *ptr
    31  }
    32  
    33  //go:noescape
    34  func Xadd(ptr *uint32, delta int32) uint32
    35  
    36  //go:noescape
    37  func Xadd64(ptr *uint64, delta int64) uint64
    38  
    39  //go:noescape
    40  func Xadduintptr(ptr *uintptr, delta uintptr) uintptr
    41  
    42  //go:noescape
    43  func Xchg(ptr *uint32, new uint32) uint32
    44  
    45  //go:noescape
    46  func Xchg64(ptr *uint64, new uint64) uint64
    47  
    48  //go:noescape
    49  func Xchguintptr(ptr *uintptr, new uintptr) uintptr
    50  
    51  //go:noescape
    52  func And8(ptr *uint8, val uint8)
    53  
    54  //go:noescape
    55  func Or8(ptr *uint8, val uint8)
    56  
    57  // NOTE: Do not add atomicxor8 (XOR is not idempotent).
    58  
    59  //go:noescape
    60  func Cas64(ptr *uint64, old, new uint64) bool
    61  
    62  //go:noescape
    63  func Store(ptr *uint32, val uint32)
    64  
    65  //go:noescape
    66  func Store64(ptr *uint64, val uint64)
    67  
    68  // NO go:noescape annotation; see atomic_pointer.go.
    69  func Storep1(ptr unsafe.Pointer, val unsafe.Pointer)