github.com/zach-klippenstein/go@v0.0.0-20150108044943-fcfbeb3adf58/src/runtime/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 runtime
     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 atomicload(ptr *uint32) uint32 {
    17  	nop()
    18  	return *ptr
    19  }
    20  
    21  //go:nosplit
    22  func atomicloadp(ptr unsafe.Pointer) unsafe.Pointer {
    23  	nop()
    24  	return *(*unsafe.Pointer)(ptr)
    25  }
    26  
    27  //go:nosplit
    28  func atomicload64(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 xchg(ptr *uint32, new uint32) uint32
    41  
    42  //go:noescape
    43  func xchg64(ptr *uint64, new uint64) uint64
    44  
    45  // NO go:noescape annotation; see atomic_pointer.go.
    46  func xchgp1(ptr unsafe.Pointer, new unsafe.Pointer) unsafe.Pointer
    47  
    48  //go:noescape
    49  func xchguintptr(ptr *uintptr, new uintptr) uintptr
    50  
    51  //go:noescape
    52  func atomicor8(ptr *uint8, val uint8)
    53  
    54  //go:noescape
    55  func cas64(ptr *uint64, old, new uint64) bool
    56  
    57  //go:noescape
    58  func atomicstore(ptr *uint32, val uint32)
    59  
    60  //go:noescape
    61  func atomicstore64(ptr *uint64, val uint64)
    62  
    63  // NO go:noescape annotation; see atomic_pointer.go.
    64  func atomicstorep1(ptr unsafe.Pointer, val unsafe.Pointer)