文件操作 - atomic_andor_generic.go
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文件: /usr/share/go-1.23/src/internal/runtime/atomic/atomic_andor_generic.go
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// Copyright 2023 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. //go:build arm || wasm // Export some functions via linkname to assembly in sync/atomic. // //go:linkname And32 //go:linkname Or32 //go:linkname And64 //go:linkname Or64 //go:linkname Anduintptr //go:linkname Oruintptr package atomic import _ "unsafe" // For linkname //go:nosplit func And32(ptr *uint32, val uint32) uint32 { for { old := *ptr if Cas(ptr, old, old&val) { return old } } } //go:nosplit func Or32(ptr *uint32, val uint32) uint32 { for { old := *ptr if Cas(ptr, old, old|val) { return old } } } //go:nosplit func And64(ptr *uint64, val uint64) uint64 { for { old := *ptr if Cas64(ptr, old, old&val) { return old } } } //go:nosplit func Or64(ptr *uint64, val uint64) uint64 { for { old := *ptr if Cas64(ptr, old, old|val) { return old } } } //go:nosplit func Anduintptr(ptr *uintptr, val uintptr) uintptr { for { old := *ptr if Casuintptr(ptr, old, old&val) { return old } } } //go:nosplit func Oruintptr(ptr *uintptr, val uintptr) uintptr { for { old := *ptr if Casuintptr(ptr, old, old|val) { return old } } }
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