// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package net

import (
	"context"
	"internal/bytealg"
	"runtime"
	"sync"
	_ "unsafe" // for linkname
)

// BUG(rsc,mikio): On DragonFly BSD and OpenBSD, listening on the
// "tcp" and "udp" networks does not listen for both IPv4 and IPv6
// connections. This is due to the fact that IPv4 traffic will not be

//go:build arm

package atomic

import (
	"internal/cpu"
	"unsafe"
)

const (
	offsetARMHasV7Atomics = unsafe.Offsetof(cpu.ARM.HasV7Atomics)
)

// Export some functions via linkname to assembly in sync/atomic.
//
//go:linkname Xchg
//go:linkname Xchguintptr
//go:linkname Xadd

type spinlock struct {
	v uint32
}

//go:nosplit
func (l *spinlock) lock() {
	for {

// license that can be found in the LICENSE file.

// TODO(neelance): implement with actual atomic operations as soon as threads are available
// See https://github.com/WebAssembly/design/issues/1073

// Export some functions via linkname to assembly in sync/atomic.
//
//go:linkname Load
//go:linkname Loadp
//go:linkname Load64
//go:linkname Loadint32
//go:linkname Loadint64
//go:linkname Loaduintptr
//go:linkname LoadAcquintptr

// SRV-like "underscore labels"; see golang.org/issue/12421).
//
// isDomainName should be an internal detail,
// but widely used packages access it using linkname.
// Notable members of the hall of shame include:
//   - github.com/sagernet/sing
//
// Do not remove or change the type signature.
// See go.dev/issue/67401.
//
//go:linkname isDomainName

// license that can be found in the LICENSE file.

// Package cpu implements processor feature detection
// used by the Go standard library.
package cpu

import _ "unsafe" // for linkname

// DebugOptions is set to true by the runtime if the OS supports reading
// GODEBUG early in runtime startup.
// This should not be changed after it is initialized.
var DebugOptions bool

// Solaris, the MulticastAddrs method of Interface is not implemented.

// errNoSuchInterface should be an internal detail,
// but widely used packages access it using linkname.
// Notable members of the hall of shame include:
//   - github.com/sagernet/sing
//
// Do not remove or change the type signature.
// See go.dev/issue/67401.
//
//go:linkname errNoSuchInterface

var (

//
// Values containing the types defined in this package should not be copied.
package sync

import (
	"internal/race"
	"sync/atomic"
	"unsafe"
)

// Provided by runtime via linkname.
func throw(string)
func fatal(string)

// A Mutex is a mutual exclusion lock.
// The zero value for a Mutex is an unlocked mutex.
//
// A Mutex must not be copied after first use.
//