"sync/atomic"
	"time"
	_ "unsafe"
)

// defaultNS is the default name servers to use in the absence of DNS configuration.
//
// defaultNS should be an internal detail,
// but widely used packages access it using linkname.
// Notable members of the hall of shame include:
//   - github.com/pojntfx/hydrapp/hydrapp
//   - github.com/mtibben/androiddnsfix
//   - github.com/metacubex/mihomo
//
// Do not remove or change the type signature.

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

//go:build unix || js || wasip1 || windows

package net

import (
	"context"
	"internal/poll"
	"net/netip"
	"runtime"
	"syscall"
	_ "unsafe" // for linkname
)

// probe probes IPv4, IPv6 and IPv4-mapped IPv6 communication
// capabilities which are controlled by the IPV6_V6ONLY socket option
// and kernel configuration.
//

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

//go:build 386

package atomic

import "unsafe"

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

//go:nosplit
//go:noinline
func Load(ptr *uint32) uint32 {
	return *ptr
}

//go:nosplit

	return runtime_cmpstring(a, b)
}

// runtime.cmpstring calls are emitted by the compiler.
//
// runtime.cmpstring should be an internal detail,
// but widely used packages access it using linkname.
// Notable members of the hall of shame include:
//   - gitee.com/zhaochuninhefei/gmgo
//   - github.com/bytedance/gopkg
//   - github.com/songzhibin97/gkit
//
// Do not remove or change the type signature.

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

// Test escape analysis and liveness inferred for uintptrkeepalive functions.
//
// This behavior is enabled automatically for function declarations with no
// bodies (assembly, linkname), as well as explicitly on complete functions
// with //go:uintptrkeepalive.
//
// This is most important for syscall.Syscall (and similar functions), so we
// test it explicitly.

package p

import (

// Copyright 2009 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.

package atomic

import "unsafe"

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

//go:nosplit
//go:noinline
func Load(ptr *uint32) uint32 {
	return *ptr
}

//go:nosplit

// uses normal / high-level Go code as opposed to one of the more
// restricted dialects used for the trickier parts of the runtime.
package exithook

import (
	"internal/runtime/atomic"
	_ "unsafe" // for linkname
)

// A Hook is a function to be run at program termination
// (when someone invokes os.Exit, or when main.main returns).
// Hooks are run in reverse order of registration:
// the first hook added is the last one run.

// Copyright 2016 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.

package atomic

import "unsafe"

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

//go:nosplit
//go:noinline
func Load(ptr *uint32) uint32 {
	return *ptr
}

//go:nosplit

	if strings.Contains(n.Sym().Name, "cgo") {
		return false
	}

	// Do not instrument globals that are linknamed, because their home package will do the work.
	if n.Sym().Linkname != "" {
		return false
	}

	return true

// atomicwb performs a write barrier before an atomic pointer write.
// The caller should guard the call with "if writeBarrier.enabled".
//
// atomicwb should be an internal detail,
// but widely used packages access it using linkname.
// Notable members of the hall of shame include:
//   - github.com/bytedance/gopkg
//   - github.com/songzhibin97/gkit
//
// Do not remove or change the type signature.
// See go.dev/issue/67401.
//