// 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.

//go:build unix || (js && wasm) || wasip1 || windows

package os

import (
	"runtime"
	"syscall"
	"time"
)

// Close closes the [File], rendering it unusable for I/O.
// On files that support [File.SetDeadline], any pending I/O operations will

// 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.

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

package net

import (
	"context"
	"net/netip"
	"syscall"
)

func sockaddrToUDP(sa syscall.Sockaddr) Addr {
	switch sa := sa.(type) {
	case *syscall.SockaddrInet4:
		return &UDPAddr{IP: sa.Addr[0:], Port: sa.Port}

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

// Only run where builders (build.golang.org) have
// access to compiled packages for import.
//
//go:build !android && !ios && !js && !wasip1

package types_test

// This file shows examples of basic usage of the go/types API.
//
// To locate a Go package, use (*go/build.Context).Import.
// To load, parse, and type-check a complete Go program

func Storep() {
	var x int // ERROR "moved to heap: x"
	atomic.StorepNoWB(unsafe.Pointer(&ptr), unsafe.Pointer(&x))
}

func Casp1() {
	// BAD: should always be "does not escape"
	x := new(int) // ERROR "escapes to heap|does not escape"
	var y int     // ERROR "moved to heap: y"
	atomic.Casp1(&ptr, unsafe.Pointer(x), unsafe.Pointer(&y))

//go:build !wasm

package atomic

import "unsafe"

//go:noescape
func Cas(ptr *uint32, old, new uint32) bool

// NO go:noescape annotation; see atomic_pointer.go.
func Casp1(ptr *unsafe.Pointer, old, new unsafe.Pointer) bool

//go:noescape
func Casint32(ptr *int32, old, new int32) bool

//go:noescape
func Casint64(ptr *int64, old, new int64) bool

//go:noescape

	MOVQ	ptr+0(FP), BX
	MOVQ	old+8(FP), AX
	MOVQ	new+16(FP), CX
	LOCK
	CMPXCHGQ	CX, 0(BX)
	SETEQ	ret+24(FP)
	RET

// bool Casp1(void **val, void *old, void *new)
// Atomically:
//	if(*val == old){
//		*val = new;
//		return 1;
//	} else
//		return 0;
TEXT ·Casp1(SB), NOSPLIT, $0-25
	MOVQ	ptr+0(FP), BX
	MOVQ	old+8(FP), AX
	MOVQ	new+16(FP), CX
	LOCK
	CMPXCHGQ	CX, 0(BX)
	SETEQ	ret+24(FP)
	RET

		;;
	"wasmtime" | "")
		exec wasmtime run --dir=/ --env PWD="$PWD" --env PATH="$PATH" -W max-wasm-stack=1048576 ${GOWASIRUNTIMEARGS:-} "$1" "${@:2}"
		;;
	*)
		echo "Unknown Go WASI runtime specified: $GOWASIRUNTIME"
		exit 1
		;;

	MOVL	old_hi+8(FP), DX
	MOVL	new_lo+12(FP), BX
	MOVL	new_hi+16(FP), CX
	LOCK
	CMPXCHG8B	0(BP)
	SETEQ	ret+20(FP)
	RET

// bool Casp1(void **p, void *old, void *new)
// Atomically:
//	if(*p == old){
//		*p = new;
//		return 1;
//	}else
//		return 0;
TEXT ·Casp1(SB), NOSPLIT, $0-13
	MOVL	ptr+0(FP), BX
	MOVL	old+4(FP), AX
	MOVL	new+8(FP), CX
	LOCK
	CMPXCHGL	CX, 0(BX)
	SETEQ	ret+12(FP)
	RET

// func Xaddint64(ptr *int64, delta int64) int64
TEXT ·Xaddint64(SB), NOSPLIT, $0-24
	BR	·Xadd64(SB)

// func Casp1(ptr *unsafe.Pointer, old, new unsafe.Pointer) bool
// Atomically:
//	if *ptr == old {
//		*ptr = new
//		return 1
//	} else {
//		return 0
//	}
TEXT ·Casp1(SB), NOSPLIT, $0-25
	BR ·Cas64(SB)

// func Xadd(ptr *uint32, delta int32) uint32
// Atomically:
//	*ptr += delta

func atomic_casPointer(ptr *unsafe.Pointer, old, new unsafe.Pointer) bool {
	if writeBarrier.enabled {
		atomicwb(ptr, new)
	}
	if goexperiment.CgoCheck2 {
		cgoCheckPtrWrite(ptr, new)
	}
	return atomic.Casp1(ptr, old, new)
}

// Like above, but implement in terms of sync/atomic's uintptr operations.
// We cannot just call the runtime routines, because the race detector expects