// cannot access any information about the socket due to limitations
	// with WASI preview 1 networking, and the WASM runtimes do not log the
	// port when you pre-open a socket. So, we probe for a free port here.
	// Given there's an unavoidable race condition, the test is disabled by
	// default.
	if os.Getenv("GOWASIENABLERACYTEST") != "1" {
		t.Skip("skipping WASI test with unavoidable race condition")
	}
	var host string

		;;
	"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
		;;

// not have a mechanism to to spawn processes so there is no reason for an
// application to take a dependency on this type.
type Rusage struct {
	Utime Timeval
	Stime Timeval
}

// ProcAttr is a placeholder to allow compilation of the [os/exec] package
// because we need Go programs to be portable across platforms. WASI does

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

//go:build wasip1

package runtime

import "unsafe"

// WASI network poller.
//
// WASI preview 1 includes a poll_oneoff host function that behaves similarly
// to poll(2) on Linux. Like poll(2), poll_oneoff is level triggered. It
// accepts one or more subscriptions to FD read or write events.
//

package poll

import (
	"internal/byteorder"
	"sync/atomic"
	"syscall"
	"unsafe"
)

type SysFile struct {
	// RefCountPtr is a pointer to the reference count of Sysfd.
	//
	// WASI preview 1 lacks a dup(2) system call. When the os and net packages
	// need to share a file/socket, instead of duplicating the underlying file
	// descriptor, we instead provide a way to copy FD instances and manage the