// Version returns the OS version name/number.
func Version() (string, error) {
	// Version detection on Wasm varies depending on the underlying runtime
	// (browser, node, etc), nor is there a standard via something like
	// WASI (see https://go.dev/issue/31105). For now, attempt a few simple
	// combinations for the convenience of reading logs at build.golang.org
	// and local development. It's not a goal to recognize all environments.

func init() {
	Reader = &reader{}
}

type reader struct{}

func (r *reader) Read(b []byte) (int, error) {
	// This uses the wasi_snapshot_preview1 random_get syscall defined in
	// https://github.com/WebAssembly/WASI/blob/23a52736049f4327dd335434851d5dc40ab7cad1/legacy/preview1/docs.md#-random_getbuf-pointeru8-buf_len-size---result-errno.
	// The definition does not explicitly guarantee that the entire buffer will

// 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