//go:build wasm

package os

import "syscall"

// Pipe returns a connected pair of Files; reads from r return bytes written to w.
// It returns the files and an error, if any.
func Pipe() (r *File, w *File, err error) {
	// Neither GOOS=js nor GOOS=wasip1 have pipes.
	return nil, nil, NewSyscallError("pipe", syscall.ENOSYS)

	}
	// windows pipes are expected to use forward slashes: https://learn.microsoft.com/windows/win32/ipc/pipe-names
	// so using `url` like we do on unix gives us unclear benefits - see https://github.com/kubernetes/kubernetes/issues/78628
	// So we just construct the path from scratch.
	// Format: \\ServerName\pipe\PipeName

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

//go:build dragonfly || freebsd || linux || netbsd || openbsd || solaris

package runtime

func Pipe() (r, w int32, errno int32) {
	return pipe2(0)

}

// StdinPipe returns a pipe that will be connected to the command's
// standard input when the command starts.
// The pipe will be closed automatically after [Cmd.Wait] sees the command exit.
// A caller need only call Close to force the pipe to close sooner.
// For example, if the command being run will not exit until standard input
// is closed, the caller must close the pipe.

    private boolean dcePipe;

    Object lock;

    TransactNamedPipeInputStream( SmbNamedPipe pipe ) throws SmbException,
                MalformedURLException, UnknownHostException {
        super( pipe, ( pipe.pipeType & 0xFFFF00FF ) | SmbFile.O_EXCL );
        this.dcePipe = ( pipe.pipeType & SmbNamedPipe.PIPE_TYPE_DCE_TRANSACT ) != SmbNamedPipe.PIPE_TYPE_DCE_TRANSACT;
        lock = new Object();
    }

			outerDone <- true
		}()

		var wg sync.WaitGroup
		done := make(chan bool)

		wg.Add(1)
		go func() {
			<-done
			wg.Done()
		}()

		rp, wp, err := os.Pipe()
		if err != nil {
			log.Fatalf("failed to create pipe: %v", err)
			return
		}
		defer func() {
			rp.Close()
			wp.Close()
		}()
		wg.Add(1)
		go func() {
			var tmp [1]byte
			rp.Read(tmp[:])
			<-done
			wg.Done()

    @Issue("https://github.com/gradle/gradle/issues/2552")
    def "copying files to a directory with named pipes fails"() {
        def input = file("input.txt").createFile()

        def outputDirectory = file("output").createDir()
        def pipe = outputDirectory.file("testPipe").createNamedPipe()

        buildFile << """
            task copy(type: Copy) {

}

//sysnb pipe() (r int, w int, err error)

func Pipe(p []int) (err error) {
	if len(p) != 2 {
		return EINVAL
	}
	r, w, err := pipe()
	if err == nil {
		p[0], p[1] = r, w
	}
	return err
}

//sysnb	pipe2(p *[2]_C_int, flags int) (r int, w int, err error)

func Pipe2(p []int, flags int) (err error) {
	if len(p) != 2 {
		return EINVAL

	// Create a goroutine blocked before tracing.
	wg.Add(1)
	go func() {
		<-done
		wg.Done()
	}()

	// Create a goroutine blocked in syscall before tracing.
	rp, wp, err := os.Pipe()
	if err != nil {
		log.Fatalf("failed to create pipe: %v", err)
	}
	defer func() {
		rp.Close()
		wp.Close()
	}()
	wg.Add(1)
	go func() {
		var tmp [1]byte
		rp.Read(tmp[:])
		<-done
		wg.Done()
	}()

	}
	expiredTime := time.NewTimer(timeout)
	defer expiredTime.Stop()

	// Trigger garbage collection repeatedly, waiting for all pipes in sync.Pool
	// to either be deallocated and closed, or to time out.
	for {
		runtime.GC()
		time.Sleep(10 * time.Millisecond)

		// Detect whether all pipes are closed properly.
		var leakedFDs []int
		pendingFDs.Range(func(k, v any) bool {
			leakedFDs = append(leakedFDs, k.(int))