src/internal/poll/fd_poll_fuchsia.go

// Copyright 2013 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.

// TODO: use fd_poll_runtime.go for fuchsia

package poll

import (
	"time"
)

type pollDesc struct {
	fd      *FD
	closing bool
}

func (pd *pollDesc) init(fd *FD) error { pd.fd = fd; return nil }

func (pd *pollDesc) close() {}

func (pd *pollDesc) evict() {
	pd.closing = true
	if pd.fd != nil {
		// TODO syscall.StopIO(pd.fd.Sysfd)
	}
}

func (pd *pollDesc) prepare(mode int, isFile bool) error {
	if pd.closing {
		return errClosing(isFile)
	}
	return nil
}

func (pd *pollDesc) prepareRead(isFile bool) error { return pd.prepare('r', isFile) }

func (pd *pollDesc) prepareWrite(isFile bool) error { return pd.prepare('w', isFile) }

func (pd *pollDesc) wait(mode int, isFile bool) error {
	if pd.closing {
		return errClosing(isFile)
	}
	return ErrTimeout
}

func (pd *pollDesc) waitRead(isFile bool) error { return pd.wait('r', isFile) }

func (pd *pollDesc) waitWrite(isFile bool) error { return pd.wait('w', isFile) }

func (pd *pollDesc) waitCanceled(mode int) {}

func (pd *pollDesc) pollable() bool { return true }

// SetDeadline sets the read and write deadlines associated with fd.
func (fd *FD) SetDeadline(t time.Time) error {
	return setDeadlineImpl(fd, t, 'r'+'w')
}

// SetReadDeadline sets the read deadline associated with fd.
func (fd *FD) SetReadDeadline(t time.Time) error {
	return setDeadlineImpl(fd, t, 'r')
}

// SetWriteDeadline sets the write deadline associated with fd.
func (fd *FD) SetWriteDeadline(t time.Time) error {
	return setDeadlineImpl(fd, t, 'w')
}

func setDeadlineImpl(fd *FD, t time.Time, mode int) error {
	return ErrNoDeadline // TODO set deadline
}

// PollDescriptor returns the descriptor being used by the poller,
// or ^uintptr(0) if there isn't one. This is only used for testing.
func PollDescriptor() uintptr {
	return ^uintptr(0)
}