1 // Copyright 2013 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
5 //go:build (js && wasm) || wasip1
14 type pollDesc struct {
19 func (pd *pollDesc) init(fd *FD) error { pd.fd = fd; return nil }
21 func (pd *pollDesc) close() {}
23 func (pd *pollDesc) evict() {
26 syscall.StopIO(pd.fd.Sysfd)
30 func (pd *pollDesc) prepare(mode int, isFile bool) error {
32 return errClosing(isFile)
37 func (pd *pollDesc) prepareRead(isFile bool) error { return pd.prepare('r', isFile) }
39 func (pd *pollDesc) prepareWrite(isFile bool) error { return pd.prepare('w', isFile) }
41 func (pd *pollDesc) wait(mode int, isFile bool) error {
43 return errClosing(isFile)
45 if isFile { // TODO(neelance): js/wasm: Use callbacks from JS to block until the read/write finished.
48 return ErrDeadlineExceeded
51 func (pd *pollDesc) waitRead(isFile bool) error { return pd.wait('r', isFile) }
53 func (pd *pollDesc) waitWrite(isFile bool) error { return pd.wait('w', isFile) }
55 func (pd *pollDesc) waitCanceled(mode int) {}
57 func (pd *pollDesc) pollable() bool { return true }
59 // SetDeadline sets the read and write deadlines associated with fd.
60 func (fd *FD) SetDeadline(t time.Time) error {
61 return setDeadlineImpl(fd, t, 'r'+'w')
64 // SetReadDeadline sets the read deadline associated with fd.
65 func (fd *FD) SetReadDeadline(t time.Time) error {
66 return setDeadlineImpl(fd, t, 'r')
69 // SetWriteDeadline sets the write deadline associated with fd.
70 func (fd *FD) SetWriteDeadline(t time.Time) error {
71 return setDeadlineImpl(fd, t, 'w')
74 func setDeadlineImpl(fd *FD, t time.Time, mode int) error {
79 if err := fd.incref(); err != nil {
84 syscall.SetReadDeadline(fd.Sysfd, d)
86 syscall.SetWriteDeadline(fd.Sysfd, d)
88 syscall.SetReadDeadline(fd.Sysfd, d)
89 syscall.SetWriteDeadline(fd.Sysfd, d)
95 // IsPollDescriptor reports whether fd is the descriptor being used by the poller.
96 // This is only used for testing.
97 func IsPollDescriptor(fd uintptr) bool {