1// Copyright 2019 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.
4
5//go:build unix || wasip1
6
7package poll
8
9import "syscall"
10
11// Do the interface allocations only once for common
12// Errno values.
13var (
14	errEAGAIN error = syscall.EAGAIN
15	errEINVAL error = syscall.EINVAL
16	errENOENT error = syscall.ENOENT
17)
18
19// errnoErr returns common boxed Errno values, to prevent
20// allocations at runtime.
21func errnoErr(e syscall.Errno) error {
22	switch e {
23	case 0:
24		return nil
25	case syscall.EAGAIN:
26		return errEAGAIN
27	case syscall.EINVAL:
28		return errEINVAL
29	case syscall.ENOENT:
30		return errENOENT
31	}
32	return e
33}
34