Source File
	errno_unix.go

Belonging Package
	internal/poll

// Copyright 2019 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.

//go:build unix || wasip1

package poll

import "syscall"

// Do the interface allocations only once for common
// Errno values.
var (
	errEAGAIN error = syscall.EAGAIN
	errEINVAL error = syscall.EINVAL
	errENOENT error = syscall.ENOENT
)

// errnoErr returns common boxed Errno values, to prevent
// allocations at runtime.
func errnoErr(e syscall.Errno) error {
	switch e {
	case 0:
		return nil
	case syscall.EAGAIN:
		return errEAGAIN
	case syscall.EINVAL:
		return errEINVAL
	case syscall.ENOENT:
		return errENOENT
	}
	return e
}

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