Source file src/internal/poll/errno_unix.go

     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	// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris
     6	
     7	package poll
     8	
     9	import "syscall"
    10	
    11	// Do the interface allocations only once for common
    12	// Errno values.
    13	var (
    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.
    21	func 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	

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