errno_unix.mx raw

   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  
   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