go errno_unix 源码
golang errno_unix 代码
文件路径：/src/internal/poll/errno_unix.go
// 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
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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