golang readdirent_getdirentries 代码
文件路径：/src/cmd/vendor/golang.org/x/sys/unix/readdirent_getdirentries.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 darwin
/ +build darwin
package unix
import "unsafe"
/ ReadDirent reads directory entries from fd and writes them into buf.
func ReadDirent(fd int, buf []byte) (n int, err error) {
/ Final argument is (basep *uintptr) and the syscall doesn't take nil.
/ 64 bits should be enough. (32 bits isn't even on 386). Since the
/ actual system call is getdirentries64, 64 is a good guess.
/ TODO(rsc): Can we use a single global basep for all calls?
var base = (*uintptr)(unsafe.Pointer(new(uint64)))
return Getdirentries(fd, buf, base)
}