go fd_writev_unix 源码
golang fd_writev_unix 代码
文件路径：/src/internal/poll/fd_writev_unix.go
// Copyright 2018 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 dragonfly || freebsd || linux || netbsd || openbsd
package poll
import (
"syscall"
"unsafe"
)
func writev(fd int, iovecs []syscall.Iovec) (uintptr, error) {
var (
r uintptr
e syscall.Errno
)
for {
r, _, e = syscall.Syscall(syscall.SYS_WRITEV, uintptr(fd), uintptr(unsafe.Pointer(&iovecs[0])), uintptr(len(iovecs)))
if e != syscall.EINTR {
break
}
}
if e != 0 {
return r, e
}
return r, nil
}
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