github.com/code-reading/golang@v0.0.0-20220303082512-ba5bc0e589a3/go/src/net/writev_unix.go (about)

     1  // Copyright 2016 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 darwin || dragonfly || freebsd || illumos || linux || netbsd || openbsd
     6  // +build darwin dragonfly freebsd illumos linux netbsd openbsd
     7  
     8  package net
     9  
    10  import (
    11  	"runtime"
    12  	"syscall"
    13  )
    14  
    15  func (c *conn) writeBuffers(v *Buffers) (int64, error) {
    16  	if !c.ok() {
    17  		return 0, syscall.EINVAL
    18  	}
    19  	n, err := c.fd.writeBuffers(v)
    20  	if err != nil {
    21  		return n, &OpError{Op: "writev", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
    22  	}
    23  	return n, nil
    24  }
    25  
    26  func (fd *netFD) writeBuffers(v *Buffers) (n int64, err error) {
    27  	n, err = fd.pfd.Writev((*[][]byte)(v))
    28  	runtime.KeepAlive(fd)
    29  	return n, wrapSyscallError("writev", err)
    30  }