github.com/SandwichDev/go-internals@v0.0.0-20210605002614-12311ac6b2c5/poll/fd_writev_unix.go (about)

     1  // Copyright 2018 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  // +build dragonfly freebsd linux netbsd openbsd
     6  
     7  package poll
     8  
     9  import (
    10  	"syscall"
    11  	"unsafe"
    12  )
    13  
    14  func writev(fd int, iovecs []syscall.Iovec) (uintptr, error) {
    15  	var (
    16  		r uintptr
    17  		e syscall.Errno
    18  	)
    19  	for {
    20  		r, _, e = syscall.Syscall(syscall.SYS_WRITEV, uintptr(fd), uintptr(unsafe.Pointer(&iovecs[0])), uintptr(len(iovecs)))
    21  		if e != syscall.EINTR {
    22  			break
    23  		}
    24  	}
    25  	if e != 0 {
    26  		return r, e
    27  	}
    28  	return r, nil
    29  }