gitee.com/ks-custle/core-gm@v0.0.0-20230922171213-b83bdd97b62c/internal/syscall/unix/writev_illumos.go (about)

     1  // Copyright 2020 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 illumos
     6  // +build illumos
     7  
     8  package unix
     9  
    10  import (
    11  	"syscall"
    12  	"unsafe"
    13  )
    14  
    15  //go:cgo_import_dynamic libc_writev writev "libc.so"
    16  
    17  //go:linkname procwritev libc_writev
    18  
    19  var procwritev uintptr
    20  
    21  func Writev(fd int, iovs []syscall.Iovec) (uintptr, error) {
    22  	var p *syscall.Iovec
    23  	if len(iovs) > 0 {
    24  		p = &iovs[0]
    25  	}
    26  	n, _, errno := syscall6(uintptr(unsafe.Pointer(&procwritev)), 3, uintptr(fd), uintptr(unsafe.Pointer(p)), uintptr(len(iovs)), 0, 0, 0)
    27  	if errno != 0 {
    28  		return 0, errno
    29  	}
    30  	return n, nil
    31  }