go writev_illumos 源码
golang writev_illumos 代码
文件路径：/src/internal/syscall/unix/writev_illumos.go
// Copyright 2020 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 illumos
package unix
import (
"syscall"
"unsafe"
)
//go:cgo_import_dynamic libc_writev writev "libc.so"
//go:linkname procwritev libc_writev
var procwritev uintptr
func Writev(fd int, iovs []syscall.Iovec) (uintptr, error) {
var p *syscall.Iovec
if len(iovs) > 0 {
p = &iovs[0]
}
n, _, errno := syscall6(uintptr(unsafe.Pointer(&procwritev)), 3, uintptr(fd), uintptr(unsafe.Pointer(p)), uintptr(len(iovs)), 0, 0, 0)
if errno != 0 {
return 0, errno
}
return n, nil
}
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