// Copyright 2009 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.

// +build amd64,freebsd

package unix

import (

	"syscall"

	"unsafe"

)

func setTimespec(sec, nsec int64) Timespec {

	return Timespec{Sec: sec, Nsec: nsec}

}

func setTimeval(sec, usec int64) Timeval {

	return Timeval{Sec: sec, Usec: usec}

}

func SetKevent(k *Kevent_t, fd, mode, flags int) {

	k.Ident = uint64(fd)

	k.Filter = int16(mode)

	k.Flags = uint16(flags)

}

func (iov *Iovec) SetLen(length int) {

	iov.Len = uint64(length)

}

func (msghdr *Msghdr) SetControllen(length int) {

	msghdr.Controllen = uint32(length)

}

func (msghdr *Msghdr) SetIovlen(length int) {

	msghdr.Iovlen = int32(length)

}

func (cmsg *Cmsghdr) SetLen(length int) {

	cmsg.Len = uint32(length)

}

func sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {

	var writtenOut uint64 = 0

	_, _, e1 := Syscall9(SYS_SENDFILE, uintptr(infd), uintptr(outfd), uintptr(*offset), uintptr(count), 0, uintptr(unsafe.Pointer(&writtenOut)), 0, 0, 0)

	written = int(writtenOut)

	if e1 != 0 {

		err = e1

	}

	return

}

func Syscall9(num, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err syscall.Errno)

func PtraceIO(req int, pid int, addr uintptr, out []byte, countin int) (count int, err error) {

	ioDesc := PtraceIoDesc{Op: int32(req), Offs: (*byte)(unsafe.Pointer(addr)), Addr: (*byte)(unsafe.Pointer(&out[0])), Len: uint64(countin)}

	err = ptrace(PTRACE_IO, pid, uintptr(unsafe.Pointer(&ioDesc)), 0)

	return int(ioDesc.Len), err

}