// license that can be found in the LICENSE file.

//go:build aix || darwin || (openbsd && !mips64) || solaris

package syscall

import _ "unsafe"

// used by internal/poll

// consume removes data from a slice of byte slices, for writev.
func consume(v *[][]byte, n int64) {
	for len(*v) > 0 {
		ln0 := int64(len((*v)[0]))
		if ln0 > n {
			(*v)[0] = (*v)[0][n:]
			return
		}
		n -= ln0
		(*v)[0] = nil
		*v = (*v)[1:]
	}
}

// TestHookDidWritev is a hook for testing writev.
var TestHookDidWritev = func(wrote int) {}

// license that can be found in the LICENSE file.

//go:build dragonfly || freebsd || linux || netbsd || (openbsd && mips64)

package poll

import (
	"syscall"
	"unsafe"
)

func writev(fd int, iovecs []syscall.Iovec) (uintptr, error) {
	var (
		r uintptr
		e syscall.Errno
	)
	for {
		r, _, e = syscall.Syscall(syscall.SYS_WRITEV, uintptr(fd), uintptr(unsafe.Pointer(&iovecs[0])), uintptr(len(iovecs)))

	mp.printlock--
	if mp.printlock == 0 {
		unlock(&debuglock)
	}
}

// write to goroutine-local buffer if diverting output,
// or else standard error.
func gwrite(b []byte) {
	if len(b) == 0 {
		return
	}
	recordForPanic(b)
	gp := getg()
	// Don't use the writebuf if gp.m is dying. We want anything
	// written through gwrite to appear in the terminal rather

	buf := newsehbuf(ctxt, nodes)
	buf.write8(flags | 1)            // Flags + version
	buf.write8(uint8(movbp.Link.Pc)) // Size of prolog
	buf.write8(nodes)                // Count of nodes
	buf.write8(SEH_REG_BP)           // FP register

	// Notes are written in reverse order of appearance.
	buf.write8(uint8(movbp.Link.Pc))
	buf.writecode(UWOP_SET_FPREG, 0)

	buf.write8(uint8(pushbp.Link.Pc))

	// last.
	// And it's also annoying if it's possible for users to set
	// different TTLs per Answer.
	if w.a.wrote {
		return
	}
	w.a.ttl = seconds

}

type AWriter struct{ ResponseWriter }

func (w AWriter) AddIP(v4 [4]byte) {
	w.a.wrote = true
	err := w.a.builder.AResource(w.header(), dnsmessage.AResource{A: v4})
	if err != nil {
		panic(err)
	}
}

		}
		if n == 0 {
			return nn, io.ErrUnexpectedEOF
		}
	}
}

// Pwrite wraps the pwrite system call.
func (fd *FD) Pwrite(p []byte, off int64) (int, error) {
	// Call incref, not writeLock, because since pwrite specifies the
	// offset it is independent from other writes.
	// Similarly, using the poller doesn't make sense for pwrite.
	if err := fd.incref(); err != nil {
		return 0, err
	}
	defer fd.decref()

apiVersion: release-notes/v2
kind: bug-fix
area: traffic-management
releaseNotes:
  - |

//sys	Umask(newmask int) (oldmask int)
//sys	Undelete(path string) (err error)
//sys	Unlink(path string) (err error)
//sys	Unmount(path string, flags int) (err error)
//sys	write(fd int, p []byte) (n int, err error)
//sys	writev(fd int, iovecs []Iovec) (cnt uintptr, err error)
//sys   mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)

	n, err = f.pfd.Pread(b, off)
	runtime.KeepAlive(f)
	return n, err
}

// write writes len(b) bytes to the File.
// It returns the number of bytes written and an error, if any.
func (f *File) write(b []byte) (n int, err error) {
	n, err = f.pfd.Write(b)
	runtime.KeepAlive(f)
	return n, err
}

// pwrite writes len(b) bytes to the File starting at byte offset off.