| // Copyright 2016 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 fuchsia |
| |
| package zx |
| |
| import "unsafe" |
| |
| // Process-wide FDIO handles. |
| var ( |
| StdioHandles [3][3]Handle // 3 stdio files, each with up to 3 (fdio.MaxHandles) handles |
| StdioHandleTypes [3]int |
| CwdHandle Handle |
| ProcHandle Handle |
| VMARRoot VMAR |
| RootNSMap map[string]Handle |
| ) |
| |
| const ZX_CPRNG_DRAW_MAX_LEN = 256 |
| |
| type HandleInfo uint32 |
| |
| func NewHandleInfo(t, arg uint32) HandleInfo { |
| return HandleInfo((t & 0xFFFF) | ((arg & 0xFFFF) << 16)) |
| } |
| |
| func (hi HandleInfo) Type() uint32 { |
| return uint32(hi) & 0xFFFF |
| } |
| |
| func (hi HandleInfo) Arg() uint32 { |
| return (uint32(hi) >> 16) & 0xFFFF |
| } |
| |
| type Socket Handle |
| |
| func (s *Socket) Handle() *Handle { |
| return (*Handle)(s) |
| } |
| |
| func (s *Socket) Read(data []byte, flags uint32) (n int, err error) { |
| var actual uint |
| var p unsafe.Pointer |
| if len(data) > 0 { |
| p = unsafe.Pointer(&data[0]) |
| } |
| status := sys_socket_read(Handle(*s), flags, p, uint(len(data)), &actual) |
| if status != ErrOk { |
| return int(actual), Error{Status: status, Text: "zx.Socket.Read"} |
| } |
| return int(actual), nil |
| } |
| |
| func (s *Socket) Write(data []byte, flags uint32) (n int, err error) { |
| var p unsafe.Pointer |
| if len(data) > 0 { |
| p = unsafe.Pointer(&data[0]) |
| } |
| var actual uint |
| status := sys_socket_write(Handle(*s), flags, p, uint(len(data)), &actual) |
| if status != ErrOk { |
| return int(actual), Error{Status: status, Text: "zx.Socket.Write"} |
| } |
| return int(actual), nil |
| } |
| |
| func (s *Socket) Share(h Handle) error { |
| if status := sys_socket_share(Handle(*s), h); status != ErrOk { |
| return Error{Status: status, Text: "zx.Socket.Share"} |
| } |
| return nil |
| } |
| |
| func (s *Socket) Accept(h *Handle) error { |
| if status := sys_socket_accept(Handle(*s), h); status != ErrOk { |
| return Error{Status: status, Text: "zx.Socket.Accept"} |
| } |
| return nil |
| } |
| |
| func (s *Socket) Close() error { |
| h := Handle(*s) |
| err := h.Close() |
| *s = Socket(HandleInvalid) |
| return err |
| } |
| |
| func NewSocket(flags uint32) (s0, s1 Socket, err error) { |
| var h0, h1 Handle |
| if status := sys_socket_create(flags, &h0, &h1); status != ErrOk { |
| return Socket(HandleInvalid), Socket(HandleInvalid), Error{Status: status, Text: "zx.Socket"} |
| } |
| return Socket(h0), Socket(h1), nil |
| } |
| |
| type Event Handle |
| |
| func NewEvent(options uint32) (e Event, err error) { |
| var h Handle |
| if status := Sys_event_create(options, &h); status != ErrOk { |
| return Event(HandleInvalid), Error{Status: status, Text: "zx.Event"} |
| } |
| return Event(h), nil |
| } |
| |
| func (e *Event) Handle() *Handle { |
| return (*Handle)(e) |
| } |
| |
| func (e *Event) Close() error { |
| h := Handle(*e) |
| err := h.Close() |
| *e = Event(HandleInvalid) |
| return err |
| } |
| |
| func (e *Event) Duplicate(rights Rights) (Event, error) { |
| h := Handle(*e) |
| h, err := h.Duplicate(rights) |
| if err != nil { |
| return Event(HandleInvalid), err |
| } |
| return Event(h), nil |
| } |
| |
| func (h *Handle) Close() error { |
| if status := Sys_handle_close(*h); status != ErrOk { |
| return Error{Status: status, Text: "zx.Handle.Close"} |
| } |
| *h = HandleInvalid |
| return nil |
| } |
| |
| func (h *Handle) Duplicate(rights Rights) (Handle, error) { |
| var dup Handle |
| if status := sys_handle_duplicate(*h, rights, &dup); status != ErrOk { |
| return HandleInvalid, Error{Status: status, Text: "zx.Handle.Duplicate"} |
| } |
| return dup, nil |
| } |
| |
| func (h *Handle) Signal(clearMask, setMask Signals) error { |
| if status := Sys_object_signal(*h, uint32(clearMask), uint32(setMask)); status != ErrOk { |
| return Error{Status: status, Text: "zx.Handle.Signal"} |
| } |
| return nil |
| } |
| |
| func (h *Handle) SignalPeer(clearMask, setMask Signals) error { |
| if status := Sys_object_signal_peer(*h, uint32(clearMask), uint32(setMask)); status != ErrOk { |
| return Error{Status: status, Text: "zx.Handle.SignalPeer"} |
| } |
| return nil |
| } |
| |
| func (h *Handle) SetCookie(scope Handle, cookie uint64) error { |
| if status := Sys_object_set_cookie(*h, scope, cookie); status != ErrOk { |
| return Error{Status: status, Text: "zx.Handle.SetCookie"} |
| } |
| return nil |
| } |
| |
| func (h *Handle) GetCookie(scope Handle) (uint64, error) { |
| var cookie uint64 |
| if status := Sys_object_get_cookie(*h, scope, &cookie); status != ErrOk { |
| return 0, Error{Status: status, Text: "zx.Handle.GetCookie"} |
| } |
| return cookie, nil |
| } |
| |
| func (h *Handle) GetProperty(property uint32, data []byte) error { |
| var numBytes = uint(len(data)) |
| var dataPtr unsafe.Pointer |
| if numBytes > 0 { |
| dataPtr = unsafe.Pointer(&data[0]) |
| } |
| if status := Sys_object_get_property(*h, property, dataPtr, numBytes); status != ErrOk { |
| return Error{Status: status, Text: "zx.Handle.GetProperty"} |
| } |
| return nil |
| } |
| |
| func (h *Handle) SetProperty(property uint32, data []byte) error { |
| var numBytes = uint(len(data)) |
| var dataPtr unsafe.Pointer |
| if numBytes > 0 { |
| dataPtr = unsafe.Pointer(&data[0]) |
| } |
| if status := Sys_object_set_property(*h, property, dataPtr, numBytes); status != ErrOk { |
| return Error{Status: status, Text: "zx.Handle.SetProperty"} |
| } |
| return nil |
| } |
| |
| func (h *Handle) IsValid() bool { |
| return *h > HandleInvalid |
| } |
| |
| func WaitMany(items []WaitItem, timeout Time) error { |
| if status := sys_object_wait_many(&items[0], uint(len(items)), timeout); status != ErrOk { |
| return Error{Status: status, Text: "zx.Handle.WaitMany"} |
| } |
| return nil |
| } |
| |
| const ( |
| ChannelMaxMessageBytes = 65536 |
| ChannelMaxMessageHandles = 64 |
| ) |
| |
| type Channel Handle |
| |
| func (c *Channel) Handle() *Handle { |
| return (*Handle)(c) |
| } |
| |
| func (c *Channel) Close() error { |
| h := Handle(*c) |
| err := h.Close() |
| *c = Channel(HandleInvalid) |
| return err |
| } |
| |
| func (c *Channel) Read(data []byte, handles []Handle, flags uint32) (numBytes, numHandles uint32, err error) { |
| numBytes = uint32(len(data)) |
| numHandles = uint32(len(handles)) |
| var dataPtr unsafe.Pointer |
| if len(data) > 0 { |
| dataPtr = unsafe.Pointer(&data[0]) |
| } |
| var handlePtr *Handle |
| if len(handles) > 0 { |
| handlePtr = &handles[0] |
| } |
| if status := sys_channel_read(Handle(*c), flags, dataPtr, handlePtr, numBytes, numHandles, &numBytes, &numHandles); status != ErrOk { |
| err = Error{Status: status, Text: "zx.Channel.Read"} |
| } |
| return numBytes, numHandles, err |
| } |
| |
| func (c *Channel) Write(data []byte, handles []Handle, flags uint32) error { |
| var dataPtr unsafe.Pointer |
| if len(data) > 0 { |
| dataPtr = unsafe.Pointer(&data[0]) |
| } |
| var handlePtr *Handle |
| if len(handles) > 0 { |
| handlePtr = &handles[0] |
| } |
| status := sys_channel_write(Handle(*c), flags, dataPtr, uint32(len(data)), handlePtr, uint32(len(handles))) |
| if status != ErrOk { |
| return Error{Status: status, Text: "zx.Channel.Write"} |
| } |
| return nil |
| } |
| |
| func (c *Channel) Call(flags uint32, deadline Time, wData []byte, wHandles []Handle, rData []byte, rHandles []Handle) (actualBytes, actualHandles uint32, err error) { |
| var writeDataPtr uintptr |
| if len(wData) > 0 { |
| writeDataPtr = uintptr(unsafe.Pointer(&wData[0])) |
| } |
| var writeHandlePtr *Handle |
| if len(wHandles) > 0 { |
| writeHandlePtr = &wHandles[0] |
| } |
| var readDataPtr uintptr |
| if len(rData) > 0 { |
| readDataPtr = uintptr(unsafe.Pointer(&rData[0])) |
| } |
| var readHandlePtr *Handle |
| if len(rHandles) > 0 { |
| readHandlePtr = &rHandles[0] |
| } |
| args := &ChannelCallArgs{ |
| WriteBytes: writeDataPtr, |
| WriteHandles: writeHandlePtr, |
| ReadBytes: readDataPtr, |
| ReadHandles: readHandlePtr, |
| WriteNumBytes: uint32(len(wData)), |
| WriteNumHandles: uint32(len(wHandles)), |
| ReadNumBytes: uint32(len(rData)), |
| ReadNumHandles: uint32(len(rHandles)), |
| } |
| |
| status := Sys_channel_call(Handle(*c), flags, deadline, args, &actualBytes, &actualHandles) |
| if status != ErrOk { |
| err = Error{Status: status, Text: "zx.Channel.Call"} |
| } |
| return actualBytes, actualHandles, err |
| } |
| |
| func NewChannel(flags uint32) (c0, c1 Channel, err error) { |
| var h0, h1 Handle |
| if status := sys_channel_create(flags, &h0, &h1); status != ErrOk { |
| return Channel(HandleInvalid), Channel(HandleInvalid), Error{Status: status, Text: "zx.Channel"} |
| } |
| return Channel(h0), Channel(h1), nil |
| } |
| |
| const ( |
| PortWaitAsyncOnce = iota |
| PortWaitAsyncRepeating |
| ) |
| |
| const ( |
| PortPacketTypeUser = iota |
| PortPacketTypeSignalOne |
| PortPacketTypeSignalRepeating |
| ) |
| |
| const ( |
| PacketHeaderSize = uint(unsafe.Sizeof(PacketHeader{})) |
| PacketMaxSize = uint(unsafe.Sizeof(Packet{})) |
| ) |
| |
| type PacketHeader struct { |
| Key uint64 |
| Type uint32 |
| Extra uint32 |
| } |
| |
| // Packet describes the unit of communication via an FDIO protocol |
| type Packet struct { |
| Hdr PacketHeader |
| Bytes [32]uint8 |
| } |
| |
| func (p *Packet) Signal() *PacketSignal { |
| return (*PacketSignal)(unsafe.Pointer(p)) |
| } |
| |
| type PortPacket interface { |
| Header() *PacketHeader |
| Length() int |
| } |
| |
| // PacketSignal describes packets of type PortPacketTypeSignal |
| type PacketSignal struct { |
| Hdr PacketHeader |
| Trigger Signals |
| Observed Signals |
| Count uint64 |
| } |
| |
| func (s *PacketSignal) Header() *PacketHeader { |
| return &s.Hdr |
| } |
| |
| func (s *PacketSignal) Length() int { |
| return int(unsafe.Sizeof(*s)) |
| } |
| |
| type Port Handle |
| |
| func (p *Port) Handle() *Handle { |
| return (*Handle)(p) |
| } |
| |
| func (p *Port) Close() error { |
| h := Handle(*p) |
| err := h.Close() |
| *p = Port(HandleInvalid) |
| return err |
| } |
| |
| // Queue a PortPacket, which may have a varying size. |
| func (p *Port) Queue(packet PortPacket) error { |
| if status := Sys_port_queue(Handle(*p), (*int)(unsafe.Pointer(packet.Header()))); status != ErrOk { |
| return Error{Status: status, Text: "zx.Port.Queue"} |
| } |
| return nil |
| } |
| |
| // Wait for a Packet, which must be as large as the largest |
| // possible packet that may be received. |
| func (p *Port) Wait(packet *Packet, deadline Time) error { |
| if status := Sys_port_wait(Handle(*p), deadline, (*int)(unsafe.Pointer(packet))); status != ErrOk { |
| return Error{Status: status, Text: "zx.Port.Wait"} |
| } |
| return nil |
| } |
| |
| func (p *Port) Cancel(source Handle, key uint64) error { |
| if status := Sys_port_cancel(Handle(*p), source, key); status != ErrOk { |
| return Error{Status: status, Text: "zx.Port.Cancel"} |
| } |
| return nil |
| } |
| |
| func (p *Port) WaitAsync(handle Handle, key uint64, signals Signals, options uint32) error { |
| if status := Sys_object_wait_async(handle, Handle(*p), key, signals, options); status != ErrOk { |
| return Error{Status: status, Text: "fdio.Port.WaitAsync"} |
| } |
| return nil |
| } |
| |
| func NewPort(options uint32) (Port, error) { |
| var h Handle |
| if status := Sys_port_create(options, &h); status != ErrOk { |
| return Port(HandleInvalid), Error{Status: status, Text: "zx.Port"} |
| } |
| return Port(h), nil |
| } |
| |
| type VMO Handle |
| |
| func (vmo *VMO) Handle() *Handle { |
| return (*Handle)(vmo) |
| } |
| |
| func (vmo *VMO) Clone(options uint32, offset, size uint64) (VMO, error) { |
| var h Handle |
| if status := Sys_vmo_clone(Handle(*vmo), options, offset, size, &h); status != ErrOk { |
| return VMO(HandleInvalid), Error{Status: status, Text: "zx.VMO.Clone"} |
| } |
| return VMO(h), nil |
| } |
| |
| func (vmo *VMO) Read(b []byte, offset uint64) error { |
| if status := sys_vmo_read(Handle(*vmo), unsafe.Pointer(&b[0]), offset, uint(len(b))); status != ErrOk { |
| return Error{Status: status, Text: "zx.VMO.Read"} |
| } |
| return nil |
| } |
| |
| func (vmo *VMO) Write(b []byte, offset uint64) error { |
| if status := sys_vmo_write(Handle(*vmo), unsafe.Pointer(&b[0]), offset, uint(len(b))); status != ErrOk { |
| return Error{Status: status, Text: "zx.VMO.Write"} |
| } |
| return nil |
| } |
| |
| func (vmo *VMO) Size() (uint64, error) { |
| var size uint64 |
| if status := sys_vmo_get_size(Handle(*vmo), &size); status != ErrOk { |
| return size, Error{Status: status, Text: "zx.VMO.Size"} |
| } |
| return size, nil |
| } |
| |
| func (vmo *VMO) SetSize(size uint64) error { |
| if status := sys_vmo_set_size(Handle(*vmo), size); status != ErrOk { |
| return Error{Status: status, Text: "zx.VMO.SetSize"} |
| } |
| return nil |
| } |
| |
| func (vmo *VMO) OpRange(op uint32, offset, size uint64, b []byte) error { |
| if status := sys_vmo_op_range(Handle(*vmo), op, offset, size, unsafe.Pointer(&b[0]), uint(len(b))); status != ErrOk { |
| return Error{Status: status, Text: "zx.VMO.OpRange"} |
| } |
| return nil |
| } |
| |
| func (vmo *VMO) Close() error { |
| h := Handle(*vmo) |
| err := h.Close() |
| *vmo = VMO(HandleInvalid) |
| return err |
| } |
| |
| func NewVMO(size uint64, options VMOOption) (VMO, error) { |
| var h Handle |
| if status := Sys_vmo_create(size, uint32(options), &h); status != ErrOk { |
| return VMO(HandleInvalid), Error{Status: status, Text: "zx.VMO"} |
| } |
| return VMO(h), nil |
| } |
| |
| type VMAR Handle |
| |
| func (v VMAR) Destroy() error { |
| if status := sys_vmar_destroy(Handle(v)); status != ErrOk { |
| return Error{Status: status, Text: "zx.VMAR.Destroy"} |
| } |
| return nil |
| } |
| |
| var mapErr error = Error{Status: 1, Text: "zx.VMAR.Map"} |
| |
| func (v VMAR) Map(vmarOffset uint64, vmo VMO, vmoOffset, len uint64, flags VMFlag) (addr uintptr, err error) { |
| status := sys_vmar_map_old(Handle(v), uint64(vmarOffset), Handle(vmo), vmoOffset, uint64(len), uint32(flags), (*Vaddr)(&addr)) |
| if status != ErrOk { |
| println("zx.VMAR.Map failed: status: ", status) |
| return 0, mapErr |
| } |
| return addr, nil |
| } |
| |
| var unmapErr error = Error{Status: 1, Text: "zx.VMAR.Unmap"} |
| |
| func (v VMAR) Unmap(addr uintptr, len uint64) error { |
| status := Sys_vmar_unmap(Handle(v), Vaddr(addr), uint64(len)) |
| if status != ErrOk { |
| println(status) |
| return unmapErr |
| } |
| return nil |
| } |
| |
| func (v VMAR) Protect(addr uintptr, len uint64, flags VMFlag) error { |
| status := sys_vmar_protect_old(Handle(v), Vaddr(addr), uint64(len), uint32(flags)) |
| if status != ErrOk { |
| return Error{Status: status, Text: "zx.VMAR.Protect"} |
| } |
| return nil |
| } |
| |
| func NewVMAR(parent VMAR, offset, size uint64, flags VMFlag) (child VMAR, addr uintptr, err error) { |
| var childHandle Handle |
| status := sys_vmar_allocate_old(Handle(parent), uint64(offset), uint64(size), uint32(flags), &childHandle, (*Vaddr)(&addr)) |
| if status != ErrOk { |
| return 0, 0, Error{Status: status, Text: "zx.NewVMAR"} |
| } |
| return VMAR(childHandle), addr, nil |
| } |
| |
| type Log Handle |
| |
| func NewLog(options uint32) Log { |
| var h Handle |
| status := Sys_debuglog_create(HandleInvalid, options, &h) |
| if status != ErrOk { |
| return Log(HandleInvalid) |
| } |
| return Log(h) |
| } |
| |
| func (l *Log) Handle() *Handle { |
| return (*Handle)(l) |
| } |
| |
| func (l Log) Write(b []byte) (n int, err error) { |
| status := Sys_log_write(Handle(l), uint32(len(b)), unsafe.Pointer(&b[0]), 0) |
| if status != ErrOk { |
| return 0, Error{Status: status, Text: "zx.Log.Write"} |
| } |
| return len(b), nil |
| } |
| |
| func (l Log) Read(b []byte) (n int, err error) { |
| status := Sys_log_read(Handle(l), uint32(len(b)), unsafe.Pointer(&b[0]), 0) |
| if status != ErrOk { |
| return 0, Error{Status: status, Text: "zx.Log.Read"} |
| } |
| return len(b), nil |
| } |
| |
| func (l *Log) Close() (err error) { |
| h := Handle(*l) |
| err = h.Close() |
| *l = Log(HandleInvalid) |
| return err |
| } |
| |
| func RandRead(b []byte) { |
| Sys_cprng_draw(unsafe.Pointer(&b[0]), uint(len(b))) |
| } |
| |
| // Error is a Status with associated error text. |
| // It is used as a Go error. |
| type Error struct { |
| Status Status |
| Text string |
| } |
| |
| func (e Error) Error() string { |
| if e.Text == "" { |
| return "zx.Status: " + e.Status.String() |
| } |
| return e.Status.String() + ": " + e.Text |
| } |