vendor: Add github.com/godbus/dbus
Signed-off-by: Michal Rostecki <mrostecki@suse.com>
This commit is contained in:
Michal Rostecki
committed by
Michael Cambria
Michael Cambria
parent
d096a4df48
commit
eb66fc201c
767
vendor/github.com/godbus/dbus/conn.go
generated
vendored
Normal file
767
vendor/github.com/godbus/dbus/conn.go
generated
vendored
Normal file
@ -0,0 +1,767 @@
|
||||
package dbus
|
||||
|
||||
import (
|
||||
"errors"
|
||||
"io"
|
||||
"os"
|
||||
"reflect"
|
||||
"strings"
|
||||
"sync"
|
||||
)
|
||||
|
||||
var (
|
||||
systemBus *Conn
|
||||
systemBusLck sync.Mutex
|
||||
sessionBus *Conn
|
||||
sessionBusLck sync.Mutex
|
||||
sessionEnvLck sync.Mutex
|
||||
)
|
||||
|
||||
// ErrClosed is the error returned by calls on a closed connection.
|
||||
var ErrClosed = errors.New("dbus: connection closed by user")
|
||||
|
||||
// Conn represents a connection to a message bus (usually, the system or
|
||||
// session bus).
|
||||
//
|
||||
// Connections are either shared or private. Shared connections
|
||||
// are shared between calls to the functions that return them. As a result,
|
||||
// the methods Close, Auth and Hello must not be called on them.
|
||||
//
|
||||
// Multiple goroutines may invoke methods on a connection simultaneously.
|
||||
type Conn struct {
|
||||
transport
|
||||
|
||||
busObj BusObject
|
||||
unixFD bool
|
||||
uuid string
|
||||
|
||||
names *nameTracker
|
||||
|
||||
serialGen *serialGenerator
|
||||
|
||||
calls *callTracker
|
||||
|
||||
handler Handler
|
||||
|
||||
outHandler *outputHandler
|
||||
|
||||
signalHandler SignalHandler
|
||||
|
||||
eavesdropped chan<- *Message
|
||||
eavesdroppedLck sync.Mutex
|
||||
}
|
||||
|
||||
// SessionBus returns a shared connection to the session bus, connecting to it
|
||||
// if not already done.
|
||||
func SessionBus() (conn *Conn, err error) {
|
||||
sessionBusLck.Lock()
|
||||
defer sessionBusLck.Unlock()
|
||||
if sessionBus != nil {
|
||||
return sessionBus, nil
|
||||
}
|
||||
defer func() {
|
||||
if conn != nil {
|
||||
sessionBus = conn
|
||||
}
|
||||
}()
|
||||
conn, err = SessionBusPrivate()
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
if err = conn.Auth(nil); err != nil {
|
||||
conn.Close()
|
||||
conn = nil
|
||||
return
|
||||
}
|
||||
if err = conn.Hello(); err != nil {
|
||||
conn.Close()
|
||||
conn = nil
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func getSessionBusAddress() (string, error) {
|
||||
sessionEnvLck.Lock()
|
||||
defer sessionEnvLck.Unlock()
|
||||
address := os.Getenv("DBUS_SESSION_BUS_ADDRESS")
|
||||
if address != "" && address != "autolaunch:" {
|
||||
return address, nil
|
||||
}
|
||||
return getSessionBusPlatformAddress()
|
||||
}
|
||||
|
||||
// SessionBusPrivate returns a new private connection to the session bus.
|
||||
func SessionBusPrivate() (*Conn, error) {
|
||||
address, err := getSessionBusAddress()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return Dial(address)
|
||||
}
|
||||
|
||||
// SessionBusPrivate returns a new private connection to the session bus.
|
||||
func SessionBusPrivateHandler(handler Handler, signalHandler SignalHandler) (*Conn, error) {
|
||||
address, err := getSessionBusAddress()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return DialHandler(address, handler, signalHandler)
|
||||
}
|
||||
|
||||
// SystemBus returns a shared connection to the system bus, connecting to it if
|
||||
// not already done.
|
||||
func SystemBus() (conn *Conn, err error) {
|
||||
systemBusLck.Lock()
|
||||
defer systemBusLck.Unlock()
|
||||
if systemBus != nil {
|
||||
return systemBus, nil
|
||||
}
|
||||
defer func() {
|
||||
if conn != nil {
|
||||
systemBus = conn
|
||||
}
|
||||
}()
|
||||
conn, err = SystemBusPrivate()
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
if err = conn.Auth(nil); err != nil {
|
||||
conn.Close()
|
||||
conn = nil
|
||||
return
|
||||
}
|
||||
if err = conn.Hello(); err != nil {
|
||||
conn.Close()
|
||||
conn = nil
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
// SystemBusPrivate returns a new private connection to the system bus.
|
||||
func SystemBusPrivate() (*Conn, error) {
|
||||
return Dial(getSystemBusPlatformAddress())
|
||||
}
|
||||
|
||||
// SystemBusPrivateHandler returns a new private connection to the system bus, using the provided handlers.
|
||||
func SystemBusPrivateHandler(handler Handler, signalHandler SignalHandler) (*Conn, error) {
|
||||
return DialHandler(getSystemBusPlatformAddress(), handler, signalHandler)
|
||||
}
|
||||
|
||||
// Dial establishes a new private connection to the message bus specified by address.
|
||||
func Dial(address string) (*Conn, error) {
|
||||
tr, err := getTransport(address)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return newConn(tr, NewDefaultHandler(), NewDefaultSignalHandler())
|
||||
}
|
||||
|
||||
// DialHandler establishes a new private connection to the message bus specified by address, using the supplied handlers.
|
||||
func DialHandler(address string, handler Handler, signalHandler SignalHandler) (*Conn, error) {
|
||||
tr, err := getTransport(address)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return newConn(tr, handler, signalHandler)
|
||||
}
|
||||
|
||||
// NewConn creates a new private *Conn from an already established connection.
|
||||
func NewConn(conn io.ReadWriteCloser) (*Conn, error) {
|
||||
return NewConnHandler(conn, NewDefaultHandler(), NewDefaultSignalHandler())
|
||||
}
|
||||
|
||||
// NewConnHandler creates a new private *Conn from an already established connection, using the supplied handlers.
|
||||
func NewConnHandler(conn io.ReadWriteCloser, handler Handler, signalHandler SignalHandler) (*Conn, error) {
|
||||
return newConn(genericTransport{conn}, handler, signalHandler)
|
||||
}
|
||||
|
||||
// newConn creates a new *Conn from a transport.
|
||||
func newConn(tr transport, handler Handler, signalHandler SignalHandler) (*Conn, error) {
|
||||
conn := new(Conn)
|
||||
conn.transport = tr
|
||||
conn.calls = newCallTracker()
|
||||
conn.handler = handler
|
||||
conn.signalHandler = signalHandler
|
||||
conn.outHandler = &outputHandler{conn: conn}
|
||||
conn.serialGen = newSerialGenerator()
|
||||
conn.names = newNameTracker()
|
||||
conn.busObj = conn.Object("org.freedesktop.DBus", "/org/freedesktop/DBus")
|
||||
return conn, nil
|
||||
}
|
||||
|
||||
// BusObject returns the object owned by the bus daemon which handles
|
||||
// administrative requests.
|
||||
func (conn *Conn) BusObject() BusObject {
|
||||
return conn.busObj
|
||||
}
|
||||
|
||||
// Close closes the connection. Any blocked operations will return with errors
|
||||
// and the channels passed to Eavesdrop and Signal are closed. This method must
|
||||
// not be called on shared connections.
|
||||
func (conn *Conn) Close() error {
|
||||
conn.outHandler.close()
|
||||
if term, ok := conn.signalHandler.(Terminator); ok {
|
||||
term.Terminate()
|
||||
}
|
||||
|
||||
if term, ok := conn.handler.(Terminator); ok {
|
||||
term.Terminate()
|
||||
}
|
||||
|
||||
conn.eavesdroppedLck.Lock()
|
||||
if conn.eavesdropped != nil {
|
||||
close(conn.eavesdropped)
|
||||
}
|
||||
conn.eavesdroppedLck.Unlock()
|
||||
|
||||
return conn.transport.Close()
|
||||
}
|
||||
|
||||
// Eavesdrop causes conn to send all incoming messages to the given channel
|
||||
// without further processing. Method replies, errors and signals will not be
|
||||
// sent to the appropiate channels and method calls will not be handled. If nil
|
||||
// is passed, the normal behaviour is restored.
|
||||
//
|
||||
// The caller has to make sure that ch is sufficiently buffered;
|
||||
// if a message arrives when a write to ch is not possible, the message is
|
||||
// discarded.
|
||||
func (conn *Conn) Eavesdrop(ch chan<- *Message) {
|
||||
conn.eavesdroppedLck.Lock()
|
||||
conn.eavesdropped = ch
|
||||
conn.eavesdroppedLck.Unlock()
|
||||
}
|
||||
|
||||
// getSerial returns an unused serial.
|
||||
func (conn *Conn) getSerial() uint32 {
|
||||
return conn.serialGen.getSerial()
|
||||
}
|
||||
|
||||
// Hello sends the initial org.freedesktop.DBus.Hello call. This method must be
|
||||
// called after authentication, but before sending any other messages to the
|
||||
// bus. Hello must not be called for shared connections.
|
||||
func (conn *Conn) Hello() error {
|
||||
var s string
|
||||
err := conn.busObj.Call("org.freedesktop.DBus.Hello", 0).Store(&s)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
conn.names.acquireUniqueConnectionName(s)
|
||||
return nil
|
||||
}
|
||||
|
||||
// inWorker runs in an own goroutine, reading incoming messages from the
|
||||
// transport and dispatching them appropiately.
|
||||
func (conn *Conn) inWorker() {
|
||||
for {
|
||||
msg, err := conn.ReadMessage()
|
||||
if err != nil {
|
||||
if _, ok := err.(InvalidMessageError); !ok {
|
||||
// Some read error occured (usually EOF); we can't really do
|
||||
// anything but to shut down all stuff and returns errors to all
|
||||
// pending replies.
|
||||
conn.Close()
|
||||
conn.calls.finalizeAllWithError(err)
|
||||
return
|
||||
}
|
||||
// invalid messages are ignored
|
||||
continue
|
||||
}
|
||||
conn.eavesdroppedLck.Lock()
|
||||
if conn.eavesdropped != nil {
|
||||
select {
|
||||
case conn.eavesdropped <- msg:
|
||||
default:
|
||||
}
|
||||
conn.eavesdroppedLck.Unlock()
|
||||
continue
|
||||
}
|
||||
conn.eavesdroppedLck.Unlock()
|
||||
dest, _ := msg.Headers[FieldDestination].value.(string)
|
||||
found := dest == "" ||
|
||||
!conn.names.uniqueNameIsKnown() ||
|
||||
conn.names.isKnownName(dest)
|
||||
if !found {
|
||||
// Eavesdropped a message, but no channel for it is registered.
|
||||
// Ignore it.
|
||||
continue
|
||||
}
|
||||
switch msg.Type {
|
||||
case TypeError:
|
||||
conn.serialGen.retireSerial(conn.calls.handleDBusError(msg))
|
||||
case TypeMethodReply:
|
||||
conn.serialGen.retireSerial(conn.calls.handleReply(msg))
|
||||
case TypeSignal:
|
||||
conn.handleSignal(msg)
|
||||
case TypeMethodCall:
|
||||
go conn.handleCall(msg)
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
func (conn *Conn) handleSignal(msg *Message) {
|
||||
iface := msg.Headers[FieldInterface].value.(string)
|
||||
member := msg.Headers[FieldMember].value.(string)
|
||||
// as per http://dbus.freedesktop.org/doc/dbus-specification.html ,
|
||||
// sender is optional for signals.
|
||||
sender, _ := msg.Headers[FieldSender].value.(string)
|
||||
if iface == "org.freedesktop.DBus" && sender == "org.freedesktop.DBus" {
|
||||
if member == "NameLost" {
|
||||
// If we lost the name on the bus, remove it from our
|
||||
// tracking list.
|
||||
name, ok := msg.Body[0].(string)
|
||||
if !ok {
|
||||
panic("Unable to read the lost name")
|
||||
}
|
||||
conn.names.loseName(name)
|
||||
} else if member == "NameAcquired" {
|
||||
// If we acquired the name on the bus, add it to our
|
||||
// tracking list.
|
||||
name, ok := msg.Body[0].(string)
|
||||
if !ok {
|
||||
panic("Unable to read the acquired name")
|
||||
}
|
||||
conn.names.acquireName(name)
|
||||
}
|
||||
}
|
||||
signal := &Signal{
|
||||
Sender: sender,
|
||||
Path: msg.Headers[FieldPath].value.(ObjectPath),
|
||||
Name: iface + "." + member,
|
||||
Body: msg.Body,
|
||||
}
|
||||
conn.signalHandler.DeliverSignal(iface, member, signal)
|
||||
}
|
||||
|
||||
// Names returns the list of all names that are currently owned by this
|
||||
// connection. The slice is always at least one element long, the first element
|
||||
// being the unique name of the connection.
|
||||
func (conn *Conn) Names() []string {
|
||||
return conn.names.listKnownNames()
|
||||
}
|
||||
|
||||
// Object returns the object identified by the given destination name and path.
|
||||
func (conn *Conn) Object(dest string, path ObjectPath) BusObject {
|
||||
return &Object{conn, dest, path}
|
||||
}
|
||||
|
||||
// outWorker runs in an own goroutine, encoding and sending messages that are
|
||||
// sent to conn.out.
|
||||
func (conn *Conn) sendMessage(msg *Message) {
|
||||
conn.sendMessageAndIfClosed(msg, func() {})
|
||||
}
|
||||
|
||||
func (conn *Conn) sendMessageAndIfClosed(msg *Message, ifClosed func()) {
|
||||
err := conn.outHandler.sendAndIfClosed(msg, ifClosed)
|
||||
conn.calls.handleSendError(msg, err)
|
||||
if err != nil {
|
||||
conn.serialGen.retireSerial(msg.serial)
|
||||
} else if msg.Type != TypeMethodCall {
|
||||
conn.serialGen.retireSerial(msg.serial)
|
||||
}
|
||||
}
|
||||
|
||||
// Send sends the given message to the message bus. You usually don't need to
|
||||
// use this; use the higher-level equivalents (Call / Go, Emit and Export)
|
||||
// instead. If msg is a method call and NoReplyExpected is not set, a non-nil
|
||||
// call is returned and the same value is sent to ch (which must be buffered)
|
||||
// once the call is complete. Otherwise, ch is ignored and a Call structure is
|
||||
// returned of which only the Err member is valid.
|
||||
func (conn *Conn) Send(msg *Message, ch chan *Call) *Call {
|
||||
var call *Call
|
||||
|
||||
msg.serial = conn.getSerial()
|
||||
if msg.Type == TypeMethodCall && msg.Flags&FlagNoReplyExpected == 0 {
|
||||
if ch == nil {
|
||||
ch = make(chan *Call, 5)
|
||||
} else if cap(ch) == 0 {
|
||||
panic("dbus: unbuffered channel passed to (*Conn).Send")
|
||||
}
|
||||
call = new(Call)
|
||||
call.Destination, _ = msg.Headers[FieldDestination].value.(string)
|
||||
call.Path, _ = msg.Headers[FieldPath].value.(ObjectPath)
|
||||
iface, _ := msg.Headers[FieldInterface].value.(string)
|
||||
member, _ := msg.Headers[FieldMember].value.(string)
|
||||
call.Method = iface + "." + member
|
||||
call.Args = msg.Body
|
||||
call.Done = ch
|
||||
conn.calls.track(msg.serial, call)
|
||||
conn.sendMessageAndIfClosed(msg, func() {
|
||||
call.Err = ErrClosed
|
||||
call.Done <- call
|
||||
})
|
||||
} else {
|
||||
call = &Call{Err: nil}
|
||||
conn.sendMessageAndIfClosed(msg, func() {
|
||||
call = &Call{Err: ErrClosed}
|
||||
})
|
||||
}
|
||||
return call
|
||||
}
|
||||
|
||||
// sendError creates an error message corresponding to the parameters and sends
|
||||
// it to conn.out.
|
||||
func (conn *Conn) sendError(err error, dest string, serial uint32) {
|
||||
var e *Error
|
||||
switch em := err.(type) {
|
||||
case Error:
|
||||
e = &em
|
||||
case *Error:
|
||||
e = em
|
||||
case DBusError:
|
||||
name, body := em.DBusError()
|
||||
e = NewError(name, body)
|
||||
default:
|
||||
e = MakeFailedError(err)
|
||||
}
|
||||
msg := new(Message)
|
||||
msg.Type = TypeError
|
||||
msg.serial = conn.getSerial()
|
||||
msg.Headers = make(map[HeaderField]Variant)
|
||||
if dest != "" {
|
||||
msg.Headers[FieldDestination] = MakeVariant(dest)
|
||||
}
|
||||
msg.Headers[FieldErrorName] = MakeVariant(e.Name)
|
||||
msg.Headers[FieldReplySerial] = MakeVariant(serial)
|
||||
msg.Body = e.Body
|
||||
if len(e.Body) > 0 {
|
||||
msg.Headers[FieldSignature] = MakeVariant(SignatureOf(e.Body...))
|
||||
}
|
||||
conn.sendMessage(msg)
|
||||
}
|
||||
|
||||
// sendReply creates a method reply message corresponding to the parameters and
|
||||
// sends it to conn.out.
|
||||
func (conn *Conn) sendReply(dest string, serial uint32, values ...interface{}) {
|
||||
msg := new(Message)
|
||||
msg.Type = TypeMethodReply
|
||||
msg.serial = conn.getSerial()
|
||||
msg.Headers = make(map[HeaderField]Variant)
|
||||
if dest != "" {
|
||||
msg.Headers[FieldDestination] = MakeVariant(dest)
|
||||
}
|
||||
msg.Headers[FieldReplySerial] = MakeVariant(serial)
|
||||
msg.Body = values
|
||||
if len(values) > 0 {
|
||||
msg.Headers[FieldSignature] = MakeVariant(SignatureOf(values...))
|
||||
}
|
||||
conn.sendMessage(msg)
|
||||
}
|
||||
|
||||
func (conn *Conn) defaultSignalAction(fn func(h *defaultSignalHandler, ch chan<- *Signal), ch chan<- *Signal) {
|
||||
if !isDefaultSignalHandler(conn.signalHandler) {
|
||||
return
|
||||
}
|
||||
handler := conn.signalHandler.(*defaultSignalHandler)
|
||||
fn(handler, ch)
|
||||
}
|
||||
|
||||
// Signal registers the given channel to be passed all received signal messages.
|
||||
// The caller has to make sure that ch is sufficiently buffered; if a message
|
||||
// arrives when a write to c is not possible, it is discarded.
|
||||
//
|
||||
// Multiple of these channels can be registered at the same time.
|
||||
//
|
||||
// These channels are "overwritten" by Eavesdrop; i.e., if there currently is a
|
||||
// channel for eavesdropped messages, this channel receives all signals, and
|
||||
// none of the channels passed to Signal will receive any signals.
|
||||
func (conn *Conn) Signal(ch chan<- *Signal) {
|
||||
conn.defaultSignalAction((*defaultSignalHandler).addSignal, ch)
|
||||
}
|
||||
|
||||
// RemoveSignal removes the given channel from the list of the registered channels.
|
||||
func (conn *Conn) RemoveSignal(ch chan<- *Signal) {
|
||||
conn.defaultSignalAction((*defaultSignalHandler).removeSignal, ch)
|
||||
}
|
||||
|
||||
// SupportsUnixFDs returns whether the underlying transport supports passing of
|
||||
// unix file descriptors. If this is false, method calls containing unix file
|
||||
// descriptors will return an error and emitted signals containing them will
|
||||
// not be sent.
|
||||
func (conn *Conn) SupportsUnixFDs() bool {
|
||||
return conn.unixFD
|
||||
}
|
||||
|
||||
// Error represents a D-Bus message of type Error.
|
||||
type Error struct {
|
||||
Name string
|
||||
Body []interface{}
|
||||
}
|
||||
|
||||
func NewError(name string, body []interface{}) *Error {
|
||||
return &Error{name, body}
|
||||
}
|
||||
|
||||
func (e Error) Error() string {
|
||||
if len(e.Body) >= 1 {
|
||||
s, ok := e.Body[0].(string)
|
||||
if ok {
|
||||
return s
|
||||
}
|
||||
}
|
||||
return e.Name
|
||||
}
|
||||
|
||||
// Signal represents a D-Bus message of type Signal. The name member is given in
|
||||
// "interface.member" notation, e.g. org.freedesktop.D-Bus.NameLost.
|
||||
type Signal struct {
|
||||
Sender string
|
||||
Path ObjectPath
|
||||
Name string
|
||||
Body []interface{}
|
||||
}
|
||||
|
||||
// transport is a D-Bus transport.
|
||||
type transport interface {
|
||||
// Read and Write raw data (for example, for the authentication protocol).
|
||||
io.ReadWriteCloser
|
||||
|
||||
// Send the initial null byte used for the EXTERNAL mechanism.
|
||||
SendNullByte() error
|
||||
|
||||
// Returns whether this transport supports passing Unix FDs.
|
||||
SupportsUnixFDs() bool
|
||||
|
||||
// Signal the transport that Unix FD passing is enabled for this connection.
|
||||
EnableUnixFDs()
|
||||
|
||||
// Read / send a message, handling things like Unix FDs.
|
||||
ReadMessage() (*Message, error)
|
||||
SendMessage(*Message) error
|
||||
}
|
||||
|
||||
var (
|
||||
transports = make(map[string]func(string) (transport, error))
|
||||
)
|
||||
|
||||
func getTransport(address string) (transport, error) {
|
||||
var err error
|
||||
var t transport
|
||||
|
||||
addresses := strings.Split(address, ";")
|
||||
for _, v := range addresses {
|
||||
i := strings.IndexRune(v, ':')
|
||||
if i == -1 {
|
||||
err = errors.New("dbus: invalid bus address (no transport)")
|
||||
continue
|
||||
}
|
||||
f := transports[v[:i]]
|
||||
if f == nil {
|
||||
err = errors.New("dbus: invalid bus address (invalid or unsupported transport)")
|
||||
continue
|
||||
}
|
||||
t, err = f(v[i+1:])
|
||||
if err == nil {
|
||||
return t, nil
|
||||
}
|
||||
}
|
||||
return nil, err
|
||||
}
|
||||
|
||||
// dereferenceAll returns a slice that, assuming that vs is a slice of pointers
|
||||
// of arbitrary types, containes the values that are obtained from dereferencing
|
||||
// all elements in vs.
|
||||
func dereferenceAll(vs []interface{}) []interface{} {
|
||||
for i := range vs {
|
||||
v := reflect.ValueOf(vs[i])
|
||||
v = v.Elem()
|
||||
vs[i] = v.Interface()
|
||||
}
|
||||
return vs
|
||||
}
|
||||
|
||||
// getKey gets a key from a the list of keys. Returns "" on error / not found...
|
||||
func getKey(s, key string) string {
|
||||
for _, keyEqualsValue := range strings.Split(s, ",") {
|
||||
keyValue := strings.SplitN(keyEqualsValue, "=", 2)
|
||||
if len(keyValue) == 2 && keyValue[0] == key {
|
||||
return keyValue[1]
|
||||
}
|
||||
}
|
||||
return ""
|
||||
}
|
||||
|
||||
type outputHandler struct {
|
||||
conn *Conn
|
||||
sendLck sync.Mutex
|
||||
closed struct {
|
||||
isClosed bool
|
||||
lck sync.RWMutex
|
||||
}
|
||||
}
|
||||
|
||||
func (h *outputHandler) sendAndIfClosed(msg *Message, ifClosed func()) error {
|
||||
h.closed.lck.RLock()
|
||||
defer h.closed.lck.RUnlock()
|
||||
if h.closed.isClosed {
|
||||
ifClosed()
|
||||
return nil
|
||||
}
|
||||
h.sendLck.Lock()
|
||||
defer h.sendLck.Unlock()
|
||||
return h.conn.SendMessage(msg)
|
||||
}
|
||||
|
||||
func (h *outputHandler) close() {
|
||||
h.closed.lck.Lock()
|
||||
defer h.closed.lck.Unlock()
|
||||
h.closed.isClosed = true
|
||||
}
|
||||
|
||||
type serialGenerator struct {
|
||||
lck sync.Mutex
|
||||
nextSerial uint32
|
||||
serialUsed map[uint32]bool
|
||||
}
|
||||
|
||||
func newSerialGenerator() *serialGenerator {
|
||||
return &serialGenerator{
|
||||
serialUsed: map[uint32]bool{0: true},
|
||||
nextSerial: 1,
|
||||
}
|
||||
}
|
||||
|
||||
func (gen *serialGenerator) getSerial() uint32 {
|
||||
gen.lck.Lock()
|
||||
defer gen.lck.Unlock()
|
||||
n := gen.nextSerial
|
||||
for gen.serialUsed[n] {
|
||||
n++
|
||||
}
|
||||
gen.serialUsed[n] = true
|
||||
gen.nextSerial = n + 1
|
||||
return n
|
||||
}
|
||||
|
||||
func (gen *serialGenerator) retireSerial(serial uint32) {
|
||||
gen.lck.Lock()
|
||||
defer gen.lck.Unlock()
|
||||
delete(gen.serialUsed, serial)
|
||||
}
|
||||
|
||||
type nameTracker struct {
|
||||
lck sync.RWMutex
|
||||
unique string
|
||||
names map[string]struct{}
|
||||
}
|
||||
|
||||
func newNameTracker() *nameTracker {
|
||||
return &nameTracker{names: map[string]struct{}{}}
|
||||
}
|
||||
func (tracker *nameTracker) acquireUniqueConnectionName(name string) {
|
||||
tracker.lck.Lock()
|
||||
defer tracker.lck.Unlock()
|
||||
tracker.unique = name
|
||||
}
|
||||
func (tracker *nameTracker) acquireName(name string) {
|
||||
tracker.lck.Lock()
|
||||
defer tracker.lck.Unlock()
|
||||
tracker.names[name] = struct{}{}
|
||||
}
|
||||
func (tracker *nameTracker) loseName(name string) {
|
||||
tracker.lck.Lock()
|
||||
defer tracker.lck.Unlock()
|
||||
delete(tracker.names, name)
|
||||
}
|
||||
|
||||
func (tracker *nameTracker) uniqueNameIsKnown() bool {
|
||||
tracker.lck.RLock()
|
||||
defer tracker.lck.RUnlock()
|
||||
return tracker.unique != ""
|
||||
}
|
||||
func (tracker *nameTracker) isKnownName(name string) bool {
|
||||
tracker.lck.RLock()
|
||||
defer tracker.lck.RUnlock()
|
||||
_, ok := tracker.names[name]
|
||||
return ok || name == tracker.unique
|
||||
}
|
||||
func (tracker *nameTracker) listKnownNames() []string {
|
||||
tracker.lck.RLock()
|
||||
defer tracker.lck.RUnlock()
|
||||
out := make([]string, 0, len(tracker.names)+1)
|
||||
out = append(out, tracker.unique)
|
||||
for k := range tracker.names {
|
||||
out = append(out, k)
|
||||
}
|
||||
return out
|
||||
}
|
||||
|
||||
type callTracker struct {
|
||||
calls map[uint32]*Call
|
||||
lck sync.RWMutex
|
||||
}
|
||||
|
||||
func newCallTracker() *callTracker {
|
||||
return &callTracker{calls: map[uint32]*Call{}}
|
||||
}
|
||||
|
||||
func (tracker *callTracker) track(sn uint32, call *Call) {
|
||||
tracker.lck.Lock()
|
||||
defer tracker.lck.Unlock()
|
||||
tracker.calls[sn] = call
|
||||
}
|
||||
|
||||
func (tracker *callTracker) handleReply(msg *Message) uint32 {
|
||||
serial := msg.Headers[FieldReplySerial].value.(uint32)
|
||||
tracker.lck.RLock()
|
||||
c, ok := tracker.calls[serial]
|
||||
tracker.lck.RUnlock()
|
||||
if !ok {
|
||||
return serial
|
||||
}
|
||||
c.Body = msg.Body
|
||||
c.Done <- c
|
||||
tracker.finalize(serial)
|
||||
return serial
|
||||
}
|
||||
|
||||
func (tracker *callTracker) handleDBusError(msg *Message) uint32 {
|
||||
serial := msg.Headers[FieldReplySerial].value.(uint32)
|
||||
tracker.lck.RLock()
|
||||
c, ok := tracker.calls[serial]
|
||||
tracker.lck.RUnlock()
|
||||
if !ok {
|
||||
return serial
|
||||
}
|
||||
name, _ := msg.Headers[FieldErrorName].value.(string)
|
||||
c.Err = Error{name, msg.Body}
|
||||
c.Done <- c
|
||||
tracker.finalize(serial)
|
||||
return serial
|
||||
}
|
||||
|
||||
func (tracker *callTracker) handleSendError(msg *Message, err error) {
|
||||
if err == nil {
|
||||
return
|
||||
}
|
||||
tracker.lck.RLock()
|
||||
c, ok := tracker.calls[msg.serial]
|
||||
tracker.lck.RUnlock()
|
||||
if !ok {
|
||||
return
|
||||
}
|
||||
c.Err = err
|
||||
c.Done <- c
|
||||
tracker.finalize(msg.serial)
|
||||
}
|
||||
|
||||
func (tracker *callTracker) finalize(sn uint32) {
|
||||
tracker.lck.Lock()
|
||||
defer tracker.lck.Unlock()
|
||||
delete(tracker.calls, sn)
|
||||
}
|
||||
|
||||
func (tracker *callTracker) finalizeAllWithError(err error) {
|
||||
closedCalls := make(map[uint32]*Call)
|
||||
tracker.lck.RLock()
|
||||
for sn, v := range tracker.calls {
|
||||
v.Err = err
|
||||
v.Done <- v
|
||||
closedCalls[sn] = v
|
||||
}
|
||||
tracker.lck.RUnlock()
|
||||
for sn := range closedCalls {
|
||||
tracker.finalize(sn)
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user