// Recv receives a message. For AF_SP_RAW messages the header data will
// be included at he start of the returned byte slice (otherwise it will
// be stripped). At this time no flags are supported.
func (s *Socket) Recv(flags int) ([]byte, error) {
var b []byte
var m *mangos.Message
var err error
if flags != 0 {
return nil, errNoFlag
}
// Legacy nanomsg uses the opposite semantic for negative and
// zero values than mangos. A bit unfortunate.
switch {
case s.rto > 0:
s.sock.SetOption(mangos.OptionRecvDeadline, s.rto)
case s.rto == 0:
s.sock.SetOption(mangos.OptionRecvDeadline, -1)
case s.rto < 0:
s.sock.SetOption(mangos.OptionRecvDeadline, 0)
}
if m, err = s.sock.RecvMsg(); err != nil {
return nil, err
}
if s.dom == AF_SP_RAW {
b = make([]byte, 0, len(m.Body)+len(m.Header))
b = append(b, m.Header...)
b = append(b, m.Body...)
} else {
b = make([]byte, 0, len(m.Body))
b = append(b, m.Body...)
}
m.Free()
return b, nil
}
func (x *bus) broadcast(m *mangos.Message, sender uint32) {
x.Lock()
for id, pe := range x.eps {
if m != nil {
if sender == id {
continue
}
m = m.Dup()
}
select {
case pe.q <- m:
default:
// No room on outbound queue, drop it.
// Note that if we are passing on a linger/shutdown
// notification and we can't deliver due to queue
// full, it means we will wind up waiting the full
// linger time in the lower sender. Its correct, if
// suboptimal, behavior.
if m != nil {
m.Free()
}
}
}
x.Unlock()
}
func (w *wsPipe) Send(m *mangos.Message) error {
var buf []byte
if len(m.Header) > 0 {
buf = make([]byte, 0, len(m.Header)+len(m.Body))
buf = append(buf, m.Header...)
buf = append(buf, m.Body...)
} else {
buf = m.Body
}
if err := websocket.Message.Send(w.ws, buf); err != nil {
return err
}
m.Free()
return nil
}
func (x *surveyor) sender() {
defer x.w.Done()
sq := x.sock.SendChannel()
cq := x.sock.CloseChannel()
for {
var m *mangos.Message
select {
case m = <-sq:
case <-cq:
return
}
x.Lock()
for _, pe := range x.peers {
m := m.Dup()
select {
case pe.q <- m:
default:
m.Free()
}
}
x.Unlock()
}
}
func (x *star) broadcast(m *mangos.Message, sender *starEp) {
x.Lock()
for _, pe := range x.eps {
if sender == pe {
continue
}
if m != nil {
m = m.Dup()
}
select {
case pe.q <- m:
default:
// No room on outbound queue, drop it.
if m != nil {
m.Free()
}
}
}
x.Unlock()
// Grab a local copy and send it up if we aren't originator
if m != nil {
if sender != nil {
select {
case x.sock.RecvChannel() <- m:
case <-x.sock.CloseChannel():
m.Free()
return
default:
// No room, so we just drop it.
m.Free()
}
} else {
// Not sending it up, so we need to release it.
m.Free()
}
}
}
func (r *rep) sender() {
defer r.w.Done()
sq := r.sock.SendChannel()
cq := r.sock.CloseChannel()
for {
var m *mangos.Message
select {
case m = <-sq:
case <-cq:
return
}
// Lop off the 32-bit peer/pipe ID. If absent, drop.
if len(m.Header) < 4 {
m.Free()
continue
}
id := binary.BigEndian.Uint32(m.Header)
m.Header = m.Header[4:]
r.Lock()
pe := r.eps[id]
r.Unlock()
if pe == nil {
m.Free()
continue
}
select {
case pe.q <- m:
default:
// If our queue is full, we have no choice but to
// throw it on the floor. This shoudn't happen,
// since each partner should be running synchronously.
// Devices are a different situation, and this could
// lead to lossy behavior there. Initiators will
// resend if this happens. Devices need to have deep
// enough queues and be fast enough to avoid this.
m.Free()
}
}
}
func (x *resp) sender() {
// This is pretty easy because we have only one peer at a time.
// If the peer goes away, we'll just drop the message on the floor.
defer x.w.Done()
cq := x.sock.CloseChannel()
sq := x.sock.SendChannel()
for {
var m *mangos.Message
select {
case m = <-sq:
case <-cq:
return
}
// Lop off the 32-bit peer/pipe ID. If absent, drop.
if len(m.Header) < 4 {
m.Free()
continue
}
id := binary.BigEndian.Uint32(m.Header)
m.Header = m.Header[4:]
x.Lock()
peer := x.peers[id]
x.Unlock()
if peer == nil {
m.Free()
continue
}
// Put it on the outbound queue
select {
case peer.q <- m:
default:
// Backpressure, drop it.
m.Free()
}
}
}
func benchmarkPair(t *testing.B, url string, size int) {
if strings.HasPrefix(url, "ipc://") && runtime.GOOS == "windows" {
t.Skip("IPC not supported on Windows")
return
}
srvopts := make(map[string]interface{})
cliopts := make(map[string]interface{})
if strings.HasPrefix(url, "wss://") || strings.HasPrefix(url, "tls+tcp://") {
srvopts[mangos.OptionTLSConfig] = srvCfg
cliopts[mangos.OptionTLSConfig] = cliCfg
}
finish := make(chan struct{})
ready := make(chan struct{})
srvsock, err := pair.NewSocket()
if err != nil || srvsock == nil {
t.Errorf("Failed creating server socket: %v", err)
return
}
all.AddTransports(srvsock)
defer srvsock.Close()
clisock, err := pair.NewSocket()
if err != nil || clisock == nil {
t.Errorf("Failed creating client socket: %v", err)
return
}
all.AddTransports(clisock)
defer clisock.Close()
go func() {
var err error
var m *mangos.Message
if err = srvsock.ListenOptions(url, srvopts); err != nil {
t.Errorf("Server listen failed: %v", err)
return
}
close(ready)
for i := 0; i < t.N; i++ {
if m, err = srvsock.RecvMsg(); err != nil {
t.Errorf("Error receiving %d: %v", i, err)
return
}
m.Free()
}
close(finish)
}()
<-ready
if err = clisock.DialOptions(url, cliopts); err != nil {
t.Errorf("Client dial failed: %v", err)
return
}
time.Sleep(700 * time.Millisecond)
t.ResetTimer()
for i := 0; i < t.N; i++ {
msg := mangos.NewMessage(size)
if err = clisock.SendMsg(msg); err != nil {
t.Errorf("Client send failed: %v", err)
return
}
}
<-finish
t.StopTimer()
if size > 128 {
t.SetBytes(int64(size))
}
}