use go 1.12

Signed-off-by: hongming <talonwan@yunify.com>

vendor/github.com/lucas-clemente/quic-go/streams_map_outgoing_generic.go

@@ -0,0 +1,124 @@
+package quic
+
+import (
+	"fmt"
+	"sync"
+
+	"github.com/lucas-clemente/quic-go/internal/protocol"
+	"github.com/lucas-clemente/quic-go/internal/wire"
+	"github.com/lucas-clemente/quic-go/qerr"
+)
+
+//go:generate genny -in $GOFILE -out streams_map_outgoing_bidi.go gen "item=streamI Item=BidiStream"
+//go:generate genny -in $GOFILE -out streams_map_outgoing_uni.go gen "item=sendStreamI Item=UniStream"
+type outgoingItemsMap struct {
+	mutex sync.RWMutex
+	cond  sync.Cond
+
+	streams map[protocol.StreamID]item
+
+	nextStream     protocol.StreamID // stream ID of the stream returned by OpenStream(Sync)
+	maxStream      protocol.StreamID // the maximum stream ID we're allowed to open
+	highestBlocked protocol.StreamID // the highest stream ID that we queued a STREAM_ID_BLOCKED frame for
+
+	newStream            func(protocol.StreamID) item
+	queueStreamIDBlocked func(*wire.StreamIDBlockedFrame)
+
+	closeErr error
+}
+
+func newOutgoingItemsMap(
+	nextStream protocol.StreamID,
+	newStream func(protocol.StreamID) item,
+	queueControlFrame func(wire.Frame),
+) *outgoingItemsMap {
+	m := &outgoingItemsMap{
+		streams:              make(map[protocol.StreamID]item),
+		nextStream:           nextStream,
+		newStream:            newStream,
+		queueStreamIDBlocked: func(f *wire.StreamIDBlockedFrame) { queueControlFrame(f) },
+	}
+	m.cond.L = &m.mutex
+	return m
+}
+
+func (m *outgoingItemsMap) OpenStream() (item, error) {
+	m.mutex.Lock()
+	defer m.mutex.Unlock()
+
+	return m.openStreamImpl()
+}
+
+func (m *outgoingItemsMap) OpenStreamSync() (item, error) {
+	m.mutex.Lock()
+	defer m.mutex.Unlock()
+
+	for {
+		str, err := m.openStreamImpl()
+		if err == nil {
+			return str, err
+		}
+		if err != nil && err != qerr.TooManyOpenStreams {
+			return nil, err
+		}
+		m.cond.Wait()
+	}
+}
+
+func (m *outgoingItemsMap) openStreamImpl() (item, error) {
+	if m.closeErr != nil {
+		return nil, m.closeErr
+	}
+	if m.nextStream > m.maxStream {
+		if m.maxStream == 0 || m.highestBlocked < m.maxStream {
+			m.queueStreamIDBlocked(&wire.StreamIDBlockedFrame{StreamID: m.maxStream})
+			m.highestBlocked = m.maxStream
+		}
+		return nil, qerr.TooManyOpenStreams
+	}
+	s := m.newStream(m.nextStream)
+	m.streams[m.nextStream] = s
+	m.nextStream += 4
+	return s, nil
+}
+
+func (m *outgoingItemsMap) GetStream(id protocol.StreamID) (item, error) {
+	m.mutex.RLock()
+	if id >= m.nextStream {
+		m.mutex.RUnlock()
+		return nil, qerr.Error(qerr.InvalidStreamID, fmt.Sprintf("peer attempted to open stream %d", id))
+	}
+	s := m.streams[id]
+	m.mutex.RUnlock()
+	return s, nil
+}
+
+func (m *outgoingItemsMap) DeleteStream(id protocol.StreamID) error {
+	m.mutex.Lock()
+	defer m.mutex.Unlock()
+
+	if _, ok := m.streams[id]; !ok {
+		return fmt.Errorf("Tried to delete unknown stream %d", id)
+	}
+	delete(m.streams, id)
+	return nil
+}
+
+func (m *outgoingItemsMap) SetMaxStream(id protocol.StreamID) {
+	m.mutex.Lock()
+	if id > m.maxStream {
+		m.maxStream = id
+		m.cond.Broadcast()
+	}
+	m.mutex.Unlock()
+}
+
+func (m *outgoingItemsMap) CloseWithError(err error) {
+	m.mutex.Lock()
+	m.closeErr = err
+	for _, str := range m.streams {
+		str.closeForShutdown(err)
+	}
+	m.cond.Broadcast()
+	m.mutex.Unlock()
+}