implement a map for outgoing streams

streams_map_outgoing_generic.go

@@ -0,0 +1,73 @@
+package quic
+
+import (
+	"fmt"
+	"sync"
+
+	"github.com/cheekybits/genny/generic"
+	"github.com/lucas-clemente/quic-go/internal/protocol"
+	"github.com/lucas-clemente/quic-go/qerr"
+)
+
+type item generic.Type
+
+//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
+
+	streams map[protocol.StreamID]item
+
+	nextStream protocol.StreamID
+	newStream  func(protocol.StreamID) item
+
+	closeErr error
+}
+
+func newOutgoingItemsMap(nextStream protocol.StreamID, newStream func(protocol.StreamID) item) *outgoingItemsMap {
+	return &outgoingItemsMap{
+		streams:    make(map[protocol.StreamID]item),
+		nextStream: nextStream,
+		newStream:  newStream,
+	}
+}
+
+func (m *outgoingItemsMap) OpenStream() (item, error) {
+	m.mutex.Lock()
+	defer m.mutex.Unlock()
+
+	if m.closeErr != nil {
+		return nil, m.closeErr
+	}
+	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) {
+	if id >= m.nextStream {
+		return nil, qerr.Error(qerr.InvalidStreamID, fmt.Sprintf("peer attempted to open stream %d", id))
+	}
+	m.mutex.RLock()
+	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) CloseWithError(err error) {
+	m.mutex.Lock()
+	m.closeErr = err
+	m.mutex.Unlock()
+}