mirror of
https://github.com/strukturag/nextcloud-spreed-signaling
synced 2024-05-02 22:03:09 +02:00
Simplify close code of client to make clear when it gets closed internally.
This commit is contained in:
parent
b17eb584b4
commit
758899b745
78
client.go
78
client.go
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@ -105,10 +105,10 @@ type Client struct {
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mu sync.Mutex
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closeChan chan bool
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messagesDone chan bool
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messageChan chan *bytes.Buffer
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messageProcessing uint32
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closeChan chan struct{}
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closeOnce sync.Once
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messagesDone chan struct{}
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messageChan chan *bytes.Buffer
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OnLookupCountry func(*Client) string
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OnClosed func(*Client)
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@ -127,31 +127,23 @@ func NewClient(conn *websocket.Conn, remoteAddress string, agent string) (*Clien
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}
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client := &Client{
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conn: conn,
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addr: remoteAddress,
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agent: agent,
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logRTT: true,
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closeChan: make(chan bool, 1),
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messageChan: make(chan *bytes.Buffer, 16),
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messagesDone: make(chan bool, 1),
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OnLookupCountry: func(client *Client) string { return unknownCountry },
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OnClosed: func(client *Client) {},
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OnMessageReceived: func(client *Client, data []byte) {},
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OnRTTReceived: func(client *Client, rtt time.Duration) {},
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}
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client.SetConn(conn, remoteAddress)
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return client, nil
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}
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func (c *Client) SetConn(conn *websocket.Conn, remoteAddress string) {
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c.conn = conn
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c.addr = remoteAddress
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c.closeChan = make(chan bool, 1)
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c.closeChan = make(chan struct{})
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c.messageChan = make(chan *bytes.Buffer, 16)
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c.messagesDone = make(chan struct{})
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c.OnLookupCountry = func(client *Client) string { return unknownCountry }
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c.OnClosed = func(client *Client) {}
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c.OnMessageReceived = func(client *Client, data []byte) {}
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c.OnRTTReceived = func(c *Client, d time.Duration) {}
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}
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func (c *Client) IsConnected() bool {
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@ -188,38 +180,36 @@ func (c *Client) Country() string {
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}
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func (c *Client) Close() {
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if !atomic.CompareAndSwapUint32(&c.closed, 0, 1) {
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if atomic.LoadUint32(&c.closed) >= 2 {
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// Prevent reentrant call in case this was the second closing
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// step. Would otherwise deadlock in the "Once.Do" call path
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// through "Hub.processUnregister" (which calls "Close" again).
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return
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}
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c.mu.Lock()
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if c.conn != nil {
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c.conn.WriteMessage(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseNormalClosure, "")) // nolint
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}
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c.mu.Unlock()
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if atomic.LoadUint32(&c.messageProcessing) == 1 {
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// Defer closing
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atomic.StoreUint32(&c.closed, 2)
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return
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}
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c.doClose()
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c.closeOnce.Do(func() {
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c.doClose()
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})
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}
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func (c *Client) doClose() {
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c.closeChan <- true
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<-c.messagesDone
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closed := atomic.AddUint32(&c.closed, 1)
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if closed == 1 {
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c.mu.Lock()
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defer c.mu.Unlock()
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if c.conn != nil {
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c.conn.WriteMessage(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseNormalClosure, "")) // nolint
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c.conn.Close()
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c.conn = nil
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}
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} else if closed == 2 {
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// Both the read pump and message processing must be finished before closing.
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close(c.closeChan)
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<-c.messagesDone
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c.OnClosed(c)
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c.SetSession(nil)
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c.mu.Lock()
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if c.conn != nil {
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c.conn.Close()
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c.conn = nil
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c.OnClosed(c)
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c.SetSession(nil)
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}
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c.mu.Unlock()
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}
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func (c *Client) SendError(e *Error) bool {
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@ -341,7 +331,6 @@ func (c *Client) ReadPump() {
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}
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func (c *Client) processMessages() {
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atomic.StoreUint32(&c.messageProcessing, 1)
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for {
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buffer := <-c.messageChan
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if buffer == nil {
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@ -351,12 +340,9 @@ func (c *Client) processMessages() {
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c.OnMessageReceived(c, buffer.Bytes())
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bufferPool.Put(buffer)
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}
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atomic.StoreUint32(&c.messageProcessing, 0)
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c.messagesDone <- true
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if atomic.LoadUint32(&c.closed) == 2 {
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c.doClose()
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}
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close(c.messagesDone)
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c.doClose()
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}
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func (c *Client) writeInternal(message json.Marshaler) bool {
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