diff options
Diffstat (limited to 'vendor/google.golang.org/grpc/internal/transport/controlbuf.go')
-rw-r--r-- | vendor/google.golang.org/grpc/internal/transport/controlbuf.go | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/vendor/google.golang.org/grpc/internal/transport/controlbuf.go b/vendor/google.golang.org/grpc/internal/transport/controlbuf.go index f63a01376..45532f8ae 100644 --- a/vendor/google.golang.org/grpc/internal/transport/controlbuf.go +++ b/vendor/google.golang.org/grpc/internal/transport/controlbuf.go @@ -296,7 +296,7 @@ type controlBuffer struct { // closed and nilled when transportResponseFrames drops below the // threshold. Both fields are protected by mu. transportResponseFrames int - trfChan atomic.Value // *chan struct{} + trfChan atomic.Value // chan struct{} } func newControlBuffer(done <-chan struct{}) *controlBuffer { @@ -310,10 +310,10 @@ func newControlBuffer(done <-chan struct{}) *controlBuffer { // throttle blocks if there are too many incomingSettings/cleanupStreams in the // controlbuf. func (c *controlBuffer) throttle() { - ch, _ := c.trfChan.Load().(*chan struct{}) + ch, _ := c.trfChan.Load().(chan struct{}) if ch != nil { select { - case <-*ch: + case <-ch: case <-c.done: } } @@ -347,8 +347,7 @@ func (c *controlBuffer) executeAndPut(f func(it interface{}) bool, it cbItem) (b if c.transportResponseFrames == maxQueuedTransportResponseFrames { // We are adding the frame that puts us over the threshold; create // a throttling channel. - ch := make(chan struct{}) - c.trfChan.Store(&ch) + c.trfChan.Store(make(chan struct{})) } } c.mu.Unlock() @@ -389,9 +388,9 @@ func (c *controlBuffer) get(block bool) (interface{}, error) { if c.transportResponseFrames == maxQueuedTransportResponseFrames { // We are removing the frame that put us over the // threshold; close and clear the throttling channel. - ch := c.trfChan.Load().(*chan struct{}) - close(*ch) - c.trfChan.Store((*chan struct{})(nil)) + ch := c.trfChan.Load().(chan struct{}) + close(ch) + c.trfChan.Store((chan struct{})(nil)) } c.transportResponseFrames-- } @@ -407,7 +406,6 @@ func (c *controlBuffer) get(block bool) (interface{}, error) { select { case <-c.ch: case <-c.done: - c.finish() return nil, ErrConnClosing } } @@ -432,6 +430,14 @@ func (c *controlBuffer) finish() { hdr.onOrphaned(ErrConnClosing) } } + // In case throttle() is currently in flight, it needs to be unblocked. + // Otherwise, the transport may not close, since the transport is closed by + // the reader encountering the connection error. + ch, _ := c.trfChan.Load().(chan struct{}) + if ch != nil { + close(ch) + } + c.trfChan.Store((chan struct{})(nil)) c.mu.Unlock() } |