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only send BLOCKED frames if there is more data to send

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This commit is contained in:
Marten Seemann
2018-07-30 05:06:11 +07:00
parent fc87fbd354
commit 50397a979c
11 changed files with 83 additions and 139 deletions
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16
internal/flowcontrol/base_flow_controller.go
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@@ -11,8 +11,9 @@ import (
type baseFlowController struct {
// for sending data
bytesSent protocol.ByteCount
sendWindow protocol.ByteCount
bytesSent protocol.ByteCount
sendWindow protocol.ByteCount
lastBlockedAt protocol.ByteCount
// for receiving data
mutex sync.RWMutex
@@ -29,6 +30,17 @@ type baseFlowController struct {
logger utils.Logger
}
// IsNewlyBlocked says if it is newly blocked by flow control.
// For every offset, it only returns true once.
// If it is blocked, the offset is returned.
func (c *baseFlowController) IsNewlyBlocked() (bool, protocol.ByteCount) {
if c.sendWindowSize() != 0 || c.sendWindow == c.lastBlockedAt {
return false, 0
}
c.lastBlockedAt = c.sendWindow
return true, c.sendWindow
}
func (c *baseFlowController) AddBytesSent(n protocol.ByteCount) {
c.bytesSent += n
}