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Mostly lock free receive loop

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This commit is contained in:
Jakob Borg 2013-12-30 22:10:54 -05:00
parent fd56123acf
commit 632bcae856
1 changed files with 35 additions and 35 deletions
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70
protocol/protocol.go
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@ -59,9 +59,6 @@ type Connection struct {
lastStatistics Statistics
statisticsLock sync.Mutex
lastReceive time.Time
lastReceiveLock sync.RWMutex
}
var ErrClosed = errors.New("Connection closed")
@ -71,8 +68,10 @@ type asyncResult struct {
err error
}
const pingTimeout = 2 * time.Minute
const pingIdleTime = 5 * time.Minute
const (
pingTimeout = 2 * time.Minute
pingIdleTime = 5 * time.Minute
)
func NewConnection(nodeID string, reader io.Reader, writer io.Writer, receiver Model) *Connection {
flrd := flate.NewReader(reader)
@ -88,7 +87,6 @@ func NewConnection(nodeID string, reader io.Reader, writer io.Writer, receiver M
writer: flwr,
mwriter: &marshalWriter{w: flwr},
awaiting: make(map[int]chan asyncResult),
lastReceive: time.Now(),
ID: nodeID,
lastStatistics: Statistics{At: time.Now()},
}
@ -102,7 +100,6 @@ func NewConnection(nodeID string, reader io.Reader, writer io.Writer, receiver M
// Index writes the list of file information to the connected peer node
func (c *Connection) Index(idx []FileInfo) {
c.Lock()
var msgType int
if c.indexSent == nil {
// This is the first time we send an index.
@ -234,26 +231,24 @@ func (c *Connection) isClosed() bool {
}
func (c *Connection) readerLoop() {
for !c.isClosed() {
loop:
for {
hdr := c.mreader.readHeader()
if c.mreader.err != nil {
c.Close(c.mreader.err)
break
break loop
}
if hdr.version != 0 {
c.Close(fmt.Errorf("Protocol error: %s: unknown message version %#x", c.ID, hdr.version))
break
break loop
}
c.lastReceiveLock.Lock()
c.lastReceive = time.Now()
c.lastReceiveLock.Unlock()
switch hdr.msgType {
case messageTypeIndex:
files := c.mreader.readIndex()
if c.mreader.err != nil {
c.Close(c.mreader.err)
break loop
} else {
c.receiver.Index(c.ID, files)
}
@ -262,18 +257,25 @@ func (c *Connection) readerLoop() {
files := c.mreader.readIndex()
if c.mreader.err != nil {
c.Close(c.mreader.err)
break loop
} else {
c.receiver.IndexUpdate(c.ID, files)
}
case messageTypeRequest:
c.processRequest(hdr.msgID)
req := c.mreader.readRequest()
if c.mreader.err != nil {
c.Close(c.mreader.err)
break loop
}
go c.processRequest(hdr.msgID, req)
case messageTypeResponse:
data := c.mreader.readResponse()
if c.mreader.err != nil {
c.Close(c.mreader.err)
break loop
} else {
c.Lock()
rc, ok := c.awaiting[hdr.msgID]
@ -293,8 +295,10 @@ func (c *Connection) readerLoop() {
c.Unlock()
if err != nil {
c.Close(err)
break loop
} else if c.mwriter.err != nil {
c.Close(c.mwriter.err)
break loop
}
case messageTypePong:
@ -313,35 +317,31 @@ func (c *Connection) readerLoop() {
default:
c.Close(fmt.Errorf("Protocol error: %s: unknown message type %#x", c.ID, hdr.msgType))
break loop
}
}
}
func (c *Connection) processRequest(msgID int) {
req := c.mreader.readRequest()
if c.mreader.err != nil {
c.Close(c.mreader.err)
} else {
go func() {
data, _ := c.receiver.Request(c.ID, req.name, req.offset, req.size, req.hash)
c.Lock()
c.mwriter.writeUint32(encodeHeader(header{0, msgID, messageTypeResponse}))
c.mwriter.writeResponse(data)
err := c.flush()
c.Unlock()
buffers.Put(data)
if err != nil {
c.Close(err)
} else if c.mwriter.err != nil {
c.Close(c.mwriter.err)
}
}()
func (c *Connection) processRequest(msgID int, req request) {
data, _ := c.receiver.Request(c.ID, req.name, req.offset, req.size, req.hash)
c.Lock()
c.mwriter.writeUint32(encodeHeader(header{0, msgID, messageTypeResponse}))
c.mwriter.writeResponse(data)
err := c.flush()
c.Unlock()
buffers.Put(data)
if err != nil {
c.Close(err)
} else if c.mwriter.err != nil {
c.Close(c.mwriter.err)
}
}
func (c *Connection) pingerLoop() {
var rc = make(chan bool, 1)
for !c.isClosed() {
for {
time.Sleep(pingIdleTime / 2)
go func() {
rc <- c.Ping()