From fab51c4220b84d15d517e698da59cfb05da02729 Mon Sep 17 00:00:00 2001
From: Kai Koehne <kai.koehne@nokia.com>
Date: Mon, 20 Jun 2011 11:52:18 +0200
Subject: QDeclarativeDebug: Fix cases where multiple packets arrive in one go

Make sure no packets get 'lost' when they're arriving in one go through
the TCP/IP socket.

Reviewed-by: Christiaan Janssen
---
 src/declarative/debugger/qpacketprotocol.cpp        | 19 +++++++++++++------
 .../qmltooling/qmldbg_tcp/qtcpserverconnection.cpp  | 21 ++++++++++++++-------
 2 files changed, 27 insertions(+), 13 deletions(-)

diff --git a/src/declarative/debugger/qpacketprotocol.cpp b/src/declarative/debugger/qpacketprotocol.cpp
index 9caaa79..f53d2a3 100644
--- a/src/declarative/debugger/qpacketprotocol.cpp
+++ b/src/declarative/debugger/qpacketprotocol.cpp
@@ -164,12 +164,16 @@ public Q_SLOTS:
 
     void readyToRead()
     {
+        bool gotPackets = false;
         while (true) {
-            // Need to get trailing data
+            // Get size header (if not in progress)
             if (-1 == inProgressSize) {
                 // We need a size header of sizeof(qint32)
-                if (sizeof(qint32) > (uint)dev->bytesAvailable())
-                    return;
+                if (sizeof(qint32) > (uint)dev->bytesAvailable()) {
+                    if (gotPackets)
+                        emit readyRead();
+                    return; // no more data available
+                }
 
                 // Read size header
                 int read = dev->read((char *)&inProgressSize, sizeof(qint32));
@@ -200,9 +204,12 @@ public Q_SLOTS:
                     inProgress.clear();
 
                     waitingForPacket = false;
-                    emit readyRead();
-                } else
-                    return;
+                    gotPackets = true;
+                } else {
+                    if (gotPackets)
+                        emit readyRead();
+                    return; // packet in progress is not yet complete
+                }
             }
         }
     }
diff --git a/src/plugins/qmltooling/qmldbg_tcp/qtcpserverconnection.cpp b/src/plugins/qmltooling/qmldbg_tcp/qtcpserverconnection.cpp
index abc60e1..283f7d4 100644
--- a/src/plugins/qmltooling/qmldbg_tcp/qtcpserverconnection.cpp
+++ b/src/plugins/qmltooling/qmldbg_tcp/qtcpserverconnection.cpp
@@ -125,7 +125,13 @@ void QTcpServerConnection::disconnect()
 bool QTcpServerConnection::waitForMessage()
 {
     Q_D(QTcpServerConnection);
-    return d->protocol->waitForReadyRead(-1);
+    if (d->protocol->packetsAvailable() > 0) {
+        QPacket packet = d->protocol->read();
+        d->debugServer->receiveMessage(packet.data());
+        return true;
+    } else {
+        return d->protocol->waitForReadyRead(-1);
+    }
 }
 
 void QTcpServerConnection::setPort(int port, bool block)
@@ -145,10 +151,11 @@ void QTcpServerConnection::listen()
 
     d->tcpServer = new QTcpServer(this);
     QObject::connect(d->tcpServer, SIGNAL(newConnection()), this, SLOT(newConnection()));
-    if (d->tcpServer->listen(QHostAddress::Any, d->port))
+    if (d->tcpServer->listen(QHostAddress::Any, d->port)) {
         qWarning("QDeclarativeDebugServer: Waiting for connection on port %d...", d->port);
-    else
+    } else {
         qWarning("QDeclarativeDebugServer: Unable to listen on port %d", d->port);
+    }
 }
 
 
@@ -158,10 +165,10 @@ void QTcpServerConnection::readyRead()
     if (!d->protocol)
         return;
 
-    QPacket packet = d->protocol->read();
-
-    QByteArray content = packet.data();
-    d->debugServer->receiveMessage(content);
+    while (d->protocol->packetsAvailable() > 0) {
+        QPacket packet = d->protocol->read();
+        d->debugServer->receiveMessage(packet.data());
+    }
 }
 
 void QTcpServerConnection::newConnection()
-- 
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