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zeroconf: async startBrowsing

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Asynchronous startBrowsing (quick return), and avoid infinite
retry if daemon starts but stops due to insufficient privilegies.

Change-Id: I2b4ef5b5ad9ab0a581d2ac169eeac3ba73df5376
Reviewed-by: Christian Kandeler <christian.kandeler@nokia.com>
This commit is contained in:
Fawzi Mohamed
2011-10-20 20:47:33 +02:00
parent cacae3fea9
commit 63ff12e051
3 changed files with 34 additions and 14 deletions
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43
src/libs/zeroconf/servicebrowser.cpp
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@@ -292,9 +292,9 @@ QDebug operator<<(QDebug dbg, const Service &service)
*/
/// starts the browsing, return true if successfull
bool ServiceBrowser::startBrowsing(qint32 interfaceIndex)
void ServiceBrowser::startBrowsing(qint32 interfaceIndex)
{
return d->startBrowsing(interfaceIndex);
d->startBrowsing(interfaceIndex);
}
/// create a new brower for the given service type
@@ -1077,12 +1077,20 @@ void ServiceBrowserPrivate::browseReply(DNSServiceFlags flag
maybeUpdateLists();
}
bool ServiceBrowserPrivate::startBrowsing(quint32 interfaceIndex)
void ServiceBrowserPrivate::startBrowsing(quint32 interfaceIndex)
{
if (failed || browsing) return false;
this->interfaceIndex = interfaceIndex;
if (failed || browsing)
return;
if (mainConnection.isNull())
mainConnection = MainConnectionPtr(new MainConnection());
mainConnection->addBrowser(this);
}
bool ServiceBrowserPrivate::internalStartBrowsing()
{
if (failed || browsing)
return false;
DNSServiceErrorType err;
err = mainConnection->lib->browse(mainRef(), &serviceConnection, interfaceIndex,
serviceType.toUtf8().constData(), ((domain.isEmpty()) ? 0 : (domain.toUtf8().constData())), this);
@@ -1211,15 +1219,19 @@ void MainConnection::waitStartup()
void MainConnection::addBrowser(ServiceBrowserPrivate *browser)
{
waitStartup();
int actualStatus;
QStringList errs;
bool didFail;
{
QMutexLocker l(lock());
actualStatus = m_status;
m_browsers.append(browser);
errs=m_errors;
didFail=m_failed;
}
if (actualStatus == Running) {
browser->internalStartBrowsing();
}
if (didFail || !errs.isEmpty())
browser->hadError(errs, didFail);
}
@@ -1301,19 +1313,26 @@ void MainConnection::createConnection()
if (m_nErrs > 10 || !lib->isOk())
abortLib();
} else {
increaseStatusTo(Running);
// multithreading issues if we support multiple cycles of createConnection/destroyConnection
for (int i = m_browsers.count(); i-- != 0; ){
ServiceBrowserPrivate *bAtt=m_browsers[i];
if (bAtt && !bAtt->browsing)
bAtt->startBrowsing(bAtt->interfaceIndex);
QList<ServiceBrowserPrivate *> waitingBrowsers;
{
QMutexLocker(lock());
waitingBrowsers = m_browsers;
increaseStatusTo(Running);
}
for (int i = waitingBrowsers.count(); i-- != 0; ){
ServiceBrowserPrivate *actualBrowser = waitingBrowsers[i];
if (actualBrowser && !actualBrowser->browsing)
actualBrowser->internalStartBrowsing();
}
break;
}
} else if (err == kDNSServiceErr_ServiceNotRunning) {
appendError(QStringList(tr("MainConnection using lib %1 failed because no daemon is running")
.arg(lib->name())),false);
if (lib->tryStartDaemon()) {
if (m_nErrs > 5 || !lib->isOk()) {
abortLib();
} else if (lib->tryStartDaemon()) {
++m_nErrs;
appendError(QStringList(tr("MainConnection using lib %1 daemon starting seem successful, continuing")
.arg(lib->name())),false);
} else {