zeroconf: improve startup of mdnssd

give enough startup time, while still quickly bailing out when quitting

Change-Id: I628621099e9ead4defc4613615ccb5e8303ff2df
Reviewed-by: Christian Kandeler <christian.kandeler@nokia.com>

src/libs/zeroconf/embed/dnssd_clientstub.c

@@ -35,7 +35,9 @@
 
 #include "dnssd_ipc.h"
 
-namespace ZeroConf { namespace embeddedLib {
+namespace ZeroConf {
+extern int gQuickStop;
+namespace embeddedLib {
 #include "../dns_sd_funct.h"
 static int gDaemonErr = kDNSServiceErr_NoError;
         }}
@@ -233,7 +235,7 @@ static int read_all(dnssd_sock_t sd, char *buf, int len)
                 int nVal=select(sd+1, &readFds, &writeFds, &exceptFds, &timeout);
                 if (nVal < 1 || !FD_ISSET(sd, &readFds)) {
                     ++nErr;
-                    if (nErr < 6) // wait max 6s without reading
+                    if (nErr < 100 && ! ZeroConf::gQuickStop) // wait max 100s without reading
                         continue;
                 } else {
                     num_read = recv(sd, buf, len, 0);

src/libs/zeroconf/servicebrowser.cpp

@@ -197,6 +197,8 @@ void ZeroConfLib::setDefaultLib(LibUsage usage, const QString &avahiLibName,
 
 namespace ZeroConf {
 
+int gQuickStop = 0;
+
 // ----------------- ErrorMessage impl -----------------
 /*!
   \class ZeroConf::ErrorMessage
@@ -1597,7 +1599,9 @@ MainConnection::MainConnection():
 
 MainConnection::~MainConnection()
 {
+    gQuickStop = 1;
     stop(true);
+    gQuickStop = 0;
     delete m_thread;
 }