gui/main-window: exit program when config not writable

Note, it opens the config in read-write mode to check if it's
writable. This might present a race condition when config is
saved.

However, we're expecting all config saving to be done in the
user interface thread. Add a check for it however.

1 files changed, 6 insertions, 0 deletions

diff --git a/options/bundle.cpp b/options/bundle.cpp
index e4c0ffbd..482e46d1 100644
--- a/options/bundle.cpp
+++ b/options/bundle.cpp
@@ -1,6 +1,9 @@
 #include "bundle.hpp"
 #include "value.hpp"
 
+#include <QThread>
+#include <QApplication>
+
 using options::base_value;
 
 namespace options
@@ -58,6 +61,9 @@ bool bundle::contains(const QString &name) const
 
 void bundle::save_deferred(QSettings& s)
 {
+    if (QThread::currentThread() != qApp->thread())
+        qCritical() << "group::save - current thread not ui thread";
+
     if (group_name.size() == 0)
         return;