Prevent datacollector from running when operating on files

This stuff was racy from the beginning. It could happen that the model
got reset after we fetched the selected indexes. Add a mutex and lock it
before operating on the file view. Hopefully this will many, if not all
random crashes.

1 files changed, 3 insertions, 1 deletions

diff --git a/smdirwatcher.h b/smdirwatcher.h
index 77d0d97..dcfc714 100644
--- a/smdirwatcher.h
+++ b/smdirwatcher.h
@@ -1,4 +1,4 @@
-    /*
+/*
   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; either version
@@ -54,6 +54,7 @@ class SmDataColletor : public QThread {
     public:
         explicit SmDataColletor(const int numFields, QObject *parent = 0);
         void init(QSemaphore *set, QSemaphore *get, QQueue<QPair<QString, SmDirWatcher::DWEvent> > *data);
+        QMutex &hold() { return mHoldMx; }
 
     public slots:
         void setCheckForPresent(bool present);
@@ -77,6 +78,7 @@ class SmDataColletor : public QThread {
         bool mCheckForPresent;
         bool mCancel;
         QMutex mCheckForPresentMx;
+        QMutex mHoldMx;
         QSqlQuery *mPicPresentQ;
         QSqlQuery *mMovPresentQ;
 };