added mutex to logoutput -> no crash ("realloc(): invalid next size") if filters are changed

python/tmc_parser.py

@@ -211,7 +211,7 @@ class tmc_parser(gr.sync_block):
                 else:
                     if self.log or True:#not seen yet -> always print
                         print("alert plus on station %s (%s)"%(PI,psn))#(not seen yet)
-            
+        #end of handle_msg
     def getqtwidget(self):
         return self.qtwidget
     def decode_chars(self,charstring):
@@ -256,6 +256,7 @@ class tmc_parser(gr.sync_block):
         return return_string
 class tmc_parser_Widget(QtGui.QWidget):
     def print_tmc_msg(self,tmc_msg):
+        self.logMutex.acquire(1)
         sb=self.logOutput.verticalScrollBar()
         oldmax=sb.maximum()
         auto_scroll= abs(oldmax-sb.value())<60#auto_scroll if scrollbar was at max
@@ -271,20 +272,26 @@ class tmc_parser_Widget(QtGui.QWidget):
             sb=self.logOutput.verticalScrollBar()
             new_max=sb.maximum()
             sb.setValue(new_max)
+           # code.interact(local=locals())
             #print("scrolling %i %i %r"%(oldmax,new_max,sb.value()))
         #code.interact(local=locals())
+        self.logMutex.release(1)
     def updateui(self):
         print("updating ui")
     def filterChanged(self):
+        self.logMutex.acquire(1)
+        self.parser.isDone=False
         ef=unicode(self.event_filter.text().toUtf8(), encoding="UTF-8").lower()
         lf=unicode(self.location_filter.text().toUtf8(), encoding="UTF-8").lower()
         self.logOutput.clear()
         filters=[{"type":"location", "str":lf},{"type":"event", "str":ef}]
         self.logOutput.append(Qt.QString.fromUtf8(self.parser.tmc_messages.getLogString(filters)))
         print("filter changed")
+        self.logMutex.release(1)
     def __init__(self, parser,maxheight):
         QtGui.QWidget.__init__(self)
         layout = Qt.QVBoxLayout()
+        self.logMutex=QtCore.QSemaphore(1)
         self.setLayout(layout)
         self.parser=parser
         self.tmc_message_label=QtGui.QLabel("TMC messages:")
@@ -310,4 +317,3 @@ class tmc_parser_Widget(QtGui.QWidget):
         font.setFamily("Courier")
         font.setPointSize(10)
         layout.addWidget(self.logOutput)
-        self.clip = QtGui.QApplication.clipboard()