speed up dbus logind interface creation

src/fenrir/fenrir.py

@@ -35,8 +35,8 @@ class fenrir():
         self.shutdown()
 
     def handleProcess(self):
-        #startTime = time.time()      
         eventReceived = self.environment['runtime']['inputManager'].getInputEvent()
+        startTime = time.time()              
         if eventReceived:
             self.prepareCommand()
             if not (self.wasCommand  or self.environment['generalInformation']['tutorialMode']) or  self.environment['runtime']['screenManager'].isSuspendingScreen():
@@ -65,7 +65,7 @@ class fenrir():
             self.environment['runtime']['commandManager'].executeDefaultTrigger('onScreenUpdate')         
         #self.environment['runtime']['outputManager'].brailleText(flush=False)    
         self.handleCommands()
-        #print(time.time()-startTime)       
+        print(time.time()-startTime)       
 
     def prepareCommand(self):
         if self.environment['runtime']['screenManager'].isSuspendingScreen():
@@ -84,7 +84,6 @@ class fenrir():
             
         self.environment['runtime']['commandManager'].queueCommand(command)  
 
-    
     def handleCommands(self): 
         if not self.environment['runtime']['commandManager'].isCommandQueued():
             return

src/fenrir/inputDriver/evdevDriver.py

@@ -36,16 +36,15 @@ class driver():
         self.getInputDevices()            
 
     def shutdown(self):
-        pass
-    def getInputEvent(self):
         if not self._initialized:
-            time.sleep(0.005) # dont flood CPU
-            return None
-        if not self.iDevices:
-            return None
-        if self.iDevices == {}:
-            return None
+            return       
+        self.releaseDevices()
+    def getInputEvent(self):
 
+        if not self.hasIDevices():
+            time.sleep(0.008) # dont flood CPU        
+            return None
+            
         event = None
         r, w, x = select(self.iDevices, [], [], self.env['runtime']['settingsManager'].getSettingAsFloat('screen', 'screenUpdateDelay'))
         if r != []:
@@ -54,7 +53,7 @@ class driver():
                     event = self.iDevices[fd].read_one()            
                 except:
                     #print('jow')
-                    del(self.iDevices[fd])
+                    self.removeDevice(fd)
                     return None
                 foreward = False
                 while(event):
@@ -146,7 +145,7 @@ class driver():
        
     def getLedState(self, led = 0):
         if not self._initialized:
-            return None    
+            return False    
         # 0 = Numlock
         # 1 = Capslock
         # 2 = Rollen
@@ -168,7 +167,7 @@ class driver():
                 self.ledDevices[i].set_led(led , 1)
     def grabDevices(self):
         if not self._initialized:
-            return None
+            return
         for fd in self.iDevices:
             try:        
                 self.uDevices[fd] = UInput.from_device(self.iDevices[fd].fn)
@@ -204,30 +203,39 @@ class driver():
 #              #'/dev/uinput'
 #            )
 #            dev.grab()
-
-    def releaseDevices(self):
+    def removeDevice(self,fd):
+        try:
+            self.iDevices[fd].ungrab()
+        except:
+            pass
+        try:
+            self.iDevices[fd].close()
+        except:
+            pass
+        try:
+            self.uDevices[fd].close()
+        except:
+            pass    
+    def hasIDevices(self):
         if not self._initialized:
-            return None    
+            return False
+        if not self.iDevices:
+            return False
+        if len(self.iDevices) == 0:
+            return False
+        return True    
+    
+    def releaseDevices(self):
+        if not self.hasIDevices():
+            return
         for fd in self.iDevices:
-            try:
-                self.iDevices[fd].ungrab()
-            except:
-                pass
-            try:
-                self.iDevices[fd].close()
-            except:
-                pass
-            try:
-                self.uDevices[fd].close()
-            except:
-                pass
-
+            self.removeDevice(fd)
         self.iDevices.clear()
         self.uDevices.clear()
 
     def __del__(self):
         if not self._initialized:
-            return None        
-        self.releaseDevices()
+            return      
+        self.shutdown()
 
 

src/fenrir/screenDriver/vcsaDriver.py

@@ -17,6 +17,7 @@ from utils import screen_utils
 class driver():
     def __init__(self):
         self.vcsaDevicePath = '/dev/vcsa'
+        self.ListSessions = None
     def initialize(self, environment):
         self.env = environment
     def shutdown(self):
@@ -62,24 +63,18 @@ class driver():
                                 return
         except Exception as e:
             self.env['runtime']['debug'].writeDebugOut(str(e),debug.debugLevel.ERROR)    
-        return
 
     def getSessionInformation(self):
-        progname = 'org.freedesktop.login1'
-        objpath  = '/org/freedesktop/login1'
-        intfname = 'org.freedesktop.login1.Manager'
-        methname = 'ListSessions'
-
         bus = dbus.SystemBus()
-
-        obj  = bus.get_object(progname, objpath)
-        inf = dbus.Interface(obj, intfname)
-        meth = inf.get_dbus_method(methname)
-
-        sessions = meth()
+        if not self.ListSessions:
+            obj  = bus.get_object('org.freedesktop.login1', '/org/freedesktop/login1')
+            inf = dbus.Interface(obj, 'org.freedesktop.login1.Manager')
+            self.ListSessions = inf.get_dbus_method('ListSessions')
+    
+        sessions = self.ListSessions()
         self.env['screenData']['autoIgnoreScreens'] = []
         for session in sessions:
-            obj = bus.get_object(progname, session[4])
+            obj = bus.get_object('org.freedesktop.login1', session[4])
             inf = dbus.Interface(obj, 'org.freedesktop.DBus.Properties')
             sessionType = inf.Get('org.freedesktop.login1.Session', 'Type')
             screen = str(inf.Get('org.freedesktop.login1.Session', 'TTY'))