use the new get machine id code to fix a race condition bug

resources/lib/Lock.py

@@ -0,0 +1,40 @@
+import os
+import time
+import errno
+import xbmc
+
+class Lock:
+    
+    def __init__(self, filename):
+        self.filename = filename
+        self.delay = 0.5
+        self.timeout = 10
+        self.is_locked = False
+        self.fd = None
+    
+    def acquire(self):
+        start_time = time.time()
+        while True:
+            try:
+                self.fd = os.open(self.filename, os.O_CREAT|os.O_RDWR|os.O_EXCL)
+                break;
+            except OSError as e:
+                if (time.time() - start_time) >= self.timeout:
+                    xbmc.log("File_Lock_On " + self.filename + " timed out")
+                    return False
+                #xbmc.log("File_Lock_On " + self.filename + " error " + str(e))
+            time.sleep(self.delay)
+        self.is_locked = True
+        xbmc.log("File_Lock_On " + self.filename + " obtained")
+        return True
+        
+    def release(self):
+        if self.is_locked:
+            os.close(self.fd)
+            os.unlink(self.filename)
+            self.is_locked = False
+            xbmc.log("File_Lock_On " + self.filename + " released")
+        
+    def __del__(self):
+        self.release()
+