fix more threading issues; add users metric

2019-09-18 15:40:23 +02:00
parent 6f983ccb6b
commit 30512e347a
3 changed files with 19 additions and 8 deletions
--- a/owrx/metrics.py
+++ b/owrx/metrics.py
@ -1,3 +1,5 @@
+import threading
+
 class Metric(object):
    def getValue(self):
        return 0
@ -24,11 +26,13 @@ class DirectMetric(Metric):

 class Metrics(object):
    sharedInstance = None
+    creationLock = threading.Lock()

    @staticmethod
    def getSharedInstance():
-        if Metrics.sharedInstance is None:
-            Metrics.sharedInstance = Metrics()
+        with Metrics.creationLock:
+            if Metrics.sharedInstance is None:
+                Metrics.sharedInstance = Metrics()
        return Metrics.sharedInstance

    def __init__(self):