From 221e0f232be0ceb5c00560ec03e5f6afa0c49e81 Mon Sep 17 00:00:00 2001
From: Jakob Ketterl <jakob.ketterl@gmx.de>
Date: Mon, 27 Dec 2021 16:37:10 +0100
Subject: [PATCH] try to avoid "can only be started once" error

---
 owrx/cpu.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/owrx/cpu.py b/owrx/cpu.py
index cad912f..e296426 100644
--- a/owrx/cpu.py
+++ b/owrx/cpu.py
@@ -22,6 +22,7 @@ class CpuUsageThread(threading.Thread):
         self.last_worktime = 0
         self.last_idletime = 0
         self.endEvent = threading.Event()
+        self.startLock = threading.Lock()
         super().__init__()
 
     def run(self):
@@ -59,8 +60,9 @@ class CpuUsageThread(threading.Thread):
 
     def add_client(self, c):
         self.clients.append(c)
-        if not self.is_alive():
-            self.start()
+        with self.startLock:
+            if not self.is_alive():
+                self.start()
 
     def remove_client(self, c):
         try: