From 7d683ef39979dd3d458decf7a5e95ac1394db4bd Mon Sep 17 00:00:00 2001
From: Blake Blackshear <blakeb@blakeshome.com>
Date: Sun, 11 Oct 2020 09:48:40 -0500
Subject: [PATCH] cleanup frame queue

---
 detect_objects.py | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/detect_objects.py b/detect_objects.py
index ee2749fb4..751ea4622 100644
--- a/detect_objects.py
+++ b/detect_objects.py
@@ -303,8 +303,15 @@ def main():
         event_processor.join()
         object_processor.join()
         camera_watchdog.join()
-        for camera_process in camera_processes.values():
+        for camera_name, camera_process in camera_processes.items():
             camera_process['capture_thread'].join()
+            # cleanup the frame queue
+            while not camera_process['frame_queue'].empty():
+                frame_time = camera_process['frame_queue'].get()
+                shm = mp.shared_memory.SharedMemory(name=f"{camera_name}{frame_time}")
+                shm.close()
+                shm.unlink()
+
         for detector in detectors:
             detector.stop()
         for shm in camera_shms: