py: Switch to non-blocking eventfd

Blocking wait can be easily implemented on top in Python, so rather than
supporting only blocking reads, or supporting both non-blocking and
blocking reads, let's support only non-blocking reads.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/src/py/examples/simple-continuous-capture.py b/src/py/examples/simple-continuous-capture.py
index fe78a2dd..26a8060b 100755
--- a/src/py/examples/simple-continuous-capture.py
+++ b/src/py/examples/simple-continuous-capture.py
@@ -88,8 +88,9 @@ class CaptureContext:
     camera_contexts: list[CameraCaptureContext] = []
 
     def handle_camera_event(self):
-        # cm.get_ready_requests() will not block here, as we know there is an event
-        # to read.
+        # cm.get_ready_requests() returns the ready requests, which in our case
+        # should almost always return a single Request, but in some cases there
+        # could be multiple or none.
 
         reqs = self.cm.get_ready_requests()