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Extend the EventLoop class to support watching file descriptors for
read and write events.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
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Cam uses libevent to deal with threads and idle loop while still
implementing its own event queue. This creates issues when the event
loop is terminated as it might get stuck in the idle loop if exit() is
called while the thread is busy with dispatchCalls().
Solve this by removing the custom event execution and instead injecting
the calls as events to the base event loop.
Reported-by: Sebastian Fricke <sebastian.fricke@posteo.net>
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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The 'event' variable name is usually used for events added to the base
event loop, not the loop itself. Rename the struct event_base member to
base_ as a preparation for future work adding events to the loop.
There is no functional change.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Add a deferred cals queue to the EventLoop class to support queuing
calls from a different thread and processing them in the event loop's
thread.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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To prepare for removal of the EventDispatcher from the libcamera public
API, switch to libevent to handle the event loop.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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Add a simple event loop to the cam application and use it in the main()
function, with an example of how to handle SIGINT to gracefully stop the
loop.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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