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2018-05-21events: Add a cleanup functionLaurent Pinchart
Add events to the watch list allocates memory. Add a cleanup function to free all memory at cleanup time without having to remove all events explicitly one by one. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2018-05-21events: Extend the events_unwatch_fd() API with an event typeLaurent Pinchart
If a single file descriptor is being watch for multiple event types, it will be present in multiple entries in the watch list. The events_unwatch_fd() function will remove the first entry regardless of its type, not allowing removal of a particular event type. Fix this by extending the events_unwatch_fd() API to take an event type, and remove the corresponding entry. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2018-05-21events: Import event handling library from omap3-isp-liveLaurent Pinchart
The omap3-isp-live project [1] includes a generic event handling library that implements a select-based loop. Instead of reinventing the wheel, import the library and use it. The original license hasn't been modified, and includes both GPL-2.0+ and LGPL-2.1+ code. The sole copyright owner is Laurent Pinchart. [1] git://git.ideasonboard.org/omap3-isp-live.git Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>