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Author SHA1 Message Date
William Wilgus
f45db552f3 lua rockev rewrite
After a few issues with the timer code in the hosted players

I realized a few shortcomings in the original rockev code...
This rewrite gives thread_exit an explicit flag instead of 0
custom events now have a set-able timeout
previous lua hooks are restored
flags are stored in uint8_t

Change-Id: I9ca45246ac9233a2faa581e26a8cc5e5fb512e88
2019-11-15 14:28:03 +01:00
William Wilgus
7f1e6b4638 lua rockev cleanup
with the addition of suspending all events on thread start and exit
we don't really need to block on THREAD_QUIT in so many places

Removed suspend clearing on event unregister and updated comments

Change-Id: Id9c6a460def558c5331ee292035691a9f82b2c43
2019-10-07 22:07:22 -05:00
William Wilgus
19084181a1 lua rockev fix possible race on thread exit
report of call after free on event thread on Agptek Rocker
I'm guessing its a race condition between the thread and the timer
but can't say for sure without some more testing

Change-Id: If11bd718b3cfa81ea13fff378df56d12afa17a7f
2019-10-08 01:09:52 +02:00
William Wilgus
3d06d35bf6 lua rock events crash on error in main state
on errors thread stack overflows
yielding before thread_exit() is a bad idea apparently

Change-Id: Iac45d4321fac496738384fdbbeb480356ef2a1bb
2019-08-12 07:28:24 +02:00
William Wilgus
90118f14cf lua add demo scripts, atexit handler, gui_scrollbar_draw
Change-Id: Ie8794e8a487f73952dae43e036787b6972fdbbee
2019-07-29 02:51:29 -05:00
William Wilgus
3e2b50ed3b lua events from rockbox
This library allows events to be subscribed / recieved within a lua script
most events in rb are synchronous so flags are set and later checked by a
secondary thread to make them (semi?) asynchronous.

There are a few caveats to be aware of:

FIRST, The main lua state is halted till the lua callback(s) are finished
 Yielding will not return control to your script from within a callback
 Also, subsequent callbacks may be delayed by the code in your lua callback
SECOND, You must store the value returned from the event_register function
 you might get away with it for a bit but gc will destroy your callback
 eventually if you do not store the event
THIRD, You only get one cb per event type
 ["action", "button", "custom", "playback", "timer"]
 (Re-registration of an event overwrites the previous one)

Usage:
 possible events =["action", "button", "custom", "playback", "timer"]

 local evX = rockev.register("event", cb_function, [timeout / flags])
  cb_function([id] [, data]) ... end

 rockev.suspend(["event"/nil][true/false]) passing nil affects all events
  stops event from executing, any but the last event before
  re-enabling will be lost, passing false, unregistering or re-registering
  an event will clear the suspend

 rockev.trigger("event", [true/false], [id])
  sets an event to triggered,
  NOTE!, CUSTOM_EVENT must be unset manually
  id is only passed to callback by custom and playback events

 rockev.unregister(evX)
  Use unregister(evX) to remove an event
  Unregistering is not necessary before script end, it will be
  cleaned up on script exit

Change-Id: Iea12a5cc0c0295b955dcc1cdf2eec835ca7e354d
2019-07-19 20:48:34 -05:00