http://giderosmobile.com/forum/discussions/tagged/synchronization/feed.rss Thu, 23 May 13 01:45:05 -0400 Tagged with synchronization - Gideros Forums en-CA http://giderosmobile.com/forum/discussion/971/semaphores-synchronization-locked-during-callback-functions Wed, 09 May 2012 20:32:32 -0400 kussakov 971@/forum/discussions
I have a few questions:

1. Is there a way to synchronize things (like semaphores) in Gideros?
E.g. Some way for the code to wait like a millisecond until some callback function is completed.
Like synchronized(something){... some code ...} in objective C...

2. Many physics APIs are locked during callbacks.
What does that mean?
Are they locked while the physics world is doing a "step()"?
Or are they just locked INSIDE a physics callback (like on event Event.POST_SOLVE callback)?
Say I have a game and I want to destroy or add bodies due to some user actions.
Create and destroy body are locked during callbacks...
The user actions a completely outside the physics callbacks. Is this safe?
I am asking because I was doing a test - when the user touches the screen I would add many sprites to the scene + corresponding bodies to the physical world.
Very occasionally there is a sprite that does not move as if the engine could not create and associate a body for it. There are no errors.

3. If you answer to question 2 is "locked during a step()" - then I need some kind of semaphores to synchronize the physics world locked stuff with the users actions and make sure they don't happen while the wold is doing a step (which is happening on Event.ENTER_FRAME by the way).

Since the entire thing works only in callbacks (touches, physics, enter frame, etc.) it will be very hard to work with locked functions without semaphores.
And I can't use global variables for that because the code has to wait...

Thanks

Vlad
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