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<div class="moz-cite-prefix">On 12-08-14 3:24 PM, patrick dudjalija
wrote:<br>
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<blockquote
cite="mid:CAEMqm6GttreSY5i+SA=Hg1=C8sAszQOu63miV_R5cfAW5a77Sw@mail.gmail.com"
type="cite">
<pre wrap="">Hi everybody !
I'm developing an educative game.
I've written a "gameEngine" class which does the logic for the general
progression in the game : switching between instances of morph
subclasses which implement intro screen / mini-games/levels / end
screen etc ...
Now, i need to synchronize the instance of the gameEngine class with
the instances of the other classes.
Example : once the gameEngine starts the instance of a morph subclass
which implements a mini-game, it must sleep until the mini-game is
finished, and then wake up and does further required switching (next
mini-game or intro screen or end screen ...).
i thought that a "simple" semaphore would quickly give a solution to
the problem.
But i get a freezed code.
I've modelized/simplified the problem with the following workspace code.
See also fileout of Class TestSynchro as attachment.
TestSynchro has a step method which prints some lines to Transcript,
then calls the method stopStepping and signal to the semaphore.
The workspace code does a wait, before printing to Transcript 'Hello World'!
Problem is that the code freezes , on the line code -> sem wait
I first thought that the code freezed because in the same process. And
added a fork to the block which creates instance of TestSynchro. But
it does'nt help ...
Any help will be appreciated !
Thanks by ad2vance,
Patrick Dudjalija
|ts sem|
sem:=Semaphore new.
[ts:= TestSynchro new.
ts semaphore:sem.
ts openInWorld.
ts start.] fork.
sem wait.
Transcript cr; show:'Hello world !';cr.
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</pre>
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<br>
<a class="moz-txt-link-freetext" href="http://stephane.ducasse.free.fr/FreeBooks/GuzdialBookDrafts/BuildUI-ch5.pdf">http://stephane.ducasse.free.fr/FreeBooks/GuzdialBookDrafts/BuildUI-ch5.pdf</a><br>
<br>
I don't know much about this stuff, but using Semaphore for
animations seems too low level. Pg. 53 of this pdf describes how
step and stepTime work. <br>
<br>
HTH,<br>
Chris <br>
<br>
<br>
<br>
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