[SDL] Well, me again having problems with the Key Events...

[Manuel García Cabrera]

Seems to be working now... I inverted the roles, now I check events in
the "non-thread" and do the other things in the thread (constantly
process and blit images). Thanks


Manuel García Cabrera escribió:
> No, I'm not calling PollEvents in the same thread I call SetVideoMode...
> Can that be the problem? And the enviar thing, don't worry about that...
> 
> Doug escribió:
>> This is just an idea, as I'm not sure if this is your problem or not.
>>
>> Read this: http://www.libsdl.org/cgi/docwiki.cgi/SDL_5fPumpEvents
>>
>> Notice two things:
>>
>> 1. SDL_PollEvent() calls SDL_PumpEvents() internally.  So if you're calling 
>> SDL_PollEvent() then SDL_PumpEvents() is being invoked implicitly.
>>
>> 2. SDL_PumpEvents() note: You can only call this function in the thread that 
>> set the video mode.
>>
>> So, I'm wondering if the thread you call SDL_PollEvent() is the same thread 
>> you used to set the video mode.  If not, this may or may not be a problem for 
>> you.  I've called some SDL functions in threads and I got away with it - maybe 
>> because I used a thread safe SDL function or I was just lucky.
>>
>> Unfortunately, I have not found a "master list" of which SDL functions are 
>> thread-safe and which are not.  Some are documented as such, but I'm not 
>> convinced that all other SDL functions are thread safe.
>>
>>
>> The only other thing I noticed is this line:
>>
>>    while ( SDL_PollEvent(&evento) || (enviar) ){
>>
>> This means you can enter your event handler if envair is true but 
>> SDL_PollEvent() returned false.  This means the code in the while loop may 
>> possibly be accessing evento members that are not necessarily initialized to 
>> meaningful values.  Just a thought.
>>
>> Doug.
>>
>>
>> _______________________________________________
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>> SDL at lists.libsdl.org
>> http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org
>>
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