thread fixes

[kazzmir]

this merge has two fixes

1. fix for issue 46 in PSL1GHT: semaphore max value ps3dev/PSL1GHT#46
   by setting the maximum semaphore value to 1000
2. set the stack size for new threads to 64k from 16k.

[zeldin]

Hi. Thank you for your contribution.

The semaphore issue has already been fixed by pull request #7.

Regarding the stack size, it is of course the case that 16K will not be enough for every possible thread function. But the same can be said about 64K. Is there some particularly important function with a stack requirement between 16K and 64K which this change aims to support?

[kazzmir]

I used email to respond but maybe it didn't work. Anyway the 64k limit is arbitrary but since 16k is as well then it seems to me whoever requests a higher limit should be accomodated until the limit is arguably unreasonable.

Would a compromise be to add a secret global variable that I can adjust in my application?

int SDL_ps3_stack_size_hack;

[zeldin]

Hm... A secret variable feels a little kludgey, but I would accept using something like SDL_getenv("SDL_THREAD_STACK_SIZE") to allow the default size to be overridden. That would make the code portable to other SDL ports (with dynamic stack size) as well.

[kazzmir]

Ok sounds good to me. I'll send a pull request if you don't get to it first.

[bgK]

SDL 1.3 introduced the "hints" mecanism to replace environment variables, see SDL_hints.h.

[kazzmir]

SDL_PSL1GHT does not contain SDL_hints.h, yet. Is the plan to add it in? If not should the environment variable be used?

[bgK]

Cough, https://github.com/zeldin/SDL_PSL1GHT/blob/master/include/SDL_hints.h, cough