SDL TTF_Render.... functions not work under thread function!!!

I'm making a programm under OpenSuse 11.1

I'm using SDL and ofcourse SDL_TTF.

when i render with the SDL's TTF function under main(), i have no problems, but when i render under thread i have segmentation fault.

There is not exist any typing or any competition (i'm using semaphores) but even if i try to render on a local SDL_Surface i'm having the Segmentation fault...


Please help

Hi -

Neither SDL_TTF nor SDL itself are intrinsically "thread safe"...
... but you should certainly be able to USE them with threads.

Q: Is it possible you initialize SDL_TTF in one thread...
... but use it in a different thread...
... and perhaps the first thread hasn't finished initializing before the second thread starts rendering?

Q: Have you tried segregating all your SDL calls into one thread?

It was mine mistake!

I use a SDL struct (Global declaration) for the fonts. So i load the fonts at the entry point -main()- but, i didn't had loaded the font's to the struct, before posting the semaphores for theading execution.

This had the result, of calling the SDL_RenterTextSolid( *font, ....) with a NULL pointer........ Segmentation fault. :-)

THANX!!!!!


So i't was mine mistake.


P.S. Threads are known as "how to shoot yourself in both feet at once."
Alan Cox