At Thu, 13 Mar 2008 16:21:51 +0000, Alan Horstmann wrote: > > I've spent a couple of days pining this down. > > snd_pcm_hw_params_alloca() is part of the user API -right? But accomplished > as a #define in pcm.h. Because alloca can be used only with a macro due to its nature. > However if it is called inside a function, and the pointer stored for future > use, after leaving the function the allocation seems to have gone, and > attempting thereafter to use the pointer to access the hwparams space in > another API function results in seg-fault. > > This seems rather counter-intuitive (ie unexpected) to someone who has no > knowledge of the inner workings, but simply uses the API; the allocation > disappears without having been specifically free'd or released in any way. I > know that calling it globally gets round the problem, but certainly I could > do without all the debug needed to discover that. Well, alloca() is an (almost) standard stuff. You had a good lecture for a bit more deep studying C :) Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
