[alsa-devel] Scope of snd_pcm_hw_params_alloca() ?

Alan Horstmann gineera at aspect135.co.uk
Fri Mar 14 13:19:57 CET 2008

On Thursday 13 March 2008 16:44, you wrote:
> At Thu, 13 Mar 2008 16:21:51 +0000,
> Alan Horstmann wrote:
> > 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.

So would it be better in this case to use the malloc /free functions if 
possible?  Am I right that they are not provided in salsa, so alloca would be 
necessary to use that lib?


More information about the Alsa-devel mailing list