Update of /cvsroot/alsa/alsa-lib/src/pcm In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv11463
Modified Files: pcm.c Log Message: Next documentation update for file descriptor routines Index: pcm.c =================================================================== RCS file: /cvsroot/alsa/alsa-lib/src/pcm/pcm.c,v retrieving revision 1.281 retrieving revision 1.282 diff -u -r1.281 -r1.282 --- pcm.c 31 Mar 2004 14:16:31 -0000 1.281 +++ pcm.c 5 Apr 2004 17:59:34 -0000 1.282 @@ -1226,7 +1226,12 @@ * call, use \link ::snd_pcm_poll_descriptors_revents() \endlink function. * The field values in pollfd structs may be bogus regarding the stream * direction from the application perspective (POLLIN might not imply read - * direction and POLLOUT might not imply write). + * direction and POLLOUT might not imply write), but + * the \link ::snd_pcm_poll_descriptors_revents() \endlink function + * does the right "demangling". + * + * You can use output from this function as arguments for the select() + * syscall, too. */ int snd_pcm_poll_descriptors(snd_pcm_t *pcm, struct pollfd *pfds, unsigned int space) { @@ -1258,6 +1263,11 @@ * * This function does "demangling" of the revents mask returned from * the poll() syscall to correct semantics (POLLIN = read, POLLOUT = write). + * + * Note: The null event also exists. Even if poll() or select() + * syscall returned that some events are waiting, this function might + * return empty set of events. In this case, application should + * do next event waiting using poll() or select(). */ int snd_pcm_poll_descriptors_revents(snd_pcm_t *pcm, struct pollfd *pfds, unsigned int nfds, unsigned short *revents) { ------------------------------------------------------- This SF.Net email is sponsored by: IBM Linux Tutorials Free Linux tutorial presented by Daniel Robbins, President and CEO of GenToo technologies. Learn everything from fundamentals to system administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click _______________________________________________ Alsa-cvslog mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-cvslog