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authorTakashi Iwai <tiwai@suse.de>2018-04-23 17:24:56 +0200
committerTakashi Iwai <tiwai@suse.de>2018-04-24 13:41:53 +0200
commita9c2dfc8527318a27db045cd7ea51e8ecab8c884 (patch)
treef951cd3875949bf9b330ac2fa62b252003da42f7 /include/sound
parentf656891c66193345ee90b212b280d726792dc16c (diff)
ALSA: hda - Use a macro for snd_array iteration loops
Introduce a new helper macro, snd_array_for_each(), to iterate for each snd_array element. It slightly improves the readability than lengthy open codes at each place. Along with it, add const prefix to some obvious places. There should be no functional changes by this. Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include/sound')
-rw-r--r--include/sound/hdaudio.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h
index 06536e01ed94..c052afc27547 100644
--- a/include/sound/hdaudio.h
+++ b/include/sound/hdaudio.h
@@ -571,4 +571,9 @@ static inline unsigned int snd_array_index(struct snd_array *array, void *ptr)
return (unsigned long)(ptr - array->list) / array->elem_size;
}
+/* a helper macro to iterate for each snd_array element */
+#define snd_array_for_each(array, idx, ptr) \
+ for ((idx) = 0, (ptr) = (array)->list; (idx) < (array)->used; \
+ (ptr) = snd_array_elem(array, ++(idx)))
+
#endif /* __SOUND_HDAUDIO_H */