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	tReuse the mixer handle if possible to reduce CPU usage - spoon - dwm status ut…
	git clone git://src.adamsgaard.dk/spoon
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	---
	commit a722598c8613433000b5d3fae11e776ff9f438c2
	parent 3cf78be48fa1328e4f0d8e36c8a1576aa90b8388
	Author: lostd <[email protected]>
	Date: Mon, 7 Nov 2016 12:13:47 +0000

	Reuse the mixer handle if possible to reduce CPU usage

	Diffstat:
	M mix.c \| 13 +++++++++----

	1 file changed, 9 insertions(+), 4 deletions(-)
	---
	diff --git a/mix.c b/mix.c
	t@@ -71,15 +71,18 @@ mixread(void arg, char buf, size_t len)
	{
	snd_mixer_selem_id_t *id;
	snd_mixer_elem_t *elem;
	- snd_mixer_t *mixerp;
	+ static snd_mixer_t *mixerp;
	long min, max, vol;
	- int ret = -1, r;
	+ int r;
	int master;

	snd_mixer_selem_id_alloca(&id);
	snd_mixer_selem_id_set_name(id, "Master");
	snd_mixer_selem_id_set_index(id, 0);

	+ if (mixerp != NULL)
	+ goto readvol;
	+
	r = snd_mixer_open(&mixerp, O_RDONLY);
	if (r < 0) {
	warnx("snd_mixer_open: %s", snd_strerror(r));
	t@@ -100,6 +103,7 @@ mixread(void arg, char buf, size_t len)
	warnx("snd_mixer_load: %s", snd_strerror(r));
	goto out;
	}
	+readvol:
	elem = snd_mixer_find_selem(mixerp, id);
	if (elem == NULL) {
	warnx("could not find mixer element");
	t@@ -126,9 +130,10 @@ mixread(void arg, char buf, size_t len)
	else
	master = 100 * vol / max;
	snprintf(buf, len, "%d%%", master);
	- ret = 0;
	+ return 0;
	out:
	snd_mixer_close(mixerp);
	- return ret;
	+ mixerp = NULL;
	+ return -1;
	}
	#endif