charts: clarify timeout units as microseconds

This API is targeting poll() usage which implies microseconds,
but let's better clarify it in naming.

2 files changed, 4 insertions, 4 deletions

diff --git a/src/charts.c b/src/charts.c
index 57e3dc9..07c9e8d 100644
--- a/src/charts.c
+++ b/src/charts.c
@@ -1255,8 +1255,8 @@ static float delta(struct timeval *cur, struct timeval *prev)
 }
 
 
-/* update the charts if necessary, return if updating occurred, and duration before another update needed in *desired_delay */
-int vwm_charts_update(vwm_charts_t *charts, int *desired_delay)
+/* update the charts if necessary, return if updating occurred, and duration before another update needed in *desired_delay_us */
+int vwm_charts_update(vwm_charts_t *charts, int *desired_delay_us)
 {
 	float	this_delta = 0.0f;
 	int	ret = 0;
@@ -1311,7 +1311,7 @@ int vwm_charts_update(vwm_charts_t *charts, int *desired_delay)
 	}
 
 	/* TODO: make some effort to compute how long to sleep, but this is perfectly fine for now. */
-	*desired_delay = charts->sampling_interval == INFINITY ? -1 : charts->sampling_interval * 300.0;
+	*desired_delay_us = charts->sampling_interval == INFINITY ? -1 : charts->sampling_interval * 300.0;
 
 	return ret;
 }
diff --git a/src/charts.h b/src/charts.h
index c6bf88f..e175d18 100644
--- a/src/charts.h
+++ b/src/charts.h
@@ -18,7 +18,7 @@ void vwm_charts_destroy(vwm_charts_t *charts);
 void vwm_charts_rate_increase(vwm_charts_t *charts);
 void vwm_charts_rate_decrease(vwm_charts_t *charts);
 void vwm_charts_rate_set(vwm_charts_t *charts, unsigned hertz);
-int vwm_charts_update(vwm_charts_t *charts, int *desired_delay);
+int vwm_charts_update(vwm_charts_t *charts, int *desired_delay_us);
 
 vwm_chart_t * vwm_chart_create(vwm_charts_t *charts, int pid, int width, int height, const char *name);
 void vwm_chart_destroy(vwm_charts_t *charts, vwm_chart_t *chart);