From 774e4f769fa649a98edec3876443defa8239a50d Mon Sep 17 00:00:00 2001
From: "Carlos R. Mafra" <crmafra@gmail.com>
Date: Sat, 12 Jan 2019 21:22:15 +0000
Subject: [PATCH] wmmemload: call usleep() directly in main loop

The reason is the same as in the analogous patch for wmwifi
in commit 1e34ea7f980; it improves considerably the efficiency.

Keeping the 'interval' unchanged (set to 1 sec), with this change
the number of wakeups as measured by powertop goes from around 14 wakeups/sec
to around 2 wakeup/sec.
---
 wmmemload/src/main.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/wmmemload/src/main.c b/wmmemload/src/main.c
index ee038a9..f424398 100644
--- a/wmmemload/src/main.c
+++ b/wmmemload/src/main.c
@@ -53,6 +53,7 @@ static int mem_usage;
 static int swap_usage;
 static unsigned alarm_mem = 101;
 static unsigned alarm_swap = 101;
+time_t last_update = 0;
 
 /* prototypes */
 static void update(void);
@@ -121,8 +122,12 @@ int main(int argc, char **argv)
 
 	/* Main loop */
 	while (1) {
-		if (dockapp_nextevent_or_timeout(&event, update_interval * 1000)) {
-			/* Next Event */
+		if (time(NULL) != last_update)
+			update();
+
+		while (XPending(display)) {
+			XNextEvent(display, &event);
+
 			switch (event.type) {
 			case ButtonPress:
 				switch_light();
@@ -130,10 +135,8 @@ int main(int argc, char **argv)
 			default: /* make gcc happy */
 				break;
 			}
-		} else {
-			/* Time Out */
-			update();
 		}
+		usleep(update_interval*1000000L);
 	}
 
 	return 0;
@@ -180,6 +183,7 @@ static void update(void)
 
 	/* show */
 	dockapp_copy2window(pixmap);
+	time(&last_update);
 }
 
 /* called when mouse button pressed */