From cedca7b8b843413217b399ea1323c727994237ce Mon Sep 17 00:00:00 2001
From: clsr <clsr@clsr.net>
Date: Thu, 9 Aug 2018 18:18:44 +0200
Subject: Add exact sleep

---
 config.def.mk | 14 +++++++++++---
 dwmclock.c    | 15 +++++++++++++++
 2 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/config.def.mk b/config.def.mk
index 1860aaf..4265c82 100644
--- a/config.def.mk
+++ b/config.def.mk
@@ -6,20 +6,26 @@ CFLAGS+=-DBATTERY
 # set this to the correct path for your current system
 CFLAGS+=-DENERGY_FULL=\"/sys/class/power_supply/BAT0/energy_full\"
 CFLAGS+=-DENERGY_NOW=\"/sys/class/power_supply/BAT0/energy_now\"
-CFLAGS+=-DSTATUS=\"/sys/class/power_supply/BAT0/status\"
+CFLAGS+=-DSTATUS=\"/sys/class/power_supply/ADP1/online\"
+
 # the string to match when the battery is charging; comment out to disable charging detection
-CFLAGS+=-DCHARGING=\"Charging\\n\"
+CFLAGS+=-DCHARGING=\"1\\n\"
 
 # possible alternative on some systems
 #CFLAGS+=-DENERGY_FULL=\"/sys/class/power_supply/BAT0/charge_full\"
 #CFLAGS+=-DENERGY_NOW=\"/sys/class/power_supply/BAT0/charge_now\"
+#CFLAGS+=-DSTATUS=\"/sys/class/power_supply/BAT0/status\"
+#CFLAGS+=-DCHARGING=\"Charging\\n\"
 
 # every how many seconds to refresh the battery charge display
-CFLAGS+=-DBAT_REFRESH_SECONDS=60
+CFLAGS+=-DBAT_REFRESH_SECONDS=10
 
 # this is here for legacy reasons, ignore it
 CFLAGS+=-DMUL=1
 
+# sleep to the start of the next second instead of for 1s
+CFLAGS+=-DEXACT_SLEEP
+
 
 # make settings
 
@@ -33,3 +39,5 @@ LDFLAGS+=$(shell pkg-config --libs x11)
 # default paths
 DESTDIR?=/
 PREFIX?=/usr/local
+#DESTDIR?=~
+#PREFIX?=/local
diff --git a/dwmclock.c b/dwmclock.c
index e7fd938..b409555 100644
--- a/dwmclock.c
+++ b/dwmclock.c
@@ -62,6 +62,9 @@ void handler(int sig)
 
 int main(void)
 {
+#ifdef EXACT_SLEEP
+	struct timespec ts;
+#endif /* EXACT_SLEEP */
 	struct tm *tm;
 	time_t now;
 #ifdef BATTERY
@@ -128,13 +131,25 @@ int main(void)
 		perc[7] = ' ';
 #endif /* BATTERY */
 
+#ifdef EXACT_SLEEP
+		clock_gettime(CLOCK_REALTIME, &ts);
+		now = ts.tv_sec;
+#else
 		now = time(NULL);
+#endif /* EXACT_SLEEP */
 		tm = localtime(&now);
 		strftime(clock, 9, "%H:%M:%S", tm);
 
 		XStoreName(disp, root, name);
 		XFlush(disp);
+
+#ifdef EXACT_SLEEP
+		ts.tv_sec = 0;
+		ts.tv_nsec = 1000000000 - ts.tv_nsec;
+		nanosleep(&ts, NULL);
+#else
 		sleep(1);
+#endif /* EXACT_SLEEP */
 	}
 	XCloseDisplay(disp);
 
-- 
cgit