1 files changed, 42 insertions, 0 deletions
diff --git a/src/light_thread.c b/src/light_thread.c
new file mode 100644
index 0000000..1d273a0
--- /dev/null
+++ b/src/light_thread.c
@@ -0,0 +1,42 @@
+// XXX signals, includes, open, write instead of fopen, fwrite
+
+#include <stdio.h>
+
+#include <stdint.h>
+#include <sys/time.h>
+
+#include "common.h"
+#include "consts.h"
+#include "config.h"
+#include "backlight.h"
+
+uint64_t time_since_press(void) {
+	struct timeval now;
+
+	uint64_t now_usec;
+	uint64_t press_usec;
+	uint64_t diff;
+
+	gettimeofday(&now, NULL);
+
+	now_usec  = now.tv_sec * 1000000L;
+	now_usec += now.tv_usec;
+
+	press_usec  = last_press->tv_sec * 1000000L;
+	press_usec += last_press->tv_usec;
+
+	diff = now_usec - press_usec;
+
+	return diff;
+}
+
+int light_thread(void) {
+	while (1) {
+		if (time_since_press() > BACKLIGHT_TIME) backlight_off();
+		else								     backlight_on();
+
+		usleep(THREAD_WAIT);
+	}
+
+	return 0;
+}