1 files changed, 12 insertions, 0 deletions
diff --git a/power/utils.c b/power/utils.c
index 202b718..ac73edd 100644
--- a/power/utils.c
+++ b/power/utils.c
@@ -33,6 +33,7 @@
 #include <errno.h>
 #include <string.h>
 #include <stdlib.h>
+#include <sys/stat.h>
 
 #include "utils.h"
 #include "list.h"
@@ -42,6 +43,9 @@
 #define LOG_TAG "QCOM PowerHAL"
 #include <utils/Log.h>
 
+#define USINSEC 1000000L
+#define NSINUS 1000L
+
 #define SOC_ID_0 "/sys/devices/soc0/soc_id"
 #define SOC_ID_1 "/sys/devices/system/soc/soc0/id"
 
@@ -391,6 +395,14 @@ void start_prefetch(int pid, const char* packageName) {
     }
 }
 
+long long calc_timespan_us(struct timespec start, struct timespec end)
+{
+    long long diff_in_us = 0;
+    diff_in_us += (end.tv_sec - start.tv_sec) * USINSEC;
+    diff_in_us += (end.tv_nsec - start.tv_nsec) / NSINUS;
+    return diff_in_us;
+}
+
 int get_soc_id(void)
 {
     int fd;