2 files changed, 11 insertions, 0 deletions
diff --git a/utils.c b/utils.c
index ce2f2a9..38b5803 100644
--- a/utils.c
+++ b/utils.c
@@ -43,6 +43,9 @@
 #define LOG_TAG "QTI PowerHAL"
 #include <log/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"
 
@@ -359,3 +362,10 @@ int get_soc_id(void) {
     close(fd);
     return soc_id;
 }
+
+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;
+}
diff --git a/utils.h b/utils.h
index b4aa2a5..2c46a20 100644
--- a/utils.h
+++ b/utils.h
@@ -44,4 +44,5 @@ void interaction(int duration, int num_args, int opt_list[]);
 int interaction_with_handle(int lock_handle, int duration, int num_args, int opt_list[]);
 int perf_hint_enable(int hint_id, int duration);
 
+long long calc_timespan_us(struct timespec start, struct timespec end);
 int get_soc_id(void);