From 1e32a1f6c017f73527b2e04b279b135cea4614ae Mon Sep 17 00:00:00 2001
From: icex2 <djh.icex2@gmail.com>
Date: Sat, 23 Jan 2021 23:19:48 +0100
Subject: [PATCH] util/time: Add functions to measure time

---
 src/main/util/time.c | 29 +++++++++++++++++++++++++++++
 src/main/util/time.h | 10 ++++++++++
 2 files changed, 39 insertions(+)

diff --git a/src/main/util/time.c b/src/main/util/time.c
index acee0f5..daf71e8 100644
--- a/src/main/util/time.c
+++ b/src/main/util/time.c
@@ -66,4 +66,33 @@ void util_time_get_current_time(struct util_time_timestamp* timestamp)
     timestamp->month = tm->tm_mon + 1;
     // Years since 1900
     timestamp->year = tm->tm_year + 1900;
+}
+
+uint64_t util_time_now_ns()
+{
+    struct timespec ts;
+
+    clock_gettime(0, &ts);
+
+    return ts.tv_sec * 1000000000 + ts.tv_nsec;
+}
+
+uint64_t util_time_delta_ns(uint64_t prev_ns, uint64_t now_ns)
+{
+    return now_ns - prev_ns;
+}
+
+double util_time_delta_us(uint64_t prev_ns, uint64_t now_ns)
+{
+    return util_time_delta_ns(prev_ns, now_ns) / 1000.0;
+}
+
+double util_time_delta_ms(uint64_t prev_ns, uint64_t now_ns)
+{
+    return util_time_delta_ns(prev_ns, now_ns) / 1000.0 / 1000.0;
+}
+
+double util_time_delta_sec(uint64_t prev_ns, uint64_t now_ns)
+{
+    return util_time_delta_ns(prev_ns, now_ns) / 1000.0 / 1000.0 / 1000.0;
 }
\ No newline at end of file
diff --git a/src/main/util/time.h b/src/main/util/time.h
index 80f106b..9d66147 100644
--- a/src/main/util/time.h
+++ b/src/main/util/time.h
@@ -23,4 +23,14 @@ void util_time_sleep_sec(uint64_t time_sec);
 
 void util_time_get_current_time(struct util_time_timestamp* timestamp);
 
+uint64_t util_time_now_ns();
+
+uint64_t util_time_delta_ns();
+
+double util_time_delta_us(uint64_t prev_ns, uint64_t now_ns);
+
+double util_time_delta_ms(uint64_t prev_ns, uint64_t now_ns);
+
+double util_time_delta_sec(uint64_t prev_ns, uint64_t now_ns);
+
 #endif //UTIL_TIME_H