1 files changed, 13 insertions, 0 deletions
diff --git a/libudev/libudev-util.c b/libudev/libudev-util.c
index 6c309afd05..51dd017467 100644
--- a/libudev/libudev-util.c
+++ b/libudev/libudev-util.c
@@ -18,6 +18,7 @@
 #include <dirent.h>
 #include <ctype.h>
 #include <fcntl.h>
+#include <time.h>
 #include <sys/stat.h>
 
 #include "libudev.h"
@@ -553,3 +554,15 @@ uint64_t util_string_bloom64(const char *str)
 	bits |= 1LLU << ((hash >> 18) & 63);
 	return bits;
 }
+
+#define USEC_PER_SEC  1000000ULL
+#define NSEC_PER_USEC 1000ULL
+unsigned long long usec_monotonic(void)
+{
+	struct timespec ts;
+
+	if (clock_gettime(CLOCK_MONOTONIC, &ts) != 0)
+		return 0;
+	return (unsigned long long) ts.tv_sec * USEC_PER_SEC +
+	       (unsigned long long) ts.tv_nsec / NSEC_PER_USEC;
+}