1 files changed, 32 insertions, 0 deletions
diff --git a/libbb/time.c b/libbb/time.c
new file mode 100644
index 000000000..f2a741521
--- /dev/null
+++ b/libbb/time.c
@@ -0,0 +1,32 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Utility routines.
+ *
+ * Copyright (C) 2007 Denis Vlasenko
+ *
+ * Licensed under GPL version 2, see file LICENSE in this tarball for details.
+ */
+
+#include "libbb.h"
+
+#if ENABLE_MONOTONIC_SYSCALL
+#include <sys/syscall.h>
+
+/* libc has incredibly messy way of doing this,
+ * typically requiring -lrt. We just skip all this mess */
+unsigned long long monotonic_us(void)
+{
+	struct timespec ts;
+	if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts))
+		bb_error_msg_and_die("clock_gettime(MONOTONIC) failed");
+	return ts.tv_sec * 1000000ULL + ts.tv_nsec/1000;
+}
+#else
+unsigned long long monotonic_us(void)
+{
+	struct timeval tv;
+	if (gettimeofday(&tv, NULL))
+		bb_error_msg_and_die("gettimeofday failed");
+	return tv.tv_sec * 1000000ULL + tv_usec;
+}
+#endif