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+/*
+ Copyright 2011-2014 David Robillard <http://drobilla.net>
+
+ Permission to use, copy, modify, and/or distribute this software for any
+ purpose with or without fee is hereby granted, provided that the above
+ copyright notice and this permission notice appear in all copies.
+
+ THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+/**
+ @file bench.h A simple real-time benchmarking API.
+*/
+
+#ifndef BENCH_H
+#define BENCH_H
+
+#define _POSIX_C_SOURCE 200809L
+
+#include <time.h>
+#include <sys/time.h>
+
+static inline double
+bench_elapsed_s(const struct timespec* start, const struct timespec* end)
+{
+ return ((end->tv_sec - start->tv_sec)
+ + ((end->tv_nsec - start->tv_nsec) * 0.000000001));
+}
+
+static inline struct timespec
+bench_start(void)
+{
+ struct timespec start_t;
+ clock_gettime(CLOCK_REALTIME, &start_t);
+ return start_t;
+}
+
+static inline double
+bench_end(const struct timespec* start_t)
+{
+ struct timespec end_t;
+ clock_gettime(CLOCK_REALTIME, &end_t);
+ return bench_elapsed_s(start_t, &end_t);
+}
+
+#endif /* BENCH_H */