Add lv2bench utility.

git-svn-id: http://svn.drobilla.net/lad/trunk/lilv@4660 a436a847-0d15-0410-975c-d299462d15a1

1 files changed, 52 insertions, 0 deletions

diff --git a/utils/bench.h b/utils/bench.h
new file mode 100644
index 0000000..948622c
--- /dev/null
+++ b/utils/bench.h
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+/*
+  Copyright 2011-2012 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 199309L
+
+#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()
+{
+	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 */