Add xxhash

third_party/xxhash/tests/bench/benchHash.h

@@ -0,0 +1,67 @@
+/*
+*  Hash benchmark module
+*  Part of the xxHash project
+*  Copyright (C) 2019-2021 Yann Collet
+*
+*  GPL v2 License
+*
+*  This program is free software; you can redistribute it and/or modify
+*  it under the terms of the GNU General Public License as published by
+*  the Free Software Foundation; either version 2 of the License, or
+*  (at your option) any later version.
+*
+*  This program is distributed in the hope that it will be useful,
+*  but WITHOUT ANY WARRANTY; without even the implied warranty of
+*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+*  GNU General Public License for more details.
+*
+*  You should have received a copy of the GNU General Public License along
+*  with this program; if not, write to the Free Software Foundation, Inc.,
+*  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*
+*  You can contact the author at:
+*  - xxHash homepage: https://www.xxhash.com
+*  - xxHash source repository: https://github.com/Cyan4973/xxHash
+*/
+
+
+#ifndef BENCH_HASH_H_983426678
+#define BENCH_HASH_H_983426678
+
+#if defined (__cplusplus)
+extern "C" {
+#endif
+
+
+/* ===  Dependencies  === */
+
+#include "benchfn.h"   /* BMK_benchFn_t */
+
+
+/* ===  Declarations  === */
+
+typedef enum { BMK_throughput, BMK_latency } BMK_benchMode;
+
+typedef enum { BMK_fixedSize,   /* hash always `size` bytes */
+               BMK_randomSize,  /* hash a random nb of bytes, between 1 and `size` (inclusive) */
+} BMK_sizeMode;
+
+/*
+ * bench_hash():
+ * Returns speed expressed as nb hashes per second.
+ * total_time_ms: time spent benchmarking the hash function with given parameters
+ * iter_time_ms: time spent for one round. If multiple rounds are run,
+ *               bench_hash() will report the speed of best round.
+ */
+double bench_hash(BMK_benchFn_t hashfn,
+                  BMK_benchMode benchMode,
+                  size_t size, BMK_sizeMode sizeMode,
+                  unsigned total_time_ms, unsigned iter_time_ms);
+
+
+
+#if defined (__cplusplus)
+}
+#endif
+
+#endif /* BENCH_HASH_H_983426678 */