ceph/src/boost/libs/beast/test/extras/include/boost/beast/test/throughput.hpp

   1 //
   2 // Copyright (c) 2016-2017 Vinnie Falco (vinnie dot falco at gmail dot com)
   3 //
   4 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   5 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 //
   7 // Official repository: https://github.com/boostorg/beast
   8 //
   9
  10 #ifndef BOOST_BEAST_TEST_THROUGHPUT_HPP
  11 #define BOOST_BEAST_TEST_THROUGHPUT_HPP
  12
  13 #include <chrono>
  14 #include <cstdint>
  15
  16 namespace boost {
  17 namespace beast {
  18 namespace test {
  19
  20 class timer
  21 {
  22     using clock_type =
  23         std::chrono::system_clock;
  24
  25     clock_type::time_point when_;
  26
  27 public:
  28     using duration =
  29         clock_type::duration;
  30
  31     timer()
  32         : when_(clock_type::now())
  33     {
  34     }
  35
  36     duration
  37     elapsed() const
  38     {
  39         return clock_type::now() - when_;
  40     }
  41 };
  42
  43 inline
  44 std::uint64_t
  45 throughput(std::chrono::duration<
  46     double> const& elapsed, std::uint64_t items)
  47 {
  48     using namespace std::chrono;
  49     return static_cast<std::uint64_t>(
  50         1 / (elapsed/items).count());
  51 }
  52
  53 } // test
  54 } // beast
  55 } // boost
  56
  57 #endif