Line data    Source code

       1             : 
       2             : /* Copyright (c) 2014, Stefan.Eilemann@epfl.ch
       3             :  *
       4             :  * This file is part of Lunchbox <https://github.com/Eyescale/Lunchbox>
       5             :  *
       6             :  * This library is free software; you can redistribute it and/or modify it under
       7             :  * the terms of the GNU Lesser General Public License version 2.1 as published
       8             :  * by the Free Software Foundation.
       9             :  *
      10             :  * This library is distributed in the hope that it will be useful, but WITHOUT
      11             :  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
      12             :  * FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
      13             :  * details.
      14             :  *
      15             :  * You should have received a copy of the GNU Lesser General Public License
      16             :  * along with this library; if not, write to the Free Software Foundation, Inc.,
      17             :  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
      18             :  */
      19             : 
      20             : #define BOOST_TEST_MODULE Future
      21             : 
      22             : #include <lunchbox/clock.h>
      23             : #include <lunchbox/readyFuture.h>
      24             : #include <boost/test/unit_test.hpp>
      25             : 
      26           3 : BOOST_AUTO_TEST_CASE( readyFutures )
      27             : {
      28           1 :     lunchbox::f_bool_t ok = lunchbox::makeTrueFuture();
      29           1 :     BOOST_CHECK( ok == true );
      30           1 :     BOOST_CHECK( ok.isReady( ));
      31             : 
      32           2 :     lunchbox::f_bool_t nok = lunchbox::makeFalseFuture();
      33           1 :     BOOST_CHECK( nok == false );
      34           2 :     BOOST_CHECK( nok.isReady( ));
      35           1 : }
      36             : 
      37     2000000 : static lunchbox::f_bool_t futureFunction()
      38             : {
      39     2000000 :     return lunchbox::makeTrueFuture();;
      40             : }
      41             : 
      42     1000000 : static bool presentFunction()
      43             : {
      44     1000000 :     return true;
      45             : }
      46             : 
      47           3 : BOOST_AUTO_TEST_CASE( perfFuture )
      48             : {
      49             :     static const size_t nLoops = 1000000;
      50             : 
      51           1 :     lunchbox::Clock clock;
      52     1000001 :     for( size_t i = 0; i < nLoops; ++i )
      53     1000000 :         futureFunction();
      54           1 :     const float futureSync = clock.resetTimef();
      55             : 
      56           2 :     std::vector< lunchbox::f_bool_t > futures;
      57           1 :     futures.reserve( nLoops );
      58     1000001 :     for( size_t i = 0; i < nLoops; ++i )
      59     1000000 :         futures.push_back( futureFunction( ));
      60           1 :     futures.clear();
      61           1 :     const float futureASync = clock.resetTimef();
      62             : 
      63     1000001 :     for( size_t i = 0; i < nLoops; ++i )
      64     1000000 :         presentFunction();
      65           1 :     const float present = clock.resetTimef();
      66             : 
      67           1 :     std::cout << nLoops / futureSync / 1000.f << " sync futures, "
      68           2 :               << nLoops / futureASync / 1000.f << " async futures, "
      69           3 :               << nLoops / present / 1000.f << " normal calls/us" << std::endl;
      70           4 : }