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1 // -*- C++ -*-
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2
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3 // Copyright (C) 2018-2020 Free Software Foundation, Inc.
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4
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5 // This library is free software; you can redistribute it and/or
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6 // modify it under the terms of the GNU General Public License as
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7 // published by the Free Software Foundation; either version 3, or (at
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8 // your option) any later version.
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9
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10 // This library is distributed in the hope that it will be useful, but
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11 // WITHOUT ANY WARRANTY; without even the implied warranty of
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12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 // General Public License for more details.
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14
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15 // You should have received a copy of the GNU General Public License
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16 // along with this library; see the file COPYING3. If not see
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17 // <http://www.gnu.org/licenses/>.
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18
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19
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20 // A clock that ticks at a third of the speed of system_clock that can be used
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21 // to ensure that functions with timeouts don't erroneously return early.
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22
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23 #include <chrono>
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24
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25 struct slow_clock
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26 {
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27 using rep = std::chrono::system_clock::rep;
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28 using period = std::chrono::system_clock::period;
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29 using duration = std::chrono::system_clock::duration;
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30 using time_point = std::chrono::time_point<slow_clock, duration>;
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31 static constexpr bool is_steady = false;
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32
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33 static time_point now()
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34 {
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35 auto real = std::chrono::system_clock::now();
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36 return time_point{real.time_since_epoch() / 3};
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37 }
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38 };
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