97 lines
2.2 KiB
C++
97 lines
2.2 KiB
C++
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/* Copyright 2016, Ableton AG, Berlin. All rights reserved.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* If you would like to incorporate Link into a proprietary software application,
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* please contact <link-devs@ableton.com>.
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*/
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#pragma once
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#include <chrono>
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#include <functional>
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namespace ableton
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{
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namespace util
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{
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namespace test
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{
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struct Timer
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{
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using ErrorCode = int;
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using TimePoint = std::chrono::system_clock::time_point;
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// Initialize timer with an arbitrary large value to simulate the
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// time_since_epoch of a real clock.
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Timer()
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: mNow{std::chrono::milliseconds{123456789}}
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{
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}
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void expires_at(std::chrono::system_clock::time_point t)
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{
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cancel();
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mFireAt = std::move(t);
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}
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template <typename T, typename Rep>
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void expires_from_now(std::chrono::duration<T, Rep> duration)
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{
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cancel();
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mFireAt = now() + duration;
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}
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ErrorCode cancel()
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{
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if (mHandler)
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{
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mHandler(1); // call existing handler with truthy error code
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}
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mHandler = nullptr;
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return 0;
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}
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template <typename Handler>
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void async_wait(Handler handler)
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{
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mHandler = [handler](ErrorCode ec) { handler(ec); };
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}
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std::chrono::system_clock::time_point now() const
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{
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return mNow;
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}
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template <typename T, typename Rep>
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void advance(std::chrono::duration<T, Rep> duration)
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{
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mNow += duration;
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if (mHandler && mFireAt < mNow)
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{
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mHandler(0);
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mHandler = nullptr;
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}
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}
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std::function<void(ErrorCode)> mHandler;
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std::chrono::system_clock::time_point mFireAt;
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std::chrono::system_clock::time_point mNow;
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};
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} // namespace test
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} // namespace util
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} // namespace ableton
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