mirror of https://github.com/facebook/rocksdb.git
73 lines
2.1 KiB
C++
73 lines
2.1 KiB
C++
// Portions Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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// borrowed from
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// http://www.crazygaze.com/blog/2016/03/24/portable-c-timer-queue/
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// Timer Queue
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//
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// License
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//
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// The source code in this article is licensed under the CC0 license, so feel
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// free
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// to copy, modify, share, do whatever you want with it.
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// No attribution is required, but Ill be happy if you do.
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// CC0 license
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// The person who associated a work with this deed has dedicated the work to the
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// public domain by waiving all of his or her rights to the work worldwide
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// under copyright law, including all related and neighboring rights, to the
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// extent allowed by law. You can copy, modify, distribute and perform the
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// work, even for
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// commercial purposes, all without asking permission. See Other Information
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// below.
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//
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#include "util/timer_queue.h"
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#include <future>
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namespace Timing {
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using Clock = std::chrono::high_resolution_clock;
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double now() {
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static auto start = Clock::now();
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return std::chrono::duration<double, std::milli>(Clock::now() - start)
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.count();
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}
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} // namespace Timing
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int main() {
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TimerQueue q;
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double tnow = Timing::now();
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q.add(10000, [tnow](bool aborted) mutable {
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printf("T 1: %d, Elapsed %4.2fms\n", aborted, Timing::now() - tnow);
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return std::make_pair(false, 0);
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});
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q.add(10001, [tnow](bool aborted) mutable {
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printf("T 2: %d, Elapsed %4.2fms\n", aborted, Timing::now() - tnow);
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return std::make_pair(false, 0);
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});
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q.add(1000, [tnow](bool aborted) mutable {
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printf("T 3: %d, Elapsed %4.2fms\n", aborted, Timing::now() - tnow);
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return std::make_pair(!aborted, 1000);
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});
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auto id = q.add(2000, [tnow](bool aborted) mutable {
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printf("T 4: %d, Elapsed %4.2fms\n", aborted, Timing::now() - tnow);
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return std::make_pair(!aborted, 2000);
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});
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(void)id;
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// auto ret = q.cancel(id);
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// assert(ret == 1);
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// q.cancelAll();
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return 0;
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}
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//////////////////////////////////////////
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