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