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construct/include/ircd/js/timer.h
2017-08-23 15:04:45 -06:00

65 lines
2.1 KiB
C++

/*
* Copyright (C) 2016 Charybdis Development Team
* Copyright (C) 2016 Jason Volk <jason@zemos.net>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice is present in all copies.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#define HAVE_IRCD_JS_TIMER_H
namespace ircd {
namespace js {
struct timer
{
using steady_clock = std::chrono::steady_clock;
using time_point = steady_clock::time_point;
using callback = std::function<void () noexcept>;
private:
struct state
{
uint32_t sem;
bool running;
};
std::mutex mutex;
std::condition_variable cond;
bool finished;
callback timeout;
time_point started;
std::atomic<microseconds> limit;
std::atomic<struct state> state;
void handle(std::unique_lock<std::mutex> &lock);
void worker();
std::thread thread; //TODO: single extern thread plz
public:
void set(const microseconds &limit); // Set the time limit (only when not started)
void set(const callback &timeout); // Set the callback (only when not started)
bool cancel(); // Cancel (stop) the timer
time_point start(); // Start the timer
timer(const callback &timeout);
~timer() noexcept;
};
} // namespace js
} // namespace timer