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/* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
#ifndef TIMER_H
#define TIMER_H
#include "base/i2-base.hpp"
#include <boost/signals2.hpp>
#include <memory>
namespace icinga {
class TimerHolder;
/**
* A timer that periodically triggers an event.
*
* @ingroup base
*/
class Timer final
{
public:
typedef std::shared_ptr<Timer> Ptr;
static Ptr Create();
~Timer();
static void Initialize();
static void Uninitialize();
static void InitializeThread();
static void UninitializeThread();
void SetInterval(double interval);
double GetInterval() const;
static void AdjustTimers(double adjustment);
void Start();
void Stop(bool wait = false);
void Reschedule(double next = -1);
double GetNext() const;
boost::signals2::signal<void(const Timer * const&)> OnTimerExpired;
private:
double m_Interval{0}; /**< The interval of the timer. */
double m_Next{0}; /**< When the next event should happen. */
bool m_Started{false}; /**< Whether the timer is enabled. */
bool m_Running{false}; /**< Whether the timer proc is currently running. */
std::weak_ptr<Timer> m_Self;
Timer() = default;
void Call();
void InternalReschedule(bool completed, double next = -1);
void InternalRescheduleUnlocked(bool completed, double next = -1);
static void TimerThreadProc();
friend class TimerHolder;
};
}
#endif /* TIMER_H */
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