scheduler.h

VIGASOCO (VIdeo GAmes SOurce COde) Windows port (v0.01)

// Scheduler.h
//
//	Maintains internal timers and executes scheduled tasks
//
//	Notes:
//		timerChangesLastFrame is the key to execute scheduled tasks.
//		It stores the number of counter limit changes this frame (relative to
//		initial game time). Its value can be:
//			0x1 -> 1 hundredth of a second
//			0x2 -> 10 hundredths of a second
//			0x3 -> 1 second
//			0x4 -> 10 seconds
//			0x5 -> 1 minute
//			0x6 -> 10 minutes
//			0x7 -> 1 hour
//			0x8 -> 10 hours
//			0x9 -> 100 hours
//
//		Note that when a task is scheduled, the time it takes to be excuted
//		it's not 100% accurate, because it depends on the initial game time.
//
/////////////////////////////////////////////////////////////////////////////

#ifndef _SCHEDULER_H_
#define _SCHEDULER_H_


#include <list>
#include "../util/Singleton.h"
#include "Task.h"

#define theScheduler Scheduler::getSingletonPtr()

class Scheduler : public Singleton<Scheduler>
{
// types
protected:
	typedef std::list<Task *> TasksList;

// fields
protected:
	// tasks
	TasksList tasksList;

	// internal timer
	enum timerValues {
		HUNDREDTHS = 0,
		SECONDS = 1,
		MINUTES = 2,
		HOURS = 3
	};
	int internalTimer[4];
	int timerChangesLastFrame;

// methods
public:
	void updateInternalTimers();
	void executeScheduledTasks();
	void addScheduledTask(Task *t);

	// initialization and cleanup
	Scheduler();
	~Scheduler();
};

#endif	// _SCHEDULER_H_