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 	Thread.h - An runnable object
	Thread is responsable for holding the "action" for something,
	also, it responds if it "should" or "should not" run, based on
	the current time;
	For instructions, go to https://github.com/ivanseidel/ArduinoThread
	Created by Ivan Seidel Gomes, March, 2013.
	Released into the public domain.
#ifndef Thread_h
#define Thread_h
#if defined(ARDUINO) && ARDUINO >= 100
	#include <Arduino.h>
	#include <WProgram.h>
#include <inttypes.h>
	Uncomment this line to enable ThreadName Strings.
	It might be usefull if you are loging thread with Serial,
	or displaying a list of threads...
// #define USE_THREAD_NAMES	1
class Thread{
	// Desired interval between runs
	unsigned long interval;
	// Last runned time in Ms
	unsigned long last_run;
	// Scheduled run in Ms (MUST BE CACHED)	
	unsigned long _cached_next_run;
		IMPORTANT! Run after all calls to run()
		Updates last_run and cache next run.
		NOTE: This MUST be called if extending
		this class and implementing run() method
	void runned(unsigned long time);
	// Default is to mark it runned "now"
	void runned() { runned(millis()); }
	// Callback for run() if not implemented
	void (*_onRun)(void);		
	// If the current Thread is enabled or not
	bool enabled;
	// ID of the Thread (initialized from memory adr.)
	int ThreadID;
	#ifdef USE_THREAD_NAMES
		// Thread Name (used for better UI).
		String ThreadName;			
	Thread(void (*callback)(void) = NULL, unsigned long _interval = 0);
	// Set the desired interval for calls, and update _cached_next_run
	virtual void setInterval(unsigned long _interval);
	// Return if the Thread should be runned or not
	virtual bool shouldRun(unsigned long time);
	// Default is to check whether it should run "now"
	bool shouldRun() { return shouldRun(millis()); }
	// Callback set
	void onRun(void (*callback)(void));
	// Runs Thread
	virtual void run();

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