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	double time_dt();			double time_dt();

	/* Sleep for the specified number of seconds */			/* Sleep for the specified number of seconds */

	void time_sleep(double t);			void time_sleep(double t);

	class scoped_timer {			class scoped_timer {
	public:			public:
	explicit scoped_timer(double *value) : value_(value)			explicit scoped_timer(double *value = NULL) : value_(value)
	{			{
	time_start_ = time_dt();			time_start_ = time_dt();
	}			}

	~scoped_timer()			~scoped_timer()
	{			{
	if(value_ != NULL) {			if(value_ != NULL) {
	*value_ = time_dt() - time_start_;			*value_ = time_dt() - time_start_;
	}			}
	}			}

				double get_start() const
				{
				return time_start_;
				}

	protected:			protected:
	double *value_;			double *value_;
	double time_start_;			double time_start_;
	};			};

	CCL_NAMESPACE_END			CCL_NAMESPACE_END

	#endif			#endif