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phys-743-exercises/poisson/double_buffer.hh
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double_buffer.hh
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			#ifndef DOUBLE_BUFFER
			#define DOUBLE_BUFFER

			/* -------------------------------------------------------------------------- */
			#include <memory>
			/* -------------------------------------------------------------------------- */
			#include "grid.hh"
			/* -------------------------------------------------------------------------- */

			class DoubleBuffer {
			public:
			DoubleBuffer(int m, int n);

			Grid & current();
			Grid & old();

			void swap();
			private:

			std::unique_ptr<Grid> m_current;
			std::unique_ptr<Grid> m_old;
			};

			#endif /* DOUBLE_BUFFER */