double_buffer.cc
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			/* -------------------------------------------------------------------------- */
			#include "double_buffer.hh"
			#include "grid.hh"
			/* -------------------------------------------------------------------------- */

			/* -------------------------------------------------------------------------- */
			DoubleBuffer::DoubleBuffer(int m, int n)
			: m_current(new Grid(m, n)), m_old(new Grid(m, n)) {}

			/* -------------------------------------------------------------------------- */
			Grid & DoubleBuffer::current() { return *m_current; }

			/* -------------------------------------------------------------------------- */
			Grid & DoubleBuffer::old() { return *m_old; }

			/* -------------------------------------------------------------------------- */
			void DoubleBuffer::swap() {
			m_current.swap(m_old);
			}

phys-743-exercises/poisson/double_buffer.ccc93c004e4f0esolutions