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/*
* Pseudospectral 2nd order 2D linear PDE solver
* Copyright (C) 2016 Anton Khirnov <anton@khirnov.net>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef MS_PSSOLVE_H
#define MS_PSSOLVE_H
#include "common.h"
#if HAVE_OPENCL
#include <cl.h>
#else
typedef void* cl_context;
typedef void* cl_command_queue;
#endif
#include <stdint.h>
#include "basis.h"
enum PSSolveDiffOrder {
PSSOLVE_DIFF_ORDER_00,
PSSOLVE_DIFF_ORDER_10,
PSSOLVE_DIFF_ORDER_01,
PSSOLVE_DIFF_ORDER_11,
PSSOLVE_DIFF_ORDER_20,
PSSOLVE_DIFF_ORDER_02,
PSSOLVE_DIFF_ORDER_NB,
};
typedef struct PSSolvePriv PSSolvePriv;
typedef struct PSSolveContext {
/**
* Solver private data, not to be touched by the caller.
*/
PSSolvePriv *priv;
/**
* The basis sets to be used in each direction.
* Set by the caller before ms_pssolve_context_init().
*/
const BasisSet *basis[2];
/**
* Order of the solver in each direction.
* Set by the caller before ms_pssolve_context_init().
*/
int solve_order[2];
/**
* Locations of the collocation points in each direction. The equation
* coefficients passed to ms_pssolve_solve() should be evaluated at those
* grid positions.
*
* Set by the solver after ms_pssolve_context_init(). Each array is
* solve_order[i]-sized.
*/
double *colloc_grid[2];
cl_context ocl_ctx;
cl_command_queue ocl_queue;
uint64_t lu_solves_count;
uint64_t lu_solves_time;
uint64_t cg_solve_count;
uint64_t cg_iter_count;
uint64_t cg_time_total;
uint64_t construct_matrix_count;
uint64_t construct_matrix_time;
} PSSolveContext;
/**
* Allocate a new solver.
*/
int ms_pssolve_context_alloc(PSSolveContext **ctx);
/**
* Initialize the solver for use after all the context options have been set.
*/
int ms_pssolve_context_init(PSSolveContext *ctx);
/**
* Free the solver and all its internal state.
*/
void ms_pssolve_context_free(PSSolveContext **ctx);
/**
* Solve a second order linear PDE in 2D with a pseudospectral method.
*
* @param eq_coeffs the coefficients of each derivative term at the collocation
* points.
* @param rhs the right-hand side of the equation at the collocation points.
* @param coeffs the spectral coefficients of the solution will be written here.
*/
int ms_pssolve_solve(PSSolveContext *ctx,
const double * const eq_coeffs[PSSOLVE_DIFF_ORDER_NB],
const double *rhs, double *coeffs);
#endif /* MS_PSSOLVE_H */
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