/* StarPU --- Runtime system for heterogeneous multicore architectures.
 *
 * Copyright (C) 2010, 2011, 2012, 2013  Centre National de la Recherche Scientifique
 *
 * StarPU is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or (at
 * your option) any later version.
 *
 * StarPU 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 Lesser General Public License in COPYING.LGPL for more details.
 */

#include <config.h>
#include <starpu.h>
#include "../helper.h"

void cpu_codelet(void *descr[], STARPU_ATTRIBUTE_UNUSED void *_args)
{
	int *valin = (int *)STARPU_VARIABLE_GET_PTR(descr[0]);
	int *valout = (int *)STARPU_VARIABLE_GET_PTR(descr[1]);

	*valout = *valin;
}

void cpu2_codelet(void *descr[], STARPU_ATTRIBUTE_UNUSED void *_args)
{
	int *valin = (int *)STARPU_VARIABLE_GET_PTR(descr[0]);
	int *valout = (int *)STARPU_VARIABLE_GET_PTR(descr[1]);

	*valout = *valin*2;
}

struct starpu_codelet cl_cpu_funcs =
{
	.where = STARPU_CPU,
	.cpu_funcs = {cpu_codelet, NULL},
	.nbuffers = 2,
	.name = "cpu_funcs",
};

struct starpu_codelet cl_cpu_func =
{
	.where = STARPU_CPU,
	.cpu_func = cpu_codelet,
	.nbuffers = 2,
	.name = "cpu_func",
};

struct starpu_codelet cl_cpu_multiple =
{
	.where = STARPU_CPU,
	.cpu_func = STARPU_MULTIPLE_CPU_IMPLEMENTATIONS,
	.cpu_funcs = {cpu_codelet, NULL},
	.nbuffers = 2,
	.name = "cpu_multiple",
};

struct starpu_codelet cl_cpu_func_funcs =
{
	.where = STARPU_CPU,
	.cpu_func = cpu2_codelet,
	.cpu_funcs = {cpu_codelet, NULL},
	.nbuffers = 2,
	.name = "cpu_func_funcs",
};

int submit_codelet(struct starpu_codelet cl, int where)
{
	int x=42, y=14;
	starpu_data_handle_t handles[2];
	int ret;

	starpu_variable_data_register(&handles[0], 0, (uintptr_t)&x, sizeof(x));
	starpu_variable_data_register(&handles[1], 0, (uintptr_t)&y, sizeof(y));

	cl.where = where;
	ret = starpu_insert_task(&cl,
				 STARPU_R, handles[0],
				 STARPU_W, handles[1],
				 0);
	if (ret == -ENODEV)
	{
		FPRINTF(stderr, "cannot execute codelet <%s> with where=%d\n", cl.name, where);
		starpu_data_unregister(handles[0]);
		starpu_data_unregister(handles[1]);
		return ret;
	}

	starpu_task_wait_for_all();

	starpu_data_unregister(handles[0]);
	starpu_data_unregister(handles[1]);

	if (x != y)
	{
		FPRINTF(stderr, "error when executing codelet <%s> with where=%d\n", cl.name, where);
	}
	else
	{
		FPRINTF(stderr, "success when executing codelet <%s> with where=%d\n", cl.name, where);
	}
	return (x != y);
}

int main(int argc, char **argv)
{
	int ret;
	unsigned where;

	ret = starpu_init(NULL);
	if (ret == -ENODEV) return STARPU_TEST_SKIPPED;
	STARPU_CHECK_RETURN_VALUE(ret, "starpu_init");

	for(where=0 ; where<=STARPU_CPU ; where+=STARPU_CPU)
	{
		ret = submit_codelet(cl_cpu_func, where);
		if (ret == -ENODEV)
		{
			starpu_shutdown();
			fprintf(stderr, "WARNING: No one can execute this task\n");
			return STARPU_TEST_SKIPPED;
		}

		if (!ret)
		{
			ret = submit_codelet(cl_cpu_funcs, where);
		}
		if (!ret)
		{
			ret = submit_codelet(cl_cpu_multiple, where);
		}
		if (!ret)
		{
			ret = submit_codelet(cl_cpu_func_funcs, where);
		}
	}

	starpu_shutdown();

	STARPU_RETURN(ret);
}
