/* StarPU --- Runtime system for heterogeneous multicore architectures.
 *
 * Copyright (C) 2009, 2010-2011  Université de Bordeaux 1
 * Copyright (C) 2010, 2011, 2012  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 <starpu.h>
#include <pthread.h>
#include <sys/time.h>

static unsigned niter = 50;
#define FPRINTF(ofile, fmt, args ...) do { if (!getenv("STARPU_SSILENT")) {fprintf(ofile, fmt, ##args); }} while(0)

#warning todo: fix cuda and opencl
//#ifdef STARPU_USE_CUDA
//extern void cuda_codelet(void *descr[], __attribute__ ((unused)) void *_args);
//#endif

//#ifdef STARPU_USE_OPENCL
//#include <starpu_opencl.h>
//extern void opencl_codelet(void *descr[], __attribute__ ((unused)) void *_args);
//struct starpu_opencl_program opencl_program;
//#endif

void cpu_codelet(void *descr[], __attribute__ ((unused)) void *_args)
{
	float *val = (float *)STARPU_VECTOR_GET_PTR(descr[0]);

	val[0] += 1.0f; val[1] += 1.0f;
}

int main(int argc, char **argv)
{
	int ret = 0;

	ret = starpu_init(NULL);
	STARPU_CHECK_RETURN_VALUE(ret, "starpu_init");

	float float_array[4] __attribute__ ((aligned (16))) = { 0.0f, 0.0f, 0.0f, 0.0f};

	starpu_data_handle_t float_array_handle;
	starpu_vector_data_register(&float_array_handle, 0 /* home node */,
			(uintptr_t)&float_array, 4, sizeof(float));

//#ifdef STARPU_USE_OPENCL
//        ret = starpu_opencl_load_opencl_from_file("examples/incrementer/incrementer_kernels_opencl_kernel.cl", &opencl_program, NULL);
//	STARPU_CHECK_RETURN_VALUE(ret, "starpu_opencl_load_opencl_from_file");
//#endif

        struct starpu_codelet cl;
        starpu_codelet_init(&cl);
        cl.where = STARPU_CPU;//|STARPU_CUDA;//|STARPU_OPENCL,
        cl.cpu_funcs[0] = cpu_codelet;
        cl.cpu_funcs[1] = NULL;
//#ifdef STARPU_USE_CUDA
//        cl.cuda_funcs[0] = cuda_codelet;
//        cl.cuda_funcs[1] = NULL;
//#endif
//#ifdef STARPU_USE_OPENCL
//		.opencl_funcs = {opencl_codelet, NULL},
//#endif
        cl.nbuffers = 1;
        cl.modes[0] = STARPU_RW;

	unsigned i;
	for (i = 0; i < niter; i++)
	{
		struct starpu_task *task = starpu_task_create();
                task->cl = &cl;
                task->handles[0] = float_array_handle;

                ret = starpu_task_submit(task);
                if (STARPU_UNLIKELY(ret == -ENODEV))
                {
                    FPRINTF(stderr, "No worker may execute this task\n");
                    exit(0);
                }
        }

	starpu_task_wait_for_all();

	/* update the array in RAM */
	starpu_data_unregister(float_array_handle);

	FPRINTF(stderr, "array -> %f, %f, %f, %f\n", float_array[0],
                float_array[1], float_array[2], float_array[3]);

	if (float_array[0] != niter || float_array[0] != float_array[1] + float_array[2] + float_array[3])
	{
		FPRINTF(stderr, "Incorrect result\n");
		ret = 1;
	}

	starpu_shutdown();

	return ret;
}