starpu-max/tests/datawizard/task_with_multiple_time_the_same_handle.c

/* StarPU --- Runtime system for heterogeneous multicore architectures.
 *
 * Copyright (C) 2015-2020  Université de Bordeaux, CNRS (LaBRI UMR 5800), Inria
 *
 * 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 "../helper.h"

/*
 * Test passing the same handle several times to the same task
 */

void sum_cpu(void * descr[], void *cl_arg)
{
	(void)cl_arg;
	double * v_dst = (double *) STARPU_VARIABLE_GET_PTR(descr[0]);
	double * v_src = (double *) STARPU_VARIABLE_GET_PTR(descr[1]);
	*v_dst+=*v_src;
}

void sum3_cpu(void * descr[], void *cl_arg)
{
	(void)cl_arg;
	double * v_src1 = (double *) STARPU_VARIABLE_GET_PTR(descr[1]);
	double * v_src2 = (double *) STARPU_VARIABLE_GET_PTR(descr[1]);
	double * v_dst = (double *) STARPU_VARIABLE_GET_PTR(descr[0]);
	*v_dst+=*v_src1+*v_src2;
}

static struct starpu_codelet sum_cl =
{
	.cpu_funcs = {sum_cpu},
	.cpu_funcs_name = {"sum_cpu"},
	.nbuffers = 2,
	.modes={STARPU_RW,STARPU_R}
};

static struct starpu_codelet sum3_cl =
{
	.cpu_funcs = {sum3_cpu},
	.cpu_funcs_name = {"sum3_cpu"},
	.nbuffers = 3,
	.modes={STARPU_R,STARPU_R,STARPU_RW}
};

int main(void)
{
	starpu_data_handle_t handle;
	int ret = 0;
	double value=1.0;
	int i;

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

	starpu_variable_data_register(&handle,0,(uintptr_t)&value,sizeof(double));

	for (i=0; i<2; i++)
	{
		ret = starpu_task_insert(&sum_cl,
		                   STARPU_RW, handle,
		                   STARPU_R, handle,
		                   0);
		if (ret == -ENODEV) goto enodev;
		ret = starpu_task_insert(&sum3_cl,
		                   STARPU_R, handle,
		                   STARPU_R, handle,
		                   STARPU_RW, handle,
		                   0);
		if (ret == -ENODEV) goto enodev;
	}

	starpu_task_wait_for_all();
	starpu_data_unregister(handle);
	if (value != 36)
	{
		FPRINTF(stderr, "value is %f instead of %f\n", value, 36.);
		ret = EXIT_FAILURE;
	}

	starpu_shutdown();
	return ret;

enodev:
	starpu_data_unregister(handle);
	starpu_shutdown();
	return STARPU_TEST_SKIPPED;
}