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/* StarPU --- Runtime system for heterogeneous multicore architectures.
*
* Copyright (C) 2009-2025 University of 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 <stdio.h>
#include <stdint.h>
#include <starpu.h>
void display_cpu_func(void *buffers[], void *cl_arg)
{
(void)cl_arg;
int nx, i;
struct starpu_vector_interface *vector;
int *val;
vector = (struct starpu_vector_interface *) buffers[0];
nx = STARPU_VECTOR_GET_NX(vector);
val = (int *)STARPU_VECTOR_GET_PTR(vector);
for (i = 0; i < nx; i++)
fprintf(stdout, "V[%d] = %d\n", i, val[i]);
}
void scal_cpu_func(void *buffers[], void *cl_arg)
{
int factor, nx, i;
struct starpu_vector_interface *vector;
int *val;
vector = (struct starpu_vector_interface *) buffers[0];
nx = STARPU_VECTOR_GET_NX(vector);
val = (int *)STARPU_VECTOR_GET_PTR(vector);
starpu_codelet_unpack_args(cl_arg, &factor);
for (i = 0; i < nx; i++)
val[i] *= factor;
}
void hello_cpu_func(void *buffers[], void *cl_arg)
{
(void)buffers;
int answer;
starpu_codelet_unpack_args(cl_arg, &answer);
fprintf(stdout, "Hello world, the answer is %d\n", answer);
}
struct starpu_codelet hello_codelet =
{
.cpu_funcs = {hello_cpu_func},
.cpu_funcs_name = {"hello_cpu_func"},
.nbuffers = 0,
.name = "hello"
};
struct starpu_codelet scal_codelet =
{
.cpu_funcs = {scal_cpu_func},
.cpu_funcs_name = {"scal_cpu_func"},
.nbuffers = 1,
.modes = {STARPU_RW},
.name = "scal"
};
struct starpu_codelet display_codelet =
{
.cpu_funcs = {display_cpu_func},
.cpu_funcs_name = {"display_cpu_func"},
.nbuffers = 1,
.modes = {STARPU_R},
.name = "display"
};
#define NX 5
int main(void)
{
int answer = 42;
int ret;
int vector[NX];
unsigned i;
starpu_data_handle_t vector_handle;
setenv("STARPU_FXT_TRACE", "1", 1);
ret = starpu_init(NULL);
if (ret == -ENODEV) return 77;
STARPU_CHECK_RETURN_VALUE(ret, "starpu_init");
for (i = 0; i < NX; i++)
vector[i] = i+1;
starpu_vector_data_register(&vector_handle, STARPU_MAIN_RAM, (uintptr_t)vector, NX, sizeof(vector[0]));
ret = starpu_task_insert(&hello_codelet,
STARPU_VALUE, &answer, sizeof(answer),
0);
if (ret == -ENODEV) goto enodev;
STARPU_CHECK_RETURN_VALUE(ret, "starpu_task_submit");
ret = starpu_task_insert(&scal_codelet,
STARPU_RW, vector_handle,
STARPU_VALUE, &answer, sizeof(answer),
0);
if (ret == -ENODEV) goto enodev;
STARPU_CHECK_RETURN_VALUE(ret, "starpu_task_submit");
ret = starpu_task_insert(&display_codelet,
STARPU_R, vector_handle,
0);
if (ret == -ENODEV) goto enodev;
STARPU_CHECK_RETURN_VALUE(ret, "starpu_task_submit");
starpu_data_unregister(vector_handle);
starpu_shutdown();
return 0;
enodev:
starpu_shutdown();
return 77;
}
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