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/* StarPU --- Runtime system for heterogeneous multicore architectures.
*
* Copyright (C) 2018-2025 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 <starpu.h>
#define FPRINTF(ofile, fmt, ...) do { if (!getenv("STARPU_SSILENT")) {fprintf(ofile, fmt, ## __VA_ARGS__); }} while(0)
void func(void *descr[], void *_args)
{
int *x = (int *)STARPU_VARIABLE_GET_PTR(descr[0]);
(void)_args;
*x *= 2;
}
struct starpu_codelet mycodelet =
{
.modes = { STARPU_RW },
.cpu_funcs = {func},
.cpu_funcs_name = {"func"},
.nbuffers = 1
};
struct starpu_codelet mycodelet_color =
{
.modes = { STARPU_RW },
.cpu_funcs = {func},
.cpu_funcs_name = {"func"},
.nbuffers = 1,
.color = 0x0000FF,
};
int main(void)
{
int value=42;
starpu_data_handle_t handle;
int ret;
ret = starpu_init(NULL);
if (ret == -ENODEV) goto enodev;
STARPU_CHECK_RETURN_VALUE(ret, "starpu_init");
starpu_variable_data_register(&handle, STARPU_MAIN_RAM, (uintptr_t)&value, sizeof(value));
// In the trace file, the following task should be green (executed on CPU)
ret = starpu_task_insert(&mycodelet, STARPU_RW, handle, STARPU_NAME, "mytask_green",
0);
if (STARPU_UNLIKELY(ret == -ENODEV))
{
starpu_data_unregister(handle);
goto enodev;
}
STARPU_CHECK_RETURN_VALUE(ret, "starpu_task_insert");
// In the trace file, the following task will be red as specified by STARPU_TASK_COLOR
ret = starpu_task_insert(&mycodelet, STARPU_RW, handle, STARPU_NAME, "mytask_red",
STARPU_TASK_COLOR, 0xFF0000,
0);
STARPU_CHECK_RETURN_VALUE(ret, "starpu_task_insert");
// In the trace file, the following task will be blue as specified by the field color of mycodelet_color
ret = starpu_task_insert(&mycodelet_color, STARPU_RW, handle, STARPU_NAME, "mytask_blue",
0);
STARPU_CHECK_RETURN_VALUE(ret, "starpu_task_insert");
starpu_task_wait_for_all();
starpu_data_unregister(handle);
starpu_shutdown();
return 0;
enodev:
return 77;
}
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