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/* StarPU --- Runtime system for heterogeneous multicore architectures.
*
* Copyright (C) 2011-2013 Inria
* Copyright (C) 2010-2013,2015 CNRS
* Copyright (C) 2009-2010,2013-2015 Université de Bordeaux
*
* 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.
*/
/*
* This is an example of using a callback. We submit a task, whose callback
* submits another task (without any callback).
*/
#include <starpu.h>
#define FPRINTF(ofile, fmt, ...) do { if (!getenv("STARPU_SSILENT")) {fprintf(ofile, fmt, ## __VA_ARGS__); }} while(0)
starpu_data_handle_t handle;
void cpu_codelet(void *descr[], STARPU_ATTRIBUTE_UNUSED void *_args)
{
int *val = (int *)STARPU_VARIABLE_GET_PTR(descr[0]);
*val += 1;
}
struct starpu_codelet cl =
{
.modes = { STARPU_RW },
.cpu_funcs = {cpu_codelet},
.cpu_funcs_name = {"cpu_codelet"},
.nbuffers = 1,
.name = "callback"
};
void callback_func(void *callback_arg)
{
int ret;
struct starpu_task *task = starpu_task_create();
task->cl = &cl;
task->handles[0] = handle;
ret = starpu_task_submit(task);
STARPU_CHECK_RETURN_VALUE(ret, "starpu_task_submit");
}
int main(int argc, char **argv)
{
int v=40;
int ret;
ret = starpu_init(NULL);
if (ret == -ENODEV)
return 77;
STARPU_CHECK_RETURN_VALUE(ret, "starpu_init");
starpu_variable_data_register(&handle, STARPU_MAIN_RAM, (uintptr_t)&v, sizeof(int));
struct starpu_task *task = starpu_task_create();
task->cl = &cl;
task->callback_func = callback_func;
task->callback_arg = NULL;
task->handles[0] = handle;
ret = starpu_task_submit(task);
if (ret == -ENODEV) goto enodev;
STARPU_CHECK_RETURN_VALUE(ret, "starpu_task_submit");
starpu_task_wait_for_all();
starpu_data_unregister(handle);
FPRINTF(stderr, "v -> %d\n", v);
starpu_shutdown();
return (v == 42) ? 0 : 1;
enodev:
starpu_shutdown();
return 77;
}
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