starpu_rand.h
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/* StarPU --- Runtime system for heterogeneous multicore architectures.
*
* Copyright (C) 2012-2020 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.
*/
#ifndef __STARPU_RAND_H__
#define __STARPU_RAND_H__
#include <stdlib.h>
#include <starpu_config.h>
#ifdef __cplusplus
extern "C"
{
#endif
#ifdef STARPU_SIMGRID
/* In simgrid mode, force using seed 0 by default to get reproducible behavior by default */
#define starpu_seed(seed) starpu_get_env_number_default("STARPU_RAND_SEED", 0)
#else
#define starpu_seed(seed) starpu_get_env_number_default("STARPU_RAND_SEED", (seed))
#endif
#ifdef STARPU_USE_DRAND48
# define starpu_srand48(seed) srand48(starpu_seed(seed))
# define starpu_drand48() drand48()
# define starpu_lrand48() lrand48()
# define starpu_erand48(xsubi) erand48(xsubi)
# ifdef STARPU_USE_ERAND48_R
typedef struct drand48_data starpu_drand48_data;
# define starpu_srand48_r(seed, buffer) srand48_r(starpu_seed(seed), buffer)
# define starpu_drand48_r(buffer, result) drand48_r(buffer, result)
# define starpu_lrand48_r(buffer, result) lrand48_r(buffer, result)
# define starpu_erand48_r(xsubi, buffer, result) erand48_r(xsubi, buffer, result)
#else
typedef int starpu_drand48_data;
# define starpu_srand48_r(seed, buffer) srand48(starpu_seed(seed))
# define starpu_drand48_r(buffer, result) do {*(result) = drand48(); } while (0)
# define starpu_lrand48_r(buffer, result) do {*(result) = lrand48(); } while (0)
# define starpu_erand48_r(xsubi, buffer, result) do {(void) buffer; *(result) = erand48(xsubi); } while (0)
# endif
#else
typedef int starpu_drand48_data;
# define starpu_srand48(seed) srand(starpu_seed(seed))
# define starpu_drand48() (double)(rand()) / RAND_MAX
# define starpu_lrand48() rand()
# define starpu_erand48(xsubi) starpu_drand48()
# define starpu_srand48_r(seed, buffer) srand(starpu_seed(seed))
# define starpu_erand48_r(xsubi, buffer, result) do {(void) xsubi; (void) buffer; *(result) = ((double)(rand()) / RAND_MAX);} while (0)
#endif
#ifdef __cplusplus
}
#endif
#endif /* __STARPU_RAND_H__ */
starpu_config.h