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include
starpu_rand.h
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/* StarPU --- Runtime system for heterogeneous multicore architectures.
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*
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* Copyright (C) 2012, 2013 Centre National de la Recherche Scientifique
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*
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* StarPU is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or (at
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* your option) any later version.
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*
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* StarPU is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* See the GNU Lesser General Public License in COPYING.LGPL for more details.
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*/
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#ifndef __STARPU_RAND_H__
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#define __STARPU_RAND_H__
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#include <stdlib.h>
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#include <
starpu_config.h
>
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#ifdef __cplusplus
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extern
"C"
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{
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#endif
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#ifdef STARPU_SIMGRID
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/* In simgrid mode, force using seed 0 by default to get reproducible behavior by default */
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#define starpu_seed(seed) starpu_get_env_number_default("STARPU_RAND_SEED", 0)
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#else
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#define starpu_seed(seed) starpu_get_env_number_default("STARPU_RAND_SEED", (seed))
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#endif
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#ifdef STARPU_USE_DRAND48
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# define starpu_srand48(seed) srand48(starpu_seed(seed))
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# define starpu_drand48() drand48()
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# define starpu_erand48(xsubi) erand48(xsubi)
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# ifdef STARPU_USE_ERAND48_R
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typedef
struct
drand48_data starpu_drand48_data;
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# define starpu_srand48_r(seed, buffer) srand48_r(starpu_seed(seed), buffer)
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# define starpu_erand48_r(xsubi, buffer, result) erand48_r(xsubi, buffer, result)
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#else
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typedef
int
starpu_drand48_data;
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# define starpu_srand48_r(seed, buffer) srand48(starpu_seed(seed))
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# define starpu_erand48_r(xsubi, buffer, result) do {*(result) = erand48(xsubi); } while (0)
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# endif
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#else
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typedef
int
starpu_drand48_data;
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# define starpu_srand48(seed) srand(starpu_seed(seed))
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# define starpu_drand48() (double)(rand()) / RAND_MAX
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# define starpu_erand48(xsubi) starpu_drand48()
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# define starpu_srand48_r(seed, buffer) srand(starpu_seed(seed))
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# define starpu_erand48_r(xsubi, buffer, result) do {*(result) = ((double)(rand()) / RAND_MAX);} while (0)
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
/* __STARPU_RAND_H__ */
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