geqo_random.h File Reference

#include <math.h>
#include "optimizer/geqo.h"

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Functions
void	geqo_set_seed (PlannerInfo *root, double seed)
double	geqo_rand (PlannerInfo *root)
int	geqo_randint (PlannerInfo *root, int upper, int lower)

Function Documentation

geqo_rand()

double geqo_rand

(

PlannerInfo *

root

)

Definition at line 28 of file geqo_random.c.

{
    GeqoPrivateData *private = (GeqoPrivateData *) root->join_search_private;
 
    return pg_prng_double(&private->random_state);
}

References PlannerInfo::join_search_private, and pg_prng_double().

Referenced by linear_rand().

geqo_randint()

int geqo_randint	(	PlannerInfo *	root,
		int	upper,
		int	lower
	)

Definition at line 36 of file geqo_random.c.

{
    GeqoPrivateData *private = (GeqoPrivateData *) root->join_search_private;
 
    /*
     * In current usage, "lower" is never negative so we can just use
     * pg_prng_uint64_range directly.
     */
    return (int) pg_prng_uint64_range(&private->random_state, lower, upper);
}

References PlannerInfo::join_search_private, lower(), pg_prng_uint64_range(), and upper().

Referenced by edge_failure(), gimme_gene(), gimme_tour(), and init_tour().

geqo_set_seed()

void geqo_set_seed	(	PlannerInfo *	root,
		double	seed
	)

Definition at line 20 of file geqo_random.c.

{
    GeqoPrivateData *private = (GeqoPrivateData *) root->join_search_private;
 
    pg_prng_fseed(&private->random_state, seed);
}

References PlannerInfo::join_search_private, and pg_prng_fseed().

Referenced by geqo().