From: Florian Forster Date: Fri, 11 Jul 2008 11:10:05 +0000 (+0200) Subject: Import the initial code of the population library. X-Git-Url: https://git.octo.it/?p=libpopulation.git;a=commitdiff_plain;h=e32950174054cacacf4f6fdbe35269257a41e5a9 Import the initial code of the population library. --- e32950174054cacacf4f6fdbe35269257a41e5a9 diff --git a/AUTHORS b/AUTHORS new file mode 100644 index 0000000..e69de29 diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..623b625 --- /dev/null +++ b/COPYING @@ -0,0 +1,340 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. 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If this is what you want to do, use the GNU Library General +Public License instead of this License. diff --git a/ChangeLog b/ChangeLog new file mode 100644 index 0000000..e69de29 diff --git a/Makefile.am b/Makefile.am new file mode 100644 index 0000000..af437a6 --- /dev/null +++ b/Makefile.am @@ -0,0 +1 @@ +SUBDIRS = src diff --git a/NEWS b/NEWS new file mode 100644 index 0000000..e69de29 diff --git a/README b/README new file mode 100644 index 0000000..e69de29 diff --git a/configure.ac b/configure.ac new file mode 100644 index 0000000..56bfa5b --- /dev/null +++ b/configure.ac @@ -0,0 +1,30 @@ +AC_INIT(libpopulation, 0.0.1) +AC_CONFIG_SRCDIR(src/libpopulation.c) +AC_CONFIG_HEADERS(src/config.h) +AM_INIT_AUTOMAKE(dist-bzip2) +AC_LANG(C) + +AC_PREFIX_DEFAULT("/opt/libpopulation") + +# +# Check for programs/utilities +# +AC_PROG_CC +AC_PROG_CPP +AC_PROG_INSTALL +AC_PROG_LN_S +AC_PROG_MAKE_SET + +# +# configure libtool +# +AC_LIBTOOL_DLOPEN +AC_PROG_LIBTOOL +#AC_PROG_RANLIB + +# +# Checks for header files. +# +AC_HEADER_STDC + +AC_OUTPUT(Makefile src/Makefile) diff --git a/src/Makefile.am b/src/Makefile.am new file mode 100644 index 0000000..80cbdfb --- /dev/null +++ b/src/Makefile.am @@ -0,0 +1,10 @@ +AUTOMAKE_OPTIONS = foreign no-dependencies + +include_HEADERS = population.h + +lib_LTLIBRARIES = libpopulation.la + +libpopulation_la_LDFLAGS = -version-info 0:0:0 +libpopulation_la_LIBADD = -lm +libpopulation_la_SOURCES = populaton.h libpopulation.c + diff --git a/src/libpopulation.c b/src/libpopulation.c new file mode 100644 index 0000000..f92e125 --- /dev/null +++ b/src/libpopulation.c @@ -0,0 +1,324 @@ +/** + * libevolve - src/evolve.c + * Copyright (C) 2008 Florian octo Forster + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; only version 2 of the License is applicable. + * + * This program 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 + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + * Authors: + * Florian octo Forster + **/ + +/* + * First tell the compiler to stick to the C99 and POSIX standards as close as + * possible. + */ +#ifndef __STRICT_ANSI__ /* {{{ */ +# define __STRICT_ANSI__ +#endif + +#ifndef _ISOC99_SOURCE +# define _ISOC99_SOURCE +#endif + +#ifdef _POSIX_C_SOURCE +# undef _POSIX_C_SOURCE +#endif +#define _POSIX_C_SOURCE 200112L + +/* Single UNIX needed for strdup. */ +#if 0 +#ifdef _XOPEN_SOURCE +# undef _XOPEN_SOURCE +#endif +#define _XOPEN_SOURCE 500 +#endif + +#ifndef _REENTRANT +# define _REENTRANT +#endif + +#ifndef _THREAD_SAFE +# define _THREAD_SAFE +#endif + +#ifdef _GNU_SOURCE +# undef _GNU_SOURCE +#endif +/* }}} */ + +#include "config.h" +#include "population.h" + +#include +#include +#include +#include +#include +#include +#include +#include + +/* + * Data types + */ +struct population_s +{ + pthread_mutex_t lock; + + /* Callback functions */ + pi_rate_f rate; + pi_free_f free; + pi_copy_f copy; + + void **individuals; + size_t individuals_num; +}; + +/* + * Constructor and destructor + */ +population_t *population_create (pi_rate_f rate, pi_copy_f copy, /* {{{ */ + pi_free_f f) +{ + population_t *p; + + p = (population_t *) malloc (sizeof (population_t)); + if (p == NULL) + return (NULL); + + memset (p, 0, sizeof (*p)); + pthread_mutex_init (&p->lock, /* attr = */ NULL); + + p->rate = rate; + p->copy = copy; + p->free = f; + + p->individuals = (void **) malloc (32 * sizeof (void *)); + if (p->individuals == NULL) + { + free (p); + return (NULL); + } + memset (p->individuals, 0, 32 * sizeof (void *)); + p->individuals_num = 32; + + return (p); +} /* }}} population_t *population_create */ + +void population_destroy (population_t *p) /* {{{ */ +{ + if (p == NULL) + return; + + if (p->individuals_num > 0) + { + size_t i; + + for (i = 0; i < p->individuals_num; i++) + { + p->free (p->individuals[i]); + p->individuals[i] = NULL; + } + + free (p->individuals); + p->individuals = NULL; + p->individuals_num = 0; + } + + memset (p, 0, sizeof (*p)); + free (p); +} /* }}} void population_destroy */ + +int population_set_size (population_t *p, /* {{{ */ + size_t population_size) +{ + size_t i; + void **temp; + + if (p == NULL) + return (-1); + + pthread_mutex_lock (&p->lock); + + if (p->individuals_num == population_size) + { + pthread_mutex_unlock (&p->lock); + return (0); + } + + for (i = population_size; i < p->individuals_num; i++) + { + p->free (p->individuals[i]); + p->individuals[i] = NULL; + } + + temp = (void **) realloc (p->individuals, population_size * sizeof (void *)); + if (temp == NULL) + { + pthread_mutex_unlock (&p->lock); + return (-1); + } + p->individuals = temp; + + for (i = p->individuals_num; i < population_size; i++) + p->individuals[i] = NULL; + + p->individuals_num = population_size; + + pthread_mutex_unlock (&p->lock); + + return (0); +} /* }}} */ + +void *population_get_random (population_t *p) /* {{{ */ +{ + void *ret = NULL; + size_t i; + + pthread_mutex_lock (&p->lock); + + if (p->individuals_num < 1) + { + pthread_mutex_unlock (&p->lock); + return (NULL); + } + + while (ret == NULL) + { + i = (size_t) (((double) p->individuals_num) + * (rand() / (RAND_MAX + 1.0))); + if (p->individuals[i] == NULL) + continue; + + ret = p->copy (p->individuals[i]); + } + + pthread_mutex_unlock (&p->lock); + + return (ret); +} /* }}} void *population_pick_random */ + +void *population_get_fittest (population_t *p) /* {{{ */ +{ + void *ret = NULL; + int best_rating; + size_t i; + + if (p == NULL) + return (NULL); + + pthread_mutex_lock (&p->lock); + + best_rating = INT_MAX; + for (i = 0; i < p->individuals_num; i++) + { + int rating; + + if (p->individuals[i] == NULL) + continue; + + rating = p->rate (p->individuals[i]); + if (rating < best_rating) + { + void *temp; + + temp = p->copy (p->individuals[i]); + if (temp != NULL) + { + if (ret != NULL) + p->free (ret); + ret = temp; + best_rating = rating; + } + } + } + + pthread_mutex_unlock (&p->lock); + + return (ret); +} /* }}} void *population_get_fittest */ + +int population_insert (population_t *p, void *pi_orig) /* {{{ */ +{ + void *pi; + int pi_rating; + int num_tries; + int i; + + if (p == NULL) + return (-1); + + if (pi_orig == NULL) + return (-1); + + pi = p->copy (pi_orig); + if (pi == NULL) + { + fprintf (stderr, "population_insert: p->copy failed.\n"); + return (-1); + } + + pi_rating = p->rate (pi); + + pthread_mutex_lock (&p->lock); + + if (p->individuals_num <= 0) + { + pthread_mutex_unlock (&p->lock); + p->free (pi); + return (-1); + } + + num_tries = (int) ceil (log (p->individuals_num) / log (2.0)); + for (i = 0; i < num_tries; i++) + { + size_t j; + int j_rating; + + j = (size_t) (((double) p->individuals_num) * (rand() / (RAND_MAX + 1.0))); + + if (p->individuals[j] == NULL) + { + p->individuals[j] = pi; + pi = NULL; + break; + } + + j_rating = p->rate (p->individuals[j]); + + if (pi_rating < j_rating) + { + void *temp; + + temp = p->individuals[j]; + p->individuals[j] = pi; + pi = temp; + + pi_rating = j_rating; + } + } + + pthread_mutex_unlock (&p->lock); + + if (pi != NULL) + { + p->free (pi); + pi = NULL; + } + + return (0); +} /* }}} int population_insert */ + +/* vim: set sw=2 sts=2 et fdm=marker : */ + diff --git a/src/population.h b/src/population.h new file mode 100644 index 0000000..d2cf2be --- /dev/null +++ b/src/population.h @@ -0,0 +1,42 @@ +#ifndef POPULATION_H +#define POPULATION_H 1 + +#include +#include + +/* + * Callback function types + * (pi == population individual) + */ +typedef int (*pi_rate_f) (const void *); +typedef void *(*pi_copy_f) (const void *); +typedef void (*pi_free_f) (void *); + +/* + * (Opaque) data types + */ +struct population_s; +typedef struct population_s population_t; + +/* + * Constructor and destructor + */ +population_t *population_create (pi_rate_f rate, pi_copy_f copy, pi_free_f f); +void population_destroy (population_t *p); + +/* + * Object configuration + */ +int population_set_size (population_t *p, size_t population_size); + +/* + * Methods + */ +/* iterations == 0 => infinite */ +void *population_get_random (population_t *p); +void *population_get_fittest (population_t *p); + +int population_insert (population_t *p, void *pi); + +/* vim: set sw=2 sts=2 et : */ +#endif /* POPULATION_H */