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https://git.code.sf.net/p/quake/quakeforge
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973ae0ad54
This is meant for a "permanent" tear-down before freeing the memory holding the VM state or at program shutdown. As a consequence, builtin sub-systems registering resources are now required to pass a "destroy" function pointer that will be called just before the memory holding those resources is freed by the VM resource manager (ie, the manager owns the resource memory block, but each subsystem is responsible for cleaning up any resources held within that block). This even enhances thread-safety in rua_obj (there are some problems with cmd, cvar, and gib).
175 lines
4 KiB
C
175 lines
4 KiB
C
/*
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bi_mersenne.c
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Ruamoko Mersenne Twister api
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Copyright (C) 2021 Bill Currie
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Author: Bill Currie <bill@taniwha.org>
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Date: 2021/12/21
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif
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#include <stdlib.h>
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#include "QF/mersenne.h"
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#include "QF/progs.h"
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#include "rua_internal.h"
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typedef struct {
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//FIXME each mtstate_t is 2500 bytes and the map has 1024 elements
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//per row, so having only one mtstate_t has an overhead of about 2.5MB
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PR_RESMAP (mtstate_t) state_map;
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} mtwist_resources_t;
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static mtstate_t *
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state_new (mtwist_resources_t *res)
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{
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return PR_RESNEW (res->state_map);
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}
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static void
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state_free (mtwist_resources_t *res, mtstate_t *state)
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{
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PR_RESFREE (res->state_map, state);
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}
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static void
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state_reset (mtwist_resources_t *res)
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{
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PR_RESRESET (res->state_map);
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}
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static inline mtstate_t *
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state_get (mtwist_resources_t *res, int index)
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{
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return PR_RESGET(res->state_map, index);
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}
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static inline int __attribute__((pure))
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state_index (mtwist_resources_t *res, mtstate_t *state)
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{
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return PR_RESINDEX(res->state_map, state);
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}
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static void
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bi_mtwist_new (progs_t *pr, void *_res)
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{
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mtwist_resources_t *res = (mtwist_resources_t *) _res;
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mtstate_t *mt = state_new (res);
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mtwist_seed (mt, P_INT (pr, 0));
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R_INT (pr) = state_index (res, mt);
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}
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static mtstate_t * __attribute__((pure))
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get_state (progs_t *pr, mtwist_resources_t *res, const char *name, int index)
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{
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mtstate_t *mt = state_get (res, index);
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if (!mt)
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PR_RunError (pr, "invalid Mersenne Twister state index passed to %s",
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name + 3);
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return mt;
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}
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static void
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bi_mtwist_delete (progs_t *pr, void *_res)
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{
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mtwist_resources_t *res = _res;
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mtstate_t *mt = get_state (pr, res, __FUNCTION__, P_INT (pr, 0));
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state_free (res, mt);
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}
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static void
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bi_mtwist_seed (progs_t *pr, void *_res)
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{
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mtwist_resources_t *res = _res;
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mtstate_t *mt = get_state (pr, res, __FUNCTION__, P_INT (pr, 0));
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mtwist_seed (mt, P_INT (pr, 1));
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}
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static void
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bi_mtwist_rand (progs_t *pr, void *_res)
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{
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mtwist_resources_t *res = _res;
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mtstate_t *mt = get_state (pr, res, __FUNCTION__, P_INT (pr, 0));
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R_INT (pr) = mtwist_rand (mt);
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}
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static void
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bi_mtwist_rand_0_1 (progs_t *pr, void *_res)
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{
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mtwist_resources_t *res = _res;
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mtstate_t *mt = get_state (pr, res, __FUNCTION__, P_INT (pr, 0));
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R_FLOAT (pr) = mtwist_rand_0_1 (mt);
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}
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static void
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bi_mtwist_rand_m1_1 (progs_t *pr, void *_res)
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{
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mtwist_resources_t *res = _res;
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mtstate_t *mt = get_state (pr, res, __FUNCTION__, P_INT (pr, 0));
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R_FLOAT (pr) = mtwist_rand_m1_1 (mt);
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}
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static void
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bi_mtwist_clear (progs_t *pr, void *_res)
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{
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mtwist_resources_t *res = (mtwist_resources_t *) _res;
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state_reset (res);
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}
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static void
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bi_mtwist_destroy (progs_t *pr, void *_res)
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{
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}
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#define bi(x,np,params...) {#x, bi_##x, -1, np, {params}}
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#define p(type) PR_PARAM(type)
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static builtin_t builtins[] = {
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bi(mtwist_new, 1, p(int)),
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bi(mtwist_delete, 1, p(ptr)),
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bi(mtwist_seed, 2, p(ptr), p(int)),
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bi(mtwist_rand, 1, p(ptr)),
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bi(mtwist_rand_0_1, 1, p(ptr)),
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bi(mtwist_rand_m1_1, 1, p(ptr)),
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{0}
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};
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void
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RUA_Mersenne_Init (progs_t *pr, int secure)
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{
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mtwist_resources_t *res = calloc (1, sizeof (mtwist_resources_t));
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PR_Resources_Register (pr, "Mersenne Twister", res, bi_mtwist_clear,
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bi_mtwist_destroy);
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PR_RegisterBuiltins (pr, builtins, res);
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}
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