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https://github.com/kichikuou/xsystem35-sdl2.git
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113 lines
2.7 KiB
C
113 lines
2.7 KiB
C
/*
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* ald_manager.c dri file manager
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*
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* Copyright (C) 1997-1998 Masaki Chikama (Wren) <chikama@kasumi.ipl.mech.nagoya-u.ac.jp>
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* 1998- <masaki-c@is.aist-nara.ac.jp>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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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. See the
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* GNU General Public License for more details.
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*
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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 the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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/* $Id: ald_manager.c,v 1.3 2001/05/08 05:36:07 chikama Exp $ */
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#include <stdlib.h>
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#include "portab.h"
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#include "dri.h"
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#include "cache.h"
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#include "ald_manager.h"
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#ifdef __EMSCRIPTEN__
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#include <emscripten.h>
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#endif
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/* drifiles object */
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static drifiles *dri[DRIFILETYPEMAX];
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/* cache handler for dri file */
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static cacher *cacheid;
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/*
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* free dridata
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* dfile: dridata to be free
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*/
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static void ald_free(dridata *dfile) {
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free(dfile->data_raw);
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free(dfile);
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}
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/*
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* load dri data
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* type: data type
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* no : file no ( >= 0 )
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* return: loaded dridata object
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*/
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EMSCRIPTEN_KEEPALIVE
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dridata *ald_getdata(DRIFILETYPE type, int no) {
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dridata *ddata;
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/* check wrong request number */
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if (no < 0) return NULL;
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/* check wrong type */
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if (type >= DRIFILETYPEMAX) return NULL;
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/* check uninitilized data */
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if (dri[type] == NULL) return NULL;
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/* if mmapped */
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if (dri[type]->mmapped) return dri_getdata(dri[type], no);
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/* not mmapped */
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if (NULL == (ddata = (dridata *)cache_foreach(cacheid, (type << 16) + no))) {
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ddata = dri_getdata(dri[type], no);
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if (ddata != NULL) {
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ddata->refcnt = 0;
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cache_insert(cacheid, (type << 16) + no, (void *)ddata, ddata->size, &(ddata->refcnt));
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}
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}
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if (ddata != NULL)
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ddata->refcnt++;
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return ddata;
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}
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/*
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* free dri object
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* data: object to be free
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*/
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EMSCRIPTEN_KEEPALIVE
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void ald_freedata(dridata *data) {
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if (data == NULL) return;
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if (data->a->mmapped) {
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free(data);
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} else {
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data->refcnt--;
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}
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}
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void ald_init(int type, const char **file, int cnt, boolean use_mmap) {
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if (type >= DRIFILETYPEMAX || cnt <= 0)
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return;
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dri[type] = dri_init(file, cnt, use_mmap);
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if (!dri[type]->mmapped) {
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cacheid = cache_new(ald_free);
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}
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}
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int ald_get_maxno(DRIFILETYPE type) {
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if (type >= DRIFILETYPEMAX || !dri[type])
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return 0;
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return dri[type]->maxno;
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}
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