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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).
116 lines
2.5 KiB
C
116 lines
2.5 KiB
C
/*
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pr_resource.c
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progs resource management
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Copyright (C) 2001 Bill Currie <bill@taniwha.org>
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Author: Bill Currie <bill@taniwha.org>
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Date: 2002/1/29
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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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#include <stdlib.h>
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#include "QF/hash.h"
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#include "QF/progs.h"
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#include "QF/sys.h"
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struct pr_resource_s {
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const char *name;
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pr_resource_t *next;
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void *data;
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void (*clear)(progs_t *pr, void *data);
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void (*destroy)(progs_t *pr, void *data);
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};
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static const char *
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resource_get_key (const void *r, void *unused)
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{
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return ((pr_resource_t *)r)->name;
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}
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VISIBLE void
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PR_Resources_Init (progs_t *pr)
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{
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pr->resource_hash = Hash_NewTable (1021, resource_get_key, 0, 0,
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pr->hashctx);
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pr->resources = 0;
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}
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void
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PR_Resources_Clear (progs_t *pr)
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{
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pr_resource_t *res = pr->resources;
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while (res) {
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res->clear (pr, res->data);
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res = res->next;
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}
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}
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VISIBLE void
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PR_Resources_Shutdown (progs_t *pr)
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{
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// Clear resources first in case there are any cross-dependencies
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PR_Resources_Clear (pr);
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pr_resource_t *res = pr->resources;
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while (res) {
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pr_resource_t *t = res->next;
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res->destroy (pr, res->data);
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free (res->data);
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free (res);
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res = t;
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}
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pr->resources = 0;
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Hash_DelTable (pr->resource_hash);
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pr->resource_hash = 0;
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}
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VISIBLE void
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PR_Resources_Register (progs_t *pr, const char *name, void *data,
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void (*clear)(progs_t *, void *),
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void (*destroy)(progs_t *, void *))
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{
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pr_resource_t *res = malloc (sizeof (pr_resource_t));
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if (!res)
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Sys_Error ("PR_Resources_Register: out of memory");
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res->name = name;
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res->data = data;
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res->clear = clear;
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res->destroy = destroy;
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res->next = pr->resources;
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pr->resources = res;
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Hash_Add (pr->resource_hash, res);
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}
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VISIBLE void *
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PR_Resources_Find (progs_t *pr, const char *name)
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{
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pr_resource_t *res = Hash_Find (pr->resource_hash, name);
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if (!res)
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return 0;
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return res->data;
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}
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