quakeforge/libs/util/plugin.c

175 lines
3.8 KiB
C
Raw Normal View History

/*
plugin.c
QuakeForge plugin API functions
Copyright (C) 2001 Jeff Teunissen <deek@quakeforge.net>
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; either version 2
of the License, or (at your option) any later version.
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:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
$Id$
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_STDIO_H
# include <stdio.h>
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#ifdef HAVE_WINDOWS_H
# include <windows.h>
#endif
#ifdef HAVE_DLFCN_H
# include <dlfcn.h>
#endif
#ifndef RTLD_LAZY
# ifdef DL_LAZY
# define RTLD_LAZY DL_LAZY
# else
# define RTLD_LAZY 0
# endif
#endif
2001-05-31 03:41:35 +00:00
#include "QF/cvar.h"
#include "QF/plugin.h"
#include "QF/console.h"
#include "compat.h"
cvar_t *fs_pluginpath;
void
PI_InitCvars (void)
{
fs_pluginpath = Cvar_Get ("fs_pluginpath", FS_PLUGINPATH, CVAR_ROM, NULL,
"Location of your plugin directory");
}
/*
PI_Init
Eventually this function will likely initialize libltdl. It doesn't, yet,
since we aren't using libltdl yet.
*/
void
PI_Init (void)
{
PI_InitCvars ();
}
void
PI_Shutdown (void)
{
}
plugin_t *
2001-07-15 07:04:17 +00:00
PI_LoadPlugin (const char *type, const char *name)
{
char realname[4096];
char *tmpname;
void *dlhand = NULL;
plugin_t *plugin = NULL;
P_PluginInfo plugin_info = NULL;
if (!name)
return NULL;
tmpname = strrchr (name, '/'); // Get the base name, don't allow paths
// Build the path to the file to load
#if defined(HAVE_DLOPEN)
snprintf (realname, sizeof (realname), "%s/lib%s_%s.so",
fs_pluginpath->string, type, (tmpname ? tmpname + 1 : name));
#elif defined(_WIN32)
snprintf (realname, sizeof (realname), "%s/QF%s_%s.dll",
fs_pluginpath->string, type, (tmpname ? tmpname + 1 : name));
#else
# error "No shared library support. FIXME"
return NULL;
#endif
#if defined(HAVE_DLOPEN)
if (!(dlhand = dlopen (realname, RTLD_LAZY))) { // lib not found
Con_Printf ("Could not load plugin \"%s\": %s\n", realname, dlerror ());
return NULL;
}
#elif defined (_WIN32)
if (!(dlhand = LoadLibrary (realname))) { // lib not found
Con_Printf ("Could not load plugin \"%s\".\n", realname);
return NULL;
}
#endif
#if defined(HAVE_DLOPEN)
if (!(plugin_info = dlsym (dlhand, "PluginInfo"))) { // info function not found
dlclose (dlhand);
Con_Printf ("Plugin info function not found\n");
return NULL;
}
#elif defined (_WIN32)
if (!(plugin_info = (P_PluginInfo) GetProcAddress (dlhand, "PluginInfo"))) { // info function not found
FreeLibrary (dlhand);
Con_Printf ("Plugin info function not found\n");
return NULL;
}
#endif
if (!(plugin = plugin_info ())) { // Something went badly wrong
#if defined(HAVE_DLOPEN)
dlclose (dlhand);
#elif defined (_WIN32)
FreeLibrary (dlhand);
#endif
Con_Printf ("Something went badly wrong.\n");
return NULL;
}
plugin->handle = dlhand;
return plugin;
}
qboolean
PI_UnloadPlugin (plugin_t *plugin)
{
if (plugin
&& plugin->functions
&& plugin->functions->general
&& plugin->functions->general->p_Shutdown) {
plugin->functions->general->p_Shutdown ();
} else {
Con_Printf ("Warning: No shutdown function for plugin!");
}
#if defined(HAVE_DLOPEN)
return (dlclose (plugin->handle) == 0);
#elif defined (_WIN32)
return (FreeLibrary (plugin->handle) == 0);
#endif
}