1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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 the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#ifndef BACKENDS_PLUGINS_DYNAMICPLUGIN_H
#define BACKENDS_PLUGINS_DYNAMICPLUGIN_H
#include "base/plugins.h"
#include "engines/metaengine.h"
class DynamicPlugin : public Plugin {
protected:
typedef void (*VoidFunc)();
typedef MetaEngine *(*MetaAllocFunc)();
MetaEngine *_metaengine;
virtual VoidFunc findSymbol(const char *symbol) = 0;
public:
DynamicPlugin() : _metaengine(0) {}
~DynamicPlugin() {
// FIXME: The plugin has already been unloaded, so _metaengine isn't
// a valid pointer anymore, and you can't call unloadPlugin from here.
//delete _metaengine;
}
const char *getName() const {
return _metaengine->getName();
}
const char *getCopyright() const {
return _metaengine->getCopyright();
}
PluginError createInstance(OSystem *syst, Engine **engine) const {
return _metaengine->createInstance(syst, engine);
}
GameList getSupportedGames() const {
return _metaengine->getSupportedGames();
}
GameDescriptor findGame(const char *gameid) const {
return _metaengine->findGame(gameid);
}
GameList detectGames(const FSList &fslist) const {
return _metaengine->detectGames(fslist);
}
virtual bool loadPlugin() {
// Query the plugin's name
MetaAllocFunc metaAlloc = (MetaAllocFunc)findSymbol("PLUGIN_MetaEngine_alloc");
if (!metaAlloc) {
unloadPlugin();
return false;
}
_metaengine = metaAlloc();
if (!_metaengine) {
unloadPlugin();
return false;
}
return true;
}
};
#endif
|
