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
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
/* ScummVM - Scumm Interpreter
* Copyright (C) 2001 Ludvig Strigeus
* Copyright (C) 2001-2005 The ScummVM project
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#ifndef COMMON_PLUGINS_H
#define COMMON_PLUGINS_H
#include "common/array.h"
#include "common/singleton.h"
#include "common/util.h"
class Engine;
class FSList;
class GameDetector;
class OSystem;
struct GameSettings;
/** List of games. */
typedef Common::Array<GameSettings> GameList;
/**
* A detected game. Carries the GameSettings, but also (optionally)
* information about the language and platform of the detected game.
*/
struct DetectedGame : GameSettings {
Common::Language language;
Common::Platform platform;
DetectedGame() : language(Common::UNK_LANG), platform(Common::kPlatformUnknown) {}
DetectedGame(const GameSettings &game,
Common::Language l = Common::UNK_LANG,
Common::Platform p = Common::kPlatformUnknown)
: GameSettings(game), language(l), platform(p) {}
};
/** List of detected games. */
typedef Common::Array<DetectedGame> DetectedGameList;
/**
* Abstract base class for the plugin system.
* Subclasses for this can be used to wrap both static and dynamic
* plugins.
*/
class Plugin {
public:
virtual ~Plugin() {}
virtual bool loadPlugin() { return true; }
virtual void unloadPlugin() {}
virtual const char *getName() const = 0;
virtual int getVersion() const { return 0; } // TODO!
virtual GameList getSupportedGames() const = 0;
virtual GameSettings findGame(const char *gameName) const;
virtual DetectedGameList detectGames(const FSList &fslist) const = 0;
virtual Engine *createInstance(GameDetector *detector, OSystem *syst) const = 0;
};
/**
* REGISTER_PLUGIN is a convenience macro meant to ease writing
* the plugin interface for our modules. In particular, using it
* makes it possible to compile the very same code in a module
* both as a static and a dynamic plugin.
*
* @todo add some means to query the plugin API version etc.
* @todo on Windows, we might need __declspec(dllexport) ?
*/
#if defined(PALMOS_ARM) || defined(PALMOS_DEBUG)
#define REGISTER_PLUGIN(ID,name) \
PluginRegistrator *g_##ID##_PluginReg; \
void g_##ID##_PluginReg_alloc() { \
g_##ID##_PluginReg = new PluginRegistrator(name, Engine_##ID##_gameList(), Engine_##ID##_create, Engine_##ID##_detectGames);\
}
#else
#ifndef DYNAMIC_MODULES
#define REGISTER_PLUGIN(ID,name) \
PluginRegistrator g_##ID##_PluginReg(name, Engine_##ID##_gameList(), Engine_##ID##_create, Engine_##ID##_detectGames);
#else
#define REGISTER_PLUGIN(ID,name) \
extern "C" { \
PLUGIN_EXPORT const char *PLUGIN_name() { return name; } \
PLUGIN_EXPORT GameList PLUGIN_getSupportedGames() { return Engine_##ID##_gameList(); } \
PLUGIN_EXPORT Engine *PLUGIN_createEngine(GameDetector *detector, OSystem *syst) { return Engine_##ID##_create(detector, syst); } \
PLUGIN_EXPORT DetectedGameList PLUGIN_detectGames(const FSList &fslist) { return Engine_##ID##_detectGames(fslist); } \
}
#endif
#endif
#ifndef DYNAMIC_MODULES
/**
* The PluginRegistrator class is used by the static version of REGISTER_PLUGIN
* to allow static 'plugins' to register with the PluginManager.
*/
class PluginRegistrator {
friend class PluginManager;
public:
typedef Engine *(*EngineFactory)(GameDetector *detector, OSystem *syst);
typedef DetectedGameList (*DetectFunc)(const FSList &fslist);
protected:
const char *_name;
EngineFactory _ef;
DetectFunc _df;
GameList _games;
public:
PluginRegistrator(const char *name, GameList games, EngineFactory ef, DetectFunc df);
};
#endif
/** List of plugins. */
typedef Common::Array<Plugin *> PluginList;
class PluginManager;
/**
* Instances of this class manage all plugins, including loading them,
* making wrapper objects of class Plugin available, and unloading them.
*
* @todo Add support for dynamic plugins (this may need additional API, e.g. for a plugin path)
*/
class PluginManager : public Common::Singleton<PluginManager> {
private:
PluginList _plugins;
bool tryLoadPlugin(Plugin *plugin);
friend class Common::Singleton<SingletonBaseType>;
PluginManager();
public:
~PluginManager();
void loadPlugins();
void unloadPlugins();
void unloadPluginsExcept(const Plugin *plugin);
const PluginList &getPlugins() { return _plugins; }
DetectedGameList detectGames(const FSList &fslist) const;
};
#endif
|
