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
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
/*
* Copyright (C) 2007-2010 Xagasoft, All rights reserved.
*
* This file is part of the libbu++ library and is released under the
* terms of the license contained in the file LICENSE.
*/
#ifndef BU_PLUGGER_H
#define BU_PLUGGER_H
#ifndef WIN32 //yeah, this one is going to take some work...
#include "bu/hash.h"
#include "bu/list.h"
#include <dlfcn.h>
#include "bu/exceptionbase.h"
#include "bu/fstring.h"
#include <stddef.h>
namespace Bu
{
subExceptionDecl( PluginException );
typedef struct PluginInfo
{
const char *sID;
const char *sAuthor;
unsigned short nVersion;
unsigned short nRevision;
void *(*createPlugin)();
void (*destroyPlugin)( void * );
} PluginInfo;
typedef struct PluginReg
{
bool bBuiltin;
void *dlHandle;
PluginInfo *pInfo;
} PluginReg;
#define PluginInterface( classname, baseclass, name, ver, rev ) \
extern "C" { \
baseclass *create ##classname() \
{ \
return new classname(); \
} \
void destroy ##classname( baseclass *pCls ) \
{ \
delete pCls; \
} \
Bu::PluginInfo classname = { \
#classname, name, ver, rev, \
create ##classname, destroy ##classname }; \
}
#define PluginInterface2( pluginname, classname, baseclass, name, ver, rev ) \
extern "C" { \
baseclass *create ##classname() \
{ \
return new classname(); \
} \
void destroy ##classname( baseclass *pCls ) \
{ \
delete pCls; \
} \
Bu::PluginInfo pluginname = { \
#pluginname, name, ver, rev, \
(void *(*)())(create ##classname), \
(void (*)( void * ))(destroy ##classname) }; \
}
#define PluginInterface3( structname, pluginname, classname, baseclass, name, ver, rev ) \
extern "C" { \
baseclass *create ##classname() \
{ \
return new classname(); \
} \
void destroy ##classname( baseclass *pCls ) \
{ \
delete pCls; \
} \
Bu::PluginInfo structname = { \
#pluginname, name, ver, rev, \
(void *(*)())(create ##classname), \
(void (*)( void * ))(destroy ##classname) }; \
}
template<class T>
class Plugger
{
public:
typedef Bu::Hash<Bu::FString, PluginReg *> PluginHash;
typedef Bu::Hash<ptrdiff_t, void *> InstHash;
public:
Plugger()
{
}
virtual ~Plugger()
{
for( InstHash::iterator i = hObj.begin(); i != hObj.end(); i++ )
{
T *pPlug = (T *)i.getKey();
PluginReg *pReg = (PluginReg *)*i;
pReg->pInfo->destroyPlugin( pPlug );
}
for( PluginHash::iterator i = hPlugin.begin();
i != hPlugin.end(); i++ )
{
if( (*i)->bBuiltin == false )
{
dlclose( (*i)->dlHandle );
}
delete (*i);
}
}
void registerBuiltinPlugin( PluginInfo *pInfo )
{
PluginReg *pReg = new PluginReg;
pReg->bBuiltin = true;
pReg->pInfo = pInfo;
hPlugin.insert( pInfo->sID, pReg );
}
void registerExternalPlugin( const Bu::FString &sFName,
const Bu::FString &sPluginName )
{
PluginReg *pReg;
try {
pReg = (PluginReg *)hPlugin[sPluginName];
hPlugin.erase( sPluginName );
dlclose( pReg->dlHandle );
delete pReg;
pReg = NULL;
} catch( Bu::HashException &e )
{
}
pReg = new PluginReg;
pReg->bBuiltin = false;
pReg->dlHandle = dlopen( sFName.getStr(), RTLD_NOW );
if( pReg->dlHandle == NULL )
{
throw PluginException( 1, "Error on %s: %s", sFName.getStr(),
dlerror() );
}
pReg->pInfo = (PluginInfo *)dlsym( pReg->dlHandle,
sPluginName.getStr() );
if( pReg->pInfo == NULL )
{
throw PluginException( 2, "Error on %s: %s", sFName.getStr(),
dlerror() );
}
hPlugin.insert( pReg->pInfo->sID, pReg );
}
T *instantiate( const Bu::FString &lpName )
{
PluginReg *pReg = (PluginReg *)hPlugin[lpName];
if( pReg == NULL )
return NULL;
T *p = (T *)pReg->pInfo->createPlugin();
hObj.insert( (ptrdiff_t)p, pReg );
//printf("pReg: %08X, pPlug: %08X\n", pReg, p );
return p;
}
bool hasPlugin( const Bu::FString &lpName )
{
return hPlugin.has( lpName );
}
void destroy( T *pPlug )
{
PluginReg *pReg = (PluginReg *)hObj.get((int)pPlug);
//printf("pReg: %08X, pPlug: %08X\n", pReg, pPlug );
if( pReg == NULL )
return;
pReg->pInfo->destroyPlugin( pPlug );
hObj.erase( (ptrdiff_t)pPlug );
}
void unloadAll()
{
for( PluginHash::iterator i = hPlugin.begin();
i != hPlugin.end(); i++ )
{
if( (*i)->bBuiltin == false )
{
dlclose( (*i)->dlHandle );
}
delete (*i);
}
hPlugin.clear();
}
Bu::List<Bu::FString> getPluginList()
{
return hPlugin.getKeys();
}
private:
PluginHash hPlugin;
InstHash hObj;
};
}
#endif //#ifndef WIN32 //yeah, this one is going to take some work...
#endif
|
