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#ifndef PLUGGER_H
#define PLUGGER_H
#include "hashtable.h"
#include "list"
#include "hashfunctionstring.h"
#include "hashfunctionint.h"
#include "dlfcn.h"
#include "exceptions.h"
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; \
} \
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; \
} \
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; \
} \
PluginInfo structname = { \
#pluginname, name, ver, rev, \
(void *(*)())(create ##classname), \
(void (*)( void * ))(destroy ##classname) }; \
}
template<class T>
class Plugger
{
public:
public:
Plugger() :
hPlugin( new HashFunctionString(), 11 ),
hObj( new HashFunctionInt(), 11 )
{
}
virtual ~Plugger()
{
void *pos = hObj.getFirstItemPos();
while( (pos = hObj.getNextItemPos( pos )) )
{
T *pPlug = (T *)hObj.getItemID( pos );
PluginReg *pReg = (PluginReg *)hObj.getItemData( pos );
pReg->pInfo->destroyPlugin( pPlug );
}
std::list<PluginReg *>::iterator i;
for( i = lPlugin.begin(); i != lPlugin.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;
lPlugin.insert( lPlugin.end(), pReg );
hPlugin.insert( pInfo->sID, pReg );
}
void registerExternalPlugin( const char *sFName, const char *sPluginName )
{
PluginReg *pReg = (PluginReg *)hPlugin[sPluginName];
if( pReg != NULL )
{
hPlugin.del( sPluginName );
dlclose( pReg->dlHandle );
delete pReg;
pReg = NULL;
}
pReg = new PluginReg;
pReg->bBuiltin = false;
pReg->dlHandle = dlopen( sFName, RTLD_NOW );
if( pReg->dlHandle == NULL )
{
throw PluginException( 1, "Error on %s: %s", sFName, dlerror() );
}
pReg->pInfo = (PluginInfo *)dlsym( pReg->dlHandle, sPluginName );
if( pReg->pInfo == NULL )
{
throw PluginException( 2, "Error on %s: %s", sFName, dlerror() );
}
hPlugin.insert( pReg->pInfo->sID, pReg );
lPlugin.insert( lPlugin.end(), pReg );
}
T *instantiate( const char *lpName )
{
PluginReg *pReg = (PluginReg *)hPlugin[lpName];
if( pReg == NULL )
return NULL;
T *p = (T *)pReg->pInfo->createPlugin();
hObj.insert( p, pReg );
//printf("pReg: %08X, pPlug: %08X\n", pReg, p );
return p;
}
bool hasPlugin( const char *lpName )
{
if( hPlugin[lpName] == NULL )
return false;
return true;
}
void destroy( T *pPlug )
{
PluginReg *pReg = (PluginReg *)hObj[pPlug];
//printf("pReg: %08X, pPlug: %08X\n", pReg, pPlug );
if( pReg == NULL )
return;
pReg->pInfo->destroyPlugin( pPlug );
hObj.del( pPlug );
}
void unloadAll()
{
std::list<PluginReg *>::iterator i;
for( i = lPlugin.begin(); i != lPlugin.end(); i++ )
{
if( (*i)->bBuiltin == false )
{
dlclose( (*i)->dlHandle );
}
delete (*i);
}
hPlugin.clear();
}
private:
std::list<PluginReg *> lPlugin;
HashTable hPlugin;
HashTable hObj;
};
#endif
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