* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
- * Inspire is copyright (C) 2002-2004 ChatSpike-Dev.
+ * InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
* E-mail:
* <brain@chatspike.net>
* <Craig@chatspike.net>
#ifndef __DLL_H
#define __DLL_H
+/** This typedef represents the init_module function within each module.
+ * The init_module function is the only exported extern "C" declaration
+ * in any module file.
+ */
typedef void * (initfunc) (void);
#include "inspircd_config.h"
+class InspIRCd;
+
+/** The DLLManager class is able to load a module file by filename,
+ * and locate its init_module symbol.
+ */
class DLLManager
{
public:
- DLLManager( const char *fname );
+ /** This constructor loads the module using dlopen()
+ * @param ServerInstance The creator class of this object
+ * @param fname The filename to load. This should be within
+ * the modules dir.
+ */
+ DLLManager(InspIRCd* ServerInstance, const char *fname);
virtual ~DLLManager();
#ifdef STATIC_LINK
- bool GetSymbol( initfunc* &v, const char *sym_name );
+ /** Get a symbol using static linking.
+ * @param v A static function pointer, pointing at an init_module function
+ * @param sym_name The symbol name to find, usually "init_module"
+ * @return True if the symbol can be found
+ */
+ bool GetSymbol(initfunc* &v, const char *sym_name);
#else
- bool GetSymbol( void **, const char *sym_name );
+ /** Get a symbol using dynamic linking.
+ * @param v A function pointer, pointing at an init_module function
+ * @param sym_name The symbol name to find, usually "init_module"
+ * @return true if the symbol can be found, also the symbol will be put into v.
+ */
+ bool GetSymbol(void **v, const char *sym_name);
#endif
-
- const char *LastError()
+ /** Get the last error from dlopen() or dlsym().
+ * @return The last error string, or NULL if no error has occured
+ */
+ char* LastError()
{
return err;
}
-
- protected:
+
+ /** The module handle
+ */
void *h;
+
+ protected:
+
+ /** The last error string, or NULL
+ */
char *err;
#ifdef STATIC_LINK
+
+ /** The module name
+ */
char staticname[1024];
#endif
};
-
+/** This class is a specialized form of DLLManager designed to load InspIRCd modules.
+ * It's job is to call the init_module function and receive a factory pointer.
+ */
class DLLFactoryBase : public DLLManager
{
public:
- DLLFactoryBase(const char *fname, const char *func_name = 0);
+ /** Default constructor.
+ * This constructor loads a module file by calling its DLLManager subclass constructor,
+ * then finds the symbol using DLLManager::GetSymbol(), and calls the symbol,
+ * obtaining a valid pointer to the init_module function
+ */
+ DLLFactoryBase(InspIRCd* Instance, const char *fname, const char *func_name = 0);
+
+ /** Default destructor
+ */
virtual ~DLLFactoryBase();
#ifdef STATIC_LINK
+ /** A function pointer to the factory function
+ */
initfunc *factory_func;
#else
+ /** A function pointer to the factory function
+ */
void * (*factory_func)(void);
#endif
};
-
+/** This is the highest-level class of the DLLFactory system used to load InspIRCd modules.
+ * Its job is to finally call the init_module function and obtain a pointer to a ModuleFactory.
+ * This template is a container for ModuleFactory itself, so that it may 'plug' into ModuleFactory
+ * and provide module loading capabilities transparently.
+ */
template <class T> class DLLFactory : public DLLFactoryBase
{
public:
- DLLFactory(const char *fname, const char *func_name=0) : DLLFactoryBase(fname,func_name)
+ /** Default constructor.
+ * This constructor passes its paramerers down through DLLFactoryBase and then DLLManager
+ * to load the module, then calls the factory function to retrieve a pointer to a ModuleFactory
+ * class. It is then down to the core to call the ModuleFactory::CreateModule() method and
+ * receive a Module* which it can insert into its module lists.
+ */
+ DLLFactory(InspIRCd* Instance, const char *fname, const char *func_name=0) : DLLFactoryBase(Instance, fname, func_name)
{
if (factory_func)
- factory = (T*)factory_func();
+ factory = reinterpret_cast<T*>(factory_func());
else
- factory = 0;
+ factory = reinterpret_cast<T*>(-1);
}
+ /** The destructor deletes the ModuleFactory pointer.
+ */
~DLLFactory()
{
- delete factory;
+ if (factory)
+ delete factory;
}
+ /** The ModuleFactory pointer.
+ */
T *factory;
};
-
-
-
-
-
#endif