X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=include%2Fdynamic.h;h=db46291c4b888f34acec0d1101ec725431c5383f;hb=603acdf77e561f527b27a4da5a4c74dc9d699b89;hp=ee43d1712cd99b52cec8258a6296dae484be1928;hpb=6fa35bdb1814ef4eab42d050e283d05910dbf3d2;p=user%2Fhenk%2Fcode%2Finspircd.git

diff --git a/include/dynamic.h b/include/dynamic.h
index ee43d1712..db46291c4 100644
--- a/include/dynamic.h
+++ b/include/dynamic.h
@@ -2,88 +2,126 @@
  *       | Inspire Internet Relay Chat Daemon |
  *       +------------------------------------+
  *
- *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
- *                       E-mail:
- *                <brain@chatspike.net>
- *           	  <Craig@chatspike.net>
- *     
- * Written by Craig Edwards, Craig McLure, and others.
+ *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
+ * See: http://www.inspircd.org/wiki/index.php/Credits
+ *
  * This program is free but copyrighted software; see
  *            the file COPYING for details.
  *
  * ---------------------------------------------------
  */
 
-
 #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 DLLManager
+class InspIRCd;
+
+/** The DLLManager class is able to load a module file by filename,
+ * and locate its init_module symbol.
+ */
+class CoreExport DLLManager
 {
  public:
-	DLLManager(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();
 
+	/** 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);
 
-#ifdef STATIC_LINK
-	bool GetSymbol( initfunc* &v, char *sym_name );
-#else
-	bool GetSymbol( void **, char *sym_name );
-#endif
-
+	/** 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.
+	 * This is OS dependent, on POSIX platforms it is a pointer to a function
+	 * pointer (yes, really!) and on windows it is a library handle.
+	 */
 	void *h;
+
+ protected:
+
+	/** The last error string, or NULL
+	 */
 	char *err;
-#ifdef STATIC_LINK
-	char staticname[1024];
-#endif
 };
 
-
-class DLLFactoryBase : public DLLManager
+/** 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 CoreExport DLLFactoryBase : public DLLManager
 {
  public:
-	DLLFactoryBase(char *fname, 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
-	initfunc *factory_func;
-#else
+
+	/** A function pointer to the factory function.
+	 */
 	void * (*factory_func)(void);	
-#endif
 };
 
-
-template <class T> class DLLFactory : public DLLFactoryBase
+/** 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 CoreExport DLLFactory : public DLLFactoryBase
 {
  public:
-	DLLFactory(char *fname, 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
+