-/* +------------------------------------+
- * | Inspire Internet Relay Chat Daemon |
- * +------------------------------------+
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
*
- * InspIRCd: (C) 2002-2009 InspIRCd Development Team
- * See: http://wiki.inspircd.org/Credits
+ * Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
+ * Copyright (C) 2006-2007 Oliver Lupton <oliverlupton@gmail.com>
+ * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
+ * Copyright (C) 2003-2005, 2007 Craig Edwards <craigedwards@brainbox.cc>
*
- * This program is free but copyrighted software; see
- * the file COPYING for details.
+ * This file is part of InspIRCd. InspIRCd 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, version 2.
*
- * ---------------------------------------------------
+ * 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, see <http://www.gnu.org/licenses/>.
*/
-#ifndef __BASE_H__
-#define __BASE_H__
+
+#ifndef BASE_H
+#define BASE_H
#include <map>
#include <deque>
#include <string>
+#include <list>
+
+/** Dummy class to help enforce culls being parent-called up to classbase */
+class CullResult
+{
+ CullResult();
+ friend class classbase;
+};
-/** The base class for all inspircd classes.
- * Wherever possible, all classes you create should inherit from this,
- * giving them the ability to be passed to various core functions
- * as 'anonymous' classes.
-*/
+/** The base class for all inspircd classes with a well-defined lifetime.
+ * Classes that inherit from this may be destroyed through GlobalCulls,
+ * and may rely on cull() being called prior to their deletion.
+ */
class CoreExport classbase
{
public:
/**
* Called just prior to destruction via cull list.
- *
- * @return true to allow the delete, or false to halt the delete
*/
- virtual bool cull();
+ virtual CullResult cull();
virtual ~classbase();
+ private:
+ // uncopyable
+ classbase(const classbase&);
+ void operator=(const classbase&);
+};
+
+/** The base class for inspircd classes that provide a wrapping interface, and
+ * should only exist while being used. Prevents heap allocation.
+ */
+class CoreExport interfacebase
+{
+ public:
+ interfacebase() {}
+ static inline void* operator new(size_t, void* m) { return m; }
+ private:
+ interfacebase(const interfacebase&);
+ void operator=(const interfacebase&);
+ static void* operator new(size_t);
+ static void operator delete(void*);
};
/** The base class for inspircd classes that support reference counting.
* Any objects that do not have a well-defined lifetime should inherit from
- * this
+ * this, and should be assigned to a reference<type> object to establish their
+ * lifetime.
+ *
+ * Reference objects should not hold circular references back to themselves,
+ * even indirectly; this will cause a memory leak because the count will never
+ * drop to zero.
+ *
+ * Using a normal pointer for the object is recommended if you can assure that
+ * at least one reference<> will remain as long as that pointer is used; this
+ * will avoid the slight overhead of changing the reference count.
*/
-class CoreExport refcountbase : public classbase
+class CoreExport refcountbase
{
- unsigned int refcount;
+ mutable unsigned int refcount;
public:
refcountbase();
- virtual bool cull();
virtual ~refcountbase();
inline unsigned int GetReferenceCount() const { return refcount; }
- friend class reference_base;
+ static inline void* operator new(size_t, void* m) { return m; }
+ static void* operator new(size_t);
+ static void operator delete(void*);
+ inline void refcount_inc() const { refcount++; }
+ inline bool refcount_dec() const { refcount--; return !refcount; }
+ private:
+ // uncopyable
+ refcountbase(const refcountbase&);
+ void operator=(const refcountbase&);
};
-class CoreExport reference_base
+/** Base class for use count tracking. Uses reference<>, but does not
+ * cause object deletion when the last user is removed.
+ *
+ * Safe for use as a second parent class; will not add a second vtable.
+ */
+class CoreExport usecountbase
{
- protected:
- static inline unsigned int inc(refcountbase* v) { return ++(v->refcount); }
- static inline unsigned int dec(refcountbase* v) { return --(v->refcount); }
+ mutable unsigned int usecount;
+ public:
+ usecountbase() : usecount(0) { }
+ ~usecountbase();
+ inline unsigned int GetUseCount() const { return usecount; }
+ inline void refcount_inc() const { usecount++; }
+ inline bool refcount_dec() const { usecount--; return false; }
+ private:
+ // uncopyable
+ usecountbase(const usecountbase&);
+ void operator=(const usecountbase&);
};
template <typename T>
-class CoreExport reference : public reference_base
+class reference
{
T* value;
public:
reference() : value(0) { }
- reference(T* v) : value(v) { if (value) inc(value); }
- reference(const reference& v) : value(v.value) { if (value) inc(value); }
+ reference(T* v) : value(v) { if (value) value->refcount_inc(); }
+ reference(const reference<T>& v) : value(v.value) { if (value) value->refcount_inc(); }
reference<T>& operator=(const reference<T>& other)
{
if (other.value)
- inc(other.value);
+ other.value->refcount_inc();
this->reference::~reference();
value = other.value;
return *this;
~reference()
{
- if (value)
+ if (value && value->refcount_dec())
+ delete value;
+ }
+
+ inline reference<T>& operator=(T* other)
+ {
+ if (value != other)
{
- int rc = dec(value);
- if (rc == 0 && value->cull())
+ if (value && value->refcount_dec())
delete value;
+ value = other;
+ if (value)
+ value->refcount_inc();
}
+
+ return *this;
}
- inline const T* operator->() const { return value; }
- inline const T& operator*() const { return *value; }
- inline T* operator->() { return value; }
- inline T& operator*() { return *value; }
- inline operator bool() const { return value; }
+
+ inline operator bool() const { return (value != NULL); }
inline operator T*() const { return value; }
+ inline T* operator->() const { return value; }
+ inline T& operator*() const { return *value; }
+ inline bool operator<(const reference<T>& other) const { return value < other.value; }
+ inline bool operator>(const reference<T>& other) const { return value > other.value; }
+ static inline void* operator new(size_t, void* m) { return m; }
+ private:
+#ifndef _WIN32
+ static void* operator new(size_t);
+ static void operator delete(void*);
+#endif
};
/** This class can be used on its own to represent an exception, or derived to represent a module-specific exception.
*/
class CoreExport CoreException : public std::exception
{
- protected:
+ public:
/** Holds the error message to be displayed
*/
const std::string err;
/** Source of the exception
*/
const std::string source;
- public:
/** Default constructor, just uses the error mesage 'Core threw an exception'.
*/
CoreException() : err("Core threw an exception"), source("The core") {}
* Actually no, it does nothing. Never mind.
* @throws Nothing!
*/
- virtual ~CoreException() throw() {};
+ virtual ~CoreException() throw() {}
/** Returns the reason for the exception.
* The module should probably put something informative here as the user will see this upon failure.
*/
}
};
+class Module;
class CoreExport ModuleException : public CoreException
{
public:
- /** Default constructor, just uses the error mesage 'Module threw an exception'.
- */
- ModuleException() : CoreException("Module threw an exception", "A Module") {}
-
/** This constructor can be used to specify an error message before throwing.
*/
- ModuleException(const std::string &message) : CoreException(message, "A Module") {}
- /** This destructor solves world hunger, cancels the world debt, and causes the world to end.
- * Actually no, it does nothing. Never mind.
- * @throws Nothing!
- */
- virtual ~ModuleException() throw() {};
+ ModuleException(const std::string &message, Module* me = NULL);
};
+typedef const reference<Module> ModuleRef;
+
+enum ServiceType {
+ /** is a Command */
+ SERVICE_COMMAND,
+ /** is a ModeHandler */
+ SERVICE_MODE,
+ /** is a metadata descriptor */
+ SERVICE_METADATA,
+ /** is a data processing provider (MD5, SQL) */
+ SERVICE_DATA,
+ /** is an I/O hook provider (SSL) */
+ SERVICE_IOHOOK
+};
+
+/** A structure defining something that a module can provide */
+class CoreExport ServiceProvider : public classbase
+{
+ public:
+ /** Module that is providing this service */
+ ModuleRef creator;
+ /** Name of the service being provided */
+ const std::string name;
+ /** Type of service (must match object type) */
+ const ServiceType service;
+ ServiceProvider(Module* Creator, const std::string& Name, ServiceType Type)
+ : creator(Creator), name(Name), service(Type) {}
+ virtual ~ServiceProvider();
+};
+
+
#endif
projects / user / henk / code / inspircd.git / blobdiff