* | 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) 2002-2010 InspIRCd Development Team
+ * See: http://wiki.inspircd.org/Credits
+ *
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
-#ifndef __BASE_H__
-#define __BASE_H__
+#ifndef __BASE_H__
+#define __BASE_H__
-#include "inspircd_config.h"
-#include <time.h>
#include <map>
#include <deque>
#include <string>
-typedef void* VoidPointer;
-typedef std::map<std::string,char*> ExtensibleStore;
+/** Dummy class to help enforce culls being parent-called up to classbase */
+class CullResult
+{
+ CullResult();
+ friend class classbase;
+};
-extern time_t TIME;
-
-/** The base class for all inspircd classes
-*/
-class classbase
+/** 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:
- /** Time that the object was instantiated (used for TS calculation etc)
- */
- time_t age;
+ classbase();
- /** Constructor,
- * Sets the object's time
+ /**
+ * Called just prior to destruction via cull list.
*/
- classbase() { age = TIME; }
- ~classbase() { }
+ virtual CullResult cull();
+ virtual ~classbase();
+ private:
+ // uncopyable
+ classbase(const classbase&);
+ void operator=(const classbase&);
};
-/** class Extensible is the parent class of many classes such as userrec and chanrec.
- * class Extensible implements a system which allows modules to 'extend' the class by attaching data within
- * a map associated with the object. In this way modules can store their own custom information within user
- * objects, channel objects and server objects, without breaking other modules (this is more sensible than using
- * a flags variable, and each module defining bits within the flag as 'theirs' as it is less prone to conflict and
- * supports arbitary data storage).
+/** The base class for inspircd classes that provide a wrapping interface, and
+ * should only exist while being used. Prevents heap allocation.
*/
-class Extensible : public classbase
+class CoreExport interfacebase
{
- /** Private data store
- */
- ExtensibleStore Extension_Items;
-
-public:
-
- /** Extend an Extensible class.
- *
- * @param key The key parameter is an arbitary string which identifies the extension data
- * @param p This parameter is a pointer to any data you wish to associate with the object
- *
- * You must provide a key to store the data as, and a void* to the data (typedef VoidPointer)
- * The data will be inserted into the map. If the data already exists, you may not insert it
- * twice, Extensible::Extend will return false in this case.
- *
- * @return Returns true on success, false if otherwise
- */
- template<typename T> bool Extend(const std::string &key, T* p)
+ public:
+ interfacebase() {}
+ private:
+ interfacebase(const interfacebase&);
+ void operator=(const interfacebase&);
+ void* operator new(size_t);
+ 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, 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
+{
+ mutable unsigned int refcount;
+ public:
+ refcountbase();
+ virtual ~refcountbase();
+ inline unsigned int GetReferenceCount() const { return refcount; }
+ void* operator new(size_t);
+ 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&);
+};
+
+/** 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
+{
+ 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 reference
+{
+ T* value;
+ public:
+ reference() : value(0) { }
+ 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)
{
- /* This will only add an item if it doesnt already exist,
- * the return value is a std::pair of an iterator to the
- * element, and a bool saying if it was actually inserted.
- */
- return this->Extension_Items.insert(std::make_pair(key, (char*)p)).second;
+ if (other.value)
+ other.value->refcount_inc();
+ this->reference::~reference();
+ value = other.value;
+ return *this;
}
- /** Shrink an Extensible class.
- *
- * @param key The key parameter is an arbitary string which identifies the extension data
- *
- * You must provide a key name. The given key name will be removed from the classes data. If
- * you provide a nonexistent key (case is important) then the function will return false.
- * @return Returns true on success.
- */
- bool Shrink(const std::string &key);
-
- /** Get an extension item.
- *
- * @param key The key parameter is an arbitary string which identifies the extension data
- * @return If you provide a non-existent key name, the function returns NULL, otherwise a pointer to the item referenced by the key is returned.
- */
- template<typename T> bool GetExt(const std::string &key, T* &p)
+ ~reference()
{
- ExtensibleStore::iterator iter = this->Extension_Items.find(key);
- if(iter != this->Extension_Items.end())
- {
- p = (T*)iter->second;
- return true;
- }
- else
- {
- p = NULL;
- return false;
- }
+ if (value && value->refcount_dec())
+ delete value;
}
-
- /** Get a list of all extension items names.
- * @param list A deque of strings to receive the list
- * @return This function writes a list of all extension items stored in this object by name into the given deque and returns void.
- */
- void GetExtList(std::deque<std::string> &list);
+ inline operator bool() const { return value; }
+ 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; }
+ private:
+ void* operator new(size_t);
+ void operator delete(void*);
};
-/** BoolSet is a utility class designed to hold eight bools in a bitmask.
- * Use BoolSet::Set and BoolSet::Get to set and get bools in the bitmask,
- * and Unset and Invert for special operations upon them.
+/** This class can be used on its own to represent an exception, or derived to represent a module-specific exception.
+ * When a module whishes to abort, e.g. within a constructor, it should throw an exception using ModuleException or
+ * a class derived from ModuleException. If a module throws an exception during its constructor, the module will not
+ * be loaded. If this happens, the error message returned by ModuleException::GetReason will be displayed to the user
+ * attempting to load the module, or dumped to the console if the ircd is currently loading for the first time.
*/
-class BoolSet : public classbase
+class CoreExport CoreException : public std::exception
{
- char bits;
-
+ protected:
+ /** Holds the error message to be displayed
+ */
+ const std::string err;
+ /** Source of the exception
+ */
+ const std::string source;
public:
-
- /** The default constructor initializes the BoolSet to all values unset.
+ /** Default constructor, just uses the error mesage 'Core threw an exception'.
*/
- BoolSet();
-
- /** This constructor copies the default bitmask from a char
+ CoreException() : err("Core threw an exception"), source("The core") {}
+ /** This constructor can be used to specify an error message before throwing.
*/
- BoolSet(char bitmask);
-
- /** The Set method sets one bool in the set.
- *
- * @param number The number of the item to set. This must be between 0 and 7.
+ CoreException(const std::string &message) : err(message), source("The core") {}
+ /** This constructor can be used to specify an error message before throwing,
+ * and to specify the source of the exception.
*/
- void Set(int number);
-
- /** The Get method returns the value of one bool in the set
- *
- * @param number The number of the item to retrieve. This must be between 0 and 7.
- *
- * @return True if the item is set, false if it is unset.
+ CoreException(const std::string &message, const std::string &src) : err(message), source(src) {}
+ /** This destructor solves world hunger, cancels the world debt, and causes the world to end.
+ * Actually no, it does nothing. Never mind.
+ * @throws Nothing!
*/
- bool Get(int number);
-
- /** The Unset method unsets one value in the set
- *
- * @param number The number of the item to set. This must be between 0 and 7.
+ 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.
*/
- void Unset(int number);
+ virtual const char* GetReason()
+ {
+ return err.c_str();
+ }
- /** The Unset method inverts (flips) one value in the set
- *
- * @param number The number of the item to invert. This must be between 0 and 7.
- */
- void Invert(int number);
+ virtual const char* GetSource()
+ {
+ return source.c_str();
+ }
+};
- /** Compare two BoolSets
+class CoreExport ModuleException : public CoreException
+{
+ public:
+ /** This constructor can be used to specify an error message before throwing.
*/
- bool operator==(BoolSet other);
+ ModuleException(const std::string &message, Module* me = NULL);
+};
- /** OR two BoolSets together
- */
- BoolSet operator|(BoolSet other);
-
- /** AND two BoolSets together
- */
- BoolSet operator&(BoolSet other);
+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
+};
- /** Assign one BoolSet to another
- */
- bool operator=(BoolSet other);
+/** 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();
};
projects / user / henk / code / inspircd.git / blobdiff