From bab14f0dd2345c9d7dcbc47c918563709e1ac094 Mon Sep 17 00:00:00 2001 From: peavey Date: Mon, 16 Jul 2007 17:14:45 +0000 Subject: 'svn propset -R svn:eol-style CR *' Set to UNIX-style always. Binaries are auto skipped by svn. git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@7454 e03df62e-2008-0410-955e-edbf42e46eb7 --- include/socketengine.h | 297 +------------------------------------------------ 1 file changed, 1 insertion(+), 296 deletions(-) (limited to 'include/socketengine.h') diff --git a/include/socketengine.h b/include/socketengine.h index ce701beff..e34aa3941 100644 --- a/include/socketengine.h +++ b/include/socketengine.h @@ -1,296 +1 @@ -/* +------------------------------------+ - * | Inspire Internet Relay Chat Daemon | - * +------------------------------------+ - * - * 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 __SOCKETENGINE__ -#define __SOCKETENGINE__ - -#include -#include -#include -#include "inspircd_config.h" -#include "base.h" - -/** Types of event an EventHandler may receive. - * EVENT_READ is a readable file descriptor, - * and EVENT_WRITE is a writeable file descriptor. - * EVENT_ERROR can always occur, and indicates - * a write error or read error on the socket, - * e.g. EOF condition or broken pipe. - */ -enum EventType -{ - /** Read event */ - EVENT_READ = 0, - /** Write event */ - EVENT_WRITE = 1, - /** Error event */ - EVENT_ERROR = 2 -}; - -class InspIRCd; - -/** This class is a basic I/O handler class. - * Any object which wishes to receive basic I/O events - * from the socketengine must derive from this class and - * implement the HandleEvent() method. The derived class - * must then be added to SocketEngine using the method - * SocketEngine::AddFd(), after which point the derived - * class will receive events to its HandleEvent() method. - * The derived class should also implement one of Readable() - * and Writeable(). In the current implementation, only - * Readable() is used. If this returns true, the socketengine - * inserts a readable socket. If it is false, the socketengine - * inserts a writeable socket. The derived class should never - * change the value this function returns without first - * deleting the socket from the socket engine. The only - * requirement beyond this for an event handler is that it - * must have a file descriptor. What this file descriptor - * is actually attached to is completely up to you. - */ -class CoreExport EventHandler : public Extensible -{ - protected: - /** File descriptor. - * All events which can be handled - * must have a file descriptor. - * This allows you to add events for - * sockets, fifo's, pipes, and various - * other forms of IPC. - */ - int fd; - public: - /** Get the current file descriptor - * @return The file descriptor of this handler - */ - int GetFd(); - - /** Set a new file desciptor - * @param FD The new file descriptor. Do not - * call this method without first deleting the - * object from the SocketEngine if you have - * added it to a SocketEngine instance. - */ - void SetFd(int FD); - - /** Constructor - */ - EventHandler() {} - - /** Destructor - */ - virtual ~EventHandler() {} - - /** Override this function to indicate readability. - * @return This should return true if the function - * wishes to receive EVENT_READ events. Do not change - * what this function returns while the event handler - * is still added to a SocketEngine instance! - * If this function is unimplemented, the base class - * will return true. - * - * NOTE: You cannot set both Readable() and - * Writeable() to true. If you wish to receive - * a write event for your object, you must call - * SocketEngine::WantWrite() instead. This will - * trigger your objects next EVENT_WRITE type event. - */ - virtual bool Readable(); - - /** Override this function to indicate writeability. - * @return This should return true if the function - * wishes to receive EVENT_WRITE events. Do not change - * what this function returns while the event handler - * is still added to a SocketEngine instance! - * If this function is unimplemented, the base class - * will return false. - * - * NOTE: You cannot set both Readable() and - * Writeable() to true. If you wish to receive - * a write event for your object, you must call - * SocketEngine::WantWrite() instead. This will - * trigger your objects next EVENT_WRITE type event. - */ - virtual bool Writeable(); - - /** Process an I/O event. - * You MUST implement this function in your derived - * class, and it will be called whenever read or write - * events are received, depending on what your functions - * Readable() and Writeable() returns and wether you - * previously made a call to SocketEngine::WantWrite(). - * @param et either one of EVENT_READ for read events, - * and EVENT_WRITE for write events. - */ - virtual void HandleEvent(EventType et, int errornum = 0) = 0; - -#ifdef WINDOWS - - /** "Fake" file descriptor. This is windows-specific. - */ - int m_internalFd; - - /** Pointer to read event. We delete this so the buffer can't be used - * after the socket is deleted, and so it doesn't leak memory - */ - void* m_readEvent; - /** Pointer to a write event. - */ - void* m_writeEvent; - /** Pointer to an accept event. - */ - void* m_acceptEvent; - -#endif -}; - -/** Provides basic file-descriptor-based I/O support. - * The actual socketengine class presents the - * same interface on all operating systems, but - * its private members and internal behaviour - * should be treated as blackboxed, and vary - * from system to system and upon the config - * settings chosen by the server admin. The current - * version supports select, epoll and kqueue. - * The configure script will enable a socket engine - * based upon what OS is detected, and will derive - * a class from SocketEngine based upon what it finds. - * The derived classes file will also implement a - * classfactory, SocketEngineFactory, which will - * create a derived instance of SocketEngine using - * polymorphism so that the core and modules do not - * have to be aware of which SocketEngine derived - * class they are using. - */ -class CoreExport SocketEngine : public Extensible -{ -protected: - /** Owner/Creator - */ - InspIRCd* ServerInstance; - /** Handle to socket engine, where needed. - */ - int EngineHandle; - /** Current number of descriptors in the engine - */ - int CurrentSetSize; - /** Reference table, contains all current handlers - */ - EventHandler* ref[MAX_DESCRIPTORS]; -public: - - /** Constructor. - * The constructor transparently initializes - * the socket engine which the ircd is using. - * Please note that if there is a catastrophic - * failure (for example, you try and enable - * epoll on a 2.4 linux kernel) then this - * function may bail back to the shell. - * @param Instance The creator/owner of this object - */ - SocketEngine(InspIRCd* Instance); - - /** Destructor. - * The destructor transparently tidies up - * any resources used by the socket engine. - */ - virtual ~SocketEngine(); - - /** Add an EventHandler object to the engine. - * Use AddFd to add a file descriptor to the - * engine and have the socket engine monitor - * it. You must provide an object derived from - * EventHandler which implements HandleEvent() - * and optionally Readable() and Writeable(). - * @param eh An event handling object to add - */ - virtual bool AddFd(EventHandler* eh); - - /** If you call this function and pass it an - * event handler, that event handler will - * receive the next available write event, - * even if the socket is a readable socket only. - * Developers should avoid constantly keeping - * an eventhandler in the writeable state, - * as this will consume large amounts of - * CPU time. - * @param eh An event handler which wants to - * receive the next writeability event. - */ - virtual void WantWrite(EventHandler* eh); - - /** Returns the maximum number of file descriptors - * you may store in the socket engine at any one time. - * @return The maximum fd value - */ - virtual int GetMaxFds(); - - /** Returns the number of file descriptor slots - * which are available for storing fds. - * @return The number of remaining fd's - */ - virtual int GetRemainingFds(); - - /** Delete an event handler from the engine. - * This function call deletes an EventHandler - * from the engine, returning true if it succeeded - * and false if it failed. This does not free the - * EventHandler pointer using delete, if this is - * required you must do this yourself. - * Note on forcing deletes. DO NOT DO THIS! This is - * extremely dangerous and will most likely render the - * socketengine dead. This was added only for handling - * very rare cases where broken 3rd party libs destroys - * the OS socket beyond our control. If you can't explain - * in minute details why forcing is absolutely necessary - * then you don't need it. That was a NO! - * @param eh The event handler object to remove - * @param force *DANGEROUS* See method description! - * @return True if the event handler was removed - */ - virtual bool DelFd(EventHandler* eh, bool force = false); - - /** Returns true if a file descriptor exists in - * the socket engine's list. - * @param fd The event handler to look for - * @return True if this fd has an event handler - */ - virtual bool HasFd(int fd); - - /** Returns the EventHandler attached to a specific fd. - * If the fd isnt in the socketengine, returns NULL. - * @param fd The event handler to look for - * @return A pointer to the event handler, or NULL - */ - virtual EventHandler* GetRef(int fd); - - /** Waits for events and dispatches them to handlers. - * Please note that this doesnt wait long, only - * a couple of milliseconds. It returns the number of - * events which occured during this call. - * This method will dispatch events to their handlers - * by calling their EventHandler::HandleEvent() - * methods with the neccessary EventType value. - * @return The number of events which have occured. - */ - virtual int DispatchEvents(); - - /** Returns the socket engines name. - * This returns the name of the engine for use - * in /VERSION responses. - * @return The socket engine name - */ - virtual std::string GetName(); -}; - -#endif - +/* +------------------------------------+ * | Inspire Internet Relay Chat Daemon | * +------------------------------------+ * * 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 __SOCKETENGINE__ #define __SOCKETENGINE__ #include #include #include #include "inspircd_config.h" #include "base.h" /** Types of event an EventHandler may receive. * EVENT_READ is a readable file descriptor, * and EVENT_WRITE is a writeable file descriptor. * EVENT_ERROR can always occur, and indicates * a write error or read error on the socket, * e.g. EOF condition or broken pipe. */ enum EventType { /** Read event */ EVENT_READ = 0, /** Write event */ EVENT_WRITE = 1, /** Error event */ EVENT_ERROR = 2 }; class InspIRCd; /** This class is a basic I/O handler class. * Any object which wishes to receive basic I/O events * from the socketengine must derive from this class and * implement the HandleEvent() method. The derived class * must then be added to SocketEngine using the method * SocketEngine::AddFd(), after which point the derived * class will receive events to its HandleEvent() method. * The derived class should also implement one of Readable() * and Writeable(). In the current implementation, only * Readable() is used. If this returns true, the socketengine * inserts a readable socket. If it is false, the socketengine * inserts a writeable socket. The derived class should never * change the value this function returns without first * deleting the socket from the socket engine. The only * requirement beyond this for an event handler is that it * must have a file descriptor. What this file descriptor * is actually attached to is completely up to you. */ class CoreExport EventHandler : public Extensible { protected: /** File descriptor. * All events which can be handled * must have a file descriptor. * This allows you to add events for * sockets, fifo's, pipes, and various * other forms of IPC. */ int fd; public: /** Get the current file descriptor * @return The file descriptor of this handler */ int GetFd(); /** Set a new file desciptor * @param FD The new file descriptor. Do not * call this method without first deleting the * object from the SocketEngine if you have * added it to a SocketEngine instance. */ void SetFd(int FD); /** Constructor */ EventHandler() {} /** Destructor */ virtual ~EventHandler() {} /** Override this function to indicate readability. * @return This should return true if the function * wishes to receive EVENT_READ events. Do not change * what this function returns while the event handler * is still added to a SocketEngine instance! * If this function is unimplemented, the base class * will return true. * * NOTE: You cannot set both Readable() and * Writeable() to true. If you wish to receive * a write event for your object, you must call * SocketEngine::WantWrite() instead. This will * trigger your objects next EVENT_WRITE type event. */ virtual bool Readable(); /** Override this function to indicate writeability. * @return This should return true if the function * wishes to receive EVENT_WRITE events. Do not change * what this function returns while the event handler * is still added to a SocketEngine instance! * If this function is unimplemented, the base class * will return false. * * NOTE: You cannot set both Readable() and * Writeable() to true. If you wish to receive * a write event for your object, you must call * SocketEngine::WantWrite() instead. This will * trigger your objects next EVENT_WRITE type event. */ virtual bool Writeable(); /** Process an I/O event. * You MUST implement this function in your derived * class, and it will be called whenever read or write * events are received, depending on what your functions * Readable() and Writeable() returns and wether you * previously made a call to SocketEngine::WantWrite(). * @param et either one of EVENT_READ for read events, * and EVENT_WRITE for write events. */ virtual void HandleEvent(EventType et, int errornum = 0) = 0; #ifdef WINDOWS /** "Fake" file descriptor. This is windows-specific. */ int m_internalFd; /** Pointer to read event. We delete this so the buffer can't be used * after the socket is deleted, and so it doesn't leak memory */ void* m_readEvent; /** Pointer to a write event. */ void* m_writeEvent; /** Pointer to an accept event. */ void* m_acceptEvent; #endif }; /** Provides basic file-descriptor-based I/O support. * The actual socketengine class presents the * same interface on all operating systems, but * its private members and internal behaviour * should be treated as blackboxed, and vary * from system to system and upon the config * settings chosen by the server admin. The current * version supports select, epoll and kqueue. * The configure script will enable a socket engine * based upon what OS is detected, and will derive * a class from SocketEngine based upon what it finds. * The derived classes file will also implement a * classfactory, SocketEngineFactory, which will * create a derived instance of SocketEngine using * polymorphism so that the core and modules do not * have to be aware of which SocketEngine derived * class they are using. */ class CoreExport SocketEngine : public Extensible { protected: /** Owner/Creator */ InspIRCd* ServerInstance; /** Handle to socket engine, where needed. */ int EngineHandle; /** Current number of descriptors in the engine */ int CurrentSetSize; /** Reference table, contains all current handlers */ EventHandler* ref[MAX_DESCRIPTORS]; public: /** Constructor. * The constructor transparently initializes * the socket engine which the ircd is using. * Please note that if there is a catastrophic * failure (for example, you try and enable * epoll on a 2.4 linux kernel) then this * function may bail back to the shell. * @param Instance The creator/owner of this object */ SocketEngine(InspIRCd* Instance); /** Destructor. * The destructor transparently tidies up * any resources used by the socket engine. */ virtual ~SocketEngine(); /** Add an EventHandler object to the engine. * Use AddFd to add a file descriptor to the * engine and have the socket engine monitor * it. You must provide an object derived from * EventHandler which implements HandleEvent() * and optionally Readable() and Writeable(). * @param eh An event handling object to add */ virtual bool AddFd(EventHandler* eh); /** If you call this function and pass it an * event handler, that event handler will * receive the next available write event, * even if the socket is a readable socket only. * Developers should avoid constantly keeping * an eventhandler in the writeable state, * as this will consume large amounts of * CPU time. * @param eh An event handler which wants to * receive the next writeability event. */ virtual void WantWrite(EventHandler* eh); /** Returns the maximum number of file descriptors * you may store in the socket engine at any one time. * @return The maximum fd value */ virtual int GetMaxFds(); /** Returns the number of file descriptor slots * which are available for storing fds. * @return The number of remaining fd's */ virtual int GetRemainingFds(); /** Delete an event handler from the engine. * This function call deletes an EventHandler * from the engine, returning true if it succeeded * and false if it failed. This does not free the * EventHandler pointer using delete, if this is * required you must do this yourself. * Note on forcing deletes. DO NOT DO THIS! This is * extremely dangerous and will most likely render the * socketengine dead. This was added only for handling * very rare cases where broken 3rd party libs destroys * the OS socket beyond our control. If you can't explain * in minute details why forcing is absolutely necessary * then you don't need it. That was a NO! * @param eh The event handler object to remove * @param force *DANGEROUS* See method description! * @return True if the event handler was removed */ virtual bool DelFd(EventHandler* eh, bool force = false); /** Returns true if a file descriptor exists in * the socket engine's list. * @param fd The event handler to look for * @return True if this fd has an event handler */ virtual bool HasFd(int fd); /** Returns the EventHandler attached to a specific fd. * If the fd isnt in the socketengine, returns NULL. * @param fd The event handler to look for * @return A pointer to the event handler, or NULL */ virtual EventHandler* GetRef(int fd); /** Waits for events and dispatches them to handlers. * Please note that this doesnt wait long, only * a couple of milliseconds. It returns the number of * events which occured during this call. * This method will dispatch events to their handlers * by calling their EventHandler::HandleEvent() * methods with the neccessary EventType value. * @return The number of events which have occured. */ virtual int DispatchEvents(); /** Returns the socket engines name. * This returns the name of the engine for use * in /VERSION responses. * @return The socket engine name */ virtual std::string GetName(); }; #endif \ No newline at end of file -- cgit v1.2.3