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/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2008 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 __LOG_H__
#define __LOG_H__
/** Debug levels for use with InspIRCd::Log()
* */
enum DebugLevel
{
DEBUG = 10,
VERBOSE = 20,
DEFAULT = 30,
SPARSE = 40,
NONE = 50
};
/* Forward declaration -- required */
class InspIRCd;
/** This class implements a nonblocking log-writer.
* Most people writing an ircd give little thought to their disk
* i/o. On a congested system, disk writes can block for long
* periods of time (e.g. if the system is busy and/or swapping
* a lot). If we just use a blocking fprintf() call, this could
* block for undesirable amounts of time (half of a second through
* to whole seconds). We DO NOT want this, so we make our logfile
* nonblocking and hook it into the SocketEngine.
* NB: If the operating system does not support nonblocking file
* I/O (linux seems to, as does freebsd) this will default to
* blocking behaviour.
*/
class CoreExport FileLogger : public EventHandler
{
protected:
/** The creator/owner of this object
*/
InspIRCd* ServerInstance;
/** The log file (fd is inside this somewhere,
* we get it out with fileno())
*/
FILE* log;
/** Buffer of pending log lines to be written
*/
std::string buffer;
/** Number of write operations that have occured
*/
int writeops;
public:
/** The constructor takes an already opened logfile.
*/
FileLogger(InspIRCd* Instance, FILE* logfile);
/** This returns false, logfiles are writeable.
*/
virtual bool Readable();
/** Handle pending write events.
* This will flush any waiting data to disk.
* If any data remains after the fprintf call,
* another write event is scheduled to write
* the rest of the data when possible.
*/
virtual void HandleEvent(EventType et, int errornum = 0);
/** Write one or more preformatted log lines.
* If the data cannot be written immediately,
* this class will insert itself into the
* SocketEngine, and register a write event,
* and when the write event occurs it will
* attempt again to write the data.
*/
void WriteLogLine(const std::string &line);
/** Close the log file and cancel any events.
*/
virtual void Close();
/** Close the log file and cancel any events.
* (indirectly call Close()
*/
virtual ~FileLogger();
};
#endif
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