ObjFW  Artifact [9409a555ca]

Artifact 9409a555ca761415d019afe3c11993dbea9e4e14511e6ba9d7701fb5d5bbc2ec:

• File src/exceptions/OFListenFailedException.h — part of check-in [62e2de30b9] at 2015-02-16 08:39:17 on branch trunk — Explicitly pass errno to exceptions

  The old behaviour where the exception would access errno directly on
  creation of the exception was very fragile. The two main problems with
  it were that sometimes it would pick up an errno even though none had
  been set and in other cases that when the exception was created errno
  had already been overridden.

  This also greatly increases errno handling on Win32, especially in
  conjunction with sockets. It can still be improved further, though. (user: js, size: 2149) [annotate] [blame] [check-ins using]

/*
 * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015
 *   Jonathan Schleifer <js@webkeks.org>
 *
 * All rights reserved.
 *
 * This file is part of ObjFW. It may be distributed under the terms of the
 * Q Public License 1.0, which can be found in the file LICENSE.QPL included in
 * the packaging of this file.
 *
 * Alternatively, it may be distributed under the terms of the GNU General
 * Public License, either version 2 or 3, which can be found in the file
 * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
 * file.
 */

#import "OFException.h"

#ifndef OF_HAVE_SOCKETS
# error No sockets available!
#endif

/*!
 * @class OFListenFailedException \
 *	  OFListenFailedException.h ObjFW/OFListenFailedException.h
 *
 * @brief An exception indicating that listening on the socket failed.
 */
@interface OFListenFailedException: OFException
{
	id _socket;
	int _backLog, _errNo;
}

#ifdef OF_HAVE_PROPERTIES
@property (readonly, retain) id socket;
@property (readonly) int backLog, errNo;
#endif

/*!
 * @brief Creates a new, autoreleased listen failed exception.
 *
 * @param socket The socket which failed to listen
 * @param backLog The requested size of the back log
 * @param errNo The errno of the error
 * @return A new, autoreleased listen failed exception
 */
+ (instancetype)exceptionWithSocket: (id)socket
			    backLog: (int)backLog
			      errNo: (int)errNo;

/*!
 * @brief Initializes an already allocated listen failed exception
 *
 * @param socket The socket which failed to listen
 * @param backLog The requested size of the back log
 * @param errNo The errno of the error
 * @return An initialized listen failed exception
 */
- initWithSocket: (id)socket
	 backLog: (int)backLog
	   errNo: (int)errNo;

/*!
 * @brief Returns the socket which failed to listen.
 *
 * @return The socket which failed to listen
 */
- (id)socket;

/*!
 * @brief Returns the requested back log.
 *
 * @return The requested back log
 */
- (int)backLog;

/*!
 * @brief Returns the errno from when the exception was created.
 *
 * @return The errno from when the exception was created
 */
- (int)errNo;
@end