CTUniqueOperationQueue.h

/*
 * CTUniqueOperationQueue
 *
 * Copyright (C) 2012 - Matt Ronge
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of Central Atomics Inc. nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#import <Foundation/Foundation.h>

@interface CTUniqueOperationQueue : NSOperationQueue

/*!
 * Adds a NSOperation if there isn't already one in the queue with the specified id
 */
- (void)addOperation:(NSOperation *)op withID:(NSString *)aID;

/*!
 * Adds a block operation if there isn't already one in the queue with the specified id
 */
- (void)addOperationWithBlock:(void (^)(void))block withID:(NSString *)aID;

/*!
 * Cancels the operation, if there is one, which matches the specified id
 */
- (void)cancelOperationWithID:(NSString *)anID;

/*!
 * Provides the operation, if there is one, which matches the specified id
 */
- (NSOperation *)operationWithID:(NSString *)anID;

/*!
 * If the provided operation is in the queue, update the priority, otherwise add to the queue with this priority
 */
- (void)addOrSetQueuePriority:(NSOperationQueuePriority)priority operation:(NSOperation *)op withID:(NSString *)anID;

@end