jens@0: //
jens@0: //  ConcurrentOperation.m
jens@0: //  MYUtilities
jens@0: //
jens@0: //  Created by Jens Alfke on 2/5/08.
jens@0: //  Copyright 2008 Jens Alfke. All rights reserved.
jens@0: //
jens@0: 
jens@0: #import "ConcurrentOperation.h"
jens@0: 
jens@0: // See file:///Developer/Documentation/DocSets/com.apple.ADC_Reference_Library.CoreReference.docset/Contents/Resources/Documents/documentation/Cocoa/Reference/NSOperation_class/Reference/Reference.html#//apple_ref/doc/uid/TP40004591-RH2-DontLinkElementID_4
jens@0: 
jens@0: 
jens@0: @implementation ConcurrentOperation
jens@0: 
jens@0: 
jens@0: - (BOOL) isConcurrent {return YES;}
jens@0: 
jens@0: - (void) main
jens@0: {
jens@0:     Assert(NO,@"Shouldn't call -main method of ConcurrentOperation");
jens@0: }
jens@0: 
jens@0: - (BOOL) isExecuting
jens@0: {
jens@0:     return _isExecuting;
jens@0: }
jens@0: 
jens@0: - (BOOL) isFinished
jens@0: {
jens@0:     return _isFinished;
jens@0: }
jens@0: 
jens@0: - (void) start
jens@0: {
jens@0:     // don't call super!
jens@0:     Log(@"Starting %@",self);
jens@0:     [self willChangeValueForKey: @"isExecuting"];
jens@0:     _isExecuting = YES;
jens@0:     [self didChangeValueForKey: @"isExecuting"];
jens@0: }
jens@0: 
jens@0: - (void) finish
jens@0: {
jens@0:     Log(@"Finished %@",self);
jens@0:     [self willChangeValueForKey: @"isExecuting"];
jens@0:     [self willChangeValueForKey: @"isFinished"];
jens@0:     _isExecuting = NO;
jens@0:     _isFinished = YES;
jens@0:     [self didChangeValueForKey: @"isFinished"];
jens@0:     [self didChangeValueForKey: @"isExecuting"];
jens@0: }
jens@0: 
jens@0: 
jens@0: - (void) cancel
jens@0: {
jens@0:     Log(@"Canceling %@",self);
jens@0:     [super cancel];
jens@0:     if( _isExecuting ) {
jens@0:         [self willChangeValueForKey: @"isExecuting"];
jens@0:         _isExecuting = NO;
jens@0:         [self didChangeValueForKey: @"isExecuting"];
jens@0:     }
jens@0: }
jens@0: 
jens@0: 
jens@0: @end