1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/ConcurrentOperation.m	Fri May 02 12:49:43 2008 -0700
     1.3 @@ -0,0 +1,67 @@
     1.4 +//
     1.5 +//  ConcurrentOperation.m
     1.6 +//  MYUtilities
     1.7 +//
     1.8 +//  Created by Jens Alfke on 2/5/08.
     1.9 +//  Copyright 2008 Jens Alfke. All rights reserved.
    1.10 +//
    1.11 +
    1.12 +#import "ConcurrentOperation.h"
    1.13 +
    1.14 +// 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
    1.15 +
    1.16 +
    1.17 +@implementation ConcurrentOperation
    1.18 +
    1.19 +
    1.20 +- (BOOL) isConcurrent {return YES;}
    1.21 +
    1.22 +- (void) main
    1.23 +{
    1.24 +    Assert(NO,@"Shouldn't call -main method of ConcurrentOperation");
    1.25 +}
    1.26 +
    1.27 +- (BOOL) isExecuting
    1.28 +{
    1.29 +    return _isExecuting;
    1.30 +}
    1.31 +
    1.32 +- (BOOL) isFinished
    1.33 +{
    1.34 +    return _isFinished;
    1.35 +}
    1.36 +
    1.37 +- (void) start
    1.38 +{
    1.39 +    // don't call super!
    1.40 +    Log(@"Starting %@",self);
    1.41 +    [self willChangeValueForKey: @"isExecuting"];
    1.42 +    _isExecuting = YES;
    1.43 +    [self didChangeValueForKey: @"isExecuting"];
    1.44 +}
    1.45 +
    1.46 +- (void) finish
    1.47 +{
    1.48 +    Log(@"Finished %@",self);
    1.49 +    [self willChangeValueForKey: @"isExecuting"];
    1.50 +    [self willChangeValueForKey: @"isFinished"];
    1.51 +    _isExecuting = NO;
    1.52 +    _isFinished = YES;
    1.53 +    [self didChangeValueForKey: @"isFinished"];
    1.54 +    [self didChangeValueForKey: @"isExecuting"];
    1.55 +}
    1.56 +
    1.57 +
    1.58 +- (void) cancel
    1.59 +{
    1.60 +    Log(@"Canceling %@",self);
    1.61 +    [super cancel];
    1.62 +    if( _isExecuting ) {
    1.63 +        [self willChangeValueForKey: @"isExecuting"];
    1.64 +        _isExecuting = NO;
    1.65 +        [self didChangeValueForKey: @"isExecuting"];
    1.66 +    }
    1.67 +}
    1.68 +
    1.69 +
    1.70 +@end