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54 lines
940 B
Objective-C
54 lines
940 B
Objective-C
#import "SMetaDisposable.h"
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#import <libkern/OSAtomic.h>
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@interface SMetaDisposable ()
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{
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OSSpinLock _lock;
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bool _disposed;
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id<SDisposable> _disposable;
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}
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@end
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@implementation SMetaDisposable
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- (void)setDisposable:(id<SDisposable>)disposable
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{
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id<SDisposable> previousDisposable = nil;
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bool dispose = false;
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OSSpinLockLock(&_lock);
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dispose = _disposed;
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if (!dispose)
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{
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previousDisposable = _disposable;
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_disposable = disposable;
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}
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OSSpinLockUnlock(&_lock);
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if (previousDisposable != nil)
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[previousDisposable dispose];
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if (dispose)
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[disposable dispose];
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}
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- (void)dispose
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{
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id<SDisposable> disposable = nil;
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OSSpinLockLock(&_lock);
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if (!_disposed)
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{
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disposable = _disposable;
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_disposed = true;
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}
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OSSpinLockUnlock(&_lock);
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if (disposable != nil)
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[disposable dispose];
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}
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@end
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