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/* Cydia - iPhone UIKit Front-End for Debian APT
* Copyright (C) 2008-2012 Jay Freeman (saurik)
*/
/* GNU General Public License, Version 3 {{{ */
/*
* Cydia is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published
* by the Free Software Foundation, either version 3 of the License,
* or (at your option) any later version.
*
* Cydia is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Cydia. If not, see <http://www.gnu.org/licenses/>.
**/
/* }}} */
#include "Menes/yieldToSelector.h"
@implementation NSObject (MenesYieldToSelector)
- (void) doNothing {
}
- (void) _yieldToContext:(NSMutableArray *)context {
NSAutoreleasePool *pool([[NSAutoreleasePool alloc] init]);
SEL selector(reinterpret_cast<SEL>([[context objectAtIndex:0] pointerValue]));
id object([[context objectAtIndex:1] nonretainedObjectValue]);
volatile bool &stopped(*reinterpret_cast<bool *>([[context objectAtIndex:2] pointerValue]));
/* XXX: deal with exceptions */
id value([self performSelector:selector withObject:object]);
NSMethodSignature *signature([self methodSignatureForSelector:selector]);
[context removeAllObjects];
if ([signature methodReturnLength] != 0 && value != nil)
[context addObject:value];
stopped = true;
[self
performSelectorOnMainThread:@selector(doNothing)
withObject:nil
waitUntilDone:NO
];
[pool release];
}
- (id) yieldToSelector:(SEL)selector withObject:(id)object {
volatile bool stopped(false);
NSMutableArray *context([NSMutableArray arrayWithObjects:
[NSValue valueWithPointer:selector],
[NSValue valueWithNonretainedObject:object],
[NSValue valueWithPointer:const_cast<bool *>(&stopped)],
nil]);
NSThread *thread([[[NSThread alloc]
initWithTarget:self
selector:@selector(_yieldToContext:)
object:context
] autorelease]);
[thread start];
NSRunLoop *loop([NSRunLoop currentRunLoop]);
NSDate *future([NSDate distantFuture]);
NSString *mode([loop currentMode] ?: NSDefaultRunLoopMode);
while (!stopped && [loop runMode:mode beforeDate:future]);
return [context count] == 0 ? nil : [context objectAtIndex:0];
}
- (id) yieldToSelector:(SEL)selector {
return [self yieldToSelector:selector withObject:nil];
}
@end
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