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//
// KSThreadProxy.h
//
// Copyright (c) 2008-2012 Mike Abdullah and Karelia Software
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * 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.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 MIKE ABDULLAH OR KARELIA SOFTWARE 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 NSObject (KSThreadProxy)

// Any messages sent to the returned proxy object are neatly forwarded onto the
// real object using the desired thread. You'll even get the return value back properly.
// For convenience, can specify nil to target the main thread.
//
// Example:
// NSString *foo = [[self ks_proxyOnThread:nil] foo];
//
- (id)ks_proxyOnThread:(NSThread *)thread;

// The default behaviour is to wait until done so that return values can be used. If
// targetting a void returning method (or method whose result you don't care about), can
// turn off waitUntilDone to avoid blocking.
- (id)ks_proxyOnThread:(NSThread *)thread waitUntilDone:(BOOL)waitUntilDone;

@end


// Just for fun, a macro that gives you a proxy to NSWorkspace on the main thread
#define KSWORKSPACETHREADPROXY [[[NSWorkspace ks_proxyOnThread:nil] sharedWorkspace] ks_proxyOnThread:nil]


#ifdef NS_BLOCKS_AVAILABLE
@interface NSThread (KSThreadProxy)

// Like dispatch_sync, but copes with the current thread being the same as the one targeted
// Think of it is as a modern equivelant to -performSelector:onThread:withObject:waitUntilDone:
- (void)ks_performBlockAndWait:(void (^)())block;

@end
#endif
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