Add the SPMediaKeyTap thirdparty lib.

thirdparty/SPMediaKeyTap/SPInvocationGrabbing/NSObject+SPInvocationGrabbing.m

@@ -0,0 +1,128 @@
+#import "NSObject+SPInvocationGrabbing.h"
+#import <execinfo.h>
+
+#pragma mark Invocation grabbing
+@interface SPInvocationGrabber ()
+@property (readwrite, retain, nonatomic) id object;
+@property (readwrite, retain, nonatomic) NSInvocation *invocation;
+
+@end
+
+@implementation SPInvocationGrabber
+- (id)initWithObject:(id)obj;
+{
+	return [self initWithObject:obj stacktraceSaving:YES];
+}
+
+-(id)initWithObject:(id)obj stacktraceSaving:(BOOL)saveStack;
+{
+	self.object = obj;
+
+	if(saveStack)
+		[self saveBacktrace];
+
+	return self;
+}
+-(void)dealloc;
+{
+	free(frameStrings);
+	self.object = nil;
+	self.invocation = nil;
+	[super dealloc];
+}
+@synthesize invocation = _invocation, object = _object;
+
+@synthesize backgroundAfterForward, onMainAfterForward, waitUntilDone;
+- (void)runInBackground;
+{
+	NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
+	@try {
+		[self invoke];
+	}
+	@finally {
+		[pool drain];
+	}
+}
+
+
+- (void)forwardInvocation:(NSInvocation *)anInvocation {
+	[anInvocation retainArguments];
+	anInvocation.target = _object;
+	self.invocation = anInvocation;
+	
+	if(backgroundAfterForward)
+		[NSThread detachNewThreadSelector:@selector(runInBackground) toTarget:self withObject:nil];
+	else if(onMainAfterForward)
+        [self performSelectorOnMainThread:@selector(invoke) withObject:nil waitUntilDone:waitUntilDone];
+}
+- (NSMethodSignature *)methodSignatureForSelector:(SEL)inSelector {
+	NSMethodSignature *signature = [super methodSignatureForSelector:inSelector];
+	if (signature == NULL)
+		signature = [_object methodSignatureForSelector:inSelector];
+    
+	return signature;
+}
+
+- (void)invoke;
+{
+
+	@try {
+		[_invocation invoke];
+	}
+	@catch (NSException * e) {
+		NSLog(@"SPInvocationGrabber's target raised %@:\n\t%@\nInvocation was originally scheduled at:", e.name, e);
+		[self printBacktrace];
+		printf("\n");
+		[e raise];
+	}
+
+	self.invocation = nil;
+	self.object = nil;
+}
+
+-(void)saveBacktrace;
+{
+  void *backtraceFrames[128];
+  frameCount = backtrace(&backtraceFrames[0], 128);
+  frameStrings = backtrace_symbols(&backtraceFrames[0], frameCount);
+}
+-(void)printBacktrace;
+{
+  int x;
+  for(x = 3; x < frameCount; x++) {
+    if(frameStrings[x] == NULL) { break; }
+    printf("%s\n", frameStrings[x]);
+  }
+}
+@end
+
+@implementation NSObject (SPInvocationGrabbing)
+-(id)grab;
+{
+	return [[[SPInvocationGrabber alloc] initWithObject:self] autorelease];
+}
+-(id)invokeAfter:(NSTimeInterval)delta;
+{
+	id grabber = [self grab];
+	[NSTimer scheduledTimerWithTimeInterval:delta target:grabber selector:@selector(invoke) userInfo:nil repeats:NO];
+	return grabber;
+}
+- (id)nextRunloop;
+{
+	return [self invokeAfter:0];
+}
+-(id)inBackground;
+{
+    SPInvocationGrabber *grabber = [self grab];
+	grabber.backgroundAfterForward = YES;
+	return grabber;
+}
+-(id)onMainAsync:(BOOL)async;
+{
+    SPInvocationGrabber *grabber = [self grab];
+	grabber.onMainAfterForward = YES;
+    grabber.waitUntilDone = !async;
+	return grabber;
+}
+
+@end