0001-Runtime-checks-are-required-for-multi-tasking-on-iOS.patch

From 3d40a3907187800559626589aab0b3263e3777ad Mon Sep 17 00:00:00 2001
From: Luke Redpath <luke@lukeredpath.co.uk>
Date: Mon, 23 Aug 2010 19:57:36 +0100
Subject: [PATCH] Runtime checks are required for multi-tasking on iOS3 devices

---
 Classes/ASIHTTPRequest/ASIHTTPRequest.m |   13 +++++++++++--
 1 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/Classes/ASIHTTPRequest/ASIHTTPRequest.m b/Classes/ASIHTTPRequest/ASIHTTPRequest.m
index 90c5974..9a05801 100644
--- a/Classes/ASIHTTPRequest/ASIHTTPRequest.m
+++ b/Classes/ASIHTTPRequest/ASIHTTPRequest.m
@@ -637,6 +637,15 @@ static NSOperationQueue *sharedQueue = nil;
 
 #pragma mark request logic
 
+BOOL isMultitaskingSupported()
+{
+  BOOL multiTaskingSupported = NO;
+  if ([[UIDevice currentDevice] respondsToSelector:@selector(isMultitaskingSupported)]) {
+    multiTaskingSupported = [[UIDevice currentDevice] isMultitaskingSupported];
+  }
+  return multiTaskingSupported;
+}
+
 // Create the request
 - (void)main
 {
@@ -645,7 +654,7 @@ static NSOperationQueue *sharedQueue = nil;
 		[[self cancelledLock] lock];
 		
 		#if TARGET_OS_IPHONE && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_4_0
-		if ([[UIDevice currentDevice] isMultitaskingSupported] && [self shouldContinueWhenAppEntersBackground]) {
+		if (isMultitaskingSupported() && [self shouldContinueWhenAppEntersBackground]) {
 			backgroundTask = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:^{
 				// Synchronize the cleanup call on the main thread in case
 				// the task actually finishes at around the same time.
@@ -2922,7 +2931,7 @@ static NSOperationQueue *sharedQueue = nil;
 	CFRunLoopStop(CFRunLoopGetCurrent());
 
 	#if TARGET_OS_IPHONE && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_4_0
-	if ([[UIDevice currentDevice] isMultitaskingSupported] && [self shouldContinueWhenAppEntersBackground]) {
+	if (isMultitaskingSupported() && [self shouldContinueWhenAppEntersBackground]) {
 		dispatch_async(dispatch_get_main_queue(), ^{
 			if (backgroundTask != UIBackgroundTaskInvalid) {
 				[[UIApplication sharedApplication] endBackgroundTask:backgroundTask];
-- 
1.7.0.6