From e867c922a7e2d37b92fd6f5da17d6aa9d99badc5 Mon Sep 17 00:00:00 2001
From: Oliver Letterer <oliver.letterer@gmail.com>
Date: Thu, 15 Aug 2013 22:36:48 +0200
Subject: [PATCH 1/2] Making AFHTTPRequestOperation.HTTPError atomic.

---
 AFNetworking/AFHTTPRequestOperation.m | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/AFNetworking/AFHTTPRequestOperation.m b/AFNetworking/AFHTTPRequestOperation.m
index be49c21..47ef4bc 100644
--- a/AFNetworking/AFHTTPRequestOperation.m
+++ b/AFNetworking/AFHTTPRequestOperation.m
@@ -110,7 +110,7 @@ static void AFSwizzleClassMethodWithClassAndSelectorUsingBlock(Class klass, SEL
 @interface AFHTTPRequestOperation ()
 @property (readwrite, nonatomic, strong) NSURLRequest *request;
 @property (readwrite, nonatomic, strong) NSHTTPURLResponse *response;
-@property (readwrite, nonatomic, strong) NSError *HTTPError;
+@property (readwrite, strong) NSError *HTTPError;
 @end
 
 @implementation AFHTTPRequestOperation

From c4d8a124966883389008410ed9895b448e68a4c1 Mon Sep 17 00:00:00 2001
From: Oliver Letterer <oliver.letterer@gmail.com>
Date: Tue, 20 Aug 2013 10:04:31 +0200
Subject: [PATCH 2/2] Now using AFURLConnectionOperation.lock for
 AFHTTPRequestOperation.HTTPError

---
 AFNetworking/AFHTTPRequestOperation.m | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/AFNetworking/AFHTTPRequestOperation.m b/AFNetworking/AFHTTPRequestOperation.m
index 47ef4bc..324652b 100644
--- a/AFNetworking/AFHTTPRequestOperation.m
+++ b/AFNetworking/AFHTTPRequestOperation.m
@@ -108,6 +108,7 @@ static void AFSwizzleClassMethodWithClassAndSelectorUsingBlock(Class klass, SEL
 #pragma mark -
 
 @interface AFHTTPRequestOperation ()
+@property (readwrite, nonatomic, strong) NSRecursiveLock *lock;
 @property (readwrite, nonatomic, strong) NSURLRequest *request;
 @property (readwrite, nonatomic, strong) NSHTTPURLResponse *response;
 @property (readwrite, strong) NSError *HTTPError;
@@ -117,9 +118,28 @@ static void AFSwizzleClassMethodWithClassAndSelectorUsingBlock(Class klass, SEL
 @synthesize HTTPError = _HTTPError;
 @synthesize successCallbackQueue = _successCallbackQueue;
 @synthesize failureCallbackQueue = _failureCallbackQueue;
+@dynamic lock;
 @dynamic request;
 @dynamic response;
 
+- (NSError *)HTTPError
+{
+    [self.lock lock];
+    NSError *HTTPError = _HTTPError;
+    [self.lock unlock];
+    
+    return HTTPError;
+}
+
+- (void)setHTTPError:(NSError *)HTTPError
+{
+    [self.lock lock];
+    if (HTTPError != _HTTPError) {
+        _HTTPError = HTTPError;
+    }
+    [self.lock unlock];
+}
+
 - (void)dealloc {
     if (_successCallbackQueue) {
 #if !OS_OBJECT_USE_OBJC