initial commit

Example/Pods/ReactiveObjC/ReactiveObjC/RACBehaviorSubject.m

@@ -0,0 +1,56 @@
+//
+//  RACBehaviorSubject.m
+//  ReactiveObjC
+//
+//  Created by Josh Abernathy on 3/16/12.
+//  Copyright (c) 2012 GitHub, Inc. All rights reserved.
+//
+
+#import "RACBehaviorSubject.h"
+#import "RACDisposable.h"
+#import "RACScheduler+Private.h"
+
+@interface RACBehaviorSubject<ValueType> ()
+
+// This property should only be used while synchronized on self.
+@property (nonatomic, strong) ValueType currentValue;
+
+@end
+
+@implementation RACBehaviorSubject
+
+#pragma mark Lifecycle
+
++ (instancetype)behaviorSubjectWithDefaultValue:(id)value {
+	RACBehaviorSubject *subject = [self subject];
+	subject.currentValue = value;
+	return subject;
+}
+
+#pragma mark RACSignal
+
+- (RACDisposable *)subscribe:(id<RACSubscriber>)subscriber {
+	RACDisposable *subscriptionDisposable = [super subscribe:subscriber];
+
+	RACDisposable *schedulingDisposable = [RACScheduler.subscriptionScheduler schedule:^{
+		@synchronized (self) {
+			[subscriber sendNext:self.currentValue];
+		}
+	}];
+	
+	return [RACDisposable disposableWithBlock:^{
+		[subscriptionDisposable dispose];
+		[schedulingDisposable dispose];
+	}];
+}
+
+#pragma mark RACSubscriber
+
+- (void)sendNext:(id)value {
+	@synchronized (self) {
+		self.currentValue = value;
+		[super sendNext:value];
+	}
+}
+
+@end