Adding ViroKit. Needs AWSCore :(

mobile/ios/ViroKit.framework/Headers/VROThreadRestricted.h

@@ -0,0 +1,76 @@
+//
+//  VROThreadRestricted.h
+//  ViroRenderer
+//
+//  Created by Raj Advani on 3/30/17.
+//  Copyright © 2017 Viro Media. All rights reserved.
+//
+
+#ifndef VROThreadRestricted_h
+#define VROThreadRestricted_h
+
+#include <stdio.h>
+#include <pthread.h>
+#include <string>
+
+// Utility for printing out an ID for the given pthread
+std::string print_thread_id(pthread_t id);
+
+enum class VROThreadName {
+    Undefined,
+    Renderer
+};
+
+/*
+ Subclasses of VROThreadRestricted may only be accessed from a single thread,
+ identified by its VROThreadName.
+ 
+ The passert_thread() method is provided to assert we're on the thread to which
+ we're restricted.
+ */
+class VROThreadRestricted {
+    
+public:
+
+    /*
+     Associate the current thread with the given VROThreadName.
+     */
+    static void setThread(VROThreadName name);
+    static void unsetThread();
+    static bool isThread(VROThreadName name);
+
+    /*
+     Restrict this object to the thread with the given name. The name must have been set
+     to a thread via setThread(VROThreadName, pthread_t).
+     */
+    VROThreadRestricted(VROThreadName name);
+    virtual ~VROThreadRestricted();
+    
+    /*
+     Assert we are on the correct thread. If not, abort.
+     */
+    void passert_thread();
+    
+    /*
+     Temporarily enable or disable thread checking. When false, passert_thread() is a no-op.
+     */
+    void setThreadRestrictionEnabled(bool enabled) {
+        _enabled = enabled;
+    }
+    
+private:
+
+    /*
+     The name of the thread this object is restricted to.
+     */
+    VROThreadName _restricted_thread_name;
+
+    /*
+     True if thread restriction checking is enabled for this object.
+     When false, passert_thread is a no-op.
+     */
+    bool _enabled;
+    
+};
+
+#endif /* VROThreadRestricted_h */