Tuukka Norri avatar Tuukka Norri committed 4971e87

Commented implementation details

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 	if ((self = [super init]))
+		// Apparently two SCNetworkReachabilities are needed to allow both
+		// asynchronous notification and thread safe synchronous checks:
+		//
+		// "It is thread safe in that different threads can allocate and operate 
+		// on different SCF objects. Having two threads operating on the same 
+		// SCF object would be unwise."
+		//
+		// Retrieved from http://lists.apple.com/archives/Macnetworkprog/2005/Jul/msg00042.html
 		mAsyncReachability = reachabilities [0];
 		mSyncReachability  = reachabilities [1];
 		CFRetain (mAsyncReachability);
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