synchronization

How Do I Sync My Sublime Text 3 Settings Using Dropbox?

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I’ve been syncing my Sublime settings for a while between multiple locations, all running OS X. I’ve had some minor problems. Finally, I decided to look into it which led me to what I would consider the authoritative description of how to sync Sublime setting between multiple machines using Dropbox: Sublime Package Control > Docs … Read more

Difference between Hashtable and Collections.synchronizedMap(HashMap)

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One more difference that I can find at the implementation of both the classes is as follows: • The Hashtable class has all its methods synchronized i.e. the locking is done at the method level and hence one can say that the mutex is always at the Hashtable object (this) level. • The method Collections.synchronizedMap(Map) … Read more

Which std::sync::atomic::Ordering to use?

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I’m not an expert on this, and it’s really complicated, so please feel free to critique my post. As pointed out by mdh.heydari, cppreference.com has much better documentation of orderings than Rust (C++ has an almost identical API). For your question You’d need to use “release” ordering in your producer and “acquire” ordering in your … Read more

Do lock-free algorithms really perform better than their lock-full counterparts?

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Beyond the simple cases of the InterlockedXxx functions, it seems like the prevailing pattern with all of these is that they implement their own locks. None of the answers here really seem to get to the heart of the difference between a “lock-free” CAS loop and a mutex or spin-lock. The important difference is that … Read more

How to Synchronize Android Database with an online SQL Server?

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You should take a look at the SampleSyncAdapter project in the Android SDK demos (Transferring Data Using Sync Adapters). It shows you how to do synchronization “Android style”, which requires no user interaction by manually tapping a sync button all the time. On top of that you need to write server software that is able … Read more

Synchronising twice on the same object?

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Reentrant Synchronized blocks use reentrant locks, which means if the thread already holds the lock, it can re-aquire it without problems. Therefore your code will work as you expect. See the bottom of the Java Tutorial page Intrinsic Locks and Synchronization. To quote as of 2015-01… Reentrant Synchronization Recall that a thread cannot acquire a … Read more

Synchronizing on String objects in Java

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Without putting my brain fully into gear, from a quick scan of what you say it looks as though you need to intern() your Strings: final String firstkey = “Data-” + email; final String key = firstkey.intern(); Two Strings with the same value are otherwise not necessarily the same object. Note that this may introduce … Read more

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