c# Programming Glossary: interlocked.compareexchangeThreadsafe collection without lock http://stackoverflow.com/questions/10675400/threadsafe-collection-without-lock Initialize global collection through a volatile write. Interlocked.CompareExchange ref collection new List string null public void AddString string.. true Volatile read of global collection. var original Interlocked.CompareExchange ref collection null null Add new string to a local copy. var.. collection unless outraced by another thread. var result Interlocked.CompareExchange ref collection copy original if result original break public..
http://stackoverflow.com/questions/1320621/throw-a-nullreferenceexception-while-calling-the-set-item-method-of-a-dictionary get if _InternalSyncObject null var @object new object Interlocked.CompareExchange ref _InternalSyncObject @object null return _InternalSyncObject..
Does Interlocked.CompareExchange use a memory barrier? http://stackoverflow.com/questions/1581718/does-interlocked-compareexchange-use-a-memory-barrier Interlocked.CompareExchange use a memory barrier I'm reading Joe Duffy's post about Volatile.. something about the last code sample in the post while Interlocked.CompareExchange ref m_state 1 0 0 m_state 0 while Interlocked.CompareExchange.. ref m_state 1 0 0 m_state 0 while Interlocked.CompareExchange ref m_state 1 0 0 m_state 0 When the second CMPXCHG operation..
Why use try {} finally {} with an empty try block? http://stackoverflow.com/questions/2186101/why-use-try-finally-with-an-empty-try-block RuntimeHelpers.PrepareConstrainedRegions try finally do if Interlocked.CompareExchange ref m_lock 1 0 0 bLockTaken true try status DeleteTimerNative..
Add delegate to event - thread safety http://stackoverflow.com/questions/3522361/add-delegate-to-event-thread-safety EventHandler Delegate.Combine handler2 value myEvent Interlocked.CompareExchange EventHandler ref this.MyEvent handler3 handler2 while myEvent.. instead of Delegate.Combine . Notice the use of Interlocked.CompareExchange This prevents a race condition between updating the event 䏭..
How do I atomically swap 2 ints in C#? http://stackoverflow.com/questions/3855671/how-do-i-atomically-swap-2-ints-in-c ref m_pair swapped orig 32 uint orig 32 while Interlocked.CompareExchange ref m_pair swapped orig orig It is highly possible I've implemented..
A simple implementation of a Singleton http://stackoverflow.com/questions/5996727/a-simple-implementation-of-a-singleton public static Singleton Instance get if _instance null Interlocked.CompareExchange ref _instance new Singleton null return _instance public void.. for thread safety failed can anyone explain why How come Interlocked.CompareExchange isn't truly atomic public class Program static void Main string.. I am not convinced you can completely trust that. Yes Interlocked.CompareExchanger is atomic but new Singleton is in not going to be atomic in..
http://stackoverflow.com/questions/6581848/memory-barrier-generators remove handlers for events in C# since they use lock or Interlocked.CompareExchange . x86 stores have release fence semantics Microsoft's implemenation..
How to avoid a database race condition when manually incrementing PK of new row http://stackoverflow.com/questions/698366/how-to-avoid-a-database-race-condition-when-manually-incrementing-pk-of-new-row this static counter to good value. I would do it with Interlocked.CompareExchange class Autoincrement static int id 1 public static int NextId.. initialized initialize int lastId select max id from db Interlocked.CompareExchange id 1 lastId get next id atomically return Interlocked.Increment..
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