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locking

LINK : fatal error LNK1104: cannot open file ‘D:\…\MyProj.exe’

40 Had this issue after a reinstall today. Make sure the Application Experience service is started and not set to disabled. If its set to manual, I believe VS will start it.

Categories visual studio Tags executable, locking, visual-studio, visual-studio-2010

Optimistic vs. Pessimistic locking

Optimistic Locking is a strategy where you read a record, take note of a version number (other methods to do this involve dates, timestamps or checksums/hashes) and check that the version hasn’t changed before you write the record back. When you write the record back you filter the update on the version to make sure it’s … Read more

Categories sql server Tags locking, optimistic-locking, pessimistic-locking, sql-server

What does a lock statement do under the hood?

The lock statement is translated by C# 3.0 to the following: In C# 4.0 this has changed and it is now generated as follows: You can find more info about what Monitor.Enter does here. To quote MSDN: Use Enter to acquire the Monitor on the object passed as the parameter. If another thread has executed … Read more

Categories c# Tags .net, c#, locking, synchronization, thread-safety

What is the difference between lock, mutex and semaphore?

A lock allows only one thread to enter the part that’s locked and the lock is not shared with any other processes. A mutex is the same as a lock but it can be system wide (shared by multiple processes). A semaphore does the same as a mutex but allows x number of threads to enter, this … Read more

Categories concurrency Tags concurrency, locking, mutex, semaphore

What is the difference between lock, mutex and semaphore?

A lock allows only one thread to enter the part that’s locked and the lock is not shared with any other processes. A mutex is the same as a lock but it can be system wide (shared by multiple processes). A semaphore does the same as a mutex but allows x number of threads to enter, this … Read more

Categories concurrency Tags concurrency, locking, mutex, semaphore

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