c# - Volatile vs. Interlocked vs. lock - Stack Overflow Interlocked methods do not need or even do not support access to a volatile field, as volatile is placed a half fence around operations on given field and interlocked is using the full fence Footnote: What volatile is actually good for As volatile doesn't prevent these kinds of multithreading issues, what's it for?
C# Interlocked functions as a lock mechanism? - Stack Overflow Interlocked can, however, help developers implement locking mechanism, though you might as well use the built-in ones Most locks require kernel support to interrupt the blocked thread until the lock becomes available
How does Interlocked work and why is it faster than lock? Interlocked has support at the CPU level, which can do the atomic operation directly For example, Interlocked Increment is effectively an XADD, and compare and swap (ie: Interlocked CompareExchange) is supported via the CMPXCHG instructions (both with a LOCK prefix)
Correct way to use the Interlocked class for multithreading in . NET Interlocked in this case will only ensure that processedLargeReports will always get to 0 after all threads finished processing all tasks, but that is all If you need to limit concurrent access to some resourse - just use appropriate tool for this: Semaphore or SemaphoreSlim classes Create semaphore which allows LargeReportLimit threads in
c# - Interlocked - when do I use it? - Stack Overflow You do not need to use Interlocked Interlocked is for advanced users I suggest you use the lock C# statement and only use Interlocked for easy cases (increment a shared counter) or performance critical cases Interlocked can only be used to access a single variable at a time and only quite primitive operations are supported
Reading an int thats updated by Interlocked on other threads The Interlocked methods impose full fences, while the Volatile methods impose half fences¹ So using the static methods of the Volatile class is a potentially more economic way of reading atomically the latest value of an int variable or field
multithreading - Where is InterlockedRead? - Stack Overflow Interestingly, NET's Interlocked class didn't gain a Read method until NET 2 0 I believe that Interlocked Read is implemented using Interlocked CompareExchange (Note that the documentation for Interlocked Read strikes me as somewhat misleading - it talks about atomicity, but not volatility, which means something very specific on NET