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)
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
c# - using interlocked usage - Stack Overflow Interlocked Exchange and Interlocked CompareExchange return the value before modification (they'd be sorta useless if they returned the 'after' value)
Using Interlocked. CompareExchange with a class - Stack Overflow System Threading Interlocked CompareExchange operator provides atomic (thus thread-safe) C# implementation of the Compare-And-Swap operation For example int i = 5; Interlocked CompareExchange(re
How to correctly read an Interlocked. Incremented int field? Suppose I have a non-volatile int field, and a thread which Interlocked Increment s it Can another thread safely read this directly, or does the read also need to be interlocked? I previously thought that I had to use an interlocked read to guarantee that I'm seeing the current value, since, after all, the field isn't volatile I've been using Interlocked CompareExchange(int, 0, 0) to achieve
c# - Interlocked and volatile - Stack Overflow Interlocked operations and volatile are not really supposed to be used at the same time The reason you get a warning is because it (almost?) always indicates you have misunderstood what you are doing Over-simplifying and paraphrasing: volatile indicates that every read operation needs to re-read from memory because there might be other threads updating the variable When applied to a field
C# Interlocked Exchange - Stack Overflow Interlocked should provide overloads for every non-trivial blittable 64-bit (or smaller) value type in the BCL and there's no excuse for anything less Ironically, unlike native C C++ (where compiler-optimization fetish weakens memory access guarantees to the general detriment of lock-free design), the iron-clad memory model in NET actually enables—or even encourages—wider use of lock
Is Interlocked. CompareExchange really faster than a simple lock? The Interlocked class offer atomic operations which means they do not block other code like a lock because they don't really need to When you lock a block of code you want to make sure no 2 threads are in it at the same time, that means that when a thread is inside all other threads wait to get in, which uses resources (cpu time and idle threads)