doAtomic returns old value

[DavidDureau]

In some algorithms, we need to get atomically the previous value ("old" value) just before the atomic operation.

Now, doAtomic doesn't return any value.

Could doAtomic return the "old" value like CUDA atomicAdd (or Min, ...)?

In addition, I need to perform an atomic ++ on an integer.
Is it possible to have an eAtomicOperation::Inc like CUDA?
I guess it would be more efficient.

[grospelliergilles]

Good idea.
I will do it on Monday.