Calling functions within transaction

[Karthik Velayutham]

Hi,

I was wondering how PMDK transactions work with functions being called within a closure? Does the entirety of the function rollback as well during a crash, including persistent memory changes that are made in the method?

Thanks!

[Piotr Balcer]

As long as the closure is executed in the same thread as the transaction, yes.

We have examples here: https://pmem.io/2016/05/25/cpp-07.html

[Karthik Velayutham]

Thanks for getting back to me Piotr. My code currently uses the C macro instead of the C++ bindings, so I'm unsure if that makes a difference. I'm talking about something like this: 

TX_BEGIN(pop) {

      do_some_function(arg);

} TX_END

Does the work in do_some_function() rollback as well during a failed transaction? Does your answer apply here too?

[Piotr Balcer]

I misunderstood what you meant by closure. Yes, what you are asking about is true. The transaction's state is thread local.