The Old New Thing

What can go wrong if you release an SRWLock from a thread different from the one that acquired it?

June 23, 2023 Jun 23, 2023 06/23/23

Raymond Chen

It's not a supported scenario, so anything can happen.

How can I find out the last time a user logged on from C++?

June 22, 2023 Jun 22, 2023 06/22/23

Raymond Chen

The information is in the historically-named LANMAN APIs.

The case of the make_shared on a C++/WinRT type

June 21, 2023 Jun 21, 2023 06/21/23

Raymond Chen

Now you can't tell who's in charge.

Why is Windows using only even-numbered processors?

June 20, 2023 Jun 20, 2023 06/20/23

Raymond Chen

Spreading out the load over cores.

Why am I being told about a signed/unsigned comparison, and why only sometimes, and how can I fix it?

June 19, 2023 Jun 19, 2023 06/19/23

Raymond Chen

How the compiler back-end can influence warnings.

The case of the invalid handle despite being managed by an RAII type, part 2

June 16, 2023 Jun 16, 2023 06/16/23

Raymond Chen

Avoiding using an object after is has destructed, and maybe using a less-well-known corner of the C++ language.

The case of the invalid handle despite being managed by an RAII type

June 15, 2023 Jun 15, 2023 06/15/23

Raymond Chen

The handle remains valid for the object's lifetime, but what is the object's lifetime?

How expensive is it to create a Windows performance counter?

June 14, 2023 Jun 14, 2023 06/14/23

Raymond Chen

The cost depends on the performance counter.

SIDs are really just another a fancy way of creating unique IDs in a decentralized way

June 13, 2023 Jun 13, 2023 06/13/23

Raymond Chen

Keeping them from colliding with each other.

The move constructor that you have to declare, even though you don’t want anyone to actually call it

June 12, 2023 Jun 12, 2023 06/12/23

Raymond Chen

Forcing named return value optimization.