The Old New Thing

Why won’t C++/WinRT let me co_await a CoreDispatcher or DispatcherQueue?

November 16, 2022 Nov 16, 2022 11/16/22

Raymond Chen

Making sure you meet the usual prerequisites.

C++ constexpr parlor tricks: How can I obtain the length of a string at compile time?

November 14, 2022 Nov 14, 2022 11/14/22

Raymond Chen

The constexpr'ification of strlen.

If I issue multiple overlapped I/O requests against the same region of a file, will they execute in the order I issued them?

November 11, 2022 Nov 11, 2022 11/11/22

Raymond Chen

Overlapped I/O refers to temporal overlap, and that includes completion out of order.

On the dangers of giving a product feature the name “new”

November 10, 2022 Nov 10, 2022 11/10/22

Raymond Chen

It may be new today, but it won't be new tomorrow.

Why don’t Windows functions begin with a pointless MOV EDI,EDI instruction on x86-64?

November 9, 2022 Nov 9, 2022 11/9/22

Raymond Chen

Applying the hot-patch in a different way.

In the debugger, how can I get from a projected type back to the C++/WinRT implementation?

November 7, 2022 Nov 7, 2022 11/7/22

Raymond Chen

Look behind you.

Why am I getting a RPC_E_WRONG_THREAD exception when I’m on the right thread?

November 4, 2022 Nov 4, 2022 11/4/22

Raymond Chen

It's the wrong thread from XAML's point of view.

How does the dialog manager calculate the average width of a character?

November 3, 2022 Nov 3, 2022 11/3/22

Raymond Chen

It's a simple formula, perhaps too simple.

A history of the fd_set, FD_SETSIZE, and how it relates to WinSock

November 2, 2022 Nov 2, 2022 11/2/22

Raymond Chen

The fd_set started out as just a bitmap.

How can I test my geolocation code on a system without a GPS?

October 31, 2022 Oct 31, 2022 10/31/22

Raymond Chen

You can use the Windows Device Portal to create a synthetic GPS.