Author Archives: Ofek Shilon

Reading Specific Monitor Dimensions

Almost 2 years ago I wrote about the proper way of getting the EDID – and in particular the physical monitor size. I did leave a loose end: I actually had to query the dimensions of a specific monitor (specified … Continue reading

Posted in Win32 | 7 Comments

Blogging 101

This is post #101, which makes the previous post #100. When I started all this I didn’t think I’d have 100 things to say.  Glad I was wrong, and hope to still have useful things to say for 100 more … Continue reading

Posted in Musings | Leave a comment

Vector Deleting Destructor and Weak Linkage

Now that the discussions on weak linker symbols and vector deleting destructors are in place, it is time to discuss a fact that might seem esoteric but has far reaching implications. After that, it is time to ask for your … Continue reading

Posted in VC++ | 9 Comments

Executing Code Once Per Thread in an OpenMP Loop

Take this toy loop: Now suppose you want to run some preparation code once per thread – say, SetThreadName, or SetThreadPriority or whatnot.  How would you go about that? If you code it before the loop the code would execute … Continue reading

Posted in C++, VC++ | 5 Comments

On Vector Deleting Destructors and some new/delete internals

A word is due on vector deleting destructors – previously mentioned as the only functions that got weakly bound by the linker. The usual disclaimers apply: everything that follows is my own investigation, in code and online. Nothing here is … Continue reading

Posted in VC++ | 4 Comments

Setting a Watch on Wide Registers in VS

General-purpose registers can be watched from the watch window pretty much as regular variables: (the ‘$’ prefix is optional, but is recommended by MS – probably as means to minimize clashes with code variables.) It is less known that you … Continue reading

Posted in Debugging, VC++ | Leave a comment

x86/x64 Numerical differences – Correction

In a previous post a truncation scheme was suggested, to circumvent x86/x64 differences in math library implementations: Since then, I accumulated some mileage with the scheme and have come to understand that line 8: -is flawed. Since we drop the … Continue reading

Posted in Algorithms, C++, VC++ | Leave a comment

Linker Weak Symbols

C++’s One-Definition-Rule roughly states that In the entire program, an object or non-inline function cannot have more than one definition; if an object or function is used, it must have exactly one definition. Which sounds like a good idea – … Continue reading

Posted in VC++ | 3 Comments

x86/x64 Library Numerical differences

There are many online sets of examples of 64 bit migration pitfalls, but I recently came across two that that appear not to be mentioned elsewhere. First, downright compiler bugs.  We still have those and some raise their head only … Continue reading

Posted in VC++ | 3 Comments

Solving rxinput.dll Crashes

Recently I started getting hit by access violations with weird stacks: It seems an exception is thrown early in the life of some thread, during the initialization routine of rxinput.dll – a dll I never heard of. Naïve googling taught … Continue reading

Posted in DirectX, Win32 | 3 Comments