Comments by Bruno van Dooren

Bruno van Dooren 3-Jan-24 8:38am View

Ok, but the pragma directives you mentioned only change where exactly in the binary pe image, certain pieces of compiled code are stored. What I do not yet understand is how the exact layout of the compiled code in the executable changes the coding job.

Bruno van Dooren 19-Dec-23 4:38am View

I got downvoted for saying this :)

Bruno van Dooren 18-Dec-23 12:15pm View

YOU say: if it's x = (char*) y it will still shift by 4 bytes when x + 1, etc

x is a char*.
If you declare x as int* you are ignoring compiler warnings.

Bruno van Dooren 18-Dec-23 10:55am View

>> if I write *((char*)ptr + 2) then the arithmetics changes and instead of 2*sizeof(int) changes into 2*sizeof(char) ??

that is correct.

>> if it's x = (char*) y it will still shift by 4 bytes when x + 1, etc

No, it won't. if X is of type char* and you do +1 it will shift by 1 byte.

Bruno van Dooren 25-Jun-23 7:07am View

I agree with most of your comments, except the one about memory.
This is an assignment for a HFT firm. Algorithm speed is everything to those people. Anything else is a secondary concern if at all. Int64 is the native integer length and can be done in a single instruction. It could be that Int32 is equally fast but I would benchmark them both and go with the fastest one because that's what they are after.

Bruno van Dooren 22-Jun-23 1:48am View

Fair point. Gather what info you can, log some state and then continue the crash.

Bruno van Dooren 21-Jun-23 17:13pm View

using try ... catch across dll boundaries is a bad idea though. There are no guarantees that this will work properly unless everything is built against the same runtime version with compatible compiler and linker settings.
Either the DLL should catch everything before the exception leaves the dll, and properly terminate, or the app should be allowed to crash. Undefined behavior is often worse than a crash.

Bruno van Dooren 3-Feb-23 12:11pm View

On Windows, Named Pipes can be used for communications between systems and it's a much better alternative than direct TCP / UDP because they are tied in with Windows security so not only can the server restrict access, but the server can -depending on system config, security settings and client's approval- impersonate the client for passing client-server calls, or checking group membership of the calling token.

Bruno van Dooren 18-Jan-23 9:57am View

It is very similar. It's a different way of approaching the same solution, with an explanation of why your original approach doesn't work

Comments by Bruno van Dooren (Top 9 by date)