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Re: There are going to be a lot of hangovers tomorrow!

5-Jul-20 3:24

Slacker007 wrote:
I never saw anything actually get blown up on 4th of July.

*grabs 3 boxes of sparklers and some duct tape*

hold my beer Smile | :)

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Slacker0075-Jul-20 9:11

Slacker007

5-Jul-20 9:11

that won't blow up, even if you grab 300 boxes. won't blow up. no explosion. just a big fire.

here's your beer back. Laugh | :laugh:

Re: There are going to be a lot of hangovers tomorrow!

honey the codewitch5-Jul-20 9:21

Re: There are going to be a lot of hangovers tomorrow!

5-Jul-20 9:21

Any high accelerant will explode if encased tightly enough. Considering I used to build sparkler bombs I can tell you you're wrong here. Sorry.

Sparkler bomb exploding - youtube[^]

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obermd6-Jul-20 3:19

obermd

6-Jul-20 3:19

He who has a fifth on the fourth won't venture forth on the fifth.

Commit strip OTD: Talk to me!

OriginalGriff3-Jul-20 22:03

OriginalGriff

3-Jul-20 22:03

Talk to me | CommitStrip[^]

I hate it when that happens! Laugh | :laugh:

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Rage3-Jul-20 22:42

Rage

3-Jul-20 22:42

That's the Schroedinger error.

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Greg Utas4-Jul-20 0:13

Greg Utas

4-Jul-20 0:13

Or a log flood that consumes all available resources. Big Grin | :-D

Daniel Pfeffer4-Jul-20 8:04

Daniel Pfeffer

4-Jul-20 8:04

The dread heisenbug strikes again!

Freedom is the freedom to say that two plus two make four. If that is granted, all else follows.
-- 6079 Smith W.

jsc424-Jul-20 10:32

jsc42

4-Jul-20 10:32

Daniel Pfeffer wrote:
The dread heisenbug strikes again!

are you sure? I have some uncertainty (in principle)

dandy725-Jul-20 3:25

dandy72

5-Jul-20 3:25

This is like problems that only happens in release mode - but work perfectly fine in debug mode.

But then, there's entire articles dedicated to this topic...

honey the codewitch5-Jul-20 3:29

5-Jul-20 3:29

dandy72 wrote:
But then, there's entire articles dedicated to this topic...

Which can be boiled down to "your 'uninitialized' variables are getting initialized to different values in debug than release"

Laugh | :laugh:

Real programmers use butterflies

Any interest in something like the following?

dandy726-Jul-20 2:31

dandy72

6-Jul-20 2:31

Nowadays, sure.

I wasn't clear with my intent, but I meant there's numerous articles discussing how to debug release-mode apps, not why apps might behave differently.

honey the codewitch3-Jul-20 17:31

3-Jul-20 17:31

I have the basis for what might be an interesting article in and of itself within my MIDI library.

There's a very tricky call i have to make that relies on passing essentially variable length structs, and consequently, the .NET marshaller cannot handle it out of the box. Instead of using StructLayoutAttribute and MarshalAsAttribute to mark up your structure and p/invoke function calls, you basically need to use StructLayoutAttribute and then use the Marshal class methods to copy the variable length portion in manually.

I don't know how many people have run into P/Invoking into C style libraries that take variable length structs, so is anyone interested in this?

I'd rather put this out there up front before I spend time and effort on an article that nobody cares about, and this is kind of arcana.

Edit: Big thanks folks. Your responses let me know there was some interest and I'm in the process of writing it.

Real programmers use butterflies

modified 4-Jul-20 7:37am.

Garth J Lancaster3-Jul-20 19:28

Garth J Lancaster

3-Jul-20 19:28

As you and I have discussed, I think it would be worthwhile .. sure, I can pull apart your code and but that won't necessarily make it obvious

This will become another resource, along with Luc Pattyn's Article: P/Invoke, part 1 and to a much lesser extent pinvoke.net: the interop wiki!

My biggest achievement along the same lines I can't show in code, a) because it was commercial - wrapping a c++ PGP library and creating a C# layer for it, b) iirc it was relatively 'simple' structs etc

honey the codewitch4-Jul-20 6:40

4-Jul-20 6:40

Here you go: P/Invoke Jujitsu: Passing Variable Length Structs[^]

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Luc Pattyn5-Jul-20 12:47

Luc Pattyn

5-Jul-20 12:47

Luc Pattyn [My Articles] Nil Volentibus Arduum

Jon McKee3-Jul-20 20:52

Jon McKee

3-Jul-20 20:52

I'd read it Thumbs Up | :thumbsup:

honey the codewitch4-Jul-20 10:37

4-Jul-20 10:37

I posted it here: P/Invoke Jujitsu: Passing Variable Length Structs[^]

I hope you enjoy it.

I've been doing p/invoke so long and C coding before that that I kind of forget what people don't know when it comes to it. I didn't want to recover beginner P/Invoke stuff but let me know if I didn't explain something very well, when you get a chance to look at it.

Real programmers use butterflies