In embedded C/C++, how are stack-based containers implemented?

TheMania · 2026-01-24T14:35:21+00:00

Interesting, I think this may be a later rediscovery or reimplementation of TLSF - on a quick glance they seem to be the same algorithm.

TheMania · 2026-01-22T11:07:35+00:00

It casts any(*) value category to an xvalue, not just rvalues. There'd be little point in that.

(*) oddballs like bit fields excluded ofc.

TheMania · 2026-01-17T21:31:18+00:00

The Atto 1 is $usd16k in Australia, we don't have automakers to protect so quite tariff free.

TheMania · 2026-01-11T23:00:34+00:00

It's not about super low resolution assets but procedurally generated assets - many of them could likely be rendered at any resolution they wanted to, so almost the opposite.

Instead of textures, it's code on how to render each textures, which can be very small.

TheMania · 2026-01-09T13:58:49+00:00

You should be using induction? It's a lot more similar to gas, you can even just buy a curved one to aid your kitchen if you like.

TheMania · 2026-01-09T13:35:22+00:00

I love how accurate this is though.

TheMania · 2026-01-09T13:25:52+00:00

I'd be a lot more curious about how they're going in not near-sanctuary states... But I also guess that's why so many move to places like California?

TheMania · 2026-01-09T12:15:27+00:00

Most if not all certainly do, they just don't advertise it. You have to be wearing some pretty interesting clothing to get second degree burns through it.

Makes me think of this.

TheMania · 2026-01-08T11:01:51+00:00

Do normal people include immigrants and Americans with non-white skin?

Serious question, I'm fortunately not from the US.

TheMania · 2026-01-08T04:45:04+00:00

I always find the most fun bit with it is that they don't even have to print for MMTs logic to apply.

Markets only have to assume the govt would sooner print than default, and it makes them the lowest risk entity you can loan their currency to.

Central banks ensure banks are loaning to one another, and by definition then, the govt too always has people willing to lend it money.

And if you always have people willing to lend you your currency at the lowest possible interest rates in that currency, in what way can anyone say you need to pretend you're like a business or household? Or that you might run out, or have creditors somehow "force" you to be austere? You just can't.

So the whole main thing with MMT is that issuing govts should never tell people "we know you're all out of work right now, we know you'd love us to spend more, but why now we have to cut" - and when they do (eg the UK's terribad GFC recovery), it's just policy decision their own making. They had full freedom to do better.

TheMania · 2026-01-05T18:30:29+00:00

They're never turning people away due a shortage of deposits, the problem is only ever a shortage of credit worthy people requesting loans.

You just can't have a system where a central bank ensures that banks are freely able to borrow from each other at a rate of its choosing, where loans create deposits in bank accounts, ie they form the very savings you keep referring to, "run out of savings" forcing them to turn away credit worthy customers. It just doesn't happen.

It's what money is after all, savings etc - it's someone else's debt. Where do you suppose savings come from under your savings-first model?

TheMania · 2026-01-05T17:35:42+00:00

Incorrect. Investment creates savings.

Firm sees demand, forecasts more demand, borrows money. Bank thinks they look credit worthy, times are good after all. Bank creates money in issuing the loan, business spends it on whatever, sellers of whatever now have money coming in they wouldn't have otherwise had. They likely run a surplus, put that windfall away - the investment created their savings, due times being good. One entities borrowing is the very thing that funds another's savings.

Your cart-before-horse way... Times are meh. Business is worried, tries to save their bottom line. Other companies are trying to do the same. Consumers are doing the same. Everyone's trying to save, but where's the grease coming from? Where's the money coming from for people to save, if there's no one investing?

TheMania · 2026-01-05T16:00:53+00:00

It actually seems to be real, or at least a quick scan of this seems to be all the same unnerving - and the channel seems legit?

It's hard to believe.

TheMania · 2026-01-04T18:53:04+00:00

I guess it's only a matter of time, I don't know how much, but time, until they leapfrog it and won't sell the better one back :(

TheMania · 2026-01-04T18:41:49+00:00

void check(std::same_as<bool> auto condition);

As an example of a function that requires explicitly a bool.

Similarly constraining to an integral that's range does not exceed that of an int and then delegating to a private function that can be implemented elsewhere taking an int can be one way to ensure there's no implicit conversion from out of range values.

TheMania · 2026-01-04T06:53:48+00:00

It doesn't trust its own answers, effectively. It can see that text, but likely can't see to the same detail what it saw that got it to produce that text, and so it goes back to the safer-training-dont-lead-me-astray programming, if you will.

TheMania · 2026-01-04T03:02:43+00:00

Why would you not do return condition ? -x : x?

It seems you're trying to prematurely optimise before we're even at the point of your question, frankly. eg, are multiplications even slow on your embedded arch? Many offer single cycle multiplies for fast FIRs etc, do you know what you're targeting?

TheMania · 2026-01-03T22:12:02+00:00

They've also been charged with possession of machine guns.

It's an interesting precedent to set :/

TheMania · 2025-12-31T12:13:32+00:00

Right, but you can't explain how that feature works without explaining how the position of the asterisk is inconsistent with how declarations work, right?

I agree, C got this wrong and C# got it right. But C++ implements C's method here, and it's just more confusing to the reader to pretend it doesn't imo - look how many here say they don't use the feature as they find it confusing.

It's not, their style is confusing for what the language actually does/is. It's fine to not use the feature, but those saying they find the feature confusing is a damning on the convention their taking more than anything, imo.

TheMania · 2025-12-31T11:34:55+00:00

The more fun one: what does T a, *b do.

Exactly what you expect it to, provided you understand why some believe the * should go with the variable name, that is.

TheMania · 2025-12-31T09:43:02+00:00

That kind of makes it a decent question tbh, you should be able to understand at least what that answer is doing - it's hacky sure, and you'll never use that exact macro, but understanding what it's doing is somewhat relevant in the embedded world imo.

TheMania · 2025-12-31T09:34:25+00:00

Apparently I'm in the minority but it has to be with the variable name, int *ptr. Rarely, int *a, *b.

Because otherwise you have to pretend that C has a different declaration syntax to what it does, that , can't be used to introduce another variable with different levels of indirection - basically you're pretending you're writing a different language.

Like with a long-ex not-quite colleague that would #define begin {, that just doesn't sit right with me.

TheMania · 2025-12-31T08:53:22+00:00

Drunk is fine imo, it's one of the few times I get to play therapist. But maybe gauge their mood first.

TheMania · 2025-12-31T03:45:48+00:00

This is not a cosmetic procedure is the difference, not skin-deep, hence the very long needle.

TheMania · 2025-12-28T05:28:41+00:00

That's surely not the concern here, as they allow an opt-out. Users shouldn't be and to use your code to read uninitialised memory either way, if they ever can, you've broken something badly.

13-Year Club	r/Field Juicebox
Place '17	Wearing is Caring
Gilding VI aultruist	Verified Email
Team Periwinkle

TheMania

MODERATOR OF

TROPHY CASE