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by glacia01
1030 days ago
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>I know berating C is trendy, but it feels a bit gratuitous and uncalled for in your comment... Sorry about that, English is not my first language so i might sound rude sometimes. I actually dont hate C, but if you used it you know its flaws. I think stuff i mentioned about C is objectively bad, hence why i called them dumb stuff. >Not sure I would like fat pointers, exceptions and threads in my embedded code though Fat pointers are just pointer + size of an object. You have to pass array size anyway, so its just convenient. Obviously, if you need to just pass a pointer there are ways to do that. As for exceptions and threads: As i said, you can disable or modify them just by using Restrictions pragma. Its a language defined thing. For example, Ada 2022 defines two profiles for safety-critical hard real-time computing: https://en.wikipedia.org/wiki/Ravenscar_profile
http://www.ada-auth.org/standards/22rm/html/rm-d-13.html |
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No offense taken, not a native here either ;-)
> if you used it you know its flaws
Indeed, I've been using C for almost 20 years now. I won't say it's without flaw for sure, it has its quirks, but overall I do think it's quite okay for the job.
> Fat pointers are just pointer + size of an object
Yeah I know what fat pointers are, I even resort to handcraft some form in C for some neat performance hackery on x64.
But the thing is, we're talking embedded here. Most ucontrollers I use have 8b address space, no MMU or any form of virtual memory, separated instruction/data bus (MVHA). That kind of thing don't play well with funky fat pointers.
Sure if your definition of embedded is "64b ARM" all is good, but I guess we're on a spectrum.
Exceptions are pretty much non existing as well, since that would require some form of runtime, which you often just cannot afford on a small chip (if not just form the sheer size of it).
Threading is a no go as well. To get threads, or any form of multitasking really, you have to rely on an operating system, which by definition is a bit weird to have on an embedded IC.