| --- Log opened Tue Feb 04 00:00:48 2020 |
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| 01:49 | | * McMartin grumbles at this code, decides once again that all abstraction layers have been cut at the wrong points |
| 01:50 | <@Reiv> | oh dear |
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| 02:11 | <&McMartin> | Eh |
| 02:11 | <&McMartin> | The jump from "be one thing" to "swap as needed between two things" is always rough |
| 02:11 | <&McMartin> | And it turns out the two things may be so distinct that it doesn't make sense for them to share any code. |
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| 08:59 | <&jeroud> | I try to avoid drawing abstraction boundaries until I have more than one thing to put behind one side. |
| 08:59 | <&jeroud> | For that sort of boundary, at least. |
| 09:00 | <&jeroud> | There are plenty of abstraction boundaries where I only ever expect one thing on each side. |
| 09:02 | <&jeroud> | I have spent many long weeks ripping out abstractions that were put around things that we expected to have multiple implementations of only to discover that the second implementation had a different enough interface that the abstraction didn't actually fit. |
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| 10:06 | <&McMartin> | Yep, that is what is happening here |
| 10:06 | <&McMartin> | Though I am feeling DEEPLY VEXED because one of those layers has no right to be nonuniversal |
| 10:11 | <&jeroud> | Welcome to the tech industry. |
| 10:13 | <&jeroud> | What's the recalcitrantly nonnonuniversal layer? |
| 10:16 | <&McMartin> | readIntoBuffer:(void *) length:(size_t) |
| 10:16 | <&McMartin> | It turns out the second thing we added isn't enough like a stream unless I bend over backwards in ways that make it less efficient |
| 10:17 | <&McMartin> | The tippy top abstraction layer, which I want to keep, is basically structuredDataReadyCallback(struct) |
| 10:17 | <&McMartin> | which produces a stream of parsed and packaged structures. |
| 10:18 | <&jeroud> | I am deeply suspicious of anything with void* in it. |
| 10:18 | <&McMartin> | it's really uint8_t * but it's been tradition since fread. |
| 10:18 | <&jeroud> | But I'm a bit of a type system snob. |
| 10:20 | <&McMartin> | Breaking that attitude with files is UNIX's primary feature. |
| 10:20 | <&McMartin> | Any program can open any file, all files are just a sequence of bits with no structure. |
| 10:20 | <&McMartin> | And in the case of the media bitstreams we're dealing with |
| 10:20 | <&McMartin> | BOY HOWDY are they a sequence of bits with no structure |
| 10:20 | <&McMartin> | My favorite aspect is the 33-bit integers it regularly relies on |
| 10:22 | <&McMartin> | And yeah, my primary job here is to Do The C Work that lets the rest of the system get a nice packaged properly-typed set of objects to work with. |
| 10:23 | <&McMartin> | And the other side is a raw network stream, which one would *like to think* would be enough like a file that you could have an fread-like abstraction layer |
| 10:23 | <&McMartin> | This is... not working out. |
| 10:23 | <&McMartin> | So it'll just be two parallel implementations and I'll see what parts can be shared later. |
| 10:28 | <&McMartin> | The main not-working-out is that we're relying on third party code for a lot of this and one of the libraries is Very Synchronous and the other is Very Asynchronous |
| 10:28 | <&McMartin> | So I can synchronize the async one, or actually implement it sensibly since the top-level abstraction is Hella Async |
| 10:29 | <&McMartin> | (The synchronous one gets a worker thread and hurls results into the callbacks as it generates them.) |
| 10:29 | <&McMartin> | (But the original idea was that worker-thread wrangling could go in the shared code and I'm feeling like that's a bad idea.) |
| 10:35 | <&jeroud> | Sounds like you need to read files into a localhost socket.~ |
| 10:35 | <&jeroud> | (Or a unix socket, if applicable.) |
| 10:35 | <&jeroud> | (But that's a terrible idea don't do it.) |
| 10:36 | <&jeroud> | (The whole thing, I mean, not just the unix socket.) |
| 10:37 | <&McMartin> | Yeah if we ever have to deal with content push we'll need something like that and the top-level abstraction can *still hide that* |
| 11:02 | <&jeroud> | Most of the the systems I've used that support some kind of async have a threadpool mechanism you can hook into. |
| 11:03 | <&jeroud> | But none of those have been C. |
| 11:03 | <&jeroud> | And most of them have been... awkward. |
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| 14:03 | <@sshine> | code of the day: my $superjobcategory = JIX::Page->niche_site; |
| 14:04 | <@sshine> | so a $superjobcategory is, in this codebase, expected to be an instance of a particular class called JIX::Superjobcategory. and JIX::Page->niche_site is a function that always returns a string containing a 'slug' of some kind. but for the past many years, JIX::Page->niche_site has returned undef. so this line (and the 20-30 lines that come after it) somehow assume something that's never been true and have |
| 14:05 | <@sshine> | done so for ~5 years. |
| 14:05 | <@sshine> | I love deleting code. |
| 14:05 | <@sshine> | s/(?<=have done so for ~5 years)/ when it could have been deleted/ |
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| --- Log closed Wed Feb 05 00:00:50 2020 |