New Win32 File API Implementation | Handmade Hero Episode Guide

00:00:27Recap

00:01:10Plan for today

00:02:23Asset metadata is already loaded, so LoadBitmap and LoadSound reduce to just fetching the data

00:03:58Getting rid of LoadSound

00:06:22(intermission) Forcing order of reads between checking if an asset is loaded and accessing it

00:07:57(intermission) Implementing CompletePreviousReadsBeforeFutureReads

00:09:55Back to removing LoadSound

00:13:34Copying the contents of assets into the right place in memory

00:14:21General-purpose memory copy function

00:16:21Setting the channel sample pointers

00:17:57Testing the changes. There's some strange clicking bug going on, probably not related to today's changes. We'll do the debugging later

00:19:41Asset background loader with tag matching in 430 lines of code!

00:22:58Avoiding loading the entire asset file into memory

00:23:24Assets need to be rebased and pointed to the appropriate file through a file index

00:25:16Finding a good place in the code for the asset struct

00:27:34Filling in the asset struct

00:33:36The asset struct is just an hha_asset augmented with a file index

00:35:09Don't design architecture up-front

00:36:50Implementing GetFileHandleFor

00:39:08File I/O code is simple. Assuming we don't get it wrong, we'll save time by writing it now and testing it together with the code we just wrote. The alternative would involve writing some extra test code

00:41:36Implementing the platform functions

00:43:23We don't close files, so there's no need for a Win32CloseFile function

00:44:05Win32OpenFile

00:49:13Win32ReadDataFromFile

00:50:21Overlapped I/O

00:53:45Windows can't do reads bigger than 4GB. We don't plan on reading assets of that size, but let's assert against that situation, just in case

00:55:23Win32FileError

00:56:47Ignoring file operations on bad handles

00:58:08Testing today's code

00:59:09Quick step-through

01:00:00We hadn't read the header yet!

01:02:14Visual Studio fails to show size information on symbols outside the current running executable

01:05:00The null asset triggers an assertion. We ignore it for the moment

01:05:46It (mostly) works!

01:06:25Q&A

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01:06:25Q&A

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01:06:25Q&A

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01:07:25bigmonachus What do you use when you need something more dynamic than arenas? Default to VirtualAlloc/malloc? Something completely different?

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01:07:25bigmonachus What do you use when you need something more dynamic than arenas? Default to VirtualAlloc/malloc? Something completely different?

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01:07:25bigmonachus What do you use when you need something more dynamic than arenas? Default to VirtualAlloc/malloc? Something completely different?

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01:09:33insofaras How "handmade" are you going to go on the Linux version?

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01:09:33insofaras How "handmade" are you going to go on the Linux version?

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01:09:33insofaras How "handmade" are you going to go on the Linux version?

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01:10:50quatzequatel Kind of off-topic do you usually have that much luck not getting bugs?

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01:10:50quatzequatel Kind of off-topic do you usually have that much luck not getting bugs?

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01:10:50quatzequatel Kind of off-topic do you usually have that much luck not getting bugs?

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01:13:02plain_flavored Do you usually design an API by just implementing it, or do you try to define the interface first?

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01:13:02plain_flavored Do you usually design an API by just implementing it, or do you try to define the interface first?

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01:13:02plain_flavored Do you usually design an API by just implementing it, or do you try to define the interface first?

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01:15:49kknewkles What is "usage code"? Basically everything down the line that awaits to be fed data?

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01:15:49kknewkles What is "usage code"? Basically everything down the line that awaits to be fed data?

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01:15:49kknewkles What is "usage code"? Basically everything down the line that awaits to be fed data?

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01:27:22general_tach Do you feel that a lot of the common programs today have "bloated" code (much unnecessary code or something along those lines), and/or that coders need to learn to simplify/barebone their code?

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01:27:22general_tach Do you feel that a lot of the common programs today have "bloated" code (much unnecessary code or something along those lines), and/or that coders need to learn to simplify/barebone their code?

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01:27:22general_tach Do you feel that a lot of the common programs today have "bloated" code (much unnecessary code or something along those lines), and/or that coders need to learn to simplify/barebone their code?

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01:27:42gasto5 Doesn't anticipating the usage of the API require decades of work?

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01:27:42gasto5 Doesn't anticipating the usage of the API require decades of work?

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01:27:42gasto5 Doesn't anticipating the usage of the API require decades of work?

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01:33:14kknewkles So basically when you're about to make shoes for a monster, you don't assume how many legs or toes it has, let it stomp around and then use the footprints to make the shoes

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01:33:14kknewkles So basically when you're about to make shoes for a monster, you don't assume how many legs or toes it has, let it stomp around and then use the footprints to make the shoes

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01:33:14kknewkles So basically when you're about to make shoes for a monster, you don't assume how many legs or toes it has, let it stomp around and then use the footprints to make the shoes

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01:33:44jameswidman Suggestion: call this "Snuffy-oriented programming"

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01:33:44jameswidman Suggestion: call this "Snuffy-oriented programming"

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01:33:44jameswidman Suggestion: call this "Snuffy-oriented programming"

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