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[native] RustPromiseManager
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Authored by varun on Mar 20 2023, 9:04 PM.
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F3575374: D7113.id24220.diff
Sat, Dec 28, 7:00 PM
F3575340: D7113.id23910.diff
Sat, Dec 28, 6:47 PM
F3575330: D7113.id24095.diff
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F3575327: D7113.id24098.diff
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F3575239: D7113.id24101.diff
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Details

Summary

In this diff, I've created a new singleton called RustPromiseManager. This singleton is responsible for keeping track of unresolved promises that depend on the execution of async Rust code, and for eventually rejecting or resolving the promises.

Test Plan

See the following diff

Diff Detail

Repository
rCOMM Comm
Branch
varun/poc3 (branched from master)
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Event Timeline

varun requested review of this revision.Mar 20 2023, 9:20 PM
jon added inline comments.
native/cpp/CommonCpp/NativeModules/InternalModules/RustPromiseManager.h
3
native/cpp/CommonCpp/NativeModules/InternalModules/RustPromiseManager.h
3

i should actually remove this include altogether

ashoat requested changes to this revision.Mar 21 2023, 7:00 AM

The test plan is D7114, but that diff failed the Android build. Can you fix it up so that the Android build is no longer breaking? I'm also curious how you were able to test the Android build... was it succeeding in your environment despite failing in CI?

native/cpp/CommonCpp/NativeModules/InternalModules/RustPromiseManager.h
3

Yeah it can be removed

19–65

These implementations should be in the .cpp file. I suspect you put them here to reduce the amount of copy-paste, but the real question is why you're doing any copy-paste in the first place

native/ios/Comm/RustPromiseManager.mm
1–27

I don't understand why you implemented two 100%-identical files, one for iOS and one for Android. Can you dedup please? You can use a .cpp filename suffix and store in native/cpp/CommonCpp/NativeModules/InternalModules.

(Separately, this is the kind of thing that you should expect your reviewer to call you out on. If you have a good reason for doing this, it will always shorten review time to annotate that reasoning ahead of time instead of waiting for your reviewer to request changes.)

This revision now requires changes to proceed.Mar 21 2023, 7:00 AM

remove unnecessary include

address last piece of feedback

ashoat requested changes to this revision.Mar 24 2023, 2:04 PM

Collection should be threadsafe

native/cpp/CommonCpp/NativeModules/InternalModules/RustPromiseManager.h
37 ↗(On Diff #24098)

This collection isn't threadsafe, which I thought was the plan. I'm worried about how we're going to call it from CommCoreModule, where we often need to do some work on the database / crypto threads before calling Rust

This revision now requires changes to proceed.Mar 24 2023, 2:04 PM

Talked to @varun offline, plan is to handle thread safety in a later diff

native/cpp/CommonCpp/NativeModules/InternalModules/RustPromiseManager.cpp
24–34 ↗(On Diff #24098)

I think we can make this cleaner by exiting earlier:

auto it = promises.find(id);
if (it == promises.end()) {
  return;
}
39 ↗(On Diff #24098)

Same here

This revision is now accepted and ready to land.Mar 24 2023, 2:50 PM

make promises map thread-safe

sorry addressing feedback now

This revision is now accepted and ready to land.Mar 24 2023, 3:29 PM
varun requested review of this revision.Mar 24 2023, 3:29 PM

sorry, requesting review again because i decided to just add the thread safety changes to this diff....

Looks great, just minor nits! Great work on the synchronization, really for the distraction looking at threadsafe collections

native/cpp/CommonCpp/NativeModules/InternalModules/RustPromiseManager.cpp
3 ↗(On Diff #24101)

Nit: add a newline

native/cpp/CommonCpp/NativeModules/InternalModules/RustPromiseManager.h
12 ↗(On Diff #24101)

Ehh personally I don't love this in a .h file. Don't think it's as bad in a .cpp file, eg. see here. This is a nit though

40 ↗(On Diff #24101)

Nit: add a newline

This revision is now accepted and ready to land.Mar 25 2023, 2:40 AM
varun marked 3 inline comments as done.

address nits

This revision was automatically updated to reflect the committed changes.