arpad-m 5705413d90 Use OnceLock instead of manually implementing it (#4805) ...

## Problem

In https://github.com/neondatabase/neon/issues/4743 , I'm trying to make
more of the pageserver async, but in order for that to happen, I need to
be able to persist the result of `ImageLayer::load` across await points.
For that to happen, the return value needs to be `Send`.

## Summary of changes

Use `OnceLock` in the image layer instead of manually implementing it
with booleans, locks and `Option`.

Part of #4743

2023-07-26 17:20:09 +02:00

..

benches

remove LayerDescriptor and use LayerObject for tests (#4637)

2023-07-10 19:40:37 +03:00

ctl

Preparatory pageserver async conversions (#4773)

2023-07-24 14:01:54 +02:00

fixtures

walredo: simple tests and bench updates (#3045)

2023-01-16 18:24:45 +02:00

src

Use OnceLock instead of manually implementing it (#4805)

2023-07-26 17:20:09 +02:00

Cargo.toml

Limit concurrent compactions (#4777)

2023-07-25 10:19:04 +03:00