Cargo Features

[dependencies]
async-lock = { version = "3.4.0", default-features = false, features = ["std", "loom"] }
default = std

The std feature is set by default whenever async-lock is added without default-features = false somewhere in the dependency tree.

std default

Enables std of event-listener and event-listener-strategy

loom

Enables loom, loom of event-listener

async-lock has 3 features without comments.