Cargo Features

[dependencies]
sharded_mutex = { version = "1.2.2", default-features = false, features = ["align_none", "align_narrow", "align_cacheline"] }
default = align_narrow

The align_narrow feature is set by default whenever sharded_mutex is added without default-features = false somewhere in the dependency tree.

align_none
align_narrow default
align_wide align_cacheline

ShardedMutex has 4 features without comments.