once_cell

This version has 11 feature flags, 4 of them enabled by default.

default

• std

std

• alloc

alloc

• race

race

This feature flag does not enable additional features.

critical-section

• critical_section
• atomic_polyfill

atomic-polyfill

• critical-section

parking_lot

• parking_lot_core

critical_section

This feature flag does not enable additional features.

unstable

This feature flag does not enable additional features.

atomic_polyfill

This feature flag does not enable additional features.

parking_lot_core

This feature flag does not enable additional features.