package coffee.liz.rookery

/** Wall-clock time in Unix epoch milliseconds. */
expect fun epochMillis(): Long

/** Monotonic milliseconds for measuring durations; never goes backwards. */
expect fun monoMillis(): Long

/** A random identifier, unique enough to name devices and new entities. */
expect fun randomId(): String

/** Today's date here, as yyyy-mm-dd. */
expect fun today(): String

/** Mutual exclusion on [lock] (reentrant). */
expect fun <T> locked(lock: Any, block: () -> T): T