DispatchSemaphore

import Dispatch

class DispatchObject

protocol Sendable

A thread-safe type whose values can be shared across arbitrary concurrent contexts without introducing a risk of data races. Values of the type may have no shared mutable state, or they may protect that state with a lock or by forcing it to only be accessed from a specific actor.

init(value: Int)

@discardableResult func signal() -> Int

func wait()

func wait(timeout: DispatchTime) -> DispatchTimeoutResult

func wait(wallTimeout: DispatchWallTime) -> DispatchTimeoutResult