---
title: dispatch_time_t
framework: dispatch
role: symbol
role_heading: Type Alias
path: dispatch/dispatch_time_t
---

# dispatch_time_t

An abstract representation of time.

## Declaration

```swift
typealias dispatch_time_t = UInt64
```

## Topics

### Well-Defined Times

- [DISPATCH_TIME_NOW](dispatch/dispatch_time_now.md)
- [DISPATCH_TIME_FOREVER](dispatch/dispatch_time_forever.md)

### Time Multiplier Constants

- [USEC_PER_SEC](dispatch/usec_per_sec.md)
- [NSEC_PER_SEC](dispatch/nsec_per_sec.md)
- [NSEC_PER_MSEC](dispatch/nsec_per_msec.md)
- [NSEC_PER_USEC](dispatch/nsec_per_usec.md)

## See Also

### Time Constructs

- [DispatchTime](dispatch/dispatchtime.md)
- [DispatchWallTime](dispatch/dispatchwalltime.md)
- [DispatchTimeInterval](dispatch/dispatchtimeinterval.md)
- [DispatchTimeoutResult](dispatch/dispatchtimeoutresult.md)
- [DISPATCH_WALLTIME_NOW](dispatch/dispatch_walltime_now.md)
- [Wall Time Constants](dispatch/2963138-wall-time-constants.md)