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# dispatch_source_timer_flags_t

Flags to use when configuring a timer dispatch source.

```
typedef unsigned long dispatch_source_timer_flags_t;
```

## Topics

### Timer Flags

[`DISPATCH_TIMER_STRICT`](/documentation/Dispatch/DISPATCH_TIMER_STRICT)

The system makes its best effort to observe the timer’s specified leeway value, even if the value is smaller than the default leeway.


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