---
title: MTLSharedEventNotificationBlock
framework: metal
role: symbol
role_heading: Type Alias
path: metal/mtlsharedeventnotificationblock
---

# MTLSharedEventNotificationBlock

A block of code invoked after a shareable event’s signal value equals or exceeds a given value.

## Declaration

```swift
typealias MTLSharedEventNotificationBlock = @Sendable (any MTLSharedEvent, UInt64) -> Void
```

## See Also

### Synchronizing with events

- [Implementing a multistage image filter using heaps and events](metal/implementing-a-multistage-image-filter-using-heaps-and-events.md)
- [About synchronization events](metal/about-synchronization-events.md)
- [Synchronizing events within a single device](metal/synchronizing-events-within-a-single-device.md)
- [Synchronizing events across multiple devices or processes](metal/synchronizing-events-across-multiple-devices-or-processes.md)
- [Synchronizing events between a GPU and the CPU](metal/synchronizing-events-between-a-gpu-and-the-cpu.md)
- [MTLEvent](metal/mtlevent.md)
- [MTLSharedEvent](metal/mtlsharedevent.md)
- [MTLSharedEventHandle](metal/mtlsharedeventhandle.md)
- [MTLSharedEventListener](metal/mtlsharedeventlistener.md)