---
title: wouldBlock
framework: system
role: symbol
role_heading: Type Property
path: system/errno/wouldblock
---

# wouldBlock

Operation would block.

## Declaration

```swift
static var wouldBlock: Errno { get }
```

## Mentioned in

Adopting Swift Error Constants

## Discussion

Discussion The corresponding C error is EWOULDBLOCK.

## See Also

### Runtime Errors

- [deadlock](system/errno/deadlock.md)
- [noMemory](system/errno/nomemory.md)