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# QCPlugInExecutionMode

Execution modes for custom patches.

```
struct QCPlugInExecutionMode
```

## Topics

### Constants

[`kQCPlugInExecutionModeProvider`](/documentation/Quartz/kQCPlugInExecutionModeProvider)

A provider execution mode. The custom patch executes on demand—that is, whenever data is requested of it, but at most once per frame.

[`kQCPlugInExecutionModeProcessor`](/documentation/Quartz/kQCPlugInExecutionModeProcessor)

A processor execution mode. The custom patch executes whenever its inputs change or if the time change (assuming it’s time-dependent).

[`kQCPlugInExecutionModeConsumer`](/documentation/Quartz/kQCPlugInExecutionModeConsumer)

A consumer execution mode. The custom patch always executes assuming the value of its Enable input port is `true`. (The Enable port is automatically added by the system.)


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