---
title: handleSwapCleanup
framework: driverkit
role: symbol
role_heading: Instance Method
path: driverkit/ioreporter_ivars/handleswapcleanup
---

# handleSwapCleanup

## Declaration

```occ
virtual void handleSwapCleanup(int swapNChannels);
```

## Parameters

- `swapNChannels`: Channel-Relative size of the _swap buffers

## Discussion

Discussion Release and forget unused buffers ::handleSwapCleanup() is responsible for deallocating the buffers no longer used after a swap.  It must always be called if SwapPrepare() completes successfully.  Because bufers may be swapped in and out of existance, the _swap* variables may be NULL and should be set to NULL when complete. Locking: The caller must ensure that the config lock is HELD but that the reporter (data) lock is NOT HELD.