## nng_aio_abort

Abort asynchronous I/O operation.

### Synopsis

```c
#include <nng/nng.h>

void nng_aio_abort(nng_aio *aio, int err);
```

### Description

The `nng_aio_abort()` function aborts an operation previously started with the handle _aio_.
If the operation is aborted, then the callback for the handle will be called, and the function xref:nng_aio_result.adoc[`nng_aio_result`] will return the error _err_.

This function does not wait for the operation to abort, but returns immediately.

If no operation is currently in progress (either because it has already finished, or no operation has been started yet), then this function has no effect.

### See Also

xref:nng_aio_alloc.adoc[nng_aio_alloc],
xref:nng_aio_cancel.adoc[nng_aio_cancel],
xref:nng_aio_result.adoc[nng_aio_result]
