aio_return2

Usage

Library

Standard C Library (libc, -lc)

Overview

The aio_return() system call returns the final status of the asynchronous I/O request associated with the structure pointed to by aiocbp.

The aio_return() system call should only be called once, to obtain the final status of an asynchronous I/O operation (once aio_error(2) returns something other than EINPROGRESS) and to clean up system resources. However, if aio_return() is not called at all, aio(4) will leak resources.

Return values

If the asynchronous I/O request has completed, the status is returned as described in read(2), write(2), or fsync(2). On failure, aio_return() returns -1 and sets errno to indicate the error condition.

Errors

The aio_return() system call will fail if:

[EINVAL]

The aiocbp argument does not reference an outstanding asynchronous I/O request.

[EINPROGRESS]

The asynchronous I/O request is still in progress.

Legacy synopsis

#include <aio.h>

int
aio_return(struct aiocb *aiocbp);

The type of the return value has changed.