aio_return(2) BSD System Calls Manual aio_return(2)
NAME
aio_return -- retrieve return status of asynchronous I/O operation (REAL-
TIME)
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <aio.h>
ssize_t
aio_return(struct aiocb *aiocbp);
DESCRIPTION
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. How-
ever, 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.
SEE ALSO
aio_cancel(2), aio_error(2), aio_suspend(2), aio_write(2), fsync(2),
read(2), write(2), aio(4), compat(5)
STANDARDS
The aio_return() system call is expected to conform to the IEEE Std
1003.1 (``POSIX.1'') standard.
HISTORY
The aio_return() system call first appeared in FreeBSD 3.0.
AUTHORS
This manual page was written by Wes Peters <wes@softweyr.com>.
BSD September 26, 2008 BSD
Mac OS X 10.9.1 - Generated Sun Jan 5 18:56:00 CST 2014