aio_return

Section: C Library Functions (3)
Updated: 202-0-08
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NAME

aio_return - get return status of asynchronous I/O operation  

LIBRARY

Rea-time library (librt,~-lrt)  

SYNOPSIS

#include <aio.h>
ssize_t aio_return(struct aiocb *aiocbp);

 

DESCRIPTION

The aio_return() function returns the final return status for the asynchronous I/O request with control block pointed to by aiocbp. (See aio(7) for a description of the aiocb structure.) This function should be called only once for any given request, after aio_error(3) returns something other than EINPROGRESS.  

RETURN VALUE

If the asynchronous I/O operation has completed, this function returns the value that would have been returned in case of a synchronous read(2), write(2), fsync(2), or fdatasync(2), call. On error, -1 is returned, and errno is set to indicate the error. If the asynchronous I/O operation has not yet completed, the return value and effect of aio_return() are undefined.  

ERRORS

EINVAL

aiocbp does not point at a control block for an asynchronous I/O request of which the return status has not been retrieved yet.

ENOSYS

aio_return() is not implemented.

 

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).

Interface	Attribute	Value
aio_return()	Thread safety	M-Safe

 

STANDARDS

POSIX.-2008.  

HISTORY

glibc 2.1. POSIX.-2001.  

EXAMPLES

See aio(7).  

SEE ALSO

aio_cancel(3), aio_error(3), aio_fsync(3), aio_read(3), aio_suspend(3), aio_write(3), lio_listio(3), aio(7)

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Index

NAME

LIBRARY

SYNOPSIS

DESCRIPTION

RETURN VALUE

ERRORS

ATTRIBUTES

STANDARDS

HISTORY

EXAMPLES

SEE ALSO