aio_return(3) Linux Man Page

Name

aio_return - get return status of asynchronous I/O operation

Library

Real-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). allbox; lbx lb lb T{ aio_return()

Interface	Attribute	Value
T}	Thread safety	MT-Safe

Standards

POSIX.1-2008.

History

glibc 2.1. POSIX.1-2001.

Examples

See aio(7).

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