aio_return - get return status of asynchronous I/O operation

NAME  LIBRARY  SYNOPSIS  DESCRIPTION  RETURN VALUE  ERRORS  ATTRIBUTES  STANDARDS  HISTORY  EXAMPLES  SEE ALSO 

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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).

STANDARDS

POSIX.1-2008.

HISTORY

glibc 2.1. POSIX.1-2001.

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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