aio_return(3) Library Functions Manual aio_return(3)
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 asyn-
chronous 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.
VERSIONS
The aio_return() function is available since glibc 2.1.
ATTRIBUTES
For an explanation of the terms used in this section, see at-
tributes(7).
┌────────────────────────────────────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├────────────────────────────────────────────┼───────────────┼─────────┤
│aio_return() │ Thread safety │ MT-Safe │
└────────────────────────────────────────────┴───────────────┴─────────┘
STANDARDS
POSIX.1-2001, POSIX.1-2008.
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)
Linux man-pages 6.03 2022-12-15 aio_return(3)
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