aio_return (3)
Leading comments
Copyright (c) 2003 Andries Brouwer (aeb@cwi.nl) %%%LICENSE_START(GPLv2+_DOC_FULL) This is free documentation; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. The GNU General Public License's references to "object code" and "executables" are to be interpreted as the output of any document formatting or typesetting system, including i...
NAME
aio_return - get return status of asynchronous I/O operationSYNOPSIS
#include <aio.h>ssize_t aio_return(struct aiocb *aiocbp);
Link with -lrt.
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 appropriately.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 attributes(7).| Interface | Attribute | Value |
| aio_return() | Thread safety | MT-Safe |