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aio_return(3c) [opensolaris man page]

aio_return(3C)						   Standard C Library Functions 					    aio_return(3C)

NAME
aio_return - retrieve return status of an asynchronous I/O operation SYNOPSIS
#include <aio.h> ssize_t aio_return(struct aiocb *aiocbp); DESCRIPTION
The aio_return() function returns the return status associated with the aiocb structure referenced by the aiocbp argument. The return sta- tus for an asynchronous I/O operation is the value that would be returned by the corresponding read(2), write(2), or fsync(3C) function call. If the error status for the operation is equal to EINPROGRESS, then the return status for the operation is undefined. The aio_return() function may be called exactly once to retrieve the return status of a given asynchronous operation; thereafter, if the same aiocb structure is used in a call to aio_return() or aio_error(3C), an error may be returned. When the aiocb structure referred to by aiocbp is used to submit another asynchronous operation, then aio_return() may be successfully used to retrieve the return status of that operation. RETURN VALUES
If the asynchronous I/O operation has completed, then the return status, as described for read(2), write(2), and fsync(3C), is returned. If the asynchronous I/O operation has not yet completed, the results of aio_return() are undefined. ERRORS
The aio_return() function will fail if: EINVAL The aiocbp argument does not refer to an asynchronous operation whose return status has not yet been retrieved. ENOSYS The aio_return() function is not supported by the system. USAGE
The aio_return() function has a transitional interface for 64-bit file offsets. See lf64(5). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ |ATTRIBUTE TYPE |ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Committed | +-----------------------------+-----------------------------+ |MT-Level |Async-Signal-Safe | +-----------------------------+-----------------------------+ |Standard |See standards(5). | +-----------------------------+-----------------------------+ SEE ALSO
close(2), exec(2), exit(2), fork(2), lseek(2), read(2), write(2), fsync(3C), aio.h(3HEAD), signal.h(3HEAD), aio_cancel(3C), aio_fsync(3C), aio_read(3C), lio_listio(3C), attributes(5), lf64(5), standards(5) NOTES
Solaris 2.6 was the first release to support the Asynchronous Input and Output option. Prior to this release, this function always returned -1 and set errno to ENOSYS. SunOS 5.11 5 Feb 2008 aio_return(3C)

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AIO_RETURN(3)						     Linux Programmer's Manual						     AIO_RETURN(3)

NAME
aio_return - get return status of asynchronous I/O operation SYNOPSIS
#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 | +-------------+---------------+---------+ CONFORMING TO
POSIX.1-2001, POSIX.1-2008. EXAMPLE
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) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. 2017-09-15 AIO_RETURN(3)
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