aio_return(3) - Linux manual page (original) (raw)

aioreturn(3) Library Functions Manual aioreturn(3)

NAME top

   aio_return - get return status of asynchronous I/O operation

LIBRARY top

   Real-time library (_librt_, _-lrt_)

SYNOPSIS top

   **#include <aio.h>**

   **ssize_t aio_return(struct aiocb ***_aiocbp_**);**

DESCRIPTION top

   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)](../man7/aio.7.html) for a description of the _aiocb_ structure.)

   This function should be called only once for any given request,
   after [aio_error(3)](../man3/aio%5Ferror.3.html) returns something other than **EINPROGRESS**.

RETURN VALUE top

   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)](../man2/read.2.html), [write(2)](../man2/write.2.html), [fsync(2)](../man2/fsync.2.html), or [fdatasync(2)](../man2/fdatasync.2.html), call.
   On error, -1 is returned, and _[errno](../man3/errno.3.html)_ 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 top

   **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 top

   For an explanation of the terms used in this section, see
   [attributes(7)](../man7/attributes.7.html).
   ┌──────────────────────────────────────┬───────────────┬─────────┐
   │ **Interface** │ **Attribute** │ **Value** │
   ├──────────────────────────────────────┼───────────────┼─────────┤
   │ **aio_return**()                         │ Thread safety │ MT-Safe │
   └──────────────────────────────────────┴───────────────┴─────────┘

STANDARDS top

   POSIX.1-2008.

HISTORY top

   glibc 2.1.  POSIX.1-2001.

EXAMPLES top

   See [aio(7)](../man7/aio.7.html).

SEE ALSO top

   [aio_cancel(3)](../man3/aio%5Fcancel.3.html), [aio_error(3)](../man3/aio%5Ferror.3.html), [aio_fsync(3)](../man3/aio%5Ffsync.3.html), [aio_read(3)](../man3/aio%5Fread.3.html),
   [aio_suspend(3)](../man3/aio%5Fsuspend.3.html), [aio_write(3)](../man3/aio%5Fwrite.3.html), [lio_listio(3)](../man3/lio%5Flistio.3.html), [aio(7)](../man7/aio.7.html)

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Linux man-pages 6.10 2024-07-23 aioreturn(3)

Pages that refer to this page:aio_cancel(3), aiocb(3type), aio_error(3), aio_fsync(3), aio_read(3), aio_suspend(3), aio_write(3), lio_listio(3), aio(7), signal-safety(7)