46 lines · plain
1.. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later2.. c:namespace:: MC.request3 4.. _request-func-close:5 6***************7request close()8***************9 10Name11====12 13request-close - Close a request file descriptor14 15Synopsis16========17 18.. code-block:: c19 20 #include <unistd.h>21 22.. c:function:: int close( int fd )23 24Arguments25=========26 27``fd``28 File descriptor returned by :ref:`MEDIA_IOC_REQUEST_ALLOC`.29 30Description31===========32 33Closes the request file descriptor. Resources associated with the request34are freed once all file descriptors associated with the request are closed35and the driver has completed the request.36See :ref:`here <media-request-life-time>` for more information.37 38Return Value39============40 41:c:func:`close()` returns 0 on success. On error, -1 is42returned, and ``errno`` is set appropriately. Possible error codes are:43 44EBADF45 ``fd`` is not a valid open file descriptor.46