72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
/****************************************************************************
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* libs/libnx/nxmu/nx_releasebkgd.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/nx/nx.h>
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#include <nuttx/nx/nxbe.h>
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#include <nuttx/nx/nxmu.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nx_releasebkgd
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*
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* Description:
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* Release the background window previously acquired using nx_openbgwindow
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* and return control of the background to NX.
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*
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* Input Parameters:
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* hwnd - The handle returned (indirectly) by nx_requestbkgd
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*
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* Returned Value:
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* OK on success; ERROR on failure with errno set appropriately
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*
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****************************************************************************/
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int nx_releasebkgd(NXWINDOW hwnd)
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{
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FAR struct nxbe_window_s *wnd = (FAR struct nxbe_window_s *)hwnd;
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struct nxsvrmsg_releasebkgd_s outmsg;
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#ifdef CONFIG_DEBUG_FEATURES
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if (!wnd)
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{
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set_errno(EINVAL);
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return ERROR;
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}
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#endif
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/* Request access to the background window from the server */
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outmsg.msgid = NX_SVRMSG_RELEASEBKGD;
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return nxmu_sendserver(wnd->conn, &outmsg,
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sizeof(struct nxsvrmsg_releasebkgd_s));
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}
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