68 lines
2.8 KiB
C
68 lines
2.8 KiB
C
/****************************************************************************
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* libs/libnx/nxtk/nxtk_block.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 <nuttx/nx/nx.h>
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#include <nuttx/nx/nxtk.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: nxtk_block
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*
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* Description:
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* This is callback will do to things: (1) any queue a 'blocked' callback
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* to the window and then (2) block any further window messaging.
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*
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* The 'blocked' callback is the response from nx_block (or nxtk_block).
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* Those blocking interfaces are used to assure that no further messages
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* are are directed to the window. Receipt of the blocked callback
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* signifies that (1) there are no further pending callbacks and (2) that
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* the window is now 'defunct' and will receive no further callbacks.
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*
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* This callback supports coordinated destruction of a window in multi-
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* user mode. In multi-use mode, the client window logic must stay
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* intact until all of the queued callbacks are processed. Then the
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* window may be safely closed. Closing the window prior with pending
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* callbacks can lead to bad behavior when the callback is executed.
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*
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* Input Parameters:
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* hfwnd - The window to be blocked
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* arg - An argument that will accompany the block messages (This is arg2
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* in the blocked callback).
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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 nxtk_block(NXTKWINDOW hfwnd, FAR void *arg)
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{
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return nx_block((NXWINDOW)hfwnd, arg);
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}
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