f9fb182809
Update files from Gregory Nutt to Apache 2.0 license. Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
106 lines
3 KiB
C
106 lines
3 KiB
C
/****************************************************************************
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* binfmt/binfmt_unregister.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 <string.h>
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#include <sched.h>
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#include <debug.h>
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#include <errno.h>
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#include <nuttx/binfmt/binfmt.h>
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#include "binfmt.h"
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#ifndef CONFIG_BINFMT_DISABLE
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: unregister_binfmt
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*
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* Description:
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* Unregister a loader for a binary format
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*
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* Returned Value:
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* This is a NuttX internal function so it follows the convention that
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* 0 (OK) is returned on success and a negated errno is returned on
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* failure.
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*
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****************************************************************************/
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int unregister_binfmt(FAR struct binfmt_s *binfmt)
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{
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FAR struct binfmt_s *curr;
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FAR struct binfmt_s *prev;
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int ret = -EINVAL;
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if (binfmt)
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{
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/* Disabling pre-emption should be sufficient protection while
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* accessing the list of registered binary format handlers.
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*/
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sched_lock();
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/* Search the list of registered binary format handlers for the
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* one to be unregistered.
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*/
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for (prev = NULL, curr = g_binfmts;
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curr && curr != binfmt;
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prev = curr, curr = curr->next);
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/* Was it in the list? */
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if (curr)
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{
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/* Yes.. was it at the head of the list? */
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if (!prev)
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{
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/* Yes.. remove it from the head of the list */
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g_binfmts = binfmt->next;
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}
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else
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{
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/* No.. remove it from the middle/end of the list */
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prev->next = binfmt->next;
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}
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binfmt->next = NULL;
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ret = OK;
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}
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sched_unlock();
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}
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return ret;
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}
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#endif /* CONFIG_BINFMT_DISABLE */
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