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- /****************************************************************************
- * binfmt/binfmt_unregister.c
- *
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership. The
- * ASF licenses this file to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance with the
- * License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations
- * under the License.
- *
- ****************************************************************************/
- /****************************************************************************
- * Included Files
- ****************************************************************************/
- #include <nuttx/config.h>
- #include <string.h>
- #include <sched.h>
- #include <debug.h>
- #include <errno.h>
- #include <nuttx/binfmt/binfmt.h>
- #include "binfmt.h"
- #ifndef CONFIG_BINFMT_DISABLE
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: unregister_binfmt
- *
- * Description:
- * Unregister a loader for a binary format
- *
- * Returned Value:
- * This is a NuttX internal function so it follows the convention that
- * 0 (OK) is returned on success and a negated errno is returned on
- * failure.
- *
- ****************************************************************************/
- int unregister_binfmt(FAR struct binfmt_s *binfmt)
- {
- FAR struct binfmt_s *curr;
- FAR struct binfmt_s *prev;
- int ret = -EINVAL;
- if (binfmt)
- {
- /* Disabling pre-emption should be sufficient protection while
- * accessing the list of registered binary format handlers.
- */
- sched_lock();
- /* Search the list of registered binary format handlers for the
- * one to be unregistered.
- */
- for (prev = NULL, curr = g_binfmts;
- curr && curr != binfmt;
- prev = curr, curr = curr->next);
- /* Was it in the list? */
- if (curr)
- {
- /* Yes.. was it at the head of the list? */
- if (!prev)
- {
- /* Yes.. remove it from the head of the list */
- g_binfmts = binfmt->next;
- }
- else
- {
- /* No.. remove it from the middle/end of the list */
- prev->next = binfmt->next;
- }
- binfmt->next = NULL;
- ret = OK;
- }
- sched_unlock();
- }
- return ret;
- }
- #endif /* CONFIG_BINFMT_DISABLE */
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