diff options
author | px4dev <px4@purgatory.org> | 2012-08-04 15:12:36 -0700 |
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committer | px4dev <px4@purgatory.org> | 2012-08-04 15:12:36 -0700 |
commit | 8a365179eafdf3aea98e60ab9f5882b200d4c759 (patch) | |
tree | 4f38d6d4cd80bd0b6e22e2bb534c3f117ce44e56 /nuttx/binfmt/binfmt_unregister.c | |
download | px4-firmware-8a365179eafdf3aea98e60ab9f5882b200d4c759.tar.gz px4-firmware-8a365179eafdf3aea98e60ab9f5882b200d4c759.tar.bz2 px4-firmware-8a365179eafdf3aea98e60ab9f5882b200d4c759.zip |
Fresh import of the PX4 firmware sources.
Diffstat (limited to 'nuttx/binfmt/binfmt_unregister.c')
-rw-r--r-- | nuttx/binfmt/binfmt_unregister.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/nuttx/binfmt/binfmt_unregister.c b/nuttx/binfmt/binfmt_unregister.c new file mode 100644 index 000000000..1b50b2c58 --- /dev/null +++ b/nuttx/binfmt/binfmt_unregister.c @@ -0,0 +1,138 @@ +/**************************************************************************** + * binfmt/binfmt_unregister.c + * + * Copyright (C) 2009 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <string.h> +#include <sched.h> +#include <debug.h> +#include <errno.h> + +#include <nuttx/binfmt.h> + +#include "binfmt_internal.h" + +#ifndef CONFIG_BINFMT_DISABLE + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: unregister_binfmt + * + * Description: + * Register 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 */ + |