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Diffstat (limited to 'nuttx/sched/mq_msgqfree.c')
-rw-r--r-- | nuttx/sched/mq_msgqfree.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/nuttx/sched/mq_msgqfree.c b/nuttx/sched/mq_msgqfree.c new file mode 100644 index 000000000..d7d87db3d --- /dev/null +++ b/nuttx/sched/mq_msgqfree.c @@ -0,0 +1,108 @@ +/************************************************************************ + * sched/mq_msgqfree.c + * + * Copyright (C) 2007, 2009 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * 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 <debug.h> +#include <nuttx/kmalloc.h> +#include "mq_internal.h" + +/************************************************************************ + * Definitions + ************************************************************************/ + +/************************************************************************ + * Private Type Declarations + ************************************************************************/ + +/************************************************************************ + * Global Variables + ************************************************************************/ + +/************************************************************************ + * Private Variables + ************************************************************************/ + +/************************************************************************ + * Private Functions + ************************************************************************/ + +/************************************************************************ + * Public Functions + ************************************************************************/ + +/************************************************************************ + * Name: mq_msgqfree + * + * Description: + * This function deallocates an initialized message queue + * structure. First, it deallocates all of the queued + * messages in the message Q. It is assumed that this + * message is fully unlinked and closed so that not thread + * will attempt access it while it is being deleted. + * + * Inputs: + * msgq - Named essage queue to be freed + * + * Return Value: + * None + * + ************************************************************************/ + +void mq_msgqfree(FAR msgq_t *msgq) +{ + FAR mqmsg_t *curr; + FAR mqmsg_t *next; + + /* Deallocate any stranded messages in the message queue. */ + + curr = (FAR mqmsg_t*)msgq->msglist.head; + while (curr) + { + /* Deallocate the message structure. */ + + next = curr->next; + mq_msgfree(curr); + curr = next; + } + + /* Then deallocate the message queue itself */ + + sched_free(msgq); +} |