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- /****************************************************************************
- * sched/mqueue/mq_msgfree.c
- *
- * Copyright (C) 2007, 2013, 2016 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 <queue.h>
- #include <nuttx/irq.h>
- #include <nuttx/arch.h>
- #include <nuttx/kmalloc.h>
- #include "mqueue/mqueue.h"
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: nxmq_free_msg
- *
- * Description:
- * The nxmq_free_msg function will return a message to the free pool of
- * messages if it was a pre-allocated message. If the message was
- * allocated dynamically it will be deallocated.
- *
- * Input Parameters:
- * mqmsg - message to free
- *
- * Returned Value:
- * None
- *
- ****************************************************************************/
- void nxmq_free_msg(FAR struct mqueue_msg_s *mqmsg)
- {
- irqstate_t flags;
- /* If this is a generally available pre-allocated message,
- * then just put it back in the free list.
- */
- if (mqmsg->type == MQ_ALLOC_FIXED)
- {
- /* Make sure we avoid concurrent access to the free
- * list from interrupt handlers.
- */
- flags = enter_critical_section();
- sq_addlast((FAR sq_entry_t *)mqmsg, &g_msgfree);
- leave_critical_section(flags);
- }
- /* If this is a message pre-allocated for interrupts,
- * then put it back in the correct free list.
- */
- else if (mqmsg->type == MQ_ALLOC_IRQ)
- {
- /* Make sure we avoid concurrent access to the free
- * list from interrupt handlers.
- */
- flags = enter_critical_section();
- sq_addlast((FAR sq_entry_t *)mqmsg, &g_msgfreeirq);
- leave_critical_section(flags);
- }
- /* Otherwise, deallocate it. Note: interrupt handlers
- * will never deallocate messages because they will not
- * received them.
- */
- else if (mqmsg->type == MQ_ALLOC_DYN)
- {
- sched_kfree(mqmsg);
- }
- else
- {
- DEBUGPANIC();
- }
- }
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