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134 lines
4.6 KiB
134 lines
4.6 KiB
/************************************************************************ |
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* sched/mq_msgfree.c |
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* |
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* Copyright (C) 2007 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <gnutt@nuttx.org> |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* 3. Neither the name NuttX nor the names of its contributors may be |
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* used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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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 <queue.h> |
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#include <nuttx/arch.h> |
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#include "os_internal.h" |
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#include "mq_internal.h" |
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/************************************************************************ |
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* Definitions |
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************************************************************************/ |
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/************************************************************************ |
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* Private Type Declarations |
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************************************************************************/ |
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/************************************************************************ |
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* Global Variables |
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************************************************************************/ |
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/************************************************************************ |
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* Private Variables |
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************************************************************************/ |
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/************************************************************************ |
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* Private Functions |
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************************************************************************/ |
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/************************************************************************ |
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* Public Functions |
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************************************************************************/ |
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/************************************************************************ |
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* Name: mq_msgfree |
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* |
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* Description: |
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* The mq_msgfree function will return a message to the free pool of |
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* messages if it was a pre-allocated message. If the message was |
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* allocated dynamically it will be deallocated. |
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* |
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* Inputs: |
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* mqmsg - message to free |
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* |
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* Return Value: |
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* None |
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* |
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************************************************************************/ |
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void mq_msgfree(FAR mqmsg_t *mqmsg) |
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{ |
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irqstate_t saved_state; |
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/* If this is a generally available pre-allocated message, |
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* then just put it back in the free list. |
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*/ |
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if (mqmsg->type == MQ_ALLOC_FIXED) |
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{ |
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/* Make sure we avoid concurrent access to the free |
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* list from interrupt handlers. |
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*/ |
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saved_state = irqsave(); |
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sq_addlast((FAR sq_entry_t*)mqmsg, &g_msgfree); |
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irqrestore(saved_state); |
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} |
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/* If this is a message pre-allocated for interrupts, |
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* then put it back in the correct free list. |
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*/ |
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else if (mqmsg->type == MQ_ALLOC_IRQ) |
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{ |
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/* Make sure we avoid concurrent access to the free |
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* list from interrupt handlers. |
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*/ |
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saved_state = irqsave(); |
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sq_addlast((FAR sq_entry_t*)mqmsg, &g_msgfreeirq); |
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irqrestore(saved_state); |
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} |
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/* Otherwise, deallocate it. Note: interrupt handlers |
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* will never deallocate messages because they will not |
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* received them. |
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*/ |
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else if (mqmsg->type == MQ_ALLOC_DYN) |
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{ |
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sched_free(mqmsg); |
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} |
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else |
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{ |
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PANIC(OSERR_BADMSGTYPE); |
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} |
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}
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