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Diffstat (limited to 'nuttx/sched/mq_close.c')
| -rw-r--r-- | nuttx/sched/mq_close.c | 187 |
1 files changed, 0 insertions, 187 deletions
diff --git a/nuttx/sched/mq_close.c b/nuttx/sched/mq_close.c deleted file mode 100644 index 57780a8e6..000000000 --- a/nuttx/sched/mq_close.c +++ /dev/null @@ -1,187 +0,0 @@ -/**************************************************************************** - * sched/mq_close.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 <mqueue.h> -#include <sched.h> - -#include "os_internal.h" -#include "mq_internal.h" - -/**************************************************************************** - * Definitions - ****************************************************************************/ - -/**************************************************************************** - * Private Type Declarations - ****************************************************************************/ - -/**************************************************************************** - * Global Variables - ****************************************************************************/ - -/**************************************************************************** - * Private Variables - ****************************************************************************/ - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: mq_desfree - * - * Description: - * Deallocate a message queue descriptor but returning it to the free list - * - * Inputs: - * mqdes - message queue descriptor to free - * - ****************************************************************************/ - -#define mq_desfree(mqdes) sq_addlast((FAR sq_entry_t*)mqdes, &g_desfree) - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: mq_close - * - * Description: - * This function is used to indicate that the calling task is finished - * with the specified message queued mqdes. The mq_close() deallocates - * any system resources allocated by the system for use by this task for - * its message queue. - * - * If the calling task has attached a notification to the message queue - * via this mqdes, this attachment will be removed and the message queue - * is available for another process to attach a notification. - * - * Parameters: - * mqdes - Message queue descriptor. - * - * Return Value: - * 0 (OK) if the message queue is closed successfully, - * otherwise, -1 (ERROR). - * - * Assumptions: - * - The behavior of a task that is blocked on either a mq_send() or - * mq_receive() is undefined when mq_close() is called. - * - The results of using this message queue descriptor after a successful - * return from mq_close() is undefined. - * - ****************************************************************************/ - -int mq_close(mqd_t mqdes) -{ - FAR _TCB *rtcb = (FAR _TCB*)g_readytorun.head; - FAR msgq_t *msgq; - irqstate_t saved_state; - int ret = ERROR; - - /* Verify the inputs */ - - if (mqdes) - { - sched_lock(); - - /* Remove the message descriptor from the current task's - * list of message descriptors. - */ - - sq_rem((FAR sq_entry_t*)mqdes, &rtcb->msgdesq); - - /* Find the message queue associated with the message descriptor */ - - msgq = mqdes->msgq; - - /* Check if the calling task has a notification attached to - * the message queue via this mqdes. - */ - -#ifndef CONFIG_DISABLE_SIGNALS - if (msgq->ntmqdes == mqdes) - { - msgq->ntpid = INVALID_PROCESS_ID; - msgq->ntsigno = 0; - msgq->ntvalue.sival_int = 0; - msgq->ntmqdes = NULL; - } -#endif - - /* Decrement the connection count on the message queue. */ - - if (msgq->nconnect) - { - msgq->nconnect--; - } - - /* If it is no longer connected to any message descriptor and if the - * message queue has already been unlinked, then we can discard the - * message queue. - */ - - if (!msgq->nconnect && msgq->unlinked) - { - /* Remove the message queue from the list of all - * message queues - */ - - saved_state = irqsave(); - (void)sq_rem((FAR sq_entry_t*)msgq, &g_msgqueues); - irqrestore(saved_state); - - /* Then deallocate it (and any messages left in it) */ - - mq_msgqfree(msgq); - } - - /* Deallocate the message descriptor */ - - mq_desfree(mqdes); - - sched_unlock(); - ret = OK; - } - - return ret; -} - |