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Complete re-implementation of mq_close

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This commit is contained in:
Gregory Nutt 2014-09-29 15:33:34 -06:00
parent 584d0fe4ad
commit 1f2cc9f4fe
13 changed files with 167 additions and 71 deletions
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69
fs/mqueue/mq_close.c
View File

@ -39,11 +39,15 @@
#include <nuttx/config.h>
#include <mqueue.h>
#include <sched.h>
#include <mqueue.h>
#include <assert.h>
#include "sched/sched.h"
#include <nuttx/kmalloc.h>
#include <nuttx/sched.h>
#include <nuttx/mqueue.h>
#include "inode/inode.h"
#include "mqueue/mqueue.h"
/****************************************************************************
@ -66,19 +70,6 @@
* 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
****************************************************************************/
@ -113,11 +104,10 @@
int mq_close(mqd_t mqdes)
{
FAR struct tcb_s *rtcb = (FAR struct tcb_s*)g_readytorun.head;
FAR struct tcb_s *rtcb = sched_self();
FAR struct task_group_s *group = rtcb->group;
FAR struct mqueue_inode_s *msgq;
irqstate_t saved_state;
int ret = ERROR;
struct inode *inode ;
DEBUGASSERT(group);
@ -136,6 +126,12 @@ int mq_close(mqd_t mqdes)
/* Find the message queue associated with the message descriptor */
msgq = mqdes->msgq;
DEBUGASSERT(msgq && msgq->inode);
/* Get the inode from the message queue structure */
inode = msgq->inode;
DEBUGASSERT(inode->u.i_mqueue == msgq);
/* Check if the calling task has a notification attached to
* the message queue via this mqdes.
@ -151,31 +147,31 @@ int mq_close(mqd_t mqdes)
}
#endif
/* Decrement the connection count on the message queue. */
/* Decrement the reference count on the inode */
if (msgq->nconnect)
inode_semtake();
if (inode->i_crefs > 0)
{
msgq->nconnect--;
inode->i_crefs--;
}
/* 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 the message queue was previously unlinked and the reference
* count has decremented to zero, then release the message queue and
* delete the inode now.
*/
if (!msgq->nconnect && msgq->unlinked)
if (inode->i_crefs <= 0 && (inode->i_flags & FSNODEFLAG_DELETED) != 0)
{
/* 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) */
/* Free the message queue (and any messages left in it) */
mq_msgqfree(msgq);
/* Release and free the inode container */
inode_semgive();
inode_free(inode->i_child);
kmm_free(inode);
return OK;
}
/* Deallocate the message descriptor */
@ -183,9 +179,8 @@ int mq_close(mqd_t mqdes)
mq_desfree(mqdes);
sched_unlock();
ret = OK;
inode_semgive();
}
return ret;
return OK;
}

3
fs/mqueue/mq_open.c
View File

@ -234,9 +234,10 @@ mqd_t mq_open(const char *mq_name, int oflags, ...)
goto errout_with_msgq;
}
/* Save the message queue in the inode structure */
/* Bind the message queue and the inode structure */
inode->u.i_mqueue = msgq;
msgq->inode = inode;
}
}

2
fs/semaphore/sem_close.c
View File

@ -117,7 +117,7 @@ int sem_close(FAR sem_t *sem)
/* Decrement the reference count on the inode */
inode_semtake();
if (inode->i_crefs)
if (inode->i_crefs > 0)
{
inode->i_crefs--;
}

14
include/nuttx/mqueue.h
View File

@ -66,6 +66,7 @@ struct mq_des; /* forward reference */
struct mqueue_inode_s
{
FAR struct inode *inode; /* Containing inode */
sq_queue_t msglist; /* Prioritized message list */
int16_t maxmsgs; /* Maximum number of messages in the queue */
int16_t nmsgs; /* Number of message in the queue */
@ -175,6 +176,19 @@ struct tcb_s;
mqd_t mq_descreate(FAR struct tcb_s* mtcb, FAR struct mqueue_inode_s* msgq,
int oflags);
/****************************************************************************
* Name: mq_desfree
*
* Description:
* Deallocate a message queue descriptor but returning it to the free list
*
* Inputs:
* mqdes - message queue descriptor to free
*
****************************************************************************/
void mq_desfree(mqd_t mqdes);
#undef EXTERN
#ifdef __cplusplus
}

4
include/nuttx/sched.h
View File

@ -116,6 +116,10 @@
#endif
/* Task Management Definitions **************************************************/
/* Special task IDS. Any negative PID is invalid. */
#define NULL_TASK_PROCESS_ID (pid_t)0
#define INVALID_PROCESS_ID (pid_t)-1
/* This is the maximum number of times that a lock can be set */

2
include/nuttx/semaphore.h
View File

@ -62,8 +62,8 @@ struct nsem_inode_s
{
/* Inode payload unique to named semaphores */
sem_t ns_sem; /* The semaphore */
FAR struct inode *ns_inode; /* Containing inode */
sem_t ns_sem; /* The semaphore */
};
#endif

1
sched/init/os_start.c
View File

@ -45,6 +45,7 @@
#include <nuttx/arch.h>
#include <nuttx/compiler.h>
#include <nuttx/sched.h>
#include <nuttx/fs/fs.h>
#include <nuttx/net/net.h>
#include <nuttx/lib.h>

4
sched/mqueue/Make.defs
View File

@ -37,8 +37,8 @@ ifneq ($(CONFIG_DISABLE_MQUEUE),y)
MQUEUE_SRCS = mq_send.c mq_timedsend.c mq_sndinternal.c mq_receive.c
MQUEUE_SRCS += mq_timedreceive.c mq_rcvinternal.c mq_initialize.c
MQUEUE_SRCS += mq_descreate.c mq_msgfree.c mq_msgqalloc.c mq_msgqfree.c
MQUEUE_SRCS += mq_release.c mq_recover.c
MQUEUE_SRCS += mq_descreate.c mq_desfree.c mq_msgfree.c mq_msgqalloc.c
MQUEUE_SRCS += mq_msgqfree.c mq_release.c mq_recover.c
ifneq ($(CONFIG_DISABLE_SIGNALS),y)
MQUEUE_SRCS += mq_waitirq.c mq_notify.c

82
sched/mqueue/mq_desfree.c Normal file
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@ -0,0 +1,82 @@
/****************************************************************************
* sched/mqueue/mq_desfree.c
*
* Copyright (C) 2007-2009, 2013 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/mqueue.h>
#include "mqueue/mqueue.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Type Declarations
****************************************************************************/
/****************************************************************************
* Public 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
*
****************************************************************************/
void mq_desfree(mqd_t mqdes)
{
sq_addlast((FAR sq_entry_t*)mqdes, &g_desfree);
}

2
sched/mqueue/mq_notify.c
View File

@ -44,6 +44,8 @@
#include <sched.h>
#include <errno.h>
#include <nuttx/sched.h>
#include "sched/sched.h"
#include "mqueue/mqueue.h"

2
sched/mqueue/mq_sndinternal.c
View File

@ -50,7 +50,7 @@
#include <nuttx/kmalloc.h>
#include <nuttx/arch.h>
#include <nuttx/sched.h>
#include "sched/sched.h"
#ifndef CONFIG_DISABLE_SIGNALS
# include "signal/signal.h"

5
sched/sched/sched.h
View File

@ -53,11 +53,6 @@
* Pre-processor Definitions
****************************************************************************/
/* Special task IDS. Any negative PID is invalid. */
#define NULL_TASK_PROCESS_ID (pid_t)0
#define INVALID_PROCESS_ID (pid_t)-1
/* Although task IDs can take the (positive, non-zero)
* range of pid_t, the number of tasks that will be supported
* at any one time is (artificially) limited by the CONFIG_MAX_TASKS

2
sched/sched/sched_releasetcb.c
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@ -42,7 +42,9 @@
#include <sys/types.h>
#include <sched.h>
#include <errno.h>
#include <nuttx/arch.h>
#include <nuttx/sched.h>
#include "sched/sched.h"
#include "group/group.h"