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Diffstat (limited to 'nuttx/sched/mq_open.c')
| -rw-r--r-- | nuttx/sched/mq_open.c | 235 |
1 files changed, 0 insertions, 235 deletions
diff --git a/nuttx/sched/mq_open.c b/nuttx/sched/mq_open.c deleted file mode 100644 index 89d80f072..000000000 --- a/nuttx/sched/mq_open.c +++ /dev/null @@ -1,235 +0,0 @@ -/**************************************************************************** - * sched/mq_open.c - * - * Copyright (C) 2007-2009, 2011 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 <sys/types.h> -#include <stdint.h> -#include <stdarg.h> -#include <mqueue.h> -#include <fcntl.h> -#include <string.h> -#include <sched.h> -#include <errno.h> -#include <debug.h> - -#include <nuttx/kmalloc.h> - -#include "os_internal.h" -#include "mq_internal.h" - -/**************************************************************************** - * Definitions - ****************************************************************************/ - -/**************************************************************************** - * Private Type Declarations - ****************************************************************************/ - -/**************************************************************************** - * Global Variables - ****************************************************************************/ - -/**************************************************************************** - * Private Variables - ****************************************************************************/ - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: mq_open - * - * Description: - * This function establish a connection between a named message queue and - * the calling task. After a successful call of mq_open(), the task can - * reference the message queue using the address returned by the call. The - * message queue remains usable until it is closed by a successful call to - * mq_close(). - * - * Parameters: - * mq_name - Name of the queue to open - * oflags - open flags - * Optional parameters. When the O_CREAT flag is specified, two optional - * parameters are expected: - * - * 1. mode_t mode (ignored), and - * 2. struct mq_attr *attr. The mq_maxmsg attribute - * is used at the time that the message queue is - * created to determine the maximum number of - * messages that may be placed in the message queue. - * - * Return Value: - * A message queue descriptor or -1 (ERROR) - * - * Assumptions: - * - ****************************************************************************/ - -mqd_t mq_open(const char *mq_name, int oflags, ...) -{ - FAR _TCB *rtcb = (FAR _TCB*)g_readytorun.head; - FAR msgq_t *msgq; - mqd_t mqdes = NULL; - va_list arg; /* Points to each un-named argument */ - struct mq_attr *attr; /* MQ creation attributes */ - int namelen; /* Length of MQ name */ - - /* Make sure that a non-NULL name is supplied */ - - if (mq_name) - { - sched_lock(); - namelen = strlen(mq_name); - if (namelen > 0) - { - /* See if the message queue already exists */ - - msgq = mq_findnamed(mq_name); - if (msgq) - { - /* It does. Check if the caller wanted to create a new - * message queue with this name (i.e., O_CREAT|O_EXCL) - */ - - if ((oflags & O_CREAT) == 0 || (oflags & O_EXCL) == 0) - { - /* Create a message queue descriptor for the TCB */ - - mqdes = mq_descreate(rtcb, msgq, oflags); - if (mqdes) - { - /* Allow a new connection to the message queue */ - - msgq->nconnect++; - } - } - } - - /* It doesn't exist. Should we create one? */ - - else if ((oflags & O_CREAT) != 0) - { - /* Allocate memory for the new message queue. The size to - * allocate is the size of the msgq_t header plus the size - * of the message queue name+1. - */ - - msgq = (FAR msgq_t*)kzalloc(SIZEOF_MQ_HEADER + namelen + 1); - if (msgq) - { - /* Create a message queue descriptor for the TCB */ - - mqdes = mq_descreate(rtcb, msgq, oflags); - if (mqdes) - { - /* Set up to get the optional arguments needed to create - * a message queue. - */ - - va_start(arg, oflags); - (void)va_arg(arg, mode_t); /* MQ creation mode parameter (ignored) */ - attr = va_arg(arg, struct mq_attr*); - - /* Initialize the new named message queue */ - - sq_init(&msgq->msglist); - if (attr) - { - msgq->maxmsgs = (int16_t)attr->mq_maxmsg; - if (attr->mq_msgsize <= MQ_MAX_BYTES) - { - msgq->maxmsgsize = (int16_t)attr->mq_msgsize; - } - else - { - msgq->maxmsgsize = MQ_MAX_BYTES; - } - } - else - { - msgq->maxmsgs = MQ_MAX_MSGS; - msgq->maxmsgsize = MQ_MAX_BYTES; - } - - msgq->nconnect = 1; -#ifndef CONFIG_DISABLE_SIGNALS - msgq->ntpid = INVALID_PROCESS_ID; -#endif - strcpy(msgq->name, mq_name); - - /* Add the new message queue to the list of - * message queues - */ - - sq_addlast((FAR sq_entry_t*)msgq, &g_msgqueues); - - /* Clean-up variable argument stuff */ - - va_end(arg); - } - else - { - /* Deallocate the msgq structure. Since it is - * uninitialized, mq_deallocate() is not used. - */ - - sched_free(msgq); - } - } - } - } - - sched_unlock(); - } - - if (mqdes == NULL) - { - return (mqd_t)ERROR; - } - else - { - return mqdes; - } -} |