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Diffstat (limited to 'nuttx/sched/mq_send.c')
| -rw-r--r-- | nuttx/sched/mq_send.c | 184 |
1 files changed, 0 insertions, 184 deletions
diff --git a/nuttx/sched/mq_send.c b/nuttx/sched/mq_send.c deleted file mode 100644 index 40628e924..000000000 --- a/nuttx/sched/mq_send.c +++ /dev/null @@ -1,184 +0,0 @@ -/**************************************************************************** - * sched/mq_send.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 <sys/types.h> -#include <mqueue.h> -#include <errno.h> -#include <debug.h> - -#include <nuttx/arch.h> - -#include "os_internal.h" -#include "mq_internal.h" - -/**************************************************************************** - * Definitions - ****************************************************************************/ - -/**************************************************************************** - * Private Type Declarations - ****************************************************************************/ - -/**************************************************************************** - * Global Variables - ****************************************************************************/ - -/**************************************************************************** - * Private Variables - ****************************************************************************/ - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: mq_send - * - * Description: - * This function adds the specificied message (msg) to the message queue - * (mqdes). The "msglen" parameter specifies the length of the message - * in bytes pointed to by "msg." This length must not exceed the maximum - * message length from the mq_getattr(). - * - * If the message queue is not full, mq_send() place the message in the - * message queue at the position indicated by the "prio" argrument. - * Messages with higher priority will be inserted before lower priority - * messages. The value of "prio" must not exceed MQ_PRIO_MAX. - * - * If the specified message queue is full and O_NONBLOCK is not set in the - * message queue, then mq_send() will block until space becomes available - * to the queue the message. - * - * If the message queue is full and O_NONBLOCK is set, the message is not - * queued and ERROR is returned. - * - * Parameters: - * mqdes - Message queue descriptor - * msg - Message to send - * msglen - The length of the message in bytes - * prio - The priority of the message - * - * Return Value: - * On success, mq_send() returns 0 (OK); on error, -1 (ERROR) - * is returned, with errno set to indicate the error: - * - * EAGAIN The queue was empty, and the O_NONBLOCK flag was set for the - * message queue description referred to by mqdes. - * EINVAL Either msg or mqdes is NULL or the value of prio is invalid. - * EPERM Message queue opened not opened for writing. - * EMSGSIZE 'msglen' was greater than the maxmsgsize attribute of the - * message queue. - * EINTR The call was interrupted by a signal handler. - * - * Assumptions/restrictions: - * - ****************************************************************************/ - -int mq_send(mqd_t mqdes, const void *msg, size_t msglen, int prio) -{ - FAR msgq_t *msgq; - FAR mqmsg_t *mqmsg = NULL; - irqstate_t saved_state; - int ret = ERROR; - - /* Verify the input parameters -- setting errno appropriately - * on any failures to verify. - */ - - if (mq_verifysend(mqdes, msg, msglen, prio) != OK) - { - return ERROR; - } - - /* Get a pointer to the message queue */ - - sched_lock(); - msgq = mqdes->msgq; - - /* Allocate a message structure: - * - Immediately if we are called from an interrupt handler. - * - Immediately if the message queue is not full, or - * - After successfully waiting for the message queue to become - * non-FULL. This would fail with EAGAIN, EINTR, or ETIMEOUT. - */ - - saved_state = irqsave(); - if (up_interrupt_context() || /* In an interrupt handler */ - msgq->nmsgs < msgq->maxmsgs || /* OR Message queue not full */ - mq_waitsend(mqdes) == OK) /* OR Successfully waited for mq not full */ - { - /* Allocate the message */ - - irqrestore(saved_state); - mqmsg = mq_msgalloc(); - } - else - { - /* We cannot send the message (and didn't even try to allocate it) - * because: - * - We are not in an interrupt handler AND - * - The message queue is full AND - * - When we tried waiting, the wait was unsuccessful. - */ - - irqrestore(saved_state); - } - - /* Check if we were able to get a message structure -- this can fail - * either because we cannot send the message (and didn't bother trying - * to allocate it) or because the allocation failed. - */ - - if (mqmsg) - { - /* Yes, perform the message send. */ - - ret = mq_dosend(mqdes, mqmsg, msg, msglen, prio); - } - - sched_unlock(); - return ret; -} - |