diff options
Diffstat (limited to 'nuttx/sched/mq_timedsend.c')
| -rw-r--r-- | nuttx/sched/mq_timedsend.c | 319 |
1 files changed, 0 insertions, 319 deletions
diff --git a/nuttx/sched/mq_timedsend.c b/nuttx/sched/mq_timedsend.c deleted file mode 100644 index 745cc6272..000000000 --- a/nuttx/sched/mq_timedsend.c +++ /dev/null @@ -1,319 +0,0 @@ -/**************************************************************************** - * sched/mq_timedsend.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 <stdbool.h> -#include <unistd.h> -#include <mqueue.h> -#include <wdog.h> -#include <errno.h> -#include <debug.h> -#include <nuttx/arch.h> - -#include "clock_internal.h" -#include "os_internal.h" -#include "mq_internal.h" - -/**************************************************************************** - * Pre-processor Definitions - ****************************************************************************/ - -/**************************************************************************** - * Private Type Declarations - ****************************************************************************/ - -/**************************************************************************** - * Global Variables - ****************************************************************************/ - -/**************************************************************************** - * Private Variables - ****************************************************************************/ - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: mq_sndtimeout - * - * Description: - * This function is called if the timeout elapses before the message queue - * becomes non-full. - * - * Parameters: - * argc - the number of arguments (should be 1) - * pid - the task ID of the task to wakeup - * - * Return Value: - * None - * - * Assumptions: - * - ****************************************************************************/ - -static void mq_sndtimeout(int argc, uint32_t pid) -{ - FAR _TCB *wtcb; - irqstate_t saved_state; - - /* Disable interrupts. This is necessary because an interrupt handler may - * attempt to send a message while we are doing this. - */ - - saved_state = irqsave(); - - /* Get the TCB associated with this pid. It is possible that task may no - * longer be active when this watchdog goes off. - */ - - wtcb = sched_gettcb((pid_t)pid); - - /* It is also possible that an interrupt/context switch beat us to the - * punch and already changed the task's state. - */ - - if (wtcb && wtcb->task_state == TSTATE_WAIT_MQNOTFULL) - { - /* Restart with task with a timeout error */ - - mq_waitirq(wtcb, ETIMEDOUT); - } - - /* Interrupts may now be re-enabled. */ - - irqrestore(saved_state); -} - -/**************************************************************************** - * 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_timedsend() 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_timedsend() will block until space becomes available - * to the queue the message or a timeout occurs. - * - * mq_timedsend() behaves just like mq_send(), except that if the queue - * is full and the O_NONBLOCK flag is not enabled for the message queue - * description, then abstime points to a structure which specifies a - * ceiling on the time for which the call will block. This ceiling is an - * absolute timeout in seconds and nanoseconds since the Epoch (midnight - * on the morning of 1 January 1970). - * - * If the message queue is full, and the timeout has already expired by - * the time of the call, mq_timedsend() returns immediately. - * - * Parameters: - * mqdes - Message queue descriptor - * msg - Message to send - * msglen - The length of the message in bytes - * prio - The priority of the message - * abstime - the absolute time to wait until a timeout is decleared - * - * 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_timedsend(mqd_t mqdes, const char *msg, size_t msglen, int prio, - const struct timespec *abstime) -{ - WDOG_ID wdog; - FAR msgq_t *msgq; - FAR mqmsg_t *mqmsg = NULL; - irqstate_t saved_state; - int ret = ERROR; - - DEBUGASSERT(up_interrupt_context() == false); - - /* Verify the input parameters -- setting errno appropriately - * on any failures to verify. - */ - - if (mq_verifysend(mqdes, msg, msglen, prio) != OK) - { - return ERROR; - } - - if (!abstime || abstime->tv_sec < 0 || abstime->tv_nsec > 1000000000) - { - set_errno(EINVAL); - return ERROR; - } - - /* Get a pointer to the message queue */ - - msgq = mqdes->msgq; - - /* Create a watchdog. We will not actually need this watchdog - * unless the queue is full, but we will reserve it up front - * before we enter the following critical section. - */ - - wdog = wd_create(); - if (!wdog) - { - set_errno(EINVAL); - return ERROR; - } - - /* Allocate a message structure: - * - If we are called from an interrupt handler, or - * - If the message queue is not full, or - */ - - sched_lock(); - saved_state = irqsave(); - if (up_interrupt_context() || /* In an interrupt handler */ - msgq->nmsgs < msgq->maxmsgs) /* OR Message queue not full */ - { - /* Allocate the message */ - - irqrestore(saved_state); - mqmsg = mq_msgalloc(); - } - else - { - int ticks; - - /* We are not in an interupt handler and the message queue is full. - * set up a timed wait for the message queue to become non-full. - * - * Convert the timespec to clock ticks. We must have interrupts - * disabled here so that this time stays valid until the wait begins. - */ - - int result = clock_abstime2ticks(CLOCK_REALTIME, abstime, &ticks); - - /* If the time has already expired and the message queue is empty, - * return immediately. - */ - - if (result == OK && ticks <= 0) - { - result = ETIMEDOUT; - } - - /* Handle any time-related errors */ - - if (result != OK) - { - set_errno(result); - ret = ERROR; - } - - /* Start the watchdog and begin the wait for MQ not full */ - - if (result == OK) - { - /* Start the watchdog */ - - wd_start(wdog, ticks, (wdentry_t)mq_sndtimeout, 1, getpid()); - - /* And wait for the message queue to be non-empty */ - - ret = mq_waitsend(mqdes); - - /* This may return with an error and errno set to either EINTR - * or ETIMEOUT. Cancel the watchdog timer in any event. - */ - - wd_cancel(wdog); - } - - /* That is the end of the atomic operations */ - - irqrestore(saved_state); - - /* If any of the above failed, set the errno. Otherwise, there should - * be space for another message in the message queue. NOW we can allocate - * the message structure. - */ - - if (ret == OK) - { - mqmsg = mq_msgalloc(); - } - } - - /* 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, peform the message send. */ - - ret = mq_dosend(mqdes, mqmsg, msg, msglen, prio); - } - - sched_unlock(); - wd_delete(wdog); - return ret; -} - |