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src/platforms/common: move to platforms/common
Script to update include paths: for i in $(grep -rl 'include <px4_work_queue' src platforms); do sed -i 's/#include <px4_work_queue/#include <px4_platform_common\/px4_work_queue/' $i; done
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/****************************************************************************
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* libc/wqueue/work_thread.c
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*
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* Copyright (C) 2009-2013 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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* Modified by: Mark Charlebois to use hrt compatible times
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <px4_config.h>
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#include <px4_defines.h>
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#include <px4_posix.h>
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#include <px4_tasks.h>
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#include <px4_time.h>
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#include <stdint.h>
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#include <signal.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <queue.h>
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#include <px4_workqueue.h>
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#include <drivers/drv_hrt.h>
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#include "hrt_work.h"
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#include <string.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Type Declarations
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****************************************************************************/
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/****************************************************************************
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* Public Variables
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****************************************************************************/
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/* The state of each work queue. */
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struct wqueue_s g_hrt_work;
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/****************************************************************************
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* Private Variables
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****************************************************************************/
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px4_sem_t _hrt_work_lock;
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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static void hrt_work_process(void);
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static void _sighandler(int sig_num);
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/****************************************************************************
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* Name: _sighandler
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*
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* Description:
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* This is the handler for the signal to wake the queue processing thread
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*
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* Input parameters:
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* sig_num - the received signal
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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static void _sighandler(int sig_num)
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{
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PX4_DEBUG("RECEIVED SIGNAL %d", sig_num);
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}
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/****************************************************************************
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* Name: work_process
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*
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* Description:
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* This is the logic that performs actions placed on any work list.
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*
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* Input parameters:
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* wqueue - Describes the work queue to be processed
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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static void hrt_work_process()
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{
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struct wqueue_s *wqueue = &g_hrt_work;
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volatile struct work_s *work;
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worker_t worker;
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void *arg;
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uint64_t elapsed;
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uint32_t remaining;
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uint32_t next;
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// set the threads name
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#ifdef __PX4_DARWIN
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pthread_setname_np("HRT");
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#else
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// The Linux headers do not actually contain this
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//rv = pthread_setname_np(pthread_self(), "HRT");
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#endif
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/* Then process queued work. We need to keep interrupts disabled while
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* we process items in the work list.
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*/
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/* Default to sleeping for 1 sec */
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next = 1000000;
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hrt_work_lock();
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work = (struct work_s *)wqueue->q.head;
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while (work) {
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/* Is this work ready? It is ready if there is no delay or if
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* the delay has elapsed. qtime is the time that the work was added
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* to the work queue. It will always be greater than or equal to
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* zero. Therefore a delay of zero will always execute immediately.
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*/
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elapsed = hrt_absolute_time() - work->qtime;
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//PX4_INFO("hrt work_process: in usec elapsed=%lu delay=%u work=%p", elapsed, work->delay, work);
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if (elapsed >= work->delay) {
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/* Remove the ready-to-execute work from the list */
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(void)dq_rem((struct dq_entry_s *) & (work->dq), &(wqueue->q));
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//PX4_INFO("Dequeued work=%p", work);
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/* Extract the work description from the entry (in case the work
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* instance by the re-used after it has been de-queued).
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*/
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worker = work->worker;
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arg = work->arg;
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/* Mark the work as no longer being queued */
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work->worker = NULL;
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/* Do the work. Re-enable interrupts while the work is being
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* performed... we don't have any idea how long that will take!
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*/
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hrt_work_unlock();
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if (!worker) {
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PX4_ERR("MESSED UP: worker = 0");
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} else {
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worker(arg);
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}
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/* Now, unfortunately, since we re-enabled interrupts we don't
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* know the state of the work list and we will have to start
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* back at the head of the list.
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*/
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hrt_work_lock();
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work = (struct work_s *)wqueue->q.head;
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} else {
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/* This one is not ready.. will it be ready before the next
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* scheduled wakeup interval?
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*/
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/* Here: elapsed < work->delay */
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remaining = work->delay - elapsed;
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//PX4_INFO("remaining=%u delay=%u elapsed=%lu", remaining, work->delay, elapsed);
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if (remaining < next) {
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/* Yes.. Then schedule to wake up when the work is ready */
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next = remaining;
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}
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/* Then try the next in the list. */
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work = (struct work_s *)work->dq.flink;
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//PX4_INFO("next %u work %p", next, work);
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}
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}
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/* Wait awhile to check the work list. We will wait here until either
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* the time elapses or until we are awakened by a signal.
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*/
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hrt_work_unlock();
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/* might sleep less if a signal received and new item was queued */
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//PX4_INFO("Sleeping for %u usec", next);
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px4_usleep(next);
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}
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/****************************************************************************
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* Name: work_hrtthread
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*
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* Description:
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* This is the worker threads that performs actions placed on the ISR work
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* list.
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*
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* work_hpthread and work_lpthread: These are the kernel mode work queues
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* (also build in the flat build). One of these threads also performs
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* periodic garbage collection (that is otherwise performed by the idle
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* thread if CONFIG_SCHED_WORKQUEUE is not defined).
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*
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* These worker threads are started by the OS during normal bringup.
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*
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* All of these entrypoints are referenced by OS internally and should not
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* not be accessed by application logic.
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*
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* Input parameters:
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* argc, argv (not used)
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*
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* Returned Value:
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* Does not return
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*
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****************************************************************************/
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static int work_hrtthread(int argc, char *argv[])
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{
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/* Loop forever */
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for (;;) {
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/* First, perform garbage collection. This cleans-up memory de-allocations
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* that were queued because they could not be freed in that execution
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* context (for example, if the memory was freed from an interrupt handler).
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* NOTE: If the work thread is disabled, this clean-up is performed by
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* the IDLE thread (at a very, very low priority).
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*/
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/* Then process queued work. We need to keep interrupts disabled while
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* we process items in the work list.
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*/
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hrt_work_process();
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}
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return PX4_OK; /* To keep some compilers happy */
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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void hrt_work_queue_init(void)
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{
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px4_sem_init(&_hrt_work_lock, 0, 1);
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memset(&g_hrt_work, 0, sizeof(g_hrt_work));
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// Create high priority worker thread
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g_hrt_work.pid = px4_task_spawn_cmd("wkr_hrt",
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SCHED_DEFAULT,
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SCHED_PRIORITY_MAX,
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2000,
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work_hrtthread,
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(char *const *)NULL);
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#ifdef __PX4_QURT
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signal(SIGALRM, _sighandler);
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#else
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signal(SIGCONT, _sighandler);
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#endif
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}
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