124 lines
4.8 KiB
C
124 lines
4.8 KiB
C
/****************************************************************************
|
|
* sched/wqueue/work_lpthread.c
|
|
*
|
|
* Copyright (C) 2009-2014 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 <nuttx/wqueue.h>
|
|
#include <nuttx/kmalloc.h>
|
|
|
|
#include "wqueue/wqueue.h"
|
|
|
|
#if defined(CONFIG_SCHED_WORKQUEUE) && defined(CONFIG_SCHED_LPWORK)
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Type Declarations
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Data
|
|
****************************************************************************/
|
|
|
|
/* The state of the kernel mode, low priority work queue(s). */
|
|
|
|
struct wqueue_s g_lpwork;
|
|
|
|
/****************************************************************************
|
|
* Private Data
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: work_lpthread
|
|
*
|
|
* Description:
|
|
* These are the worker thread(s) that performs the actions placed on the
|
|
* low priority work queue.
|
|
*
|
|
* These, along with the higher priority worker thread are the kernel mode
|
|
* work queues (also build in the flat build). One of these threads also
|
|
* performs periodic garbage collection (that would otherwise be performed
|
|
* by the idle thread if CONFIG_SCHED_WORKQUEUE is not defined). That will
|
|
* be the lower priority worker thread if it is available.
|
|
*
|
|
* All kernel mode worker threads are started by the OS during normal
|
|
* bring up. This entry point is referenced by OS internally and should
|
|
* not be accessed by application logic.
|
|
*
|
|
* Input parameters:
|
|
* argc, argv (not used)
|
|
*
|
|
* Returned Value:
|
|
* Does not return
|
|
*
|
|
****************************************************************************/
|
|
|
|
int work_lpthread(int argc, char *argv[])
|
|
{
|
|
/* Loop forever */
|
|
|
|
for (;;)
|
|
{
|
|
/* First, perform garbage collection. This cleans-up memory de-allocations
|
|
* that were queued because they could not be freed in that execution
|
|
* context (for example, if the memory was freed from an interrupt handler).
|
|
* NOTE: If the work thread is disabled, this clean-up is performed by
|
|
* the IDLE thread (at a very, very low priority).
|
|
*/
|
|
|
|
sched_garbagecollection();
|
|
|
|
/* Then process queued work. We need to keep interrupts disabled while
|
|
* we process items in the work list.
|
|
*/
|
|
|
|
work_process(&g_lpwork);
|
|
}
|
|
|
|
return OK; /* To keep some compilers happy */
|
|
}
|
|
|
|
#endif /* CONFIG_SCHED_WORKQUEUE && CONFIG_SCHED_LPWORK */
|