px4-firmware/nuttx/sched/work_internal.h

115 lines
4.1 KiB
C

/****************************************************************************
* sched/work_internal.h
*
* Copyright (C) 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.
*
****************************************************************************/
#ifndef __SCHED_WORK_INTERNAL_H
#define __SCHED_WORK_INTERNAL_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <queue.h>
#ifdef CONFIG_SCHED_WORKQUEUE
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
#ifdef CONFIG_DISABLE_SIGNALS
# warning "Worker thread support requires signals"
#endif
#ifdef CONFIG_SCHED_LPWORK
# define NWORKERS 2
#else
# define NWORKERS 1
#endif
/****************************************************************************
* Public Types
****************************************************************************/
#ifndef __ASSEMBLY__
/* This structure defines the state on one work queue */
struct wqueue_s
{
pid_t pid; /* The task ID of the worker thread */
struct dq_queue_s q; /* The queue of pending work */
};
/****************************************************************************
* Public Data
****************************************************************************/
/* The state of each work queue */
extern struct wqueue_s g_work[NWORKERS];
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/****************************************************************************
* Name: work_hpthread and work_lpthread
*
* Description:
* These are the main worker threads that performs actions placed on the
* work lists. One thread also performs periodic garbage collection (that
* is performed by the idle thread if CONFIG_SCHED_WORKQUEUE is not defined).
*
* Input parameters:
* argc, argv (not used)
*
* Returned Value:
* Does not return
*
****************************************************************************/
int work_hpthread(int argc, char *argv[]);
#ifdef CONFIG_SCHED_LPWORK
int work_lpthread(int argc, char *argv[]);
#endif
#endif /* __ASSEMBLY__ */
#endif /* CONFIG_SCHED_WORKQUEUE */
#endif /* __SCHED_WORK_INTERNAL_H */