px4-firmware/nuttx/sched/work_internal.h

/****************************************************************************
 * 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 */