scheduleredf.h

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/* SPDX-License-Identifier: BSD-2-Clause */

 
/*
 *  Copryight (c) 2011 Petr Benes.
 *  Copyright (C) 2011 On-Line Applications Research Corporation (OAR).
 *
 * 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.
 *
 * 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 _RTEMS_SCORE_SCHEDULEREDF_H
#define _RTEMS_SCORE_SCHEDULEREDF_H
 
#include <rtems/score/priority.h>
#include <rtems/score/scheduler.h>
#include <rtems/score/schedulerpriority.h>
#include <rtems/score/rbtree.h>
 
#include <limits.h>
 
#ifdef __cplusplus
extern "C" {
#endif

 
/*
 * Actually the EDF scheduler supports a maximum priority of
 * 0x7fffffffffffffff, but the user API is limited to uint32_t or int for
 * thread priorities.  Ignore ILP64 targets for now.
 */
#define SCHEDULER_EDF_MAXIMUM_PRIORITY INT_MAX

#define SCHEDULER_EDF_ENTRY_POINTS \
  { \
    _Scheduler_EDF_Initialize,       /* initialize entry point */ \
    _Scheduler_EDF_Schedule,         /* schedule entry point */ \
    _Scheduler_EDF_Yield,            /* yield entry point */ \
    _Scheduler_EDF_Block,            /* block entry point */ \
    _Scheduler_EDF_Unblock,          /* unblock entry point */ \
    _Scheduler_EDF_Update_priority,  /* update priority entry point */ \
    _Scheduler_EDF_Map_priority,     /* map priority entry point */ \
    _Scheduler_EDF_Unmap_priority,   /* unmap priority entry point */ \
    SCHEDULER_DEFAULT_SMP_OPERATIONS \
    _Scheduler_EDF_Node_initialize,  /* node initialize entry point */ \
    _Scheduler_default_Node_destroy, /* node destroy entry point */ \
    _Scheduler_EDF_Release_job,      /* new period of task */ \
    _Scheduler_EDF_Cancel_job,       /* cancel period of task */ \
    _Scheduler_default_Start_idle    /* start idle entry point */ \
    SCHEDULER_DEFAULT_SET_AFFINITY_OPERATION \
  }
 
typedef struct {
  Scheduler_Context Base;

  RBTree_Control Ready;
} Scheduler_EDF_Context;

typedef struct {
  Scheduler_Node Base;

  RBTree_Node Node;

  Priority_Control priority;
} Scheduler_EDF_Node;

void _Scheduler_EDF_Initialize( const Scheduler_Control *scheduler );

void _Scheduler_EDF_Block(
  const Scheduler_Control *scheduler,
  Thread_Control          *the_thread,
  Scheduler_Node          *node
);

void _Scheduler_EDF_Schedule(
  const Scheduler_Control *scheduler,
  Thread_Control          *the_thread
);

void _Scheduler_EDF_Node_initialize(
  const Scheduler_Control *scheduler,
  Scheduler_Node          *node,
  Thread_Control          *the_thread,
  Priority_Control         priority
);

void _Scheduler_EDF_Unblock(
  const Scheduler_Control *scheduler,
  Thread_Control          *the_thread,
  Scheduler_Node          *node
);

void _Scheduler_EDF_Update_priority(
  const Scheduler_Control *scheduler,
  Thread_Control          *the_thread,
  Scheduler_Node          *node
);

Priority_Control _Scheduler_EDF_Map_priority(
  const Scheduler_Control *scheduler,
  Priority_Control         priority
);

Priority_Control _Scheduler_EDF_Unmap_priority(
  const Scheduler_Control *scheduler,
  Priority_Control         priority
);

void _Scheduler_EDF_Yield(
  const Scheduler_Control *scheduler,
  Thread_Control          *the_thread,
  Scheduler_Node          *node
);

void _Scheduler_EDF_Release_job(
  const Scheduler_Control *scheduler,
  Thread_Control          *the_thread,
  Priority_Node           *priority_node,
  uint64_t                 deadline,
  Thread_queue_Context    *queue_context
);

void _Scheduler_EDF_Cancel_job(
  const Scheduler_Control *scheduler,
  Thread_Control          *the_thread,
  Priority_Node           *priority_node,
  Thread_queue_Context    *queue_context
);
 
#ifdef __cplusplus
}
#endif

 
#endif
/* end of include file */