schedulercbs.h

Go to the documentation of this file.

/*
 *  Copryight (c) 2011 Petr Benes.
 *  Copyright (C) 2011 On-Line Applications Research Corporation (OAR).
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.rtems.org/license/LICENSE.
 */

#ifndef _RTEMS_SCORE_SCHEDULERCBS_H
#define _RTEMS_SCORE_SCHEDULERCBS_H

#include <rtems/score/chain.h>
#include <rtems/score/priority.h>
#include <rtems/score/scheduler.h>
#include <rtems/score/rbtree.h>
#include <rtems/score/scheduleredf.h>
#include <rtems/rtems/signal.h>
#include <rtems/rtems/timer.h>
#include <rtems/score/thread.h>

#ifdef __cplusplus
extern "C" {
#endif

#define SCHEDULER_CBS_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_CBS_Unblock,          /* unblock entry point */ \
    _Scheduler_EDF_Change_priority,  /* change priority entry point */ \
    SCHEDULER_OPERATION_DEFAULT_ASK_FOR_HELP \
    _Scheduler_CBS_Node_initialize,  /* node initialize entry point */ \
    _Scheduler_default_Node_destroy, /* node destroy entry point */ \
    _Scheduler_EDF_Update_priority,  /* update priority entry point */ \
    _Scheduler_EDF_Priority_compare, /* compares two priorities */ \
    _Scheduler_CBS_Release_job,      /* new period of task */ \
    _Scheduler_default_Tick,         /* tick entry point */ \
    _Scheduler_default_Start_idle    /* start idle entry point */ \
    SCHEDULER_OPERATION_DEFAULT_GET_SET_AFFINITY \
  }

/* Return values for CBS server. */
#define SCHEDULER_CBS_OK                        0
#define SCHEDULER_CBS_ERROR_GENERIC            -16
#define SCHEDULER_CBS_ERROR_NO_MEMORY          -17
#define SCHEDULER_CBS_ERROR_INVALID_PARAMETER  -18
#define SCHEDULER_CBS_ERROR_UNAUTHORIZED       -19
#define SCHEDULER_CBS_ERROR_UNIMPLEMENTED      -20
#define SCHEDULER_CBS_ERROR_MISSING_COMPONENT  -21
#define SCHEDULER_CBS_ERROR_INCONSISTENT_STATE -22
#define SCHEDULER_CBS_ERROR_SYSTEM_OVERLOAD    -23
#define SCHEDULER_CBS_ERROR_INTERNAL_ERROR     -24
#define SCHEDULER_CBS_ERROR_NOT_FOUND          -25
#define SCHEDULER_CBS_ERROR_FULL               -26
#define SCHEDULER_CBS_ERROR_EMPTY              -27
#define SCHEDULER_CBS_ERROR_NOSERVER           SCHEDULER_CBS_ERROR_NOT_FOUND

extern const uint32_t _Scheduler_CBS_Maximum_servers;

typedef uint32_t Scheduler_CBS_Server_id;

typedef void (*Scheduler_CBS_Budget_overrun)(
    Scheduler_CBS_Server_id server_id
);

typedef struct {
  time_t deadline;
  time_t budget;
} Scheduler_CBS_Parameters;

typedef struct {
  rtems_id                 task_id;
  Scheduler_CBS_Parameters parameters;
  Scheduler_CBS_Budget_overrun  cbs_budget_overrun;

  bool initialized;
} Scheduler_CBS_Server;

typedef struct {
  Scheduler_EDF_Node            Base;
  Scheduler_CBS_Server         *cbs_server;
} Scheduler_CBS_Node;


extern Scheduler_CBS_Server _Scheduler_CBS_Server_list[];

Scheduler_Void_or_thread _Scheduler_CBS_Unblock(
  const Scheduler_Control *scheduler,
  Thread_Control          *the_thread
);

void _Scheduler_CBS_Release_job (
  const Scheduler_Control *scheduler,
  Thread_Control          *the_thread,
  uint32_t                 length
);

int _Scheduler_CBS_Initialize(void);

int _Scheduler_CBS_Attach_thread (
  Scheduler_CBS_Server_id server_id,
  rtems_id                task_id
);

int _Scheduler_CBS_Detach_thread (
  Scheduler_CBS_Server_id server_id,
  rtems_id                task_id
);

int _Scheduler_CBS_Cleanup (void);

int _Scheduler_CBS_Create_server (
  Scheduler_CBS_Parameters     *params,
  Scheduler_CBS_Budget_overrun  budget_overrun_callback,
  rtems_id                     *server_id
);

int _Scheduler_CBS_Destroy_server (
  Scheduler_CBS_Server_id server_id
);

int _Scheduler_CBS_Get_approved_budget (
  Scheduler_CBS_Server_id  server_id,
  time_t                  *approved_budget
);

int _Scheduler_CBS_Get_remaining_budget (
  Scheduler_CBS_Server_id  server_id,
  time_t                  *remaining_budget
);

int _Scheduler_CBS_Get_execution_time (
  Scheduler_CBS_Server_id   server_id,
  time_t                   *exec_time,
  time_t                   *abs_time
);

int _Scheduler_CBS_Get_parameters (
  Scheduler_CBS_Server_id   server_id,
  Scheduler_CBS_Parameters *params
);

int _Scheduler_CBS_Get_server_id (
  rtems_id                 task_id,
  Scheduler_CBS_Server_id *server_id
);

int _Scheduler_CBS_Set_parameters (
  Scheduler_CBS_Server_id   server_id,
  Scheduler_CBS_Parameters *parameters
);

void _Scheduler_CBS_Budget_callout(
  Thread_Control *the_thread
);

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

#ifdef __cplusplus
}
#endif

#endif
/* end of include file */