coremsg.h

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/*
 *  COPYRIGHT (c) 1989-2009.
 *  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_COREMSG_H
#define _RTEMS_SCORE_COREMSG_H

#include <rtems/score/chain.h>
#include <rtems/score/isrlock.h>
#include <rtems/score/threadq.h>
#include <rtems/score/watchdog.h>

#ifdef __cplusplus
extern "C" {
#endif

#define RTEMS_SCORE_COREMSG_ENABLE_MESSAGE_PRIORITY

#if defined(RTEMS_POSIX_API)

  #define RTEMS_SCORE_COREMSG_ENABLE_NOTIFICATION
#endif

#define RTEMS_SCORE_COREMSG_ENABLE_BLOCKING_SEND

typedef struct CORE_message_queue_Control CORE_message_queue_Control;

typedef struct {
  size_t      size;
  uint32_t    buffer[1];
} CORE_message_queue_Buffer;

typedef struct {
  Chain_Node                 Node;
  #if defined(RTEMS_SCORE_COREMSG_ENABLE_MESSAGE_PRIORITY)

    int                        priority;
  #endif

  CORE_message_queue_Buffer  Contents;
}   CORE_message_queue_Buffer_control;

typedef enum {
  CORE_MESSAGE_QUEUE_DISCIPLINES_FIFO,
  CORE_MESSAGE_QUEUE_DISCIPLINES_PRIORITY
}   CORE_message_queue_Disciplines;

#if defined(RTEMS_SCORE_COREMSG_ENABLE_NOTIFICATION)

  typedef void (*CORE_message_queue_Notify_Handler)(
    CORE_message_queue_Control *,
    Thread_queue_Context *
  );
#endif

struct CORE_message_queue_Control {
  Thread_queue_Control               Wait_queue;

  const Thread_queue_Operations     *operations;

  uint32_t                           maximum_pending_messages;
  uint32_t                           number_of_pending_messages;
  size_t                             maximum_message_size;
  Chain_Control                      Pending_messages;
  CORE_message_queue_Buffer         *message_buffers;
  #if defined(RTEMS_SCORE_COREMSG_ENABLE_NOTIFICATION)

    CORE_message_queue_Notify_Handler  notify_handler;
  #endif

  Chain_Control                      Inactive_messages;
};

#ifdef __cplusplus
}
#endif

#endif
/*  end of include file */