mbi.c

来自「nucleus 2006 source code」· C语言 代码 · 共 103 行

/*************************************************************************/
/*                                                                       */
/*               Copyright Mentor Graphics Corporation 2004              */
/*                         All Rights Reserved.                          */
/*                                                                       */
/* THIS WORK CONTAINS TRADE SECRET AND PROPRIETARY INFORMATION WHICH IS  */
/* THE PROPERTY OF MENTOR GRAPHICS CORPORATION OR ITS LICENSORS AND IS   */
/* SUBJECT TO LICENSE TERMS.                                             */
/*                                                                       */
/*************************************************************************/

/*************************************************************************/
/*                                                                       */
/* FILE NAME                                               VERSION       */
/*                                                                       */
/*      mbi.c                                          Nucleus PLUS 1.15 */
/*                                                                       */
/* COMPONENT                                                             */
/*                                                                       */
/*      MB - Mailbox Management                                          */
/*                                                                       */
/* DESCRIPTION                                                           */
/*                                                                       */
/*      This file contains the initialization routine for the mailbox    */
/*      management component.                                            */
/*                                                                       */
/* DATA STRUCTURES                                                       */
/*                                                                       */
/*      None                                                             */
/*                                                                       */
/* FUNCTIONS                                                             */
/*                                                                       */
/*      MBI_Initialize                      Mailbox Management Initialize*/
/*                                                                       */
/* DEPENDENCIES                                                          */
/*                                                                       */
/*      mb_defs.h                           Mailbox component constants  */
/*                                                                       */
/*************************************************************************/
#define         NU_SOURCE_FILE


#include        "plus/inc/mb_defs.h"        /* Mailbox constants         */
#include        "plus/inc/mb_extr.h"        /* Mailbox interfaces        */


/* Define external inner-component global data references.  */

extern CS_NODE         *MBD_Created_Mailboxes_List;
extern UNSIGNED         MBD_Total_Mailboxes;
extern TC_PROTECT       MBD_List_Protect;


/*************************************************************************/
/*                                                                       */
/* FUNCTION                                                              */
/*                                                                       */
/*      MBI_Initialize                                                   */
/*                                                                       */
/* DESCRIPTION                                                           */
/*                                                                       */
/*      This function initializes the data structures that control the   */
/*      operation of the Mailbox component (MB).  There are no mailboxes */
/*      initially.  This routine must be called from Supervisor mode in  */
/*      Supervisor/User mode switched kernels.                           */
/*                                                                       */
/* CALLED BY                                                             */
/*                                                                       */
/*      INC_Initialize                      System initialization        */
/*                                                                       */
/* CALLS                                                                 */
/*                                                                       */
/*      None                                                             */
/*                                                                       */
/* INPUTS                                                                */
/*                                                                       */
/*      None                                                             */
/*                                                                       */
/* OUTPUTS                                                               */
/*                                                                       */
/*      MBD_Created_Mailboxes_List          List of created mailboxes    */
/*      MBD_Total_Mailboxes                 Number of created mailboxes  */
/*      MBD_List_Protect                    Protection for mailbox list  */
/*                                                                       */
/*************************************************************************/
VOID  MBI_Initialize(VOID)
{
    /* Initialize the created mailbox list to NU_NULL.  */
    MBD_Created_Mailboxes_List =  NU_NULL;

    /* Initialize the total number of created mailboxes to 0.  */
    MBD_Total_Mailboxes =  0;

    /* Initialize the list protection structure.  */
    MBD_List_Protect.tc_tcb_pointer =      NU_NULL;
}