smi.c

nuclues plus 源代码程序

/*************************************************************************/
/*                                                                       */
/*        Copyright (c) 1993-1996 Accelerated Technology, Inc.           */
/*                                                                       */
/* PROPRIETARY RIGHTS of Accelerated Technology are involved in the      */
/* subject matter of this material.  All manufacturing, reproduction,    */
/* use, and sales rights pertaining to this subject matter are governed  */
/* by the license agreement.  The recipient of this software implicitly  */
/* accepts the terms of the license.                                     */
/*                                                                       */
/*************************************************************************/

/*************************************************************************/
/*                                                                       */
/* FILE NAME                                            VERSION          */
/*                                                                       */
/*      smi.c                                           PLUS  1.2        */
/*                                                                       */
/* COMPONENT                                                             */
/*                                                                       */
/*      SM - Semaphore Management                                        */
/*                                                                       */
/* DESCRIPTION                                                           */
/*                                                                       */
/*      This file contains the initialization routine for the semaphore  */
/*      management component.                                            */
/*                                                                       */
/* AUTHOR                                                                */
/*                                                                       */
/*      William E. Lamie, Accelerated Technology, Inc.                   */
/*                                                                       */
/* DATA STRUCTURES                                                       */
/*                                                                       */
/*      None                                                             */
/*                                                                       */
/* FUNCTIONS                                                             */
/*                                                                       */
/*      SMI_Initialize                      Semaphore Management Init.   */
/*                                                                       */
/* DEPENDENCIES                                                          */
/*                                                                       */
/*      sm_defs.h                           Semaphore component constants*/
/*                                                                       */
/* HISTORY                                                               */
/*                                                                       */
/*         NAME            DATE                    REMARKS               */
/*                                                                       */
/*      W. Lamie        03-01-1993      Created initial version 1.0      */
/*      D. Lamie        04-19-1993      Verified version 1.0             */
/*      W. Lamie        03-01-1994      Modified copyright, resulting in */
/*                                        version 1.1                    */
/*      R. Pfaff -                                                       */
/*      D. Lamie        03-18-1994      Verified version 1.1             */
/*      M.Q. Qian       04-17-1996      updated to version 1.2           */
/*                                                                       */
/*************************************************************************/
#define         NU_SOURCE_FILE


#include        "sm_defs.h"                 /* Semaphore constants       */


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

extern CS_NODE         *SMD_Created_Semaphores_List;
extern UNSIGNED         SMD_Total_Semaphores;
extern TC_PROTECT       SMD_List_Protect;


/*************************************************************************/
/*                                                                       */
/* FUNCTION                                                              */
/*                                                                       */
/*      SMI_Initialize                                                   */
/*                                                                       */
/* DESCRIPTION                                                           */
/*                                                                       */
/*      This function initializes the data structures that control the   */
/*      operation of the Semaphore component (SM).  There are no         */
/*      semaphores initially.                                            */
/*                                                                       */
/* AUTHOR                                                                */
/*                                                                       */
/*      William E. Lamie, Accelerated Technology, Inc.                   */
/*                                                                       */
/* CALLED BY                                                             */
/*                                                                       */
/*      INC_Initialize                      System initialization        */
/*                                                                       */
/* CALLS                                                                 */
/*                                                                       */
/*      None                                                             */
/*                                                                       */
/* INPUTS                                                                */
/*                                                                       */
/*      None                                                             */
/*                                                                       */
/* OUTPUTS                                                               */
/*                                                                       */
/*      SMD_Created_Semaphores_List         List of created semaphores   */
/*      SMD_Total_Semaphores                Number of created semaphores */
/*      SMD_List_Protect                    Protection for semaphore list*/
/*                                                                       */
/* HISTORY                                                               */
/*                                                                       */
/*         NAME            DATE                    REMARKS               */
/*                                                                       */
/*      W. Lamie        03-01-1993      Created initial version 1.0      */
/*      D. Lamie        04-19-1993      Verified version 1.0             */
/*                                                                       */
/*************************************************************************/
VOID  SMI_Initialize(VOID)
{

    /* Initialize the created semaphore list to NU_NULL.  */
    SMD_Created_Semaphores_List =  NU_NULL;
    
    /* Initialize the total number of created semaphores to 0.  */
    SMD_Total_Semaphores =  0;
    
    /* Initialize the list protection structure.  */
    SMD_List_Protect.tc_tcb_pointer =      NU_NULL;
}