?? tmf.c
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/*************************************************************************/
/* */
/* Copyright Mentor Graphics Corporation 2002 */
/* 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 */
/* */
/* tmf.c Nucleus PLUS 1.14 */
/* */
/* COMPONENT */
/* */
/* TM - Timer Management */
/* */
/* DESCRIPTION */
/* */
/* This file contains information (fact) routines for the Timer */
/* Management component. */
/* */
/* DATA STRUCTURES */
/* */
/* None */
/* */
/* FUNCTIONS */
/* */
/* TMF_Established_Timers Number of established timers */
/* TMF_Timer_Pointers Return list of application */
/* timer pointers */
/* TMF_Timer_Information Return information about the */
/* application timer */
/* */
/* TMF_Get_Remaining_Time Return remaining timer until */
/* a timer expires */
/* */
/* DEPENDENCIES */
/* */
/* cs_extr.h Common Service functions */
/* tc_extr.h Thread Control functions */
/* tm_extr.h Timer functions */
/* hi_extr.h History functions */
/* */
/* HISTORY */
/* */
/* DATE REMARKS */
/* */
/* 03-01-1994 Created initial version 1.1 from */
/* previous version of TMC.C */
/* */
/* 03-18-1994 Verified version 1.1 */
/* 04-17-1996 updated to version 1.2 */
/* 11-18-1996 Protected Informational service */
/* from NULL Control Block pointers */
/* creating 1.2a. (SPR220) */
/* 03-24-1998 Released version 1.3 */
/* 03-26-1999 Released 1.11m (new release */
/* numbering scheme) */
/* 04-17-2002 Released version 1.13m */
/* 11-07-2002 Released version 1.14 */
/*************************************************************************/
#define NU_SOURCE_FILE
#include "cs_extr.h" /* Common service functions */
#include "tc_extr.h" /* Thread control functions */
#include "tm_extr.h" /* Timer functions */
#include "hi_extr.h" /* History functions */
/* Define external inner-component global data references. */
extern CS_NODE *TMD_Created_Timers_List;
extern UNSIGNED TMD_Total_Timers;
extern TM_TCB *TMD_Active_Timers_List;
extern INT TMD_Active_List_Busy;
extern TC_PROTECT TMD_Created_List_Protect;
/*************************************************************************/
/* */
/* FUNCTION */
/* */
/* TMF_Established_Timers */
/* */
/* DESCRIPTION */
/* */
/* This function returns the current number of established */
/* timers. Timers previously deleted are no longer considered */
/* established. */
/* */
/* CALLED BY */
/* */
/* Application */
/* */
/* CALLS */
/* */
/* [TCT_Check_Stack] Stack checking function */
/* */
/* INPUTS */
/* */
/* None */
/* */
/* OUTPUTS */
/* */
/* TMD_Total_Timers Number of established */
/* timers */
/* */
/* HISTORY */
/* */
/* DATE REMARKS */
/* */
/* 03-01-1993 Created initial version 1.0 */
/* 04-19-1993 Verified version 1.0 */
/* 03-01-1994 Changed function interface, */
/* resulting in version 1.1 */
/* */
/* 03-18-1994 Verified version 1.1 */
/* */
/*************************************************************************/
UNSIGNED TMF_Established_Timers(VOID)
{
#ifdef NU_ENABLE_STACK_CHECK
/* Call stack checking function to check for an overflow condition. */
TCT_Check_Stack();
#endif
/* Return the number of established timers. */
return(TMD_Total_Timers);
}
/*************************************************************************/
/* */
/* FUNCTION */
/* */
/* TMF_Timer_Pointers */
/* */
/* DESCRIPTION */
/* */
/* This function builds a list of timer pointers, starting at the */
/* specified location. The number of timer pointers placed in */
/* the list is equivalent to the total number of timers or the */
/* maximum number of pointers specified in the call. */
/* */
/* CALLED BY */
/* */
/* Application */
/* */
/* CALLS */
/* */
/* [TCT_Check_Stack] Stack checking function */
/* TCT_Protect Protect created list */
/* TCT_Unprotect Release protection */
/* */
/* INPUTS */
/* */
/* pointer_list Pointer to the list area */
/* maximum_pointers Maximum number of pointers */
/* */
/* OUTPUTS */
/* */
/* pointers Number of timers placed */
/* in the list */
/* HISTORY */
/* */
/* DATE REMARKS */
/* */
/* 03-01-1993 Created initial version 1.0 */
/* 04-19-1993 Verified version 1.0 */
/* 08-09-1993 Corrected problem in pointer */
/* retrieval loop, resulting in */
/* version 1.0a */
/* 08-09-1993 Verified version 1.0a */
/* 03-01-1994 Changed function interface, */
/* resulting in version 1.1 */
/* */
/* 03-18-1994 Verified version 1.1 */
/* */
/*************************************************************************/
UNSIGNED TMF_Timer_Pointers(NU_TIMER **pointer_list,
UNSIGNED maximum_pointers)
{
CS_NODE *node_ptr; /* Pointer to each TCB */
UNSIGNED pointers; /* Number of pointers in list*/
NU_SUPERV_USER_VARIABLES
/* Switch to supervisor mode */
NU_SUPERVISOR_MODE();
#ifdef NU_ENABLE_STACK_CHECK
/* Call stack checking function to check for an overflow condition. */
TCT_Check_Stack();
#endif
/* Initialize the number of pointers returned. */
pointers = 0;
/* Protect against access to the list of created timers. */
TCT_Protect(&TMD_Created_List_Protect);
/* Loop until all timer pointers are in the list or until the maximum
list size is reached. */
node_ptr = TMD_Created_Timers_List;
while ((node_ptr) && (pointers < maximum_pointers))
{
/* Place the node into the destination list. */
*pointer_list++ = (NU_TIMER *) node_ptr;
/* Increment the pointers variable. */
pointers++;
/* Position the node pointer to the next node. */
node_ptr = node_ptr -> cs_next;
/* Determine if the pointer is at the head of the list. */
if (node_ptr == TMD_Created_Timers_List)
/* The list search is complete. */
node_ptr = NU_NULL;
}
/* Release protection against access to the list of created timers. */
TCT_Unprotect();
/* Return to user mode */
NU_USER_MODE();
/* Return the number of pointers in the list. */
return(pointers);
}
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