tcf.c
来自「nucleus 2006 source code」· C语言 代码 · 共 586 行 · 第 1/2 页
C
586 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 */
/* */
/* tcf.c Nucleus PLUS 1.15 */
/* */
/* COMPONENT */
/* */
/* TC - Thread Control */
/* */
/* DESCRIPTION */
/* */
/* This file contains information (fact) routines for the Thread */
/* Control component. */
/* */
/* DATA STRUCTURES */
/* */
/* None */
/* */
/* FUNCTIONS */
/* */
/* TCF_Established_Tasks Number of created tasks */
/* TCF_Established_HISRs Number of created HISRs */
/* TCF_Task_Pointers Build list of task pointers */
/* TCF_HISR_Pointers Build list of HISR pointers */
/* TCF_Task_Information Retrieve task information */
/* TCF_HISR_Information Retrieve HISR information */
/* */
/* DEPENDENCIES */
/* */
/* cs_extr.h Common Service functions */
/* tc_extr.h Thread Control functions */
/* in_extr.h Initialization/Interrupt */
/* functions */
/* tm_extr.h Timer Control function */
/* er_extr.h Error handling function */
/* hi_extr.h History functions */
/* */
/*************************************************************************/
#define NU_SOURCE_FILE
#include "plus/inc/cs_extr.h" /* Common service functions */
#include "plus/inc/tc_extr.h" /* Thread control functions */
#include "plus/inc/in_extr.h" /* Initialization/Interrupt */
/* functions */
#include "plus/inc/tm_extr.h" /* Timer control functions */
#include "plus/inc/er_extr.h" /* Error handling function */
#include "plus/inc/hi_extr.h" /* History functions */
/* Define external inner-component global data references. */
extern CS_NODE *TCD_Created_Tasks_List;
extern UNSIGNED TCD_Total_Tasks;
extern TC_TCB *TCD_Priority_List[TC_PRIORITIES];
extern UNSIGNED TCD_Priority_Groups;
extern DATA_ELEMENT TCD_Sub_Priority_Groups[TC_MAX_GROUPS];
extern UNSIGNED_CHAR TCD_Lowest_Set_Bit[];
extern INT TCD_Highest_Priority;
extern TC_TCB *TCD_Execute_Task;
extern VOID *TCD_Current_Thread;
extern UNSIGNED_CHAR TCD_Registered_LISRs[NU_MAX_VECTORS+1];
extern VOID (*TCD_LISR_Pointers[NU_MAX_LISRS+1])(INT vector);
extern INT TCD_Interrupt_Count;
extern INT TCD_Stack_Switched;
extern TC_PROTECT TCD_List_Protect;
extern TC_PROTECT TCD_Schedule_Protect;
extern TC_PROTECT TCD_LISR_Protect;
extern CS_NODE *TCD_Created_HISRs_List;
extern UNSIGNED TCD_Total_HISRs;
extern TC_PROTECT TCD_HISR_Protect;
extern INT TCD_Unhandled_Interrupt;
/* Define external inner-component function calls that are not available to
other components. */
VOID TCT_Build_Task_Stack(TC_TCB *task_ptr);
VOID TCT_Build_HISR_Stack(TC_HCB *hisr_ptr);
VOID TCT_Build_Signal_Frame(TC_TCB *task_ptr);
VOID TCT_Protect_Switch(TC_TCB *task);
VOID TCT_Signal_Exit(VOID);
/*************************************************************************/
/* */
/* FUNCTION */
/* */
/* TCF_Established_Tasks */
/* */
/* DESCRIPTION */
/* */
/* This function returns the current number of established tasks. */
/* Tasks previously deleted are no longer considered established. */
/* */
/* CALLED BY */
/* */
/* Application */
/* */
/* CALLS */
/* */
/* [TCT_Check_Stack] Stack checking function */
/* */
/* INPUTS */
/* */
/* None */
/* */
/* OUTPUTS */
/* */
/* TCD_Total_Tasks Number of established tasks */
/* */
/*************************************************************************/
UNSIGNED TCF_Established_Tasks(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 tasks. */
return(TCD_Total_Tasks);
}
/*************************************************************************/
/* */
/* FUNCTION */
/* */
/* TCF_Established_HISRs */
/* */
/* DESCRIPTION */
/* */
/* This function returns the current number of established HISRs. */
/* HISRs previously deleted are no longer considered established. */
/* */
/* CALLED BY */
/* */
/* Application */
/* */
/* CALLS */
/* */
/* [TCT_Check_Stack] Stack checking function */
/* */
/* INPUTS */
/* */
/* None */
/* */
/* OUTPUTS */
/* */
/* TCD_Total_HISRs Number of established HISRs */
/* */
/*************************************************************************/
UNSIGNED TCF_Established_HISRs(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 HISRs. */
return(TCD_Total_HISRs);
}
/*************************************************************************/
/* */
/* FUNCTION */
/* */
/* TCF_Task_Pointers */
/* */
/* DESCRIPTION */
/* */
/* This function builds a list of task pointers, starting at the */
/* specified location. The number of task pointers placed in the */
/* list is equivalent to the total number of tasks or the maximum */
/* number of pointers specified in the call. */
/* */
/* CALLED BY */
/* */
/* Application */
/* */
/* CALLS */
/* */
/* [TCT_Check_Stack] Stack checking function */
/* TCT_System_Protect Protect task created list */
/* TCT_Unprotect Release protection of list */
/* */
/* INPUTS */
/* */
/* pointer_list Pointer to the list area */
/* maximum_pointers Maximum number of pointers */
/* */
/* OUTPUTS */
/* */
/* pointers Number of tasks placed in */
/* list */
/*************************************************************************/
UNSIGNED TCF_Task_Pointers(NU_TASK **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 the task created list. */
TCT_Protect(&TCD_List_Protect);
/* Loop until all task pointers are in the list or until the maximum
list size is reached. */
node_ptr = TCD_Created_Tasks_List;
while ((node_ptr) && (pointers < maximum_pointers))
{
/* Place the node into the destination list. */
*pointer_list++ = (NU_TASK *) 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 == TCD_Created_Tasks_List)
/* The list search is complete. */
node_ptr = NU_NULL;
}
/* Release protection. */
TCT_Unprotect();
/* Return to user mode */
NU_USER_MODE();
/* Return the number of pointers in the list. */
return(pointers);
}
/*************************************************************************/
/* */
/* FUNCTION */
/* */
/* TCF_HISR_Pointers */
/* */
/* DESCRIPTION */
/* */
/* This function builds a list of HISR pointers, starting at the */
/* specified location. The number of HISR pointers placed in the */
/* list is equivalent to the total number of HISRs or the maximum */
/* number of pointers specified in the call. */
/* */
/* CALLED BY */
/* */
/* Application */
/* */
/* CALLS */
/* */
⌨️ 快捷键说明
复制代码Ctrl + C
搜索代码Ctrl + F
全屏模式F11
增大字号Ctrl + =
减小字号Ctrl + -
显示快捷键?