os_core/os_time.c File Reference

Go to the source code of this file.

Functions
void	OsTimeInit (void)
void	OsTimeTickHandler (void)
void	OsTimeDelayTaskPut (OS_TCB *pOsTcb)
void	OsTimeDelay (INT16U Ticks)
void	OsTimeEventListPut (OS_EVENT *pOsEvent)
INT8U	OsTimeEventListDelete (OS_EVENT *pOsEvent)
Variables
OS_EVENT *	OsTimeEventList
OS_TCB *	OsTimeDelayList
OS_TIME_CONTROL	OsTimeCtrl

---

Function Documentation

void OsTimeDelay

(

INT16U

Ticks

)

Definition at line 121 of file os_time.c.

                              {
    OS_TCB *pOsTcb;
    
    #if(OS_TIME_EVENT_ENABLE==0)
        return;
    #endif      
    OS_ENTER_CRITICAL();
    if(Ticks==0){
        OS_EXIT_CRITICAL();
        return;    
    }     
    pOsTcb=(OS_TCB *)OSTCBCur;
    pOsTcb->Status=OS_TASK_PENDING;
    pOsTcb->PendingType=OS_PENDING_TIME;
    pOsTcb->TimeDelay=Ticks;         
    OsTimeDelayTaskPut(pOsTcb);    
    OsSchedulerRunNext();  
    OS_EXIT_CRITICAL();
}

void OsTimeDelayTaskPut

(

OS_TCB *

pOsTcb

)

Definition at line 107 of file os_time.c.

                                       {
    pOsTcb->Next=(OS_TCB *)0;
    pOsTcb->Prev=(OS_TCB *)0;
    if(OsTimeCtrl.EntryNumber==0){        
        OsTimeDelayList=pOsTcb;
        OsTimeCtrl.EntryNumber=1;
    }
    else{
        pOsTcb->Next=OsTimeDelayList;
        OsTimeDelayList->Prev=pOsTcb;
        OsTimeDelayList=pOsTcb;
        OsTimeCtrl.EntryNumber++;
    }
}

INT8U OsTimeEventListDelete

(

OS_EVENT *

pOsEvent

)

Definition at line 154 of file os_time.c.

                                               {
    OS_EVENT *pEvent;

    if(OsTimeEventList==(OS_EVENT *)0) return FALSE;
    pEvent=OsTimeEventList;
    while(pEvent!=(OS_EVENT *)0){        
        if(pOsEvent==pEvent){ // find event in list
            if(pEvent==OsTimeEventList){ // at list head
                if(OsTimeEventList->Next==(OS_EVENT *)0){
                    OsTimeEventList=(OS_EVENT *)0;                    
                }
                else{
                    OsTimeEventList=OsTimeEventList->Next;
                    OsTimeEventList->Prev=(OS_EVENT *)0;               
                }    
            }
            else if(pEvent->Next==(OS_EVENT *)0){ // at list tail
                pEvent->Prev->Next=(OS_EVENT *)0;                        
            }
            else{ // at list middle
                pEvent->Prev->Next=pEvent->Next;
                pEvent->Next->Prev=pEvent->Prev;                      
            }
            OsTimeCtrl.EventListNumber--;
            //OsEventFreeEventPut(pOsEvent); // no do it here 
            return TRUE;
        }  
        else pEvent=pEvent->Next;
    }    
    return FALSE;
}

void OsTimeEventListPut

(

OS_EVENT *

pOsEvent

)

Definition at line 140 of file os_time.c.

                                           {
    pOsEvent->Next=(OS_EVENT *)0; // clear linking relation 
    pOsEvent->Prev=(OS_EVENT *)0; // clear linking relation
    if(OsTimeEventList==(OS_EVENT *)0){        
        OsTimeEventList=pOsEvent;
        OsTimeCtrl.EventListNumber=1;
    }
    else{
        pOsEvent->Next=OsTimeEventList;
        OsTimeEventList->Prev=pOsEvent;
        OsTimeEventList=pOsEvent;
        OsTimeCtrl.EventListNumber++;
    }
}

void OsTimeInit

(

void

)

Definition at line 25 of file os_time.c.

                     {
    OsTimeDelayList=(OS_TCB *)0;
    OsTimeEventList=(OS_EVENT *)0;
    OsTimeCtrl.EntryNumber=0;    
    OsTimeCtrl.EventListNumber=0;    
    OsTimeCtrl.Time=0;
}

void OsTimeTickHandler

(

void

)

Definition at line 32 of file os_time.c.

                            {
    OS_TCB *pTcb,*pTcb2,*pTaskListHead;
    OS_EVENT *pEvent;
    
    OsTimeCtrl.Time++;
    if(OsTimeDelayList==(OS_TCB *)0) return;
    pTcb=OsTimeDelayList;
    while(pTcb!=(OS_TCB *)0){  // scan time delay task list       
        if(pTcb->TimeDelay!=0) pTcb->TimeDelay--;
        if(pTcb->TimeDelay==0){
            pTcb2=pTcb;
            if(pTcb2==OsTimeDelayList){
                if(OsTimeDelayList->Next==(OS_TCB *)0){
                    OsTimeDelayList=(OS_TCB *)0;
                    pTcb=(OS_TCB *)0; // no next task
                }
                else{
                    OsTimeDelayList=OsTimeDelayList->Next;
                    OsTimeDelayList->Prev=(OS_TCB *)0; 
                    pTcb=OsTimeDelayList; // next task is list head              
                }    
            }
            else if(pTcb2->Next==(OS_TCB *)0){
                pTcb2->Prev->Next=(OS_TCB *)0; 
                pTcb=(OS_TCB *)0; // no next task                         
            } 
            else{
                pTcb2->Prev->Next=pTcb2->Next;
                pTcb2->Next->Prev=pTcb2->Prev; 
                pTcb=pTcb2->Next;  // next task is next task                    
            }
            OsTimeCtrl.EntryNumber--;
            OsTaskReadyTaskPut(pTcb2); // task time out..become ready task again  
        }  
        else pTcb=pTcb->Next;
    }
    return;
    // scan event list to see if any pending task time out  
    pEvent=OsTimeEventList;  
    while(pEvent!=(OS_EVENT *)0){
        pTaskListHead=(OS_TCB *)pEvent->ListHead;
        pTcb=pTaskListHead;
        while(pTcb!=(OS_TCB *)0){
            if(pTcb->TimeDelay!=0) pTcb->TimeDelay--;
            if(pTcb->TimeDelay==0){
                pTcb2=pTcb;
                if(pTcb2==pTaskListHead){
                    if(pTaskListHead->Next==(OS_TCB *)0){
                        pEvent->ListHead=(INT32U *)0;
                        pTcb=(OS_TCB *)0; // no next task
                    }
                    else{
                        pEvent->ListHead=(INT32U *)pTaskListHead->Next;
                        pTaskListHead=pTaskListHead->Next;
                        pTaskListHead->Prev=(OS_TCB *)0; 
                        pTcb=pTaskListHead; // point to next TCB                     
                    }                
                }            
                else if(pTcb2->Next==(OS_TCB *)0){
                    pTcb2->Prev->Next=(OS_TCB *)0; 
                    pTcb=(OS_TCB *)0; // no next task                                        
                }
                else{
                    pTcb2->Prev->Next=pTcb2->Next;
                    pTcb2->Next->Prev=pTcb2->Prev; 
                    pTcb=pTcb2->Next;  // point to next TCB                                         
                }                
                pEvent->EntryNumber--;
                OsTaskReadyTaskPut(pTcb2); // task time out..become ready task again
            }
            else pTcb=pTcb->Next;     // point to next TCB  
        } 
        pEvent=pEvent->Next;   
    }
}

---

Variable Documentation

OS_TIME_CONTROL OsTimeCtrl

Definition at line 16 of file os_time.c.

OS_TCB* OsTimeDelayList

Definition at line 15 of file os_time.c.

OS_EVENT* OsTimeEventList

Definition at line 14 of file os_time.c.