C++ OsSchedUnlock函数代码示例

/**
 *******************************************************************************
 * @brief      Get a memory buffer from memory partition	    
 * @param[in]  mmID     Specify	memory partition that want to assign buffer.	
 * @param[out] None
 * @retval     NULL     Assign buffer fail.
 * @retval     others   Assign buffer successful,and return the buffer pointer.	
 *		 
 * @par Description
 * @details    This function is called to Delete a memory partition.
 *******************************************************************************
 */
void* CoGetMemoryBuffer(OS_MMID mmID)
{
    P_MM      memCtl;
    P_MemBlk  memBlk;
#if CFG_PAR_CHECKOUT_EN >0              /* Check validity of parameter        */
    if(mmID >= CFG_MAX_MM)
    {
        return NULL;
    }
    if( ((1<<mmID)&MemoryIDVessel)  == 0)
    {
        return NULL;
    }
#endif
    memCtl = &MemoryTbl[mmID];	
    OsSchedLock();                      /* Lock schedule                      */	        
    if(memCtl->freeBlock == NULL )    /* Is there no free item in memory list */
    {
        OsSchedUnlock();                /* Unlock schedule                    */
        return NULL;                    /* Yes,error return                   */
    }
    memBlk = (P_MemBlk)memCtl->freeBlock;       /* Get free memory block      */
    memCtl->freeBlock = (U8*)memBlk->nextBlock; /* Reset the first free item  */
    OsSchedUnlock();                    /* Unlock schedule                    */
    return memBlk;                      /* Return free memory block address   */
}

/**
 *******************************************************************************
 * @brief      Accept a semaphore without waitting 	  
 * @param[in]  id      Event ID   	 
 * @param[out] None  
 * @retval     E_INVALID_ID    Invalid event ID.
 * @retval     E_SEM_EMPTY     No semaphore exist.
 * @retval     E_OK            Get semaphore successful. 	
 *
 * @par Description
 * @details    This function is called accept a semaphore without waitting. 
 *******************************************************************************
 */
StatusType CoAcceptSem(OS_EventID id)
{
    P_ECB pecb;
#if CFG_PAR_CHECKOUT_EN >0
    if(id >= CFG_MAX_EVENT)	                 
    {
        return E_INVALID_ID;
    }
#endif

	pecb = &EventTbl[id];
#if CFG_PAR_CHECKOUT_EN >0
    if( pecb->eventType != EVENT_TYPE_SEM)   
    {
        return E_INVALID_ID;	
    }
#endif
	OsSchedLock();
    if(pecb->eventCounter > 0) /* If semaphore is positive,resource available */
    {	
        pecb->eventCounter--;         /* Decrement semaphore only if positive */
		OsSchedUnlock();
        return E_OK;	
    }
    else                                /* Resource is not available          */
    {	
		OsSchedUnlock();
        return E_SEM_EMPTY;
    }	
}

/**
 *******************************************************************************
 * @brief      Delete a flag
 * @param[in]  id      Flag ID.
 * @param[in]  opt     Delete option.
 * @param[out] None
 * @retval     E_CALL            Error call in ISR.
 * @retval     E_INVALID_ID      Invalid event ID.
 * @retval     E_TASK_WAITTING   Tasks waitting for the event,delete fail.
 * @retval     E_OK              Event deleted successful.
 *
 * @par Description
 * @details    This function is called to delete a event flag.
 * @note
 *******************************************************************************
 */
StatusType CoDelFlag(OS_FlagID id,U8 opt)
{
    P_FLAG_NODE pnode;
    P_FCB pfcb;
    pfcb  = &FlagCrl;
    if(OSIntNesting > 0)                /* If be called from ISR              */
    {
        return E_CALL;
    }
#if CFG_PAR_CHECKOUT_EN >0
    if((pfcb->flagActive&(1<<id)) == 0) /* Flag is valid or not               */
    {
        return E_INVALID_ID;
    }
#endif
    OsSchedLock();
    pnode = pfcb->headNode;

    while(pnode != Co_NULL)                /* Ready all tasks waiting for flags  */
    {
        if((pnode->waitFlags&(1<<id)) != 0) /* If no task is waiting on flags */
    	  {
            if(opt == OPT_DEL_NO_PEND)      /* Delete flag if no task waiting */
            {
              	OsSchedUnlock();
               	return E_TASK_WAITING;
            }
            else if (opt == OPT_DEL_ANYWAY) /* Always delete the flag         */
            {
                if(pnode->waitType == OPT_WAIT_ALL)
                {
                    /* If the flag is only required by NODE                   */
                    if( pnode->waitFlags == (1<<id) )
                    {
                        /* Remove the NODE from waiting list                  */
                        pnode = RemoveFromLink(pnode);
                        continue;
                    }
                    else
                    {
                        pnode->waitFlags &= ~(1<<id);   /* Update waitflags   */
                    }
                }
                else
                {
                    pnode = RemoveFromLink(pnode);
                    continue;
                }
            }
        }
        pnode = pnode->nextNode;
    }

    /* Remove the flag from the flags list */
    pfcb->flagActive &= ~(1<<id);
    pfcb->flagRdy    &= ~(1<<id);
    pfcb->resetOpt   &= ~(1<<id);
    OsSchedUnlock();
    return E_OK;
}

/**
 *******************************************************************************
 * @brief      Create a timer	   
 * @param[in]  tmrType     Specify timer's type.		 
 * @param[in]  tmrCnt      Specify timer initial counter value.  
 * @param[in]  tmrReload   Specify timer reload value.
 * @param[in]  func        Specify timer callback function entry.
 * @param[out] None
 * @retval     E_CREATE_FAIL   Create timer fail.
 * @retval     others          Create timer successful.			 
 *
 * @par Description
 * @details    This function is called to create a timer.
 *******************************************************************************
 */
OS_TCID CoCreateTmr(U8 tmrType, U32 tmrCnt, U32 tmrReload, vFUNCPtr func)
{
    U8 i;
#if CFG_PAR_CHECKOUT_EN >0              /* Check validity of parameter        */
    if((tmrType != TMR_TYPE_ONE_SHOT) && (tmrType != TMR_TYPE_PERIODIC))
    {
        return E_CREATE_FAIL;	
    }
    if(func == NULL)
    {
        return E_CREATE_FAIL;
    }
#endif
    OsSchedLock();                        /* Lock schedule                    */
    for(i = 0; i < CFG_MAX_TMR; i++)
    {
        if((TmrIDVessel & (1u << i)) == 0) /* Is free timer ID?                */
        {
            TmrIDVessel |= (1u<<i);        /* Yes,assign ID to this timer      */
            OsSchedUnlock();              /* Unlock schedule                  */
            TmrTbl[i].tmrID     = i;      /* Initialize timer as user set     */
            TmrTbl[i].tmrType   = tmrType;	
            TmrTbl[i].tmrState  = TMR_STATE_STOPPED;
            TmrTbl[i].tmrCnt    = tmrCnt;
            TmrTbl[i].tmrReload	= tmrReload;
            TmrTbl[i].tmrCallBack = func;
            TmrTbl[i].tmrPrev   = NULL;
            TmrTbl[i].tmrNext   = NULL;
            return i;                     /* Return timer ID                  */
        }
    }
    OsSchedUnlock();                      /* Unlock schedule                  */
    return E_CREATE_FAIL;                 /* Error return                     */
}

/**
 *******************************************************************************
 * @brief      Create a memory partition	 
 * @param[in]  memBuf       Specify memory partition head address.		 
 * @param[in]  blockSize    Specify memory block size.  
 * @param[in]  blockNum     Specify memory block number.
 * @param[out] None
 * @retval     E_CREATE_FAIL  Create memory partition fail.
 * @retval     others         Create memory partition successful.			 
 *
 * @par Description
 * @details    This function is called to create a memory partition.
 *******************************************************************************
 */
OS_MMID CoCreateMemPartition(U8* memBuf,U32 blockSize,U32 blockNum)
{
    U8        i,j;
    U8        *memory;
    P_MemBlk  memBlk;
    memory = memBuf;
	
#if CFG_PAR_CHECKOUT_EN >0              /* Check validity of parameter        */
    if(memBuf == NULL)
    {
        return 	E_CREATE_FAIL;
    }
    if(blockSize == 0)
    {
        return 	E_CREATE_FAIL;	
    }
    if((blockSize&0x3) != 0)
    {
        return 	E_CREATE_FAIL;	
    }
    if(blockNum<=1)
    {
        return 	E_CREATE_FAIL;
    }
#endif

    OsSchedLock();                      /* Lock schedule                      */
    for(i = 0; i < CFG_MAX_MM; i++)
    {
        if((MemoryIDVessel & (1 << i)) == 0)  /* Is free memory ID?           */
        {
            MemoryIDVessel |= (1<<i);   /* Yes,assign ID to this memory block */
            OsSchedUnlock();            /* Unlock schedule                    */
            MemoryTbl[i].memAddr   = memory;/* Initialize memory control block*/
            MemoryTbl[i].freeBlock = memory;  	
            MemoryTbl[i].blockSize = blockSize;
            MemoryTbl[i].blockNum  = blockNum;
            memBlk  = (P_MemBlk)memory;     /* Bulid list in this memory block*/ 
            for(j=0;j<blockNum-1;j++)
            {
                memory = memory+blockSize;
                memBlk->nextBlock = (P_MemBlk)memory;
                memBlk = memBlk->nextBlock;
            }
            memBlk->nextBlock = NULL;
            return i;                   /* Return memory block ID             */
        }
    }
    OsSchedUnlock();                    /* Unlock schedule                    */
    return E_CREATE_FAIL;               /* Error return                       */
}

/**
 *******************************************************************************
 * @brief      Post a mailbox	  
 * @param[in]  id      Event ID.
 * @param[in]  pmail   Pointer to mail that want to send.		 
 * @param[out] None   
 * @retval     E_INVALID_ID	
 * @retval     E_OK		 
 *
 * @par Description
 * @details    This function is called to post a mail. 
 * @note 
 *******************************************************************************
 */
StatusType CoPostMail(OS_EventID id,void* pmail)
{
    P_ECB pecb;
#if CFG_PAR_CHECKOUT_EN >0
    if(id >= CFG_MAX_EVENT)	                
    {
        return E_INVALID_ID;            /* Invalid id,return error            */
    }
#endif

    pecb = &EventTbl[id];
#if CFG_PAR_CHECKOUT_EN >0
    if(pecb->eventType != EVENT_TYPE_MBOX)/* Validate event control block type*/
    {
        return E_INVALID_ID;              /* Event is not mailbox,return error*/
    }
#endif

    if(pecb->eventCounter == 0)   /* If mailbox doesn't already have a message*/	
    {
        OsSchedLock();
        pecb->eventPtr     = pmail;       /* Place message in mailbox         */
        pecb->eventCounter = 1;
        EventTaskToRdy(pecb);             /* Check waiting list               */
        OsSchedUnlock();
        return E_OK;	
    }
    else                          /* If there is already a message in mailbox */              
    {
        return E_MBOX_FULL;       /* Mailbox is full,and return "E_MBOX_FULL" */
    }
}

/**
 *******************************************************************************
 * @brief      Reset task delay ticks
 * @param[in]  ptcb    Task that want to insert into DELAY list.
 * @param[in]  ticks   Specify system tick number which will delay .
 * @param[out] None
 * @retval     E_CALL               Error call in ISR.
 * @retval     E_INVALID_ID         Invalid task id.
 * @retval     E_NOT_IN_DELAY_LIST  Task not in delay list.
 * @retval     E_OK                 The current task was inserted to DELAY list
 *                                  successful,it will delay for specify time.
 * @par Description
 * @details    This function delay specify ticks for current task.
 *******************************************************************************
 */
StatusType CoResetTaskDelayTick(OS_TID taskID,U32 ticks) {
	P_OSTCB ptcb;


#if CFG_PAR_CHECKOUT_EN >0              /* Check validity of parameter        */
	if(taskID >= CFG_MAX_USER_TASKS + SYS_TASK_NUM) {
		return E_INVALID_ID;
	}
#endif

	ptcb = &TCBTbl[taskID];
#if CFG_PAR_CHECKOUT_EN >0
	if(ptcb->stkPtr == Co_NULL) {
		return E_INVALID_ID;
	}
#endif

	if(ptcb->delayTick == INVALID_VALUE) { /* Is tick==INVALID_VALUE?          */
		return E_NOT_IN_DELAY_LIST;       /* Yes,error return                 */
	}
	OsSchedLock();                        /* Lock schedule                    */
	RemoveDelayList(ptcb);                /* Remove task from the DELAY list  */

	if(ticks == 0) {                      /* Is delay tick==0?                */
		InsertToTCBRdyList(ptcb);         /* Insert task into the DELAY list  */
	} else {
		InsertDelayList(ptcb,ticks);      /* No,insert task into DELAY list   */
	}
	OsSchedUnlock();                /* Unlock schedule,and call task schedule */
	return E_OK;                          /* Return OK                        */
}

/**
 *******************************************************************************
 * @brief      Start multitask
 * @param[in]  None
 * @param[out] None
 * @retval     None
 *
 * @par Description
 * @details    This function is called to start multitask.After it is called,
 *             OS start schedule task by priority or/and time slice.
 * @note       This function must be called to start OS when you use CoOS,and must
 *             call after CoOsInit().
 *******************************************************************************
 */
void CoStartOS(void) {
	TCBRunning  = &TCBTbl[0];           /* Get running task                     */
	TCBNext     = TCBRunning;           /* Set next scheduled task as running task */
	TCBRunning->state = TASK_RUNNING;   /* Set running task status to RUNNING   */
	RemoveFromTCBRdyList(TCBRunning);   /* Remove running task from READY list  */
	OsSchedUnlock();					/* Enable Schedule,call task schedule   */
}

/**
 *******************************************************************************
 * @brief      Assign a TCB to task being created	 					
 * @param[in]  None     
 * @param[out] None     
 * 	 
 * @retval     XXXX							 
 *
 * @par Description
 * @details    This function is called to assign a task control block for task 
 *              being created.
 *******************************************************************************
 */
static P_OSTCB AssignTCB(void)
{
    P_OSTCB	ptcb;
    
    OsSchedLock();                      /* Lock schedule                      */
    if(FreeTCB == Co_NULL)                 /* Is there no free TCB               */
    {
        OsSchedUnlock();                /* Yes,unlock schedule                */
        return Co_NULL;                    /* Error return                       */
    }	
	ptcb    = FreeTCB;          /* Yes,assgin free TCB for this task  */    
	/* Set next item as the head of free TCB list                     */
    FreeTCB = FreeTCB->TCBnext; 
	OsSchedUnlock();
	return ptcb;
}

/**
 *******************************************************************************
 * @brief      AcceptSingleFlag
 * @param[in]  id     Flag ID.
 * @param[out] None
 * @retval     E_INVALID_ID      Invalid event ID.
 * @retval     E_FLAG_NOT_READY  Flag is not in ready state.
 * @retval     E_OK              The call was successful and your task owns the Flag.
 *
 * @par Description
 * @details    This fucntion is called to accept single flag
 * @note
 *******************************************************************************
 */
StatusType CoAcceptSingleFlag(OS_FlagID id)
{
    P_FCB pfcb;
    pfcb  = &FlagCrl;
#if CFG_PAR_CHECKOUT_EN >0
    if(id >= FLAG_MAX_NUM)
    {
        return E_INVALID_ID;            /* Invalid 'id',return error          */
    }
    if((pfcb->flagActive&(1<<id)) == 0)
    {
        return E_INVALID_ID;            /* Flag is deactive,return error      */
    }
#endif
    if((pfcb->flagRdy&(1<<id)) != 0)    /* If the required flag is set        */
    {
        OsSchedLock()
        pfcb->flagRdy &= ~((FlagCrl.resetOpt)&(1<<id)); /* Clear the flag     */
        OsSchedUnlock();
        return E_OK;
    }
    else                                /* If the required flag is not set    */
    {
        return E_FLAG_NOT_READY;
    }
}

/**
 *******************************************************************************
 * @brief       Post a semaphore	 
 * @param[in]   id   id of event control block associated with the desired semaphore.	 	 
 * @param[out]  None   
 * @retval      E_INVALID_ID   Parameter id passed was invalid event ID.
 * @retval      E_SEM_FULL     Semaphore full. 
 * @retval      E_OK           Semaphore had post successful.
 *
 * @par Description
 * @details    This function is called to post a semaphore to corresponding event. 
 *
 * @note 
 *******************************************************************************
 */
StatusType CoPostSem(OS_EventID id)
{
    P_ECB pecb;
#if CFG_PAR_CHECKOUT_EN >0
    if(id >= CFG_MAX_EVENT)	                  
    {
        return E_INVALID_ID;
    }
#endif

    pecb = &EventTbl[id];
#if CFG_PAR_CHECKOUT_EN >0
    if(pecb->eventType != EVENT_TYPE_SEM) /* Invalid event control block type */
    {
        return E_INVALID_ID;	
    }
#endif

    /* Make sure semaphore will not overflow */
    if(pecb->eventCounter == pecb->initialEventCounter) 
    {
        return E_SEM_FULL;    /* The counter of Semaphore reach the max number*/
    }
    OsSchedLock();
    pecb->eventCounter++;     /* Increment semaphore count to register event  */
    EventTaskToRdy(pecb);     /* Check semaphore event waiting list           */
    OsSchedUnlock();
    return E_OK;
		
}

/**
 *******************************************************************************
 * @brief      System tick interrupt handler.
 * @param[in]  None
 * @param[out] None
 * @retval     None
 *
 * @par Description
 * @details    This is system tick interrupt headler.
 * @note       CoOS may schedule when exiting this ISR.
 *******************************************************************************
 */
void SysTick_Handler(void) {
	OSSchedLock++;                  /* Lock scheduler.                        */
	OSTickCnt++;                    /* Increment systerm time.                */
#if CFG_TASK_WAITTING_EN >0
	if(DlyList != Co_NULL) {           /* Have task in delay list?               */
		if(DlyList->delayTick > 1) { /* Delay time > 1?                        */
			DlyList->delayTick--;   /* Decrease delay time of the list head.  */
		} else {
			DlyList->delayTick = 0;
			isr_TimeDispose();       /* Call hander for delay time list        */
		}
	}
#endif

#if CFG_TMR_EN > 0
	if(TmrList != Co_NULL) {           /* Have timer in working?                 */
		if(TmrList->tmrCnt > 1) {   /* Timer time > 1?                        */
			TmrList->tmrCnt--;      /* Decrease timer time of the list head.  */
		} else {
			TmrList->tmrCnt = 0;
			isr_TmrDispose();         /* Call hander for timer list             */
		}
	}
#endif
	TaskSchedReq = Co_TRUE;
	OsSchedUnlock();
}

/**
 *******************************************************************************
 * @brief      Get free block number in a memory partition	  
 * @param[in]  mmID    Specify memory partition.	
 *
 * @param[out] E_INVALID_ID  Invalid ID was passed and get counter failure.	  
 * @param[out] E_OK          Get current counter successful.
 * @retval     fbNum         The number of free block.	
 *
 * @par Description
 * @details    This function is called to get free block number in a memory 
 *             partition.
 *******************************************************************************
 */
U32 CoGetFreeBlockNum(OS_MMID mmID,StatusType* perr)
{
    U32       fbNum;	
    P_MM      memCtl;
    P_MemBlk  memBlk;
#if CFG_PAR_CHECKOUT_EN >0              /* Check validity of parameter        */
    if(mmID >= CFG_MAX_MM)
    {
        *perr = E_INVALID_ID;
        return 0;
    }
    if( ((1<<mmID)&MemoryIDVessel) == 0)
    {
        *perr = E_INVALID_ID;           /* Invalid memory id,return 0         */
        return 0;
    }
#endif	
    memCtl = &MemoryTbl[mmID];
    OsSchedLock();                      /* Lock schedule                      */
    memBlk = (P_MemBlk)(memCtl->freeBlock);/* Get the free item in memory list*/
    fbNum  = 0;
    while(memBlk != NULL)               /* Get counter of free item           */
    {
        fbNum++;
        memBlk = memBlk->nextBlock;     /* Get next free iterm                */
    }
    OsSchedUnlock();                    /* Unlock schedul                     */
    *perr = E_OK;							   
    return fbNum;                       /* Return the counter of free item    */
}

/**
 *******************************************************************************
 * @brief      Set a flag
 * @param[in]  id     Flag ID.
 * @param[out] None
 * @retval     E_INVALID_ID   Invalid event ID.
 * @retval     E_OK           Event deleted successful.
 *
 * @par Description
 * @details    This function is called to set a flag.
 * @note
 *******************************************************************************
 */
StatusType CoSetFlag(OS_FlagID id)
{
    P_FLAG_NODE pnode;
    P_FCB pfcb;
    pfcb  = &FlagCrl;

#if CFG_PAR_CHECKOUT_EN >0
    if(id >= FLAG_MAX_NUM)              /* Flag is valid or not               */
    {
        return E_INVALID_ID;            /* Invalid flag id                    */
    }
    if((pfcb->flagActive&(1<<id)) == 0)
    {
        return E_INVALID_ID;            /* Flag is not exist                  */
    }
#endif

    if((pfcb->flagRdy&(1<<id)) != 0)    /* Flag had already been set          */
    {
    	return E_OK;
    }

    pfcb->flagRdy |= (1<<id);           /* Update the flags ready list        */

    OsSchedLock();
    pnode = pfcb->headNode;
    while(pnode != Co_NULL)
    {
        if(pnode->waitType == OPT_WAIT_ALL)   /* Extract all the bits we want */
      	{
            if((pnode->waitFlags&pfcb->flagRdy) == pnode->waitFlags)
            {
               /* Remove the flag node from the wait list                    */
                pnode = RemoveFromLink(pnode);
                if((pfcb->resetOpt&(1<<id)) != 0)/* If the flags is auto-reset*/
                {
                    break;
                }
                continue;
            }
      	}
        else                           /* Extract only the bits we want       */
      	{
            if( (pnode->waitFlags & pfcb->flagRdy) != 0)
            {
                /* Remove the flag node from the wait list                    */
                pnode = RemoveFromLink(pnode);
                if((pfcb->resetOpt&(1<<id)) != 0)
                {
                    break;              /* The flags is auto-reset            */
                }
                continue;
            }
      	}
      	pnode = pnode->nextNode;
    }
    OsSchedUnlock();
    return E_OK;
}

/**
 *******************************************************************************
 * @brief      Release a ECB	 
 * @param[in]  pecb     A pointer to event control block which be released.	 
 * @param[out] None 
 * @retval     None	 
 *
 * @par Description
 * @details    This function is called to release a event control block when a 
 *             event be deleted.
 *******************************************************************************
 */
static void ReleaseECB(P_ECB pecb)
{
    pecb->eventType = EVENT_TYPE_INVALID;     /* Sign that not to use.        */ 
    OsSchedLock();                            /* Lock schedule                */
    pecb->eventPtr  = FreeEventList;          /* Release ECB that event hold  */
    FreeEventList   = pecb;                   /* Reset free event item        */
    OsSchedUnlock();                          /* Unlock schedule              */
}