OSInit|OS_InitMisc()|OS_InitRdyList()

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void  OSInit (void)
{
#if OS_VERSION >= 204
    OSInitHookBegin();                                           /* Call port specific initialization code   */
#endif

    OS_InitMisc();                                               /* Initialize miscellaneous variables       */

    OS_InitRdyList();                                            /* Initialize the Ready List                */
    OS_InitTCBList();                                            /* Initialize the free list of OS_TCBs      */
    OS_InitEventList();                                          /* Initialize the free list of OS_EVENTs    */

#if (OS_VERSION >= 251) && (OS_FLAG_EN > 0) && (OS_MAX_FLAGS > 0)
    OS_FlagInit();                                               /* Initialize the event flag structures     */
#endif

#if (OS_MEM_EN > 0) && (OS_MAX_MEM_PART > 0)
    OS_MemInit();                                                /* Initialize the memory manager            */
#endif

#if (OS_Q_EN > 0) && (OS_MAX_QS > 0)
    OS_QInit();                                                  /* Initialize the message queue structures  */
#endif

    OS_InitTaskIdle();                                           /* Create the Idle Task                     */
#if OS_TASK_STAT_EN > 0
    OS_InitTaskStat();                                           /* Create the Statistic Task                */
#endif

#if OS_VERSION >= 204
    OSInitHookEnd();                                             /* Call port specific init. code            */
#endif
}

相关函数：
OS_InitMisc() 
OS_InitRdyList()
OS_InitTCBList()      

---

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static  void  OS_InitMisc (void)
 {
 #if OS_TIME_GET_SET_EN > 0  
     OSTime        = 0L;                                          /* Clear the 32-bit system clock            */
 #endif
 
     OSIntNesting  = 0;                                           /* Clear the interrupt nesting counter      */
     OSLockNesting = 0;                                           /* Clear the scheduling lock counter        */
 
     OSTaskCtr     = 0;                                           /* Clear the number of tasks                */
 
     OSRunning     = FALSE;                                       /* Indicate that multitasking not started   */
    
     OSCtxSwCtr    = 0;                                           /* Clear the context switch counter         */
     OSIdleCtr     = 0L;                                          /* Clear the 32-bit idle counter            */
 
 #if (OS_TASK_STAT_EN > 0) && (OS_TASK_CREATE_EXT_EN > 0)
     OSIdleCtrRun  = 0L;
     OSIdleCtrMax  = 0L;
     OSStatRdy     = FALSE;                                       /* Statistic task is not ready              */
 #endif
 }

说明：

OSTime：32 位系统时钟
OSIntNesting：中断嵌套层数
OSLockNesting：任务上锁层数
OSTaskCtr ：任务数
OSRunning：多任务是否启动标志，True 为启动，False 为不启动
OSCtxSwCtr：任务切换计数器
OSIdleCtr：32 位空闲任务计数器
OSIdleCtrRun：保存上一秒空闲任务计数器 OSIdleCtr 的值
OSIdleCtrMax：1s 内空闲计数器能达到的最大值

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static  void  OS_InitRdyList (void)
{
    INT16U   i;
    INT8U   *prdytbl;


    OSRdyGrp      = 0x00;                                        /*清就绪任务组*/
    prdytbl       = &OSRdyTbl[0];
    for (i = 0; i < OS_RDY_TBL_SIZE; i++) {
        *prdytbl++ = 0x00;                                         /*清就绪任务表*/
    }

    OSPrioCur     = 0;                                             /*当前任务优先级号*/
    OSPrioHighRdy = 0;                                        /*已就绪最高优先级任务号*/

    OSTCBHighRdy  = (OS_TCB *)0;                /*已就绪最高优先级任务TCB指针初始为空*/                
    OSTCBCur      = (OS_TCB *)0;                   /*当前任务TCB指针为空*/
}