从零开始学习UCOSII操作系统2–UCOSII的内核实现「建议收藏」

typedef struct os_tcb {
    OS_STK          *OSTCBStkPtr;      /* 指向当前任务堆栈栈顶的指针                            */

#if OS_TASK_CREATE_EXT_EN > 0
    void            *OSTCBExtPtr;      /* 指向用户定义的任务控制块扩展，这个数据结构包括了任务的名字   */
    OS_STK          *OSTCBStkBottom;   /* 以跟踪某个任务的执行时间，或者跟踪到某个任务的次                          */
    INT32U           OSTCBStkSize;     /* Size of task stack (in number of stack elements)             */
    INT16U           OSTCBOpt;         /* Task options as passed by OSTaskCreateExt()                  */
    INT16U           OSTCBId;          /* Task ID (0..65535)                                           */
#endif

    struct os_tcb   *OSTCBNext;        /* 任务之间的双向链表的使用    */
    struct os_tcb   *OSTCBPrev;        /* Pointer to previous TCB in the TCB list                      */

#if OS_EVENT_EN
    OS_EVENT        *OSTCBEventPtr;    /* 指向任务的事件控制块                 */
#endif

#if ((OS_Q_EN > 0) && (OS_MAX_QS > 0)) || (OS_MBOX_EN > 0)
    void            *OSTCBMsg;         /* 指向传递给任务的消息的指针            */
#endif

#if (OS_VERSION >= 251) && (OS_FLAG_EN > 0) && (OS_MAX_FLAGS > 0)
#if OS_TASK_DEL_EN > 0
    OS_FLAG_NODE    *OSTCBFlagNode;    /* 指向事件标志组的指针                  */
#endif
    OS_FLAGS         OSTCBFlagsRdy;    /* 当任务等待事件标志组时候， OSTCBFlagRdy是使任务进入就绪态的事件标志*/
#endif

    INT16U           OSTCBDly;         /* 当需要把任务延时诺干个节拍时，或者需要把任务挂起一段时间等待某个事件的发生，需要使用这个变量 */
    INT8U            OSTCBStat;        /* 任务的状态                    */
    BOOLEAN          OSTCBPendTO;      /* 等待标志组超时          */
    INT8U            OSTCBPrio;        /* Task priority (0 == highest)                                 */

    INT8U            OSTCBX;           /* Bit position in group  corresponding to task priority        */
    INT8U            OSTCBY;           /* Index into ready table corresponding to task priority        */
#if OS_LOWEST_PRIO <= 63
    INT8U            OSTCBBitX;        /* Bit mask to access bit position in ready table               */
    INT8U            OSTCBBitY;        /* Bit mask to access bit position in ready group               */
#else
    INT16U           OSTCBBitX;        /* Bit mask to access bit position in ready table               */
    INT16U           OSTCBBitY;        /* Bit mask to access bit position in ready group               */
#endif

#if OS_TASK_DEL_EN > 0
    INT8U            OSTCBDelReq;      /* Indicates whether a task needs to delete itself              */
#endif

#if OS_TASK_PROFILE_EN > 0
    INT32U           OSTCBCtxSwCtr;    /* Number of time the task was switched in                      */
    INT32U           OSTCBCyclesTot;   /* Total number of clock cycles the task has been running       */
    INT32U           OSTCBCyclesStart; /* Snapshot of cycle counter at start of task resumption        */
    OS_STK          *OSTCBStkBase;     /* Pointer to the beginning of the task stack                   */
    INT32U           OSTCBStkUsed;     /* Number of bytes used from the stack                          */
#endif

#if OS_TASK_NAME_SIZE > 1
    INT8U            OSTCBTaskName[OS_TASK_NAME_SIZE];
#endif
} OS_TCB;