fs_task.h

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//fs_task.h

typedef unsigned char  BOOLEAN;
typedef unsigned char  INT8U;                    /* Unsigned  8 bit quantity                           */
typedef signed   char  INT8S;                    /* Signed    8 bit quantity                           */
typedef unsigned int   INT16U;                   /* Unsigned 16 bit quantity                           */
typedef signed   int   INT16S;                   /* Signed   16 bit quantity                           */
typedef unsigned long  INT32U;                   /* Unsigned 32 bit quantity                           */
typedef signed   long  INT32S;                   /* Signed   32 bit quantity                           */
typedef float          FP32;                     /* Single precision floating point                    */
typedef double         FP64;                     /* Double precision floating point                    */

typedef unsigned char   OS_STK;                   /* Each stack entry is 16-bit wide                    */

#define BYTE           INT8S                     /* Define data types for backward compatibility ...   */
#define UBYTE          INT8U                     /* ... to uC/OS V1.xx.  Not actually needed for ...   */
#define WORD           INT16S                    /* ... uC/OS-II.                                      */
#define UWORD          INT16U
#define LONG           INT32S
#define ULONG          INT32U
#define NR_OPEN 20

typedef struct os_tcb {
    OS_STK      *  OSTCBStkPtr;        /* Pointer to current top of stack                              */

#if OS_TASK_CREATE_EXT_EN    
    void          *OSTCBExtPtr;        /* Pointer to user definable data for TCB extension             */
    OS_STK        *OSTCBStkBottom;     /* Pointer to bottom of stack                                   */
    INT32U         OSTCBStkSize;       /* Size of task stack (in bytes)                                */
    INT16U         OSTCBOpt;           /* Task options as passed by OSTaskCreateExt()                  */
    INT16U         OSTCBId;            /* Task ID (0..65535)                                           */
#endif

    struct os_tcb *OSTCBNext;          /* Pointer to next     TCB in the TCB list                      */
    struct os_tcb *OSTCBPrev;          /* Pointer to previous TCB in the TCB list                      */

#if (OS_Q_EN && (OS_MAX_QS >= 2)) || OS_MBOX_EN || OS_Sem_EN
    OS_EVENT      *OSTCBEventPtr;      /* Pointer to event control block                               */
#endif

#if (OS_Q_EN && (OS_MAX_QS >= 2)) || OS_MBOX_EN
    void          *OSTCBMsg;           /* Message received from OSMboxPost() or OSQPost()              */
#endif    

    INT16U         OSTCBDly;           /* Nbr ticks to delay task or, timeout waiting for event        */
    INT8U          OSTCBStat;          /* Task status                                                  */
    INT8U          OSTCBPrio;          /* Task priority (0 == highest, 63 == lowest)                   */

    INT8U          OSTCBX;             /* Bit position in group  corresponding to task priority (0..7) */
    INT8U          OSTCBY;             /* Index into ready table corresponding to task priority        */
    INT8U          OSTCBBitX;          /* Bit mask to access bit position in ready table               */
    INT8U          OSTCBBitY;          /* Bit mask to access bit position in ready group               */
    
#if OS_TASK_DEL_EN    
    BOOLEAN        OSTCBDelReq;        /* Indicates whether a task needs to delete itself              */
#endif

	/*add these fileds for file operation*/
	unsigned short umask;
	struct m_inode * pwd;
	struct m_inode * root;
	struct file * filp[NR_OPEN];
} OS_TCB;

OS_TCB  *  current;                        /* Pointer to currently running TCB              */