/* The definition of the timers themselves. */
      typedef struct tmrTimerControl
{
const char                *pcTimerName;        /*<< Text name.  This is not used by the kernel, it is included simply to make debugging easier. */ /*lint !e971 Unqualified char types are allowed for strings and single characters only. */
ListItem_t                xTimerListItem;        /*<< Standard linked list item as used by all kernel features for event management. */
TickType_t                xTimerPeriodInTicks;/*<< How quickly and often the timer expires. */
UBaseType_t                uxAutoReload;        /*<< Set to pdTRUE if the timer should be automatically restarted once expired.  Set to pdFALSE if the timer is, in effect, a one-shot timer. */
void                     *pvTimerID;            /*<< An ID to identify the timer.  This allows the timer to be identified when the same callback is used for multiple timers. */
TimerCallbackFunction_t    pxCallbackFunction;    /*<< The function that will be called when the timer expires. */
#if( configUSE_TRACE_FACILITY == 1 )
#ifndef USING_LIST_TIMER_PROTECT
        UBaseType_t            uxTimerNumber;        /*<< An ID assigned by trace tools such as FreeRTOS+Trace */
#endif
    #endif
#ifdef USING_LIST_TIMER
    struct tmrTimerControl *next;

#ifdef USING_LIST_TIMER_PROTECT
        uint8_t my_entry_id;
        uint8_t rsvd[3];
#endif
#endif
} xTIMER;

 static timer list is array: timer_pool[OS_MAX_TIMER_BUCKETS] 
 ```

 dynamic timer list is created by `pvmalloc` memory:
 ```


 ```