in testsuites spwatchdog, when _Watchdog_Remove is called?

Chan Kim ckim at
Thu Nov 19 15:24:19 UTC 2015

Oh, I found in watchdogtickle.c that when the watchdog_tickle runs every rtems_timer_tick, when the timer expires, the watchdog is removed. I should have checked every functions calling _Watchdog_Remove. Thanks.

보낸 사람 : "Chan Kim" <ckim at>
보낸 날짜 : 2015-11-19 21:19:09 ( +09:00 )
받는 사람 : users at <users at>
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제목 : in testsuites spwatchdog, when _Watchdog_Remove is called?

Hi rtems users and gurus,

I was trying to learn how to use watchdog in rtems and was following testsuites/sptests/spwatchdog.
There, Init task creates a timer and starts task 1 before killing itself. The beginning of task1 code looks like below. 
(This test is to see if watchdog timer works as intended.)
When I ran this code on our board(sparc), I learned _Watchdog_Remove function is called inside rtems_timer_fire_after function which I can understand because watchdog should be removed when the timer is newly armed.
After 3 seconds, the timer fires and Delayed_resume function runs which resumes task 1. 
After woken up, task 1 prints the time using Print_time() function.
But just before printing time, I noticed _Watchdog_Remove function is called. (This is surely after 3 seconds, just before printing time)
In what route, is the _Watchdog_Remove function is called after the task is resumed?(or is it during the resuming action?)
I know from grepping that _Watchdog_Remove is called in many timer related functions but this one I don't know where it's coming from. I would appreciate it if anyone tell me.

rtems_task Task_1(
rtems_task_argument argument
rtems_id tmid;
rtems_status_code status;
/* Get id */
puts( "TA1 - rtems_timer_ident - identing timer 1" );
status = rtems_timer_ident( Timer_name[ 1 ], &tmid );
directive_failed( status, "rtems_timer_ident" );
printf( "TA1 - timer 1 has id (0x%" PRIxrtems_id ")\n", tmid );
/* after which is allowed to fire */
puts( "TA1 - rtems_timer_fire_after - timer 1 in 3 seconds" );
status = rtems_timer_fire_after(
3 * rtems_clock_get_ticks_per_second(),
directive_failed( status, "rtems_timer_fire_after" );
puts( "TA1 - rtems_task_suspend( RTEMS_SELF )" );
status = rtems_task_suspend( RTEMS_SELF );
directive_failed( status, "rtems_task_suspend" );

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