how to track thread termination?

Question

Hi ALL I am using threadx. Is there any way i can wait on a thread. I need to know when a thread has completed its execution. This is possible in windows by using:

WaitForSingleObject((HANDLE)event, timeout);

Is there anything equivalent to that in threadx or any other rtos's.

Threadx only has the following APIs defined for threads. Can we use these to do the same.

UINT tx_thread_create(TX_THREAD *thread_ptr, CHAR *name_ptr,VOID (*entry_function)(ULONG), ULONG entry_input, VOID *stack_start, ULONG stack_size, UINT priority, UINT preempt_threshold, ULONG time_slice, UINT auto_start);

UINT tx_thread_delete(TX_THREAD *thread_ptr); TX_THREAD *tx_thread_identify(VOID);

UINT tx_thread_info_get(TX_THREAD *thread_ptr, CHAR **name, UINT *state, ULONG *run_count, UINT *priority, UINT *preemption_threshold, ULONG *time_slice, TX_THREAD **next_thread, TX_THREAD **next_suspended_thread);

UINT tx_thread_preemption_change(TX_THREAD *thread_ptr, UINT new_threshold, UINT *old_threshold);

UINT tx_thread_priority_change(TX_THREAD *thread_ptr, UINT new_priority, UINT *old_priority);

VOID tx_thread_relinquish(VOID);

UINT tx_thread_resume(TX_THREAD *thread_ptr);

UINT tx_thread_sleep(ULONG timer_ticks);

UINT tx_thread_suspend(TX_THREAD *thread_ptr);

UINT tx_thread_terminate(TX_THREAD *thread_ptr);

UINT tx_thread_time_slice_change(TX_THREAD *thread_ptr, ULONG new_time_slice, ULONG *old_time_slice);

UINT tx_thread_wait_abort(TX_THREAD *thread_ptr);

Thanks a LOT

1011 10

Arie de Muynck · Accepted Answer

AFAIK for ThreadX the only way to get a thread's state is to poll the state (you could do this in a repetitive thread which then signals an event):

UINT tx_thread_info_get( TX_THREAD *thread_ptr, CHAR **name, UINT *state, // see header files for the enum ULONG *run_count, UINT *priority, UINT *preemption_threshold, ULONG *time_slice, TX_THREAD **next_thread, TX_THREAD **next_suspended_thread );

or to signal an event from the thread itself just before the thread finishes in a _normal_ way, and never using an tx_thread_terminate() or the like.

If you do have the sources, you could easily add a function to the OS like:

tx_set_terminate_event(*TX_THREAD, *TX_EVENT, ULONG bits);

This would set in the TX_THREAD structure a pointer to an event that has to be signalled whenever a thread is terminated. Only the OS knows for sure when that state change happens...

111 11's, Arie de Muynck

Nicholas O. Lindan · Answer

Er, have the waited upon thread send a signal to the waitee upon completion.

-- Nicholas O. Lindan, Cleveland, Ohio Consulting Engineer: Electronics; Informatics; Photonics. To reply, remove spaces: n o lindan at ix . netcom . com psst.. want to buy an f-stop timer? nolindan.com/da/fstop/

Hans-Bernhard Broeker · Answer

If you have to actually *wait* for it, it's probably the wrong plan tomove that job to a separate thread in the first place.  If you justwant something done once the thread finishes, the thread should dothat by itself.-- Hans-Bernhard Broeker (Even if all the snow were burnt, ashes would remain.

1011 10 · Answer

Thanks a LOT everyone.

how to track thread termination?

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