On Thu, Sep 3, 2015 at 8:01 AM, Sebastian Huber
<sebastian.hu...@embedded-brains.de> wrote:
> ---
> cpukit/score/include/rtems/score/threadq.h | 31
> ++++++++++++++++++++++++++++--
> 1 file changed, 29 insertions(+), 2 deletions(-)
>
> diff --git a/cpukit/score/include/rtems/score/threadq.h
> b/cpukit/score/include/rtems/score/threadq.h
> index 8f2b138..2b58310 100644
> --- a/cpukit/score/include/rtems/score/threadq.h
> +++ b/cpukit/score/include/rtems/score/threadq.h
> @@ -44,6 +44,13 @@ typedef struct _Thread_Control Thread_Control;
> /**
> * @brief Thread queue heads.
> *
> + * Each thread is equipped with spare thread queue heads in case it not
it not --> it is not
> + * enqueued on a thread queue. The first thread enqueued on a thread queue
> + * will give its spare thread queue heads to this thread queue. The threads
this --> that
> + * arriving at the queue will add their thread queue heads to the free chain
> of
> + * the queue heads provided by the first thread enqueued. Once a thread is
> + * dequeued it use the free chain to get new spare thread queue heads.
> + *
> * Uses a leading underscore in the structure name to allow forward
> * declarations in standard header files provided by Newlib and GCC.
> */
> @@ -52,18 +59,38 @@ typedef struct _Thread_queue_Heads {
> * set of tasks which varies based upon the discipline.
> */
> union {
> - /** This is the FIFO discipline list. */
> + /**
> + * @brief This is the FIFO discipline list.
> + */
> Chain_Control Fifo;
> - /** This is the set of threads for priority discipline waiting. */
> +
> + /**
> + * @brief This is the set of threads for priority discipline waiting.
> + */
> RBTree_Control Priority;
> } Heads;
>
> + /**
> + * @brief A chain with free thread queue heads providing the spare thread
> + * queue heads for a thread once it is dequeued.
> + */
> Chain_Control Free_chain;
>
> + /**
> + * @brief A chain node to add these thread queue heads to the free chain of
> + * the thread queue heads dedicated to the thread queue of an object.
> + */
> Chain_Node Free_node;
> } Thread_queue_Heads;
>
> typedef struct {
> + /**
> + * @brief The thread queue heads.
> + *
> + * This pointer is NULL, if and only if no threads are enqueued. The first
> + * thread to enqueue will give its spare thread queue heads to this thread
> + * queue.
> + */
> Thread_queue_Heads *heads;
>
> /**
> --
> 1.8.4.5
>
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