On Fri, Aug 2, 2013 at 2:38 PM, Sebastian Huber <
sebastian.hu...@embedded-brains.de> wrote:
> On 2013-08-02 03:03, Ashi wrote:
>
>>
>> + /** This field points to parent freechain node */
>> + POSIX_Keys_Freechain_node *fc_node_ptr;
>>
>>
>> I don't think we need this fc_node_ptr.
>>
>> Do you mean use a 'Container' macro instead?
>>
>
> Not necessarily, see below.
>
>
>>
>> + /** This field is the POSIX key used as an rbtree key */
>> + pthread_key_t key;
>> + /** This field is the Thread id also used as an rbtree key */
>> + Objects_Id thread_id;
>> + /** This field points to the POSIX key value of specific
>> thread */
>> + void *value;
>> +} POSIX_Keys_Rbtree_node;
>>
>>
>> I would call this POSIX_Keys_Key_value_pair.
>>
>> +
>> +/**
>> + * @brief POSIX_Keys_Freechain is used in Freechain structure
>> + */
>> +typedef struct {
>> + Freechain_Control super_fc;
>> + size_t bump_count;
>> +} POSIX_Keys_Freechain;
>> +
>> +/**
>> + * @brief POSIX_Keys_Freechain_node is freechain node
>> + */
>> +struct POSIX_Keys_Freechain_node___**struct {
>>
>> + Chain_Node ch_node;
>> + POSIX_Keys_Rbtree_node rb_node;
>> +};
>>
>>
>> Why not use POSIX_Keys_Rbtree_node directly?
>>
>> Since every freechain node needs a Chain_Node in its first field. There
>> is a
>> Chain_Node in POSIX_Keys_Rbtree_node, but it is used in each thread's key
>> value chain. So I add a Chain_Node to POSIX_Keys_Rbtree_node.
>>
>
> The key value pairs on the free chain are unused, thus not part of other
> data structures. So basically you can cast an unused object to any type
> provided it has enough storage.
Cool! I see. I didn't realise the whole key value pairs is actually unused
until it moves from Freechain to POSIX key value pair.
>
>
> --
> Sebastian Huber, embedded brains GmbH
>
> Address : Dornierstr. 4, D-82178 Puchheim, Germany
> Phone : +49 89 189 47 41-16
> Fax : +49 89 189 47 41-09
> E-Mail :
> sebastian.huber@embedded-**brains.de<sebastian.hu...@embedded-brains.de>
> PGP : Public key available on request.
>
> Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
>
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