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annotate include/mb_prop.h @ 434:b5c7670b524b

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author Thinker K.F. Li <thinker@branda.to>
date Wed, 29 Jul 2009 16:35:13 +0800
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1 #ifndef __MB_PROP_H_
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2 #define __MB_PROP_H_
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3
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4 #include "mb_tools.h"
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5
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6 /*! \defgroup mb_prop_grp Property
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7 * \brief A way the modules can set up their own properties on objects.
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8 *
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9 * Properties are key-value pairs that are associated with objects.
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10 * MadButterfly associate a property store for each object (coord or shape)
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11 * to keep property values. Every property is identified by a ID; an
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12 * integer. Programmer can use a ID to set/get value to/from a property
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13 * store. The ID should be unique in a property store.
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14 *
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15 * \todo Add a free function pointer on entries to release resources when
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16 * the store is destroy. (See: \ref mouse.c)
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17 *
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18 * @{
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19 */
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20
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21 typedef struct _mb_prop_entry mb_prop_entry_t;
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22 typedef struct _mb_prop_store mb_prop_store_t;
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23
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24 struct _mb_prop_entry {
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25 int id;
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26 void *value;
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27 mb_prop_entry_t *next;
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28 };
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29
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30 /*! \brief Property IDs. */
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31 enum {
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32 PROP_DUMMY,
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33 PROP_MEVT_OB_CNT,
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34 PROP_MEVT_OBSERVER,
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35 PROP_LAST
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36 };
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37
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38 struct _mb_prop_store {
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39 elmpool_t *entry_pool;
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40 STAILQ(mb_prop_entry_t) entries;
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41 };
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42
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43 #define mb_prop_store_init(prop_store, pent_pool) \
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44 do { \
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45 (prop_store)->entry_pool = pent_pool; \
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46 STAILQ_INIT((prop_store)->entries); \
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47 } while(0)
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48
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49 void mb_prop_store_destroy(mb_prop_store_t *prop_store);
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50 void *mb_prop_set(mb_prop_store_t *prop_store, int id, void *value);
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51 void *mb_prop_get(mb_prop_store_t *prop_store, int id);
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52 void mb_prop_del(mb_prop_store_t *prop_store, int id);
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53 int mb_prop_has(mb_prop_store_t *prop_store, int id);
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54
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55 /* @} */
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56
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57 #endif /* __MB_PROP_H_ */