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annotate src/tools.h @ 105:8d97455811a8

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author Thinker K.F. Li <thinker@branda.to>
date Thu, 11 Sep 2008 11:42:31 +0800
parents ca94493b75bb
children 6a8588df68af
rev   line source
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Thinker K.F. Li <thinker@branda.to>
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1 #ifndef __TOOLS_H_
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2 #define __TOOLS_H_
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3
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4
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5 typedef struct _elmpool elmpool_t;
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7 extern elmpool_t *elmpool_new(int elm_sz, int inc_num);
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8 extern void *elmpool_elm_alloc(elmpool_t *pool);
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9 extern void elmpool_elm_free(elmpool_t *pool, void *elm);
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10 extern void elmpool_free(elmpool_t *pool);
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13 #define STAILQ(type) \
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14 struct { \
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15 type *head; \
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16 type *tail; \
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17 }
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18 #define STAILQ_INIT(q) \
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19 do { \
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20 (q).head = (q).tail = NULL; \
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21 } while(0)
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22 #define STAILQ_CLEAN(q) STAILQ_INIT(q)
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23 #define STAILQ_HEAD(q) ((q).head)
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24 #define STAILQ_TAIL(q) ((q).tail)
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25 #define STAILQ_NEXT(type, field, elm) ((elm)->field)
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26 #define STAILQ_INS(q, type, field, elm) \
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27 do { \
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28 (elm)->field = (q).head; \
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29 (q).head = elm; \
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30 if((q).tail == NULL) \
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31 (q).tail = elm; \
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32 } while(0)
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33 #define STAILQ_INS_TAIL(q, type, field, elm) \
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34 do { \
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35 (elm)->field = NULL; \
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36 if((q).tail != NULL) \
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37 (q).tail->field = elm; \
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38 (q).tail = elm; \
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39 if((q).head == NULL) \
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40 (q).head = elm; \
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41 } while(0)
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42 #define STAILQ_INS_AFTER(type, field, follow, elm) \
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43 do { \
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44 (follow)->field = (elm)->field; \
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45 (elm)->field = follow; \
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46 } while(0)
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47 #define STAILQ_REMOVE(q, type, field, elm) \
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48 do { \
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49 if((elm) == (q).head) { \
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50 (q).head = (elm)->field; \
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51 if((q).head == NULL) \
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52 (q).tail = NULL; \
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53 } else { \
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54 type *_stailq_cur = (q).head; \
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55 while(_stailq_cur != NULL && \
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56 _stailq_cur->field != (elm)) \
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57 _stailq_cur = _stailq_cur->field; \
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58 if(_stailq_cur != NULL) { \
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59 _stailq_cur->field = elm; \
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60 if((q).tail == (elm)) \
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61 (q).tail = _stailq_cur; \
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62 } \
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63 } \
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64 } while(0)
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65
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67 #define O_ALLOC(type) ((type *)malloc(sizeof(type)))
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69 #define OFFSET(type, mem) (((void *)&((type *)NULL)->mem) - NULL)
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70 #define MEM2OBJ(var, type, mem) ((type *)((void *)var - OFFSET(type, mem)))
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71 #define OFF2TYPE(obj, off, type) (*(type *)((void *)(obj) + (off)))
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72
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73 #endif /* __TOOLS_H_ */