Mercurial > dovecot > core-2.2
annotate src/lib-index/mail-index-strmap.h @ 22576:707ae9de3812
lib: istream-multiplex - Minor code cleanup
Avoid propagating the error twice, and avoid any confusion about what "got"
actually contains.
author | Timo Sirainen <timo.sirainen@dovecot.fi> |
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date | Thu, 05 Oct 2017 20:24:11 +0300 |
parents | e6c2a1344f86 |
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rev | line source |
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1 #ifndef MAIL_INDEX_STRMAP_H |
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2 #define MAIL_INDEX_STRMAP_H |
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3 |
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4 #include "hash2.h" |
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5 |
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6 struct mail_index; |
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7 struct mail_index_view; |
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8 |
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9 struct mail_index_strmap_header { |
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10 #define MAIL_INDEX_STRMAP_VERSION 1 |
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11 uint8_t version; |
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12 uint8_t unused[3]; |
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13 |
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14 uint32_t uid_validity; |
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15 }; |
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16 |
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17 struct mail_index_strmap_rec { |
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18 uint32_t uid; |
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19 uint32_t ref_index; |
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20 /* unique index number for the string */ |
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21 uint32_t str_idx; |
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22 }; |
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23 ARRAY_DEFINE_TYPE(mail_index_strmap_rec, struct mail_index_strmap_rec); |
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24 |
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25 typedef bool |
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26 mail_index_strmap_key_cmp_t(const char *key, |
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27 const struct mail_index_strmap_rec *rec, |
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28 void *context); |
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29 /* Returns 1 if matches, 0 if not, -1 if one of the records is expunged and |
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30 the result can't be determined */ |
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31 typedef int |
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32 mail_index_strmap_rec_cmp_t(const struct mail_index_strmap_rec *rec1, |
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33 const struct mail_index_strmap_rec *rec2, |
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34 void *context); |
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35 /* called when string indexes are renumbered. idx_map[old_idx] = new_idx. |
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36 if new_idx is 0, the record was expunged. As a special case if count=0, |
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37 the strmap was reset. */ |
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38 typedef void mail_index_strmap_remap_t(const uint32_t *idx_map, |
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39 unsigned int old_count, |
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40 unsigned int new_count, void *context); |
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41 |
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42 struct mail_index_strmap * |
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43 mail_index_strmap_init(struct mail_index *index, const char *suffix); |
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44 void mail_index_strmap_deinit(struct mail_index_strmap **strmap); |
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45 |
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46 /* Returns strmap records and hash that can be used for read-only access. |
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47 The records array always teminates with a record containing zeros (but it's |
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48 not counted in the array count). */ |
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49 struct mail_index_strmap_view * |
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50 mail_index_strmap_view_open(struct mail_index_strmap *strmap, |
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51 struct mail_index_view *idx_view, |
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52 mail_index_strmap_key_cmp_t *key_compare_cb, |
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53 mail_index_strmap_rec_cmp_t *rec_compare_cb, |
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54 mail_index_strmap_remap_t *remap_cb, |
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55 void *context, |
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56 const ARRAY_TYPE(mail_index_strmap_rec) **recs_r, |
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57 const struct hash2_table **hash_r); |
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58 void mail_index_strmap_view_close(struct mail_index_strmap_view **view); |
16689
e6c2a1344f86
lib-storage: If dovecot.index.thread corruption is noticed, delete the file.
Timo Sirainen <tss@iki.fi>
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59 void mail_index_strmap_view_set_corrupted(struct mail_index_strmap_view *view); |
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60 |
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61 /* Return the highest used string index. */ |
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62 uint32_t mail_index_strmap_view_get_highest_idx(struct mail_index_strmap_view *view); |
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63 |
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64 /* Synchronize strmap: Caller adds missing entries, expunged messages may be |
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65 removed internally and the changes are written to disk. Note that the strmap |
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66 recs/hash shouldn't be used until _sync_commit() is called, because the |
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67 string indexes may be renumbered if another process had already written the |
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68 same changes as us. */ |
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69 struct mail_index_strmap_view_sync * |
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70 mail_index_strmap_view_sync_init(struct mail_index_strmap_view *view, |
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71 uint32_t *last_uid_r); |
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72 void mail_index_strmap_view_sync_add(struct mail_index_strmap_view_sync *sync, |
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73 uint32_t uid, uint32_t ref_index, |
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74 const char *key); |
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75 void mail_index_strmap_view_sync_add_unique(struct mail_index_strmap_view_sync *sync, |
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76 uint32_t uid, uint32_t ref_index); |
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77 void mail_index_strmap_view_sync_commit(struct mail_index_strmap_view_sync **sync); |
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78 void mail_index_strmap_view_sync_rollback(struct mail_index_strmap_view_sync **sync); |
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79 |
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80 #endif |