Mercurial > dovecot > core-2.2

annotate src/lib-index/mail-cache-private.h @ 1915:79790750c349 HEAD

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importing new index code. mbox still broken.
author Timo Sirainen <tss@iki.fi>
date Tue, 27 Apr 2004 23:25:52 +0300
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children 97bb7b127617
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1915
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1 #ifndef __MAIL_CACHE_PRIVATE_H
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2 #define __MAIL_CACHE_PRIVATE_H
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3
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4 #include "mail-index-private.h"
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5 #include "mail-cache.h"
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6
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7 /* Never compress the file if it's smaller than this */
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8 #define COMPRESS_MIN_SIZE (1024*50)
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9
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10 /* Compress the file when deleted space reaches n% of total size */
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11 #define COMPRESS_PERCENTAGE 20
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12
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13 /* Compress the file when n% of rows contain continued rows.
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14 200% means that there's 2 continued rows per record. */
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15 #define COMPRESS_CONTINUED_PERCENTAGE 200
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16
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17 /* Initial size for the file */
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18 #define MAIL_CACHE_INITIAL_SIZE (sizeof(struct mail_cache_header) + 10240)
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19
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20 /* When more space is needed, grow the file n% larger than the previous size */
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21 #define MAIL_CACHE_GROW_PERCENTAGE 10
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22
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23 #define MAIL_CACHE_LOCK_TIMEOUT 120
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24 #define MAIL_CACHE_LOCK_CHANGE_TIMEOUT 60
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25 #define MAIL_CACHE_LOCK_IMMEDIATE_TIMEOUT (5*60)
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26
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27 #define CACHE_RECORD(cache, offset) \
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28 ((struct mail_cache_record *) ((char *) (cache)->mmap_base + offset))
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29
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30 struct mail_cache_header {
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31 uint32_t indexid;
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32 uint32_t file_seq;
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33
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34 uint32_t continued_record_count;
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35
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36 uint32_t used_file_size;
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37 uint32_t deleted_space;
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38
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39 uint32_t used_fields; /* enum mail_cache_field */
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40
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41 uint32_t field_usage_start; /* time_t */
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42 uint32_t field_usage_counts[32];
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43
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44 uint32_t header_offsets[MAIL_CACHE_HEADERS_COUNT];
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45 };
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46
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47 struct mail_cache_record {
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48 uint32_t fields; /* enum mail_cache_field */
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49 uint32_t next_offset;
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50 uint32_t size; /* full record size, including this header */
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51 };
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52
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53 struct mail_cache {
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54 struct mail_index *index;
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55
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56 char *filepath;
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57 int fd;
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58
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59 void *mmap_base;
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60 size_t mmap_length;
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61 uint32_t used_file_size;
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62
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63 struct mail_cache_header *hdr;
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64
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65 pool_t split_header_pool;
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66 uint32_t split_offsets[MAIL_CACHE_HEADERS_COUNT];
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67 const char *const *split_headers[MAIL_CACHE_HEADERS_COUNT];
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68
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69 enum mail_cache_field default_cache_fields;
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70 enum mail_cache_field never_cache_fields;
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71
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72 struct mail_cache_transaction_ctx *trans_ctx;
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73 unsigned int locks;
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74
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75 unsigned int mmap_refresh:1;
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76 unsigned int silent:1;
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77 };
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78
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79 struct mail_cache_view {
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80 struct mail_cache *cache;
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81 struct mail_index_view *view;
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82
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83 unsigned int broken:1;
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84 };
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85
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86 extern unsigned int mail_cache_field_sizes[32];
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87 extern enum mail_cache_field mail_cache_header_fields[MAIL_CACHE_HEADERS_COUNT];
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88
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89 uint32_t mail_cache_uint32_to_offset(uint32_t offset);
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90 uint32_t mail_cache_offset_to_uint32(uint32_t offset);
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91
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92 const char *
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93 mail_cache_get_header_fields_str(struct mail_cache *cache, unsigned int idx);
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94 const char *const *
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95 mail_cache_split_header(struct mail_cache *cache, const char *header);
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96
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97 struct mail_cache_record *
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98 mail_cache_get_record(struct mail_cache *cache, uint32_t offset);
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99 struct mail_cache_record *
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100 mail_cache_get_next_record(struct mail_cache *cache,
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101 struct mail_cache_record *rec);
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102
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103 struct mail_cache_record *
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104 mail_cache_lookup(struct mail_cache_view *view, uint32_t seq,
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105 enum mail_cache_field fields);
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106
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107 int
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108 mail_cache_transaction_autocommit(struct mail_cache_view *view,
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109 uint32_t seq, enum mail_cache_field fields);
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110
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111 void mail_cache_set_syscall_error(struct mail_cache *cache,
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112 const char *function);
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113
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114 #endif