Andrew's git / gitweb.git /
79de47063988d4a1a575ac063812326f01e32665
   1#ifndef OBJECT_STORE_H
   2#define OBJECT_STORE_H
   3
   4struct alternate_object_database {
   5        struct alternate_object_database *next;
   6
   7        /* see alt_scratch_buf() */
   8        struct strbuf scratch;
   9        size_t base_len;
  10
  11        /*
  12         * Used to store the results of readdir(3) calls when searching
  13         * for unique abbreviated hashes.  This cache is never
  14         * invalidated, thus it's racy and not necessarily accurate.
  15         * That's fine for its purpose; don't use it for tasks requiring
  16         * greater accuracy!
  17         */
  18        char loose_objects_subdir_seen[256];
  19        struct oid_array loose_objects_cache;
  20
  21        char path[FLEX_ARRAY];
  22};
  23#define prepare_alt_odb(r) prepare_alt_odb_##r()
  24void prepare_alt_odb_the_repository(void);
  25char *compute_alternate_path(const char *path, struct strbuf *err);
  26typedef int alt_odb_fn(struct alternate_object_database *, void *);
  27int foreach_alt_odb(alt_odb_fn, void*);
  28
  29/*
  30 * Allocate a "struct alternate_object_database" but do _not_ actually
  31 * add it to the list of alternates.
  32 */
  33struct alternate_object_database *alloc_alt_odb(const char *dir);
  34
  35/*
  36 * Add the directory to the on-disk alternates file; the new entry will also
  37 * take effect in the current process.
  38 */
  39void add_to_alternates_file(const char *dir);
  40
  41/*
  42 * Add the directory to the in-memory list of alternates (along with any
  43 * recursive alternates it points to), but do not modify the on-disk alternates
  44 * file.
  45 */
  46void add_to_alternates_memory(const char *dir);
  47
  48/*
  49 * Returns a scratch strbuf pre-filled with the alternate object directory,
  50 * including a trailing slash, which can be used to access paths in the
  51 * alternate. Always use this over direct access to alt->scratch, as it
  52 * cleans up any previous use of the scratch buffer.
  53 */
  54struct strbuf *alt_scratch_buf(struct alternate_object_database *alt);
  55
  56struct packed_git {
  57        struct packed_git *next;
  58        struct list_head mru;
  59        struct pack_window *windows;
  60        off_t pack_size;
  61        const void *index_data;
  62        size_t index_size;
  63        uint32_t num_objects;
  64        uint32_t num_bad_objects;
  65        unsigned char *bad_object_sha1;
  66        int index_version;
  67        time_t mtime;
  68        int pack_fd;
  69        unsigned pack_local:1,
  70                 pack_keep:1,
  71                 freshened:1,
  72                 do_not_close:1,
  73                 pack_promisor:1;
  74        unsigned char sha1[20];
  75        struct revindex_entry *revindex;
  76        /* something like ".git/objects/pack/xxxxx.pack" */
  77        char pack_name[FLEX_ARRAY]; /* more */
  78};
  79
  80struct raw_object_store {
  81        /*
  82         * Path to the repository's object store.
  83         * Cannot be NULL after initialization.
  84         */
  85        char *objectdir;
  86
  87        /* Path to extra alternate object database if not NULL */
  88        char *alternate_db;
  89
  90        struct alternate_object_database *alt_odb_list;
  91        struct alternate_object_database **alt_odb_tail;
  92
  93        /*
  94         * private data
  95         *
  96         * should only be accessed directly by packfile.c
  97         */
  98
  99        struct packed_git *packed_git;
 100        /* A most-recently-used ordered version of the packed_git list. */
 101        struct list_head packed_git_mru;
 102
 103        /*
 104         * A fast, rough count of the number of objects in the repository.
 105         * These two fields are not meant for direct access. Use
 106         * approximate_object_count() instead.
 107         */
 108        unsigned long approximate_object_count;
 109        unsigned approximate_object_count_valid : 1;
 110
 111        /*
 112         * Whether packed_git has already been populated with this repository's
 113         * packs.
 114         */
 115        unsigned packed_git_initialized : 1;
 116};
 117
 118struct raw_object_store *raw_object_store_new(void);
 119void raw_object_store_clear(struct raw_object_store *o);
 120
 121#endif /* OBJECT_STORE_H */