Andrew's git - gitweb.git/blob

   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};
  23void prepare_alt_odb(void);
  24char *compute_alternate_path(const char *path, struct strbuf *err);
  25typedef int alt_odb_fn(struct alternate_object_database *, void *);
  26int foreach_alt_odb(alt_odb_fn, void*);
  27
  28/*
  29 * Allocate a "struct alternate_object_database" but do _not_ actually
  30 * add it to the list of alternates.
  31 */
  32struct alternate_object_database *alloc_alt_odb(const char *dir);
  33
  34/*
  35 * Add the directory to the on-disk alternates file; the new entry will also
  36 * take effect in the current process.
  37 */
  38void add_to_alternates_file(const char *dir);
  39
  40/*
  41 * Add the directory to the in-memory list of alternates (along with any
  42 * recursive alternates it points to), but do not modify the on-disk alternates
  43 * file.
  44 */
  45void add_to_alternates_memory(const char *dir);
  46
  47/*
  48 * Returns a scratch strbuf pre-filled with the alternate object directory,
  49 * including a trailing slash, which can be used to access paths in the
  50 * alternate. Always use this over direct access to alt->scratch, as it
  51 * cleans up any previous use of the scratch buffer.
  52 */
  53struct strbuf *alt_scratch_buf(struct alternate_object_database *alt);
  54
  55struct packed_git {
  56        struct packed_git *next;
  57        struct list_head mru;
  58        struct pack_window *windows;
  59        off_t pack_size;
  60        const void *index_data;
  61        size_t index_size;
  62        uint32_t num_objects;
  63        uint32_t num_bad_objects;
  64        unsigned char *bad_object_sha1;
  65        int index_version;
  66        time_t mtime;
  67        int pack_fd;
  68        unsigned pack_local:1,
  69                 pack_keep:1,
  70                 freshened:1,
  71                 do_not_close:1,
  72                 pack_promisor:1;
  73        unsigned char sha1[20];
  74        struct revindex_entry *revindex;
  75        /* something like ".git/objects/pack/xxxxx.pack" */
  76        char pack_name[FLEX_ARRAY]; /* more */
  77};
  78
  79struct raw_object_store {
  80        /*
  81         * Path to the repository's object store.
  82         * Cannot be NULL after initialization.
  83         */
  84        char *objectdir;
  85
  86        /* Path to extra alternate object database if not NULL */
  87        char *alternate_db;
  88
  89        struct alternate_object_database *alt_odb_list;
  90        struct alternate_object_database **alt_odb_tail;
  91
  92        /*
  93         * private data
  94         *
  95         * should only be accessed directly by packfile.c
  96         */
  97
  98        struct packed_git *packed_git;
  99        /* A most-recently-used ordered version of the packed_git list. */
 100        struct list_head packed_git_mru;
 101
 102        /*
 103         * A fast, rough count of the number of objects in the repository.
 104         * These two fields are not meant for direct access. Use
 105         * approximate_object_count() instead.
 106         */
 107        unsigned long approximate_object_count;
 108        unsigned approximate_object_count_valid : 1;
 109
 110        /*
 111         * Whether packed_git has already been populated with this repository's
 112         * packs.
 113         */
 114        unsigned packed_git_initialized : 1;
 115};
 116
 117struct raw_object_store *raw_object_store_new(void);
 118void raw_object_store_clear(struct raw_object_store *o);
 119
 120#endif /* OBJECT_STORE_H */