diff options
Diffstat (limited to 'object-store.h')
| -rw-r--r-- | object-store.h | 115 |
1 files changed, 64 insertions, 51 deletions
diff --git a/object-store.h b/object-store.h index 63b7605a3e..b086f5ecdb 100644 --- a/object-store.h +++ b/object-store.h @@ -7,41 +7,34 @@ #include "sha1-array.h" #include "strbuf.h" -struct alternate_object_database { - struct alternate_object_database *next; - - /* see alt_scratch_buf() */ - struct strbuf scratch; - size_t base_len; +struct object_directory { + struct object_directory *next; /* - * Used to store the results of readdir(3) calls when searching - * for unique abbreviated hashes. This cache is never - * invalidated, thus it's racy and not necessarily accurate. - * That's fine for its purpose; don't use it for tasks requiring - * greater accuracy! + * Used to store the results of readdir(3) calls when we are OK + * sacrificing accuracy due to races for speed. That includes + * object existence with OBJECT_INFO_QUICK, as well as + * our search for unique abbreviated hashes. Don't use it for tasks + * requiring greater accuracy! + * + * Be sure to call odb_load_loose_cache() before using. */ char loose_objects_subdir_seen[256]; - struct oid_array loose_objects_cache; + struct oid_array loose_objects_cache[256]; /* * Path to the alternative object store. If this is a relative path, * it is relative to the current working directory. */ - char path[FLEX_ARRAY]; + char *path; }; + void prepare_alt_odb(struct repository *r); char *compute_alternate_path(const char *path, struct strbuf *err); -typedef int alt_odb_fn(struct alternate_object_database *, void *); +typedef int alt_odb_fn(struct object_directory *, void *); int foreach_alt_odb(alt_odb_fn, void*); /* - * Allocate a "struct alternate_object_database" but do _not_ actually - * add it to the list of alternates. - */ -struct alternate_object_database *alloc_alt_odb(const char *dir); - -/* * Add the directory to the on-disk alternates file; the new entry will also * take effect in the current process. */ @@ -55,12 +48,14 @@ void add_to_alternates_file(const char *dir); void add_to_alternates_memory(const char *dir); /* - * Returns a scratch strbuf pre-filled with the alternate object directory, - * including a trailing slash, which can be used to access paths in the - * alternate. Always use this over direct access to alt->scratch, as it - * cleans up any previous use of the scratch buffer. + * Populate and return the loose object cache array corresponding to the + * given object ID. */ -struct strbuf *alt_scratch_buf(struct alternate_object_database *alt); +struct oid_array *odb_loose_cache(struct object_directory *odb, + const struct object_id *oid); + +/* Empty the loose object cache for the specified object directory. */ +void odb_clear_loose_cache(struct object_directory *odb); struct packed_git { struct packed_git *next; @@ -82,7 +77,7 @@ struct packed_git { freshened:1, do_not_close:1, pack_promisor:1; - unsigned char sha1[20]; + unsigned char hash[GIT_MAX_RAWSZ]; struct revindex_entry *revindex; /* something like ".git/objects/pack/xxxxx.pack" */ char pack_name[FLEX_ARRAY]; /* more */ @@ -92,17 +87,21 @@ struct multi_pack_index; struct raw_object_store { /* - * Path to the repository's object store. - * Cannot be NULL after initialization. + * Set of all object directories; the main directory is first (and + * cannot be NULL after initialization). Subsequent directories are + * alternates. */ - char *objectdir; + struct object_directory *odb; + struct object_directory **odb_tail; + int loaded_alternates; - /* Path to extra alternate object database if not NULL */ + /* + * A list of alternate object directories loaded from the environment; + * this should not generally need to be accessed directly, but will + * populate the "odb" list when prepare_alt_odb() is run. + */ char *alternate_db; - struct alternate_object_database *alt_odb_list; - struct alternate_object_database **alt_odb_tail; - /* * Objects that should be substituted by other objects * (see git-replace(1)). @@ -155,19 +154,28 @@ void raw_object_store_clear(struct raw_object_store *o); /* * Put in `buf` the name of the file in the local object database that - * would be used to store a loose object with the specified sha1. + * would be used to store a loose object with the specified oid. */ -void sha1_file_name(struct repository *r, struct strbuf *buf, const unsigned char *sha1); +const char *loose_object_path(struct repository *r, struct strbuf *buf, + const struct object_id *oid); -void *map_sha1_file(struct repository *r, const unsigned char *sha1, unsigned long *size); +void *map_loose_object(struct repository *r, const struct object_id *oid, + unsigned long *size); -extern void *read_object_file_extended(const struct object_id *oid, +extern void *read_object_file_extended(struct repository *r, + const struct object_id *oid, enum object_type *type, unsigned long *size, int lookup_replace); -static inline void *read_object_file(const struct object_id *oid, enum object_type *type, unsigned long *size) +static inline void *repo_read_object_file(struct repository *r, + const struct object_id *oid, + enum object_type *type, + unsigned long *size) { - return read_object_file_extended(oid, type, size, 1); + return read_object_file_extended(r, oid, type, size, 1); } +#ifndef NO_THE_REPOSITORY_COMPATIBILITY_MACROS +#define read_object_file(oid, type, size) repo_read_object_file(the_repository, oid, type, size) +#endif /* Read and unpack an object file into memory, write memory to an object file */ int oid_object_info(struct repository *r, const struct object_id *, unsigned long *); @@ -200,20 +208,19 @@ int read_loose_object(const char *path, unsigned long *size, void **contents); -/* - * Convenience for sha1_object_info_extended() with a NULL struct - * object_info. OBJECT_INFO_SKIP_CACHED is automatically set; pass - * nonzero flags to also set other flags. - */ -extern int has_sha1_file_with_flags(const unsigned char *sha1, int flags); -static inline int has_sha1_file(const unsigned char *sha1) -{ - return has_sha1_file_with_flags(sha1, 0); -} +#ifndef NO_THE_REPOSITORY_COMPATIBILITY_MACROS +#define has_sha1_file_with_flags(sha1, flags) repo_has_sha1_file_with_flags(the_repository, sha1, flags) +#define has_sha1_file(sha1) repo_has_sha1_file(the_repository, sha1) +#endif /* Same as the above, except for struct object_id. */ -extern int has_object_file(const struct object_id *oid); -extern int has_object_file_with_flags(const struct object_id *oid, int flags); +int repo_has_object_file(struct repository *r, const struct object_id *oid); +int repo_has_object_file_with_flags(struct repository *r, + const struct object_id *oid, int flags); +#ifndef NO_THE_REPOSITORY_COMPATIBILITY_MACROS +#define has_object_file(oid) repo_has_object_file(the_repository, oid) +#define has_object_file_with_flags(oid, flags) repo_has_object_file_with_flags(the_repository, oid, flags) +#endif /* * Return true iff an alternate object database has a loose object @@ -273,6 +280,12 @@ struct object_info { #define OBJECT_INFO_QUICK 8 /* Do not check loose object */ #define OBJECT_INFO_IGNORE_LOOSE 16 +/* + * Do not attempt to fetch the object if missing (even if fetch_is_missing is + * nonzero). This is meant for bulk prefetching of missing blobs in a partial + * clone. Implies OBJECT_INFO_QUICK. + */ +#define OBJECT_INFO_FOR_PREFETCH (32 + OBJECT_INFO_QUICK) int oid_object_info_extended(struct repository *r, const struct object_id *, |