#include "list.h"
#include "sha1-array.h"
#include "strbuf.h"
+#include "thread-utils.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);
+typedef void alternate_ref_fn(const struct object_id *oid, void *);
+void for_each_alternate_ref(alternate_ref_fn, void *);
/*
* Add the directory to the on-disk alternates file; the new entry will also
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 hashmap_entry packmap_ent;
struct packed_git *next;
struct list_head mru;
struct pack_window *windows;
pack_keep_in_core:1,
freshened:1,
do_not_close:1,
- pack_promisor:1;
- unsigned char sha1[20];
+ pack_promisor:1,
+ multi_pack_index:1;
+ unsigned char hash[GIT_MAX_RAWSZ];
struct revindex_entry *revindex;
/* something like ".git/objects/pack/xxxxx.pack" */
char pack_name[FLEX_ARRAY]; /* more */
};
+struct multi_pack_index;
+
+static inline int pack_map_entry_cmp(const void *unused_cmp_data,
+ const struct hashmap_entry *entry,
+ const struct hashmap_entry *entry2,
+ const void *keydata)
+{
+ const char *key = keydata;
+ const struct packed_git *pg1, *pg2;
+
+ pg1 = container_of(entry, const struct packed_git, packmap_ent);
+ pg2 = container_of(entry2, const struct packed_git, packmap_ent);
+
+ return strcmp(pg1->pack_name, key ? key : pg2->pack_name);
+}
+
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)).
*/
struct oidmap *replace_map;
+ unsigned replace_map_initialized : 1;
+ pthread_mutex_t replace_mutex; /* protect object replace functions */
struct commit_graph *commit_graph;
unsigned commit_graph_attempted : 1; /* if loading has been attempted */
+ /*
+ * private data
+ *
+ * should only be accessed directly by packfile.c and midx.c
+ */
+ struct multi_pack_index *multi_pack_index;
+
/*
* private data
*
/* A most-recently-used ordered version of the packed_git list. */
struct list_head packed_git_mru;
+ /*
+ * A map of packfiles to packed_git structs for tracking which
+ * packs have been loaded already.
+ */
+ struct hashmap pack_map;
+
/*
* A fast, rough count of the number of objects in the repository.
* These two fields are not meant for direct access. Use
/*
* 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);
-
-void *map_sha1_file(struct repository *r, const unsigned char *sha1, unsigned long *size);
-
-extern void *read_object_file_extended(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)
+const char *loose_object_path(struct repository *r, struct strbuf *buf,
+ const struct object_id *oid);
+
+void *map_loose_object(struct repository *r, const struct object_id *oid,
+ unsigned long *size);
+
+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 *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 *);
-extern int hash_object_file(const void *buf, unsigned long len,
- const char *type, struct object_id *oid);
+int hash_object_file(const struct git_hash_algo *algo, const void *buf,
+ unsigned long len, const char *type,
+ struct object_id *oid);
-extern int write_object_file(const void *buf, unsigned long len,
- const char *type, struct object_id *oid);
+int write_object_file(const void *buf, unsigned long len,
+ const char *type, struct object_id *oid);
-extern int hash_object_file_literally(const void *buf, unsigned long len,
- const char *type, struct object_id *oid,
- unsigned flags);
+int hash_object_file_literally(const void *buf, unsigned long len,
+ const char *type, struct object_id *oid,
+ unsigned flags);
-extern int pretend_object_file(void *, unsigned long, enum object_type,
- struct object_id *oid);
+/*
+ * Add an object file to the in-memory object store, without writing it
+ * to disk.
+ *
+ * Callers are responsible for calling write_object_file to record the
+ * object in persistent storage before writing any other new objects
+ * that reference it.
+ */
+int pretend_object_file(void *, unsigned long, enum object_type,
+ struct object_id *oid);
-extern int force_object_loose(const struct object_id *oid, time_t mtime);
+int force_object_loose(const struct object_id *oid, time_t mtime);
/*
* Open the loose object at path, check its hash, and return the contents,
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
* with the specified name. This function does not respect replace
* references.
*/
-extern int has_loose_object_nonlocal(const struct object_id *);
+int has_loose_object_nonlocal(const struct object_id *);
+
+void assert_oid_type(const struct object_id *oid, enum object_type expect);
+
+/*
+ * Enabling the object read lock allows multiple threads to safely call the
+ * following functions in parallel: repo_read_object_file(), read_object_file(),
+ * read_object_file_extended(), read_object_with_reference(), read_object(),
+ * oid_object_info() and oid_object_info_extended().
+ *
+ * obj_read_lock() and obj_read_unlock() may also be used to protect other
+ * section which cannot execute in parallel with object reading. Since the used
+ * lock is a recursive mutex, these sections can even contain calls to object
+ * reading functions. However, beware that in these cases zlib inflation won't
+ * be performed in parallel, losing performance.
+ *
+ * TODO: oid_object_info_extended()'s call stack has a recursive behavior. If
+ * any of its callees end up calling it, this recursive call won't benefit from
+ * parallel inflation.
+ */
+void enable_obj_read_lock(void);
+void disable_obj_read_lock(void);
+
+extern int obj_read_use_lock;
+extern pthread_mutex_t obj_read_mutex;
+
+static inline void obj_read_lock(void)
+{
+ if(obj_read_use_lock)
+ pthread_mutex_lock(&obj_read_mutex);
+}
-extern void assert_oid_type(const struct object_id *oid, enum object_type expect);
+static inline void obj_read_unlock(void)
+{
+ if(obj_read_use_lock)
+ pthread_mutex_unlock(&obj_read_mutex);
+}
struct object_info {
/* Request */
enum object_type *typep;
unsigned long *sizep;
off_t *disk_sizep;
- unsigned char *delta_base_sha1;
+ struct object_id *delta_base_oid;
struct strbuf *type_name;
void **contentp;
#define OBJECT_INFO_LOOKUP_REPLACE 1
/* Allow reading from a loose object file of unknown/bogus type */
#define OBJECT_INFO_ALLOW_UNKNOWN_TYPE 2
-/* Do not check cached storage */
-#define OBJECT_INFO_SKIP_CACHED 4
/* Do not retry packed storage after checking packed and loose storage */
#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).
+ */
+#define OBJECT_INFO_SKIP_FETCH_OBJECT 32
+/*
+ * This is meant for bulk prefetching of missing blobs in a partial
+ * clone. Implies OBJECT_INFO_SKIP_FETCH_OBJECT and OBJECT_INFO_QUICK
+ */
+#define OBJECT_INFO_FOR_PREFETCH (OBJECT_INFO_SKIP_FETCH_OBJECT | OBJECT_INFO_QUICK)
int oid_object_info_extended(struct repository *r,
const struct object_id *,
projects / thirdparty / git.git / blobdiff