c1274495ce
Make the oidmap a pointer. That way we eliminate the need for the global boolean variable 'replace_object_prepared' as we can put this information into the pointer being NULL or not. Another advantage of this is that we would more quickly catch code that tries to access replace-map without initializing it. This also allows the '#include "oidmap.h"' introduced in a previous patch to be replaced by the forward declaration of 'struct oidmap;'. Keeping the type opaque discourages circumventing accessor functions; not dragging in other headers avoids some compile time overhead. One disadvantage of this is change is performance as we need to pay the overhead for a malloc. The alternative of moving the global variable into the object store is less modular code. Helped-by: René Scharfe <l.s.r@web.de> Helped-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
141 lines
3.9 KiB
C
141 lines
3.9 KiB
C
#ifndef OBJECT_STORE_H
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#define OBJECT_STORE_H
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#include "oidmap.h"
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struct alternate_object_database {
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struct alternate_object_database *next;
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/* see alt_scratch_buf() */
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struct strbuf scratch;
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size_t base_len;
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/*
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* Used to store the results of readdir(3) calls when searching
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* for unique abbreviated hashes. This cache is never
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* invalidated, thus it's racy and not necessarily accurate.
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* That's fine for its purpose; don't use it for tasks requiring
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* greater accuracy!
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*/
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char loose_objects_subdir_seen[256];
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struct oid_array loose_objects_cache;
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/*
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* Path to the alternative object store. If this is a relative path,
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* it is relative to the current working directory.
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*/
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char path[FLEX_ARRAY];
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};
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void prepare_alt_odb(struct repository *r);
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char *compute_alternate_path(const char *path, struct strbuf *err);
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typedef int alt_odb_fn(struct alternate_object_database *, void *);
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int foreach_alt_odb(alt_odb_fn, void*);
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/*
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* Allocate a "struct alternate_object_database" but do _not_ actually
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* add it to the list of alternates.
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*/
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struct alternate_object_database *alloc_alt_odb(const char *dir);
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/*
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* Add the directory to the on-disk alternates file; the new entry will also
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* take effect in the current process.
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*/
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void add_to_alternates_file(const char *dir);
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/*
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* Add the directory to the in-memory list of alternates (along with any
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* recursive alternates it points to), but do not modify the on-disk alternates
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* file.
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*/
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void add_to_alternates_memory(const char *dir);
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/*
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* Returns a scratch strbuf pre-filled with the alternate object directory,
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* including a trailing slash, which can be used to access paths in the
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* alternate. Always use this over direct access to alt->scratch, as it
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* cleans up any previous use of the scratch buffer.
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*/
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struct strbuf *alt_scratch_buf(struct alternate_object_database *alt);
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struct packed_git {
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struct packed_git *next;
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struct list_head mru;
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struct pack_window *windows;
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off_t pack_size;
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const void *index_data;
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size_t index_size;
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uint32_t num_objects;
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uint32_t num_bad_objects;
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unsigned char *bad_object_sha1;
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int index_version;
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time_t mtime;
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int pack_fd;
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unsigned pack_local:1,
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pack_keep:1,
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freshened:1,
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do_not_close:1,
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pack_promisor:1;
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unsigned char sha1[20];
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struct revindex_entry *revindex;
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/* something like ".git/objects/pack/xxxxx.pack" */
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char pack_name[FLEX_ARRAY]; /* more */
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};
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struct raw_object_store {
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/*
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* Path to the repository's object store.
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* Cannot be NULL after initialization.
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*/
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char *objectdir;
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/* Path to extra alternate object database if not NULL */
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char *alternate_db;
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struct alternate_object_database *alt_odb_list;
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struct alternate_object_database **alt_odb_tail;
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/*
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* Objects that should be substituted by other objects
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* (see git-replace(1)).
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*/
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struct oidmap *replace_map;
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/*
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* private data
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*
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* should only be accessed directly by packfile.c
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*/
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struct packed_git *packed_git;
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/* A most-recently-used ordered version of the packed_git list. */
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struct list_head packed_git_mru;
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/*
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* A fast, rough count of the number of objects in the repository.
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* These two fields are not meant for direct access. Use
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* approximate_object_count() instead.
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*/
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unsigned long approximate_object_count;
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unsigned approximate_object_count_valid : 1;
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/*
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* Whether packed_git has already been populated with this repository's
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* packs.
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*/
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unsigned packed_git_initialized : 1;
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};
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struct raw_object_store *raw_object_store_new(void);
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void raw_object_store_clear(struct raw_object_store *o);
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/*
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* Put in `buf` the name of the file in the local object database that
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* would be used to store a loose object with the specified sha1.
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*/
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void sha1_file_name(struct repository *r, struct strbuf *buf, const unsigned char *sha1);
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void *map_sha1_file(struct repository *r, const unsigned char *sha1, unsigned long *size);
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#endif /* OBJECT_STORE_H */
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