mirror of
https://github.com/git/git.git
synced 2026-08-09 09:34:14 +00:00
64136a8207
Move the logic to read object info from a "packed" source into "odb/source-packed.c" and wire it up as the `read_object_info()` callback. Note that we also move around the supporting `find_pack_entry()`, but we still have to expose it to other callers that exist in "packfile.c". This will be fixed in subsequent commits though, where all callers in "packfile.c" will have been moved into "odb/source-packed.c", and at that point we'll be able to make `find_pack_entry()` file-local again. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
100 lines
2.9 KiB
C
100 lines
2.9 KiB
C
#ifndef ODB_SOURCE_PACKED_H
|
|
#define ODB_SOURCE_PACKED_H
|
|
|
|
#include "odb/source.h"
|
|
#include "packfile-list.h"
|
|
#include "strmap.h"
|
|
|
|
/*
|
|
* A store that manages packfiles for a given object database.
|
|
*/
|
|
struct odb_source_packed {
|
|
struct odb_source base;
|
|
struct odb_source_files *files;
|
|
|
|
/*
|
|
* The list of packfiles in the order in which they have been most
|
|
* recently used.
|
|
*/
|
|
struct packfile_list packs;
|
|
|
|
/*
|
|
* Cache of packfiles which are marked as "kept", either because there
|
|
* is an on-disk ".keep" file or because they are marked as "kept" in
|
|
* memory.
|
|
*
|
|
* Should not be accessed directly, but via
|
|
* `packfile_store_get_kept_pack_cache()`. The list of packs gets
|
|
* invalidated when the stored flags and the flags passed to
|
|
* `packfile_store_get_kept_pack_cache()` mismatch.
|
|
*/
|
|
struct {
|
|
struct packed_git **packs;
|
|
unsigned flags;
|
|
} kept_cache;
|
|
|
|
/* The multi-pack index that belongs to this specific packfile store. */
|
|
struct multi_pack_index *midx;
|
|
|
|
/*
|
|
* A map of packfile names to packed_git structs for tracking which
|
|
* packs have been loaded already.
|
|
*/
|
|
struct strmap packs_by_path;
|
|
|
|
/*
|
|
* Whether packfiles have already been populated with this store's
|
|
* packs.
|
|
*/
|
|
bool initialized;
|
|
|
|
/*
|
|
* Usually, packfiles will be reordered to the front of the `packs`
|
|
* list whenever an object is looked up via them. This has the effect
|
|
* that packs that contain a lot of accessed objects will be located
|
|
* towards the front.
|
|
*
|
|
* This is usually desireable, but there are exceptions. One exception
|
|
* is when the looking up multiple objects in a loop for each packfile.
|
|
* In that case, we may easily end up with an infinite loop as the
|
|
* packfiles get reordered to the front repeatedly.
|
|
*
|
|
* Setting this field to `true` thus disables these reorderings.
|
|
*/
|
|
bool skip_mru_updates;
|
|
};
|
|
|
|
/*
|
|
* Allocate and initialize a new empty packfile store for the given object
|
|
* database source.
|
|
*/
|
|
struct odb_source_packed *odb_source_packed_new(struct odb_source_files *parent);
|
|
|
|
/*
|
|
* Cast the given object database source to the packed backend. This will cause
|
|
* a BUG in case the source doesn't use this backend.
|
|
*/
|
|
static inline struct odb_source_packed *odb_source_packed_downcast(struct odb_source *source)
|
|
{
|
|
if (source->type != ODB_SOURCE_PACKED)
|
|
BUG("trying to downcast source of type '%d' to packed", source->type);
|
|
return container_of(source, struct odb_source_packed, base);
|
|
}
|
|
|
|
/*
|
|
* Prepare the source by loading packfiles and multi-pack indices for
|
|
* all alternates. This becomes a no-op if the source is already prepared.
|
|
*
|
|
* It shouldn't typically be necessary to call this function directly, as
|
|
* functions that access the source know to prepare it.
|
|
*/
|
|
void odb_source_packed_prepare(struct odb_source_packed *source);
|
|
|
|
struct pack_entry;
|
|
|
|
int find_pack_entry(struct odb_source_packed *store,
|
|
const struct object_id *oid,
|
|
struct pack_entry *e);
|
|
|
|
#endif
|