object-store: move alt_odb_list and alt_odb_tail to object store

In a process with multiple repositories open, alternates should be
associated to a single repository and not shared globally. Move
alt_odb_list and alt_odb_tail into the_repository and adjust callers
to reflect this.

Now that the alternative object data base is per repository, we're
leaking its memory upon freeing a repository. The next patch plugs
this hole.

No functional change intended.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/fsck.c b/builtin/fsck.c
index b0eba4c3c96f7ff559e11d9bf18a0f65918451b1..c736a10a114e7112e7437d4798a849e8a64c8aa4 100644 (file)
--- a/builtin/fsck.c
+++ b/builtin/fsck.c
@@ -1,5 +1,6 @@
 #include "builtin.h"
 #include "cache.h"
+#include "repository.h"
 #include "config.h"
 #include "commit.h"
 #include "tree.h"
@@ -714,9 +715,12 @@ int cmd_fsck(int argc, const char **argv, const char *prefix)
                for_each_loose_object(mark_loose_for_connectivity, NULL, 0);
                for_each_packed_object(mark_packed_for_connectivity, NULL, 0);
        } else {
+               struct alternate_object_database *alt_odb_list;
+
                fsck_object_dir(get_object_directory());
 
                prepare_alt_odb();
+               alt_odb_list = the_repository->objects->alt_odb_list;
                for (alt = alt_odb_list; alt; alt = alt->next)
                        fsck_object_dir(alt->path);
 

diff --git a/object-store.h b/object-store.h
index 5002e373cddfd3e88071110148f9fcfb72f2d833..0b4db5867d248c4d0dca29701f3a78f7efc3e99d 100644 (file)
--- a/object-store.h
+++ b/object-store.h
@@ -1,7 +1,7 @@
 #ifndef OBJECT_STORE_H
 #define OBJECT_STORE_H
 
-extern struct alternate_object_database {
+struct alternate_object_database {
        struct alternate_object_database *next;
 
        /* see alt_scratch_buf() */
@@ -19,7 +19,7 @@ extern struct alternate_object_database {
        struct oid_array loose_objects_cache;
 
        char path[FLEX_ARRAY];
-} *alt_odb_list;
+};
 void prepare_alt_odb(void);
 char *compute_alternate_path(const char *path, struct strbuf *err);
 typedef int alt_odb_fn(struct alternate_object_database *, void *);
@@ -61,6 +61,9 @@ struct raw_object_store {
 
        /* Path to extra alternate object database if not NULL */
        char *alternate_db;
+
+       struct alternate_object_database *alt_odb_list;
+       struct alternate_object_database **alt_odb_tail;
 };
 
 struct raw_object_store *raw_object_store_new(void);

diff --git a/packfile.c b/packfile.c
index c6651682a78e6fd160e81ea8d80f4c5c4aaeb6fd..fdbf240f8171cbd99df21f1546aee08f86e38b20 100644 (file)
--- a/packfile.c
+++ b/packfile.c
@@ -1,6 +1,7 @@
 #include "cache.h"
 #include "list.h"
 #include "pack.h"
+#include "repository.h"
 #include "dir.h"
 #include "mergesort.h"
 #include "packfile.h"
@@ -892,7 +893,7 @@ void prepare_packed_git(void)
                return;
        prepare_packed_git_one(get_object_directory(), 1);
        prepare_alt_odb();
-       for (alt = alt_odb_list; alt; alt = alt->next)
+       for (alt = the_repository->objects->alt_odb_list; alt; alt = alt->next)
                prepare_packed_git_one(alt->path, 0);
        rearrange_packed_git();
        prepare_packed_git_mru();

diff --git a/sha1_file.c b/sha1_file.c
index af5aa83db51a460581c86f82ca293de1b84d09e2..84b361c1255bc1ca5b487b6f1fbcb0e3c5d9f9c8 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -22,6 +22,7 @@
 #include "pack-revindex.h"
 #include "sha1-lookup.h"
 #include "bulk-checkin.h"
+#include "repository.h"
 #include "streaming.h"
 #include "dir.h"
 #include "list.h"
@@ -343,9 +344,6 @@ static const char *alt_sha1_path(struct alternate_object_database *alt,
        return buf->buf;
 }
 
-struct alternate_object_database *alt_odb_list;
-static struct alternate_object_database **alt_odb_tail;
-
 /*
  * Return non-zero iff the path is usable as an alternate object database.
  */
@@ -365,7 +363,7 @@ static int alt_odb_usable(struct strbuf *path, const char *normalized_objdir)
         * Prevent the common mistake of listing the same
         * thing twice, or object directory itself.
         */
-       for (alt = alt_odb_list; alt; alt = alt->next) {
+       for (alt = the_repository->objects->alt_odb_list; alt; alt = alt->next) {
                if (!fspathcmp(path->buf, alt->path))
                        return 0;
        }
@@ -425,8 +423,8 @@ static int link_alt_odb_entry(const char *entry, const char *relative_base,
        ent = alloc_alt_odb(pathbuf.buf);
 
        /* add the alternate entry */
-       *alt_odb_tail = ent;
-       alt_odb_tail = &(ent->next);
+       *the_repository->objects->alt_odb_tail = ent;
+       the_repository->objects->alt_odb_tail = &(ent->next);
        ent->next = NULL;
 
        /* recursively add alternates */
@@ -560,7 +558,7 @@ void add_to_alternates_file(const char *reference)
                fprintf_or_die(out, "%s\n", reference);
                if (commit_lock_file(&lock))
                        die_errno("unable to move new alternates file into place");
-               if (alt_odb_tail)
+               if (the_repository->objects->alt_odb_tail)
                        link_alt_odb_entries(reference, '\n', NULL, 0);
        }
        free(alts);
@@ -658,7 +656,7 @@ int foreach_alt_odb(alt_odb_fn fn, void *cb)
        int r = 0;
 
        prepare_alt_odb();
-       for (ent = alt_odb_list; ent; ent = ent->next) {
+       for (ent = the_repository->objects->alt_odb_list; ent; ent = ent->next) {
                r = fn(ent, cb);
                if (r)
                        break;
@@ -668,10 +666,11 @@ int foreach_alt_odb(alt_odb_fn fn, void *cb)
 
 void prepare_alt_odb(void)
 {
-       if (alt_odb_tail)
+       if (the_repository->objects->alt_odb_tail)
                return;
 
-       alt_odb_tail = &alt_odb_list;
+       the_repository->objects->alt_odb_tail =
+                       &the_repository->objects->alt_odb_list;
        link_alt_odb_entries(the_repository->objects->alternate_db,
                             PATH_SEP, NULL, 0);
 
@@ -716,7 +715,7 @@ static int check_and_freshen_nonlocal(const unsigned char *sha1, int freshen)
 {
        struct alternate_object_database *alt;
        prepare_alt_odb();
-       for (alt = alt_odb_list; alt; alt = alt->next) {
+       for (alt = the_repository->objects->alt_odb_list; alt; alt = alt->next) {
                const char *path = alt_sha1_path(alt, sha1);
                if (check_and_freshen_file(path, freshen))
                        return 1;
@@ -876,7 +875,7 @@ static int stat_sha1_file(const unsigned char *sha1, struct stat *st,
 
        prepare_alt_odb();
        errno = ENOENT;
-       for (alt = alt_odb_list; alt; alt = alt->next) {
+       for (alt = the_repository->objects->alt_odb_list; alt; alt = alt->next) {
                *path = alt_sha1_path(alt, sha1);
                if (!lstat(*path, st))
                        return 0;
@@ -906,7 +905,7 @@ static int open_sha1_file(const unsigned char *sha1, const char **path)
        most_interesting_errno = errno;
 
        prepare_alt_odb();
-       for (alt = alt_odb_list; alt; alt = alt->next) {
+       for (alt = the_repository->objects->alt_odb_list; alt; alt = alt->next) {
                *path = alt_sha1_path(alt, sha1);
                fd = git_open(*path);
                if (fd >= 0)

diff --git a/sha1_name.c b/sha1_name.c
index 434025bf03b4ea919880c8a6f473dd97d464aec1..a22a29cda0503d8a3167abda2d5089c7262c9bda 100644 (file)
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -11,6 +11,7 @@
 #include "sha1-array.h"
 #include "packfile.h"
 #include "object-store.h"
+#include "repository.h"
 
 static int get_oid_oneline(const char *, struct object_id *, struct commit_list *);
 
@@ -105,7 +106,7 @@ static void find_short_object_filename(struct disambiguate_state *ds)
                 */
                fakeent = alloc_alt_odb(get_object_directory());
        }
-       fakeent->next = alt_odb_list;
+       fakeent->next = the_repository->objects->alt_odb_list;
 
        for (alt = fakeent; alt && !ds->ambiguous; alt = alt->next) {
                int pos;