pack-objects: convert packlist_find() to use object_id
authorJeff King <peff@peff.net>
Thu, 20 Jun 2019 07:41:03 +0000 (03:41 -0400)
committerJunio C Hamano <gitster@pobox.com>
Thu, 20 Jun 2019 16:54:58 +0000 (09:54 -0700)
We take a raw hash pointer, but most of our callers have a "struct
object_id" already. Let's switch to taking the full struct, which will
let us continue removing uses of raw sha1 buffers.

There are two callers that do need special attention:

  - in rebuild_existing_bitmaps(), we need to switch to
    nth_packed_object_oid(). This incurs an extra hash copy over
    pointing straight to the mmap'd sha1, but it shouldn't be measurable
    compared to the rest of the operation.

  - in can_reuse_delta() we already spent the effort to copy the sha1
    into a "struct object_id", but now we just have to do so a little
    earlier in the function (we can't easily convert that function's
    callers because they may be pointing at mmap'd REF_DELTA blocks).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
builtin/pack-objects.c
pack-bitmap-write.c
pack-bitmap.c
pack-objects.c
pack-objects.h

index b2be886..c95693f 100644 (file)
@@ -606,12 +606,12 @@ static int mark_tagged(const char *path, const struct object_id *oid, int flag,
                       void *cb_data)
 {
        struct object_id peeled;
-       struct object_entry *entry = packlist_find(&to_pack, oid->hash, NULL);
+       struct object_entry *entry = packlist_find(&to_pack, oid, NULL);
 
        if (entry)
                entry->tagged = 1;
        if (!peel_ref(path, &peeled)) {
-               entry = packlist_find(&to_pack, peeled.hash, NULL);
+               entry = packlist_find(&to_pack, &peeled, NULL);
                if (entry)
                        entry->tagged = 1;
        }
@@ -996,7 +996,7 @@ static int have_duplicate_entry(const struct object_id *oid,
 {
        struct object_entry *entry;
 
-       entry = packlist_find(&to_pack, oid->hash, index_pos);
+       entry = packlist_find(&to_pack, oid, index_pos);
        if (!entry)
                return 0;
 
@@ -1494,11 +1494,13 @@ static int can_reuse_delta(const unsigned char *base_sha1,
        if (!base_sha1)
                return 0;
 
+       oidread(&base_oid, base_sha1);
+
        /*
         * First see if we're already sending the base (or it's explicitly in
         * our "excluded" list).
         */
-       base = packlist_find(&to_pack, base_sha1, NULL);
+       base = packlist_find(&to_pack, &base_oid, NULL);
        if (base) {
                if (!in_same_island(&delta->idx.oid, &base->idx.oid))
                        return 0;
@@ -1511,7 +1513,6 @@ static int can_reuse_delta(const unsigned char *base_sha1,
         * even if it was buried too deep in history to make it into the
         * packing list.
         */
-       oidread(&base_oid, base_sha1);
        if (thin && bitmap_has_oid_in_uninteresting(bitmap_git, &base_oid)) {
                if (use_delta_islands) {
                        if (!in_same_island(&delta->idx.oid, &base_oid))
@@ -2571,7 +2572,7 @@ static void add_tag_chain(const struct object_id *oid)
         * it was included via bitmaps, we would not have parsed it
         * previously).
         */
-       if (packlist_find(&to_pack, oid->hash, NULL))
+       if (packlist_find(&to_pack, oid, NULL))
                return;
 
        tag = lookup_tag(the_repository, oid);
@@ -2595,7 +2596,7 @@ static int add_ref_tag(const char *path, const struct object_id *oid, int flag,
 
        if (starts_with(path, "refs/tags/") && /* is a tag? */
            !peel_ref(path, &peeled)    && /* peelable? */
-           packlist_find(&to_pack, peeled.hash, NULL))      /* object packed? */
+           packlist_find(&to_pack, &peeled, NULL))      /* object packed? */
                add_tag_chain(oid);
        return 0;
 }
@@ -2795,7 +2796,7 @@ static void show_object(struct object *obj, const char *name, void *data)
                for (p = strchr(name, '/'); p; p = strchr(p + 1, '/'))
                        depth++;
 
-               ent = packlist_find(&to_pack, obj->oid.hash, NULL);
+               ent = packlist_find(&to_pack, &obj->oid, NULL);
                if (ent && depth > oe_tree_depth(&to_pack, ent))
                        oe_set_tree_depth(&to_pack, ent, depth);
        }
@@ -3026,7 +3027,7 @@ static void loosen_unused_packed_objects(void)
 
                for (i = 0; i < p->num_objects; i++) {
                        nth_packed_object_oid(&oid, p, i);
-                       if (!packlist_find(&to_pack, oid.hash, NULL) &&
+                       if (!packlist_find(&to_pack, &oid, NULL) &&
                            !has_sha1_pack_kept_or_nonlocal(&oid) &&
                            !loosened_object_can_be_discarded(&oid, p->mtime))
                                if (force_object_loose(&oid, p->mtime))
index 59aa201..0637378 100644 (file)
@@ -144,7 +144,7 @@ static inline void reset_all_seen(void)
 
 static uint32_t find_object_pos(const struct object_id *oid)
 {
-       struct object_entry *entry = packlist_find(writer.to_pack, oid->hash, NULL);
+       struct object_entry *entry = packlist_find(writer.to_pack, oid, NULL);
 
        if (!entry) {
                die("Failed to write bitmap index. Packfile doesn't have full closure "
index 6069b2f..ff1f07e 100644 (file)
@@ -1057,13 +1057,13 @@ int rebuild_existing_bitmaps(struct bitmap_index *bitmap_git,
        reposition = xcalloc(num_objects, sizeof(uint32_t));
 
        for (i = 0; i < num_objects; ++i) {
-               const unsigned char *sha1;
+               struct object_id oid;
                struct revindex_entry *entry;
                struct object_entry *oe;
 
                entry = &bitmap_git->pack->revindex[i];
-               sha1 = nth_packed_object_sha1(bitmap_git->pack, entry->nr);
-               oe = packlist_find(mapping, sha1, NULL);
+               nth_packed_object_oid(&oid, bitmap_git->pack, entry->nr);
+               oe = packlist_find(mapping, &oid, NULL);
 
                if (oe)
                        reposition[i] = oe_in_pack_pos(mapping, oe) + 1;
index ce33b89..49fdf52 100644 (file)
@@ -68,7 +68,7 @@ static void rehash_objects(struct packing_data *pdata)
 }
 
 struct object_entry *packlist_find(struct packing_data *pdata,
-                                  const unsigned char *sha1,
+                                  const struct object_id *oid,
                                   uint32_t *index_pos)
 {
        uint32_t i;
@@ -77,7 +77,7 @@ struct object_entry *packlist_find(struct packing_data *pdata,
        if (!pdata->index_size)
                return NULL;
 
-       i = locate_object_entry_hash(pdata, sha1, &found);
+       i = locate_object_entry_hash(pdata, oid->hash, &found);
 
        if (index_pos)
                *index_pos = i;
index 6fde7ce..857d438 100644 (file)
@@ -187,7 +187,7 @@ struct object_entry *packlist_alloc(struct packing_data *pdata,
                                    uint32_t index_pos);
 
 struct object_entry *packlist_find(struct packing_data *pdata,
-                                  const unsigned char *sha1,
+                                  const struct object_id *oid,
                                   uint32_t *index_pos);
 
 static inline uint32_t pack_name_hash(const char *name)