The unpack_entry_gently function currently has only two callers:
the delta base resolution in sha1_file.c and the main loop of
pack-check.c. Both of these must change to using unpack_entry
directly when we implement sliding window mmap logic, so I'm doing
it earlier to help break down the change set.
This may cause a slight performance decrease for delta base
resolution as well as for pack-check.c's verify_packfile(), as
the pack use counter will be incremented and decremented for every
object that is unpacked.
Signed-off-by: Shawn O. Pearce <spearce@xxxxxxxxxxx>
---
cache.h | 2 +-
pack-check.c | 2 +-
sha1_file.c | 33 ++++++++++++---------------------
3 files changed, 14 insertions(+), 23 deletions(-)
diff --git a/cache.h b/cache.h
index 4943056..38db1bf 100644
--- a/cache.h
+++ b/cache.h
@@ -394,7 +394,7 @@ extern struct packed_git *add_packed_git(char *, int, int);
extern int num_packed_objects(const struct packed_git *p);
extern int nth_packed_object_sha1(const struct packed_git *, int, unsigned char*);
extern unsigned long find_pack_entry_one(const unsigned char *, struct packed_git *);
-extern void *unpack_entry_gently(struct packed_git *, unsigned long, char *, unsigned long *);
+extern void *unpack_entry(struct packed_git *, unsigned long, char *, unsigned long *);
extern unsigned long unpack_object_header_gently(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
extern void packed_object_info_detail(struct packed_git *, unsigned long, char *, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
diff --git a/pack-check.c b/pack-check.c
index c0caaee..491bad2 100644
--- a/pack-check.c
+++ b/pack-check.c
@@ -51,7 +51,7 @@ static int verify_packfile(struct packed_git *p)
offset = find_pack_entry_one(sha1, p);
if (!offset)
die("internal error pack-check find-pack-entry-one");
- data = unpack_entry_gently(p, offset, type, &size);
+ data = unpack_entry(p, offset, type, &size);
if (!data) {
err = error("cannot unpack %s from %s",
sha1_to_hex(sha1), p->pack_name);
diff --git a/sha1_file.c b/sha1_file.c
index 1c4df5b..4824a5d 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1110,7 +1110,7 @@ static void *unpack_delta_entry(struct packed_git *p,
unsigned long result_size, base_size, base_offset;
offset = get_delta_base(p, offset, kind, obj_offset, &base_offset);
- base = unpack_entry_gently(p, base_offset, type, &base_size);
+ base = unpack_entry(p, base_offset, type, &base_size);
if (!base)
die("failed to read delta base object at %lu from %s",
base_offset, p->pack_name);
@@ -1127,43 +1127,34 @@ static void *unpack_delta_entry(struct packed_git *p,
return result;
}
-static void *unpack_entry(struct pack_entry *entry,
+void *unpack_entry(struct packed_git *p, unsigned long offset,
char *type, unsigned long *sizep)
{
- struct packed_git *p = entry->p;
+ unsigned long size, obj_offset = offset;
+ enum object_type kind;
void *retval;
if (use_packed_git(p))
die("cannot map packed file");
- retval = unpack_entry_gently(p, entry->offset, type, sizep);
- unuse_packed_git(p);
- if (!retval)
- die("corrupted pack file %s", p->pack_name);
- return retval;
-}
-
-/* The caller is responsible for use_packed_git()/unuse_packed_git() pair */
-void *unpack_entry_gently(struct packed_git *p, unsigned long offset,
- char *type, unsigned long *sizep)
-{
- unsigned long size, obj_offset = offset;
- enum object_type kind;
-
offset = unpack_object_header(p, offset, &kind, &size);
switch (kind) {
case OBJ_OFS_DELTA:
case OBJ_REF_DELTA:
- return unpack_delta_entry(p, offset, size, kind, obj_offset, type, sizep);
+ retval = unpack_delta_entry(p, offset, size, kind, obj_offset, type, sizep);
+ break;
case OBJ_COMMIT:
case OBJ_TREE:
case OBJ_BLOB:
case OBJ_TAG:
strcpy(type, type_names[kind]);
*sizep = size;
- return unpack_compressed_entry(p, offset, size);
+ retval = unpack_compressed_entry(p, offset, size);
+ break;
default:
- return NULL;
+ die("unknown object type %i in %s", kind, p->pack_name);
}
+ unuse_packed_git(p);
+ return retval;
}
int num_packed_objects(const struct packed_git *p)
@@ -1312,7 +1303,7 @@ static void *read_packed_sha1(const unsigned char *sha1, char *type, unsigned lo
error("cannot read sha1_file for %s", sha1_to_hex(sha1));
return NULL;
}
- return unpack_entry(&e, type, size);
+ return unpack_entry(e.p, e.offset, type, size);
}
void * read_sha1_file(const unsigned char *sha1, char *type, unsigned long *size)
--
1.4.4.3.g87d8
-
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