path: root/object-refs.c
AgeCommit message (Collapse)Author
2007-06-07War on whitespaceJunio C Hamano
This uses "git-apply --whitespace=strip" to fix whitespace errors that have crept in to our source files over time. There are a few files that need to have trailing whitespaces (most notably, test vectors). The results still passes the test, and build result in Documentation/ area is unchanged. Signed-off-by: Junio C Hamano <>
2007-04-16Add a generic "object decorator" interface, and make object refs use itLinus Torvalds
This allows you to add an arbitrary "decoration" of your choice to any object. It's a space- and time-efficient way to add information to arbitrary objects, especially if most objects probably do not have the decoration. Signed-off-by: Linus Torvalds <> Signed-off-by: Junio C Hamano <>
2006-09-04Fix git-fsck-objects SIGSEGV/divide-by-zeroLinus Torvalds
If you try to fsck a repository that isn't entirely empty, but that has no inter-object references (ie all the objects are blobs, and don't refer to anything else), git-fsck-objects currently fails. This probably cannot happen in practice, but can be tested with something like git init-db touch dummy git add dummy git fsck-objects where the fsck will die by a divide-by-zero when it tries to look up the references from the one object it found (hash_obj() will do a modulus by refs_hash_size). On some other archiectures (ppc, sparc) the divide-by-zero will go unnoticed, and we'll instead SIGSEGV when we hit the "refs_hash[j]" access. So move the test that should protect against this from mark_reachable() into lookup_object_refs(), which incidentally in the process also fixes mark_reachable() itself (it used to not mark the one object that _was_ reachable, because it decided that it had no refs too early). Signed-off-by: Linus Torvalds <> Signed-off-by: Junio C Hamano <>
2006-08-28Use xcalloc instead of callocJonas Fonseca
Signed-off-by: Jonas Fonseca <> Signed-off-by: Junio C Hamano <>
2006-06-21Fix grow_refs_hash()Linus Torvalds
Earlier commit 3e4339e6f96e8c4f38a9c6607b98d3e96a2ed783 had a thinko that did not check for collisions while repopulating the objects in the new hash table. Signed-off-by: Linus Torvalds <> Signed-off-by: Junio C Hamano <>
2006-06-21object-refs: avoid division by zeroAndre Noll
Currently, we don't check refs_hash_size size and happily call lookup_object_refs() even if refs_hash_size is zero which leads to a division by zero in hash_obj(). Signed-off-by: Andre Noll <> Signed-off-by: Junio C Hamano <>
2006-06-18Remove "refs" field from "struct object"Linus Torvalds
This shrinks "struct object" to the absolutely minimal size possible. It now contains /only/ the object flags and the SHA1 hash name of the object. The "refs" field, which is really needed only for fsck, is maintained in a separate hashed lookup-table, allowing all normal users to totally ignore it. This helps memory usage, although not as much as I hoped: it looks like the allocation overhead of malloc (and the alignment constraints in particular) means that while the structure size shrinks, the actual allocation overhead mostly does not. [ That said: memory usage is actually down, but not as much as it should be: I suspect just one of the object types actually ended up shrinking its effective allocation size. To get to the next level, we probably need specialized allocators that don't pad the allocation more than necessary. ] The separation makes for some code cleanup, though, and makes the ref tracking that fsck wants a clearly separate thing. Signed-off-by: Linus Torvalds <> Signed-off-by: Junio C Hamano <>