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authorNguyễn Thái Ngọc Duy <pclouds@gmail.com>2013-07-09 15:29:00 (GMT)
committerJunio C Hamano <gitster@pobox.com>2013-07-09 16:12:48 (GMT)
commit9c5e6c802cde9881785b7f1b3278b97be4aabd82 (patch)
tree2eeb9fb013fffc711464d83141690fde1c72ce82 /cache-tree.h
parentf8abaebab3fe1a1b873f9636ea410ac4007c8fa8 (diff)
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Convert "struct cache_entry *" to "const ..." wherever possible
I attempted to make index_state->cache[] a "const struct cache_entry **" to find out how existing entries in index are modified and where. The question I have is what do we do if we really need to keep track of on-disk changes in the index. The result is - diff-lib.c: setting CE_UPTODATE - name-hash.c: setting CE_HASHED - preload-index.c, read-cache.c, unpack-trees.c and builtin/update-index: obvious - entry.c: write_entry() may refresh the checked out entry via fill_stat_cache_info(). This causes "non-const struct cache_entry *" in builtin/apply.c, builtin/checkout-index.c and builtin/checkout.c - builtin/ls-files.c: --with-tree changes stagemask and may set CE_UPDATE Of these, write_entry() and its call sites are probably most interesting because it modifies on-disk info. But this is stat info and can be retrieved via refresh, at least for porcelain commands. Other just uses ce_flags for local purposes. So, keeping track of "dirty" entries is just a matter of setting a flag in index modification functions exposed by read-cache.c. Except unpack-trees, the rest of the code base does not do anything funny behind read-cache's back. The actual patch is less valueable than the summary above. But if anyone wants to re-identify the above sites. Applying this patch, then this: diff --git a/cache.h b/cache.h index 430d021..1692891 100644 --- a/cache.h +++ b/cache.h @@ -267,7 +267,7 @@ static inline unsigned int canon_mode(unsigned int mode) #define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1) struct index_state { - struct cache_entry **cache; + const struct cache_entry **cache; unsigned int version; unsigned int cache_nr, cache_alloc, cache_changed; struct string_list *resolve_undo; will help quickly identify them without bogus warnings. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'cache-tree.h')
-rw-r--r--cache-tree.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/cache-tree.h b/cache-tree.h
index 55d0f59..f1923ad 100644
--- a/cache-tree.h
+++ b/cache-tree.h
@@ -30,7 +30,7 @@ void cache_tree_write(struct strbuf *, struct cache_tree *root);
struct cache_tree *cache_tree_read(const char *buffer, unsigned long size);
int cache_tree_fully_valid(struct cache_tree *);
-int cache_tree_update(struct cache_tree *, struct cache_entry **, int, int);
+int cache_tree_update(struct cache_tree *, const struct cache_entry * const *, int, int);
int update_main_cache_tree(int);