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name-hash.c: use new hash map implementation for cache entries

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Note: the "ce->next = NULL;" in unpack-trees.c::do_add_entry can safely be
removed, as ce->next (now ce->ent.next) is always properly initialized in
name-hash.c::hash_index_entry.

Signed-off-by: Karsten Blees <blees@dcon.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Karsten Blees 2013-11-14 20:21:58 +01:00 committed by Junio C Hamano
parent 1c8cca190a
commit 8b013788a1
3 changed files with 13 additions and 20 deletions
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8
cache.h
View File

@ -131,12 +131,12 @@ struct stat_data {
};
struct cache_entry {
struct hashmap_entry ent;
struct stat_data ce_stat_data;
unsigned int ce_mode;
unsigned int ce_flags;
unsigned int ce_namelen;
unsigned char sha1[20];
struct cache_entry *next;
char name[FLEX_ARRAY]; /* more */
};
@ -203,7 +203,9 @@ static inline void copy_cache_entry(struct cache_entry *dst,
unsigned int state = dst->ce_flags & CE_STATE_MASK;
/* Don't copy hash chain and name */
memcpy(dst, src, offsetof(struct cache_entry, next));
memcpy(&dst->ce_stat_data, &src->ce_stat_data,
offsetof(struct cache_entry, name) -
offsetof(struct cache_entry, ce_stat_data));
/* Restore the hash state */
dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
@ -278,7 +280,7 @@ struct index_state {
struct cache_time timestamp;
unsigned name_hash_initialized : 1,
initialized : 1;
struct hash_table name_hash;
struct hashmap name_hash;
struct hashmap dir_hash;
};

24
name-hash.c
View File

@ -100,19 +100,11 @@ static void remove_dir_entry(struct index_state *istate, struct cache_entry *ce)
static void hash_index_entry(struct index_state *istate, struct cache_entry *ce)
{
void **pos;
unsigned int hash;
if (ce->ce_flags & CE_HASHED)
return;
ce->ce_flags |= CE_HASHED;
ce->next = NULL;
hash = memihash(ce->name, ce_namelen(ce));
pos = insert_hash(hash, ce, &istate->name_hash);
if (pos) {
ce->next = *pos;
*pos = ce;
}
hashmap_entry_init(ce, memihash(ce->name, ce_namelen(ce)));
hashmap_add(&istate->name_hash, ce);
if (ignore_case && !(ce->ce_flags & CE_UNHASHED))
add_dir_entry(istate, ce);
@ -124,8 +116,7 @@ static void lazy_init_name_hash(struct index_state *istate)
if (istate->name_hash_initialized)
return;
if (istate->cache_nr)
preallocate_hash(&istate->name_hash, istate->cache_nr);
hashmap_init(&istate->name_hash, NULL, istate->cache_nr);
hashmap_init(&istate->dir_hash, (hashmap_cmp_fn) dir_entry_cmp, 0);
for (nr = 0; nr < istate->cache_nr; nr++)
hash_index_entry(istate, istate->cache[nr]);
@ -221,18 +212,19 @@ struct cache_entry *index_dir_exists(struct index_state *istate, const char *nam
struct cache_entry *index_file_exists(struct index_state *istate, const char *name, int namelen, int icase)
{
unsigned int hash = memihash(name, namelen);
struct cache_entry *ce;
struct hashmap_entry key;
lazy_init_name_hash(istate);
ce = lookup_hash(hash, &istate->name_hash);
hashmap_entry_init(&key, memihash(name, namelen));
ce = hashmap_get(&istate->name_hash, &key, NULL);
while (ce) {
if (!(ce->ce_flags & CE_UNHASHED)) {
if (same_name(ce, name, namelen, icase))
return ce;
}
ce = ce->next;
ce = hashmap_get_next(&istate->name_hash, ce);
}
return NULL;
}
@ -250,6 +242,6 @@ void free_name_hash(struct index_state *istate)
return;
istate->name_hash_initialized = 0;
free_hash(&istate->name_hash);
hashmap_free(&istate->name_hash, 0);
hashmap_free(&istate->dir_hash, 1);
}

1
unpack-trees.c
View File

@ -110,7 +110,6 @@ static void do_add_entry(struct unpack_trees_options *o, struct cache_entry *ce,
if (set & CE_REMOVE)
set |= CE_WT_REMOVE;
ce->next = NULL;
ce->ce_flags = (ce->ce_flags & ~clear) | set;
add_index_entry(&o->result, ce,
ADD_CACHE_OK_TO_ADD | ADD_CACHE_OK_TO_REPLACE);