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| author | Allan McRae <allan@archlinux.org> | 2011-01-30 13:42:45 +0100 |
|---|---|---|
| committer | Allan McRae <allan@archlinux.org> | 2011-02-04 00:55:45 +0100 |
| commit | 01c3c7e4f28d837f0b8a6aaaf27d16894d4b762d (patch) | |
| tree | dce1eecbcc7961ac318d7732e14dd9ded075048c /lib/libalpm | |
| parent | 11e5e86151f83219b1cedbca31be7530911e25eb (diff) | |
| download | pacman-01c3c7e4f28d837f0b8a6aaaf27d16894d4b762d.tar.gz pacman-01c3c7e4f28d837f0b8a6aaaf27d16894d4b762d.tar.xz | |
Actually remove packages from pkghash on removal
Fully removes a package from the hash. Also unify prototype with
removal from an alpm_list_t, fixing issues when removing a package
from the pkgcache.
Signed-off-by: Allan McRae <allan@archlinux.org>
Diffstat (limited to 'lib/libalpm')
| -rw-r--r-- | lib/libalpm/db.c | 2 | ||||
| -rw-r--r-- | lib/libalpm/pkghash.c | 37 | ||||
| -rw-r--r-- | lib/libalpm/pkghash.h | 2 |
3 files changed, 31 insertions, 10 deletions
diff --git a/lib/libalpm/db.c b/lib/libalpm/db.c index c0c2f0ca..02f82823 100644 --- a/lib/libalpm/db.c +++ b/lib/libalpm/db.c @@ -617,7 +617,7 @@ int _alpm_db_remove_pkgfromcache(pmdb_t *db, pmpkg_t *pkg) _alpm_log(PM_LOG_DEBUG, "removing entry '%s' from '%s' cache\n", alpm_pkg_get_name(pkg), db->treename); - db->pkgcache = _alpm_pkghash_remove(db->pkgcache, pkg, data); + db->pkgcache = _alpm_pkghash_remove(db->pkgcache, pkg, &data); if(data == NULL) { /* package not found */ _alpm_log(PM_LOG_DEBUG, "cannot remove entry '%s' from '%s' cache: not found\n", diff --git a/lib/libalpm/pkghash.c b/lib/libalpm/pkghash.c index bdff78ea..14056e37 100644 --- a/lib/libalpm/pkghash.c +++ b/lib/libalpm/pkghash.c @@ -219,11 +219,15 @@ pmpkghash_t *_alpm_pkghash_add_sorted(pmpkghash_t *hash, pmpkg_t *pkg) * * @return the resultant hash */ -pmpkghash_t *_alpm_pkghash_remove(pmpkghash_t *hash, pmpkg_t *pkg, pmpkg_t *data) +pmpkghash_t *_alpm_pkghash_remove(pmpkghash_t *hash, pmpkg_t *pkg, pmpkg_t **data) { alpm_list_t *i; size_t position; + if(data) { + *data = NULL; + } + if(pkg == NULL || hash == NULL) { return(hash); } @@ -235,7 +239,6 @@ pmpkghash_t *_alpm_pkghash_remove(pmpkghash_t *hash, pmpkg_t *pkg, pmpkg_t *data if(info->name_hash == pkg->name_hash && strcmp(info->name, pkg->name) == 0) { -#if 0 /* Actually removing items is not a good idea with linear probing... */ /* remove from list */ /* TODO - refactor with alpm_list_remove */ if(i == hash->list) { @@ -266,16 +269,34 @@ pmpkghash_t *_alpm_pkghash_remove(pmpkghash_t *hash, pmpkg_t *pkg, pmpkg_t *data } /* remove from hash */ - data = info; - info = NULL; + if(data) { + *data = info; + } + hash->hash_table[position] = NULL; free(i); - i = NULL; hash->entries -= 1; -#endif - /* fake removal - pkgname can not be blank so 0 hash is impossible */ - info->name_hash = 0; + /* potentially move entries following removed entry to keep + * open addressing collision resolution working */ + size_t next_null = (position + 1) % hash->buckets; + while(hash->hash_table[next_null] != NULL) { + next_null = (next_null + 1) % hash->buckets; + } + + position = (position + 1) % hash->buckets; + + while((i = hash->hash_table[position]) != NULL) { + info = i->data; + size_t new_position = get_hash_position(info->name_hash, hash); + + if(new_position != next_null) { + hash->hash_table[new_position] = i; + hash->hash_table[position] = NULL; + } + + position = (position + 1) % hash->buckets; + } return(hash); } diff --git a/lib/libalpm/pkghash.h b/lib/libalpm/pkghash.h index 7f90cb17..a6c1db71 100644 --- a/lib/libalpm/pkghash.h +++ b/lib/libalpm/pkghash.h @@ -47,7 +47,7 @@ pmpkghash_t *_alpm_pkghash_create(size_t size); pmpkghash_t *_alpm_pkghash_add(pmpkghash_t *hash, pmpkg_t *pkg); pmpkghash_t *_alpm_pkghash_add_sorted(pmpkghash_t *hash, pmpkg_t *pkg); -pmpkghash_t *_alpm_pkghash_remove(pmpkghash_t *hash, pmpkg_t *pkg, pmpkg_t *data); +pmpkghash_t *_alpm_pkghash_remove(pmpkghash_t *hash, pmpkg_t *pkg, pmpkg_t **data); void _alpm_pkghash_free(pmpkghash_t *hash); |