@@ -2857,8 +2857,8 @@ expectation_clean(struct conntrack *ct, const struct conn_key *parent_key)
{
ovs_rwlock_wrlock(&ct->resources_lock);
- struct alg_exp_node *node, *next;
- HINDEX_FOR_EACH_WITH_HASH_SAFE (node, next, node_ref,
+ struct alg_exp_node *node;
+ HINDEX_FOR_EACH_WITH_HASH_SAFE (node, node_ref,
conn_key_hash(parent_key, ct->hash_basis),
&ct->alg_expectation_refs) {
if (!conn_key_cmp(&node->parent_key, parent_key)) {
@@ -134,15 +134,31 @@ void hindex_remove(struct hindex *, struct hindex_node *);
/* Safe when NODE may be freed (not needed when NODE may be removed from the
* hash map but its members remain accessible and intact). */
-#define HINDEX_FOR_EACH_WITH_HASH_SAFE(NODE, NEXT, MEMBER, HASH, HINDEX) \
- for (INIT_MULTIVAR_SAFE_LONG(NODE, NEXT, MEMBER, \
- hindex_node_with_hash(HINDEX, HASH)); \
- CONDITION_MULTIVAR_SAFE_LONG(NODE, NEXT, MEMBER, \
- ITER_VAR(NODE) != NULL, \
- ITER_VAR(NEXT) = ITER_VAR(NODE)->s, \
- ITER_VAR(NEXT) != NULL); \
+#define HINDEX_FOR_EACH_WITH_HASH_SAFE_LONG(NODE, NEXT, MEMBER, HASH, HINDEX) \
+ for (INIT_MULTIVAR_SAFE_LONG(NODE, NEXT, MEMBER, \
+ hindex_node_with_hash(HINDEX, HASH)); \
+ CONDITION_MULTIVAR_SAFE_LONG(NODE, NEXT, MEMBER, \
+ ITER_VAR(NODE) != NULL, \
+ ITER_VAR(NEXT) = ITER_VAR(NODE)->s, \
+ ITER_VAR(NEXT) != NULL); \
UPDATE_MULTIVAR_SAFE_LONG(NODE, NEXT))
+/* Short version of HINDEX_FOR_EACH_WITH_HASH_SAFE */
+#define HINDEX_FOR_EACH_WITH_HASH_SAFE_SHORT(NODE, MEMBER, HASH, HINDEX) \
+ for (INIT_MULTIVAR_SAFE_SHORT(NODE, MEMBER, \
+ hindex_node_with_hash(HINDEX, HASH)); \
+ CONDITION_MULTIVAR_SAFE_SHORT(NODE, MEMBER, \
+ ITER_VAR(NODE) != NULL, \
+ ITER_NEXT_VAR(NODE) = ITER_VAR(NODE)->s); \
+ UPDATE_MULTIVAR_SAFE_SHORT(NODE))
+
+#define HINDEX_GET_SAFE_MACRO_WITH_HASH(_1, _2, _3, _4, _5, NAME, ...) NAME
+#define HINDEX_FOR_EACH_WITH_HASH_SAFE(...) \
+ HINDEX_GET_SAFE_MACRO_WITH_HASH(__VA_ARGS__, \
+ HINDEX_FOR_EACH_WITH_HASH_SAFE_LONG, \
+ HINDEX_FOR_EACH_WITH_HASH_SAFE_SHORT)(__VA_ARGS__)
+
+
/* Returns the head node in 'hindex' with the given 'hash', or a null pointer
* if no nodes have that hash value. */
static inline struct hindex_node *
@@ -167,7 +183,7 @@ hindex_node_with_hash(const struct hindex *hindex, size_t hash)
/* Safe when NODE may be freed (not needed when NODE may be removed from the
* hash index but its members remain accessible and intact). */
-#define HINDEX_FOR_EACH_SAFE(NODE, NEXT, MEMBER, HINDEX) \
+#define HINDEX_FOR_EACH_SAFE_LONG(NODE, NEXT, MEMBER, HINDEX) \
for (INIT_MULTIVAR_SAFE_LONG(NODE, NEXT, MEMBER, hindex_first(HINDEX)); \
CONDITION_MULTIVAR_SAFE_LONG(NODE, NEXT, MEMBER, \
ITER_VAR(NODE) != NULL, \
@@ -175,6 +191,20 @@ hindex_node_with_hash(const struct hindex *hindex, size_t hash)
ITER_VAR(NEXT) != NULL); \
UPDATE_MULTIVAR_SAFE_LONG(NODE, NEXT))
+/* Short version of HINDEX_FOR_EACH_SAFE */
+#define HINDEX_FOR_EACH_SAFE_SHORT(NODE, MEMBER, HINDEX) \
+ for (INIT_MULTIVAR_SAFE_SHORT(NODE, MEMBER, hindex_first(HINDEX)); \
+ CONDITION_MULTIVAR_SAFE_SHORT(NODE, MEMBER, \
+ ITER_VAR(NODE) != NULL, \
+ ITER_NEXT_VAR(NODE) = hindex_next(HINDEX, ITER_VAR(NODE))); \
+ UPDATE_MULTIVAR_SAFE_SHORT(NODE))
+
+#define HINDEX_GET_SAFE_MACRO(_1, _2, _3, _4, NAME, ...) NAME
+#define HINDEX_FOR_EACH_SAFE(...) \
+ HINDEX_GET_SAFE_MACRO(__VA_ARGS__, \
+ HINDEX_FOR_EACH_SAFE_LONG, \
+ HINDEX_FOR_EACH_SAFE_SHORT)(__VA_ARGS__)
+
struct hindex_node *hindex_first(const struct hindex *);
struct hindex_node *hindex_next(const struct hindex *,
const struct hindex_node *);
@@ -288,6 +288,37 @@ test_hindex_for_each_safe(hash_func *hash)
assert(i == n);
assert(next == NULL);
+ for (i = 0; i < n; i++) {
+ if (pattern & (1ul << i)) {
+ n_remaining++;
+ }
+ }
+ assert(n == n_remaining);
+ hindex_destroy(&hindex);
+
+ /* Test short version (without the next variable). */
+ make_hindex(&hindex, elements, values, n, hash);
+
+ i = 0;
+ n_remaining = n;
+ HINDEX_FOR_EACH_SAFE (e, node, &hindex) {
+ assert(i < n);
+ if (pattern & (1ul << e->value)) {
+ size_t j;
+ hindex_remove(&hindex, &e->node);
+ for (j = 0; ; j++) {
+ assert(j < n_remaining);
+ if (values[j] == e->value) {
+ values[j] = values[--n_remaining];
+ break;
+ }
+ }
+ }
+ check_hindex(&hindex, values, n_remaining, hash);
+ i++;
+ }
+ assert(i == n);
+
for (i = 0; i < n; i++) {
if (pattern & (1ul << i)) {
n_remaining++;
Using SHORT version of the *_SAFE loops makes the code cleaner and less error prone. So, use the SHORT version and remove the extra variable when possible for HINDEX_*_SAFE. In order to be able to use both long and short versions without changing the name of the macro for all the clients, overload the existing name and select the appropriate version depending on the number of arguments. Signed-off-by: Adrian Moreno <amorenoz@redhat.com> --- lib/conntrack.c | 4 ++-- lib/hindex.h | 46 +++++++++++++++++++++++++++++++++++++-------- tests/test-hindex.c | 31 ++++++++++++++++++++++++++++++ 3 files changed, 71 insertions(+), 10 deletions(-)