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-rw-r--r--erts/emulator/beam/bif.tab2
-rw-r--r--erts/emulator/beam/erl_db.c25
-rw-r--r--erts/emulator/beam/erl_db_hash.c83
-rw-r--r--erts/emulator/beam/erl_db_tree.c24
-rw-r--r--erts/emulator/beam/erl_db_util.h1
5 files changed, 120 insertions, 15 deletions
diff --git a/erts/emulator/beam/bif.tab b/erts/emulator/beam/bif.tab
index fbdddf09db..fe25b2d27c 100644
--- a/erts/emulator/beam/bif.tab
+++ b/erts/emulator/beam/bif.tab
@@ -596,6 +596,8 @@ bif maps:values/1
bif erts_internal:cmp_term/2
+bif ets:take/2
+
#
# Obsolete
#
diff --git a/erts/emulator/beam/erl_db.c b/erts/emulator/beam/erl_db.c
index 8f246ffa07..fba1e32230 100644
--- a/erts/emulator/beam/erl_db.c
+++ b/erts/emulator/beam/erl_db.c
@@ -753,6 +753,31 @@ BIF_RETTYPE ets_prev_2(BIF_ALIST_2)
BIF_RET(ret);
}
+/*
+** take(Tab, Key)
+*/
+BIF_RETTYPE ets_take_2(BIF_ALIST_2)
+{
+ DbTable* tb;
+#ifdef DEBUG
+ int cret;
+#endif
+ Eterm ret;
+ CHECK_TABLES();
+
+ tb = db_get_table(BIF_P, BIF_ARG_1, DB_WRITE, LCK_WRITE_REC);
+ if (!tb) {
+ BIF_ERROR(BIF_P, BADARG);
+ }
+#ifdef DEBUG
+ cret =
+#endif
+ tb->common.meth->db_take(BIF_P, tb, BIF_ARG_2, &ret);
+ ASSERT(cret == DB_ERROR_NONE);
+ db_unlock(tb, LCK_WRITE_REC);
+ BIF_RET(ret);
+}
+
/*
** update_element(Tab, Key, {Pos, Value})
** update_element(Tab, Key, [{Pos, Value}])
diff --git a/erts/emulator/beam/erl_db_hash.c b/erts/emulator/beam/erl_db_hash.c
index 06dac8f161..633a2272ad 100644
--- a/erts/emulator/beam/erl_db_hash.c
+++ b/erts/emulator/beam/erl_db_hash.c
@@ -426,6 +426,7 @@ static int db_select_count_continue_hash(Process *p, DbTable *tbl,
static int db_select_delete_continue_hash(Process *p, DbTable *tbl,
Eterm continuation, Eterm *ret);
+static int db_take_hash(Process *, DbTable *, Eterm, Eterm *);
static void db_print_hash(int to,
void *to_arg,
int show,
@@ -536,6 +537,7 @@ DbTableMethod db_hash =
db_select_delete_continue_hash,
db_select_count_hash,
db_select_count_continue_hash,
+ db_take_hash,
db_delete_all_objects_hash,
db_free_table_hash,
db_free_table_continue_hash,
@@ -879,34 +881,45 @@ Ldone:
return ret;
}
+static Eterm
+get_term_list(Process *p, DbTableHash *tb, Eterm key, HashValue hval,
+ HashDbTerm *b1, HashDbTerm **bend)
+{
+ HashDbTerm* b2 = b1->next;
+ Eterm copy;
+
+ if (tb->common.status & (DB_BAG | DB_DUPLICATE_BAG)) {
+ while (b2 && has_key(tb, b2, key, hval)) {
+ b2 = b2->next;
+ }
+ }
+ copy = build_term_list(p, b1, b2, tb);
+ CHECK_TABLES();
+ if (bend) {
+ *bend = b2;
+ }
+ return copy;
+}
+
int db_get_hash(Process *p, DbTable *tbl, Eterm key, Eterm *ret)
{
DbTableHash *tb = &tbl->hash;
HashValue hval;
int ix;
- HashDbTerm* b1;
+ HashDbTerm* b;
erts_smp_rwmtx_t* lck;
hval = MAKE_HASH(key);
lck = RLOCK_HASH(tb,hval);
ix = hash_to_ix(tb, hval);
- b1 = BUCKET(tb, ix);
+ b = BUCKET(tb, ix);
- while(b1 != 0) {
- if (has_live_key(tb,b1,key,hval)) {
- HashDbTerm* b2 = b1->next;
- Eterm copy;
-
- if (tb->common.status & (DB_BAG | DB_DUPLICATE_BAG)) {
- while(b2 != NULL && has_key(tb,b2,key,hval))
- b2 = b2->next;
- }
- copy = build_term_list(p, b1, b2, tb);
- CHECK_TABLES();
- *ret = copy;
+ while(b != 0) {
+ if (has_live_key(tb, b, key, hval)) {
+ *ret = get_term_list(p, tb, key, hval, b, NULL);
goto done;
}
- b1 = b1->next;
+ b = b->next;
}
*ret = NIL;
done:
@@ -2069,6 +2082,46 @@ trap:
}
+static int db_take_hash(Process *p, DbTable *tbl, Eterm key, Eterm *ret)
+{
+ DbTableHash *tb = &tbl->hash;
+ HashDbTerm **bp, *b;
+ HashValue hval = MAKE_HASH(key);
+ erts_smp_rwmtx_t *lck = WLOCK_HASH(tb, hval);
+ int ix = hash_to_ix(tb, hval);
+ int nitems_diff = 0;
+
+ *ret = NIL;
+ for (bp = &BUCKET(tb, ix), b = *bp; b; bp = &b->next, b = b->next) {
+ if (has_live_key(tb, b, key, hval)) {
+ HashDbTerm *bend;
+
+ *ret = get_term_list(p, tb, key, hval, b, &bend);
+ while (b != bend) {
+ --nitems_diff;
+ if (nitems_diff == -1 && IS_FIXED(tb)) {
+ /* Pseudo remove (no need to keep several of same key) */
+ add_fixed_deletion(tb, ix);
+ bp = &b->next;
+ b->hvalue = INVALID_HASH;
+ b = b->next;
+ } else {
+ *bp = b->next;
+ free_term(tb, b);
+ b = *bp;
+ }
+ }
+ break;
+ }
+ }
+ WUNLOCK_HASH(lck);
+ if (nitems_diff) {
+ erts_smp_atomic_add_nob(&tb->common.nitems, nitems_diff);
+ try_shrink(tb);
+ }
+ return DB_ERROR_NONE;
+}
+
/*
** Other interface routines (not directly coupled to one bif)
*/
diff --git a/erts/emulator/beam/erl_db_tree.c b/erts/emulator/beam/erl_db_tree.c
index a62a83a928..720c0659c3 100644
--- a/erts/emulator/beam/erl_db_tree.c
+++ b/erts/emulator/beam/erl_db_tree.c
@@ -383,6 +383,7 @@ static int db_select_delete_tree(Process *p, DbTable *tbl,
Eterm pattern, Eterm *ret);
static int db_select_delete_continue_tree(Process *p, DbTable *tbl,
Eterm continuation, Eterm *ret);
+static int db_take_tree(Process *, DbTable *, Eterm, Eterm *);
static void db_print_tree(int to, void *to_arg,
int show, DbTable *tbl);
static int db_free_table_tree(DbTable *tbl);
@@ -431,6 +432,7 @@ DbTableMethod db_tree =
db_select_delete_continue_tree,
db_select_count_tree,
db_select_count_continue_tree,
+ db_take_tree,
db_delete_all_objects_tree,
db_free_table_tree,
db_free_table_continue_tree,
@@ -1722,6 +1724,28 @@ static int db_select_delete_tree(Process *p, DbTable *tbl,
}
+static int db_take_tree(Process *p, DbTable *tbl, Eterm key, Eterm *ret)
+{
+ DbTableTree *tb = &tbl->tree;
+ TreeDbTerm *this;
+
+ *ret = NIL;
+ this = linkout_tree(tb, key, NULL);
+ if (this) {
+ Eterm copy, *hp, *hend;
+
+ hp = HAlloc(p, this->dbterm.size + 2);
+ hend = hp + this->dbterm.size + 2;
+ copy = db_copy_object_from_ets(&tb->common,
+ &this->dbterm, &hp, &MSO(p));
+ *ret = CONS(hp, copy, NIL);
+ hp += 2;
+ HRelease(p, hend, hp);
+ free_term(tb, this);
+ }
+ return DB_ERROR_NONE;
+}
+
/*
** Other interface routines (not directly coupled to one bif)
*/
diff --git a/erts/emulator/beam/erl_db_util.h b/erts/emulator/beam/erl_db_util.h
index 328b19dfc9..5ace93c8ed 100644
--- a/erts/emulator/beam/erl_db_util.h
+++ b/erts/emulator/beam/erl_db_util.h
@@ -165,6 +165,7 @@ typedef struct db_table_method
DbTable* tb, /* [in out] */
Eterm continuation,
Eterm* ret);
+ int (*db_take)(Process *, DbTable *, Eterm, Eterm *);
int (*db_delete_all_objects)(Process* p,
DbTable* db /* [in out] */ );
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-04 09:08:05 +0000