diff options
| -rw-r--r-- | erts/emulator/beam/erl_db_hash.c | 1982 | ||||
| -rw-r--r-- | erts/emulator/beam/erl_db_tree.c | 3 |
2 files changed, 1010 insertions, 975 deletions
diff --git a/erts/emulator/beam/erl_db_hash.c b/erts/emulator/beam/erl_db_hash.c index 96d74bb050..1b5c8fe422 100644 --- a/erts/emulator/beam/erl_db_hash.c +++ b/erts/emulator/beam/erl_db_hash.c @@ -355,8 +355,6 @@ static ERTS_INLINE void SET_SEGTAB(DbTableHash* tb, erts_smp_atomic_set_nob(&tb->segtab, (erts_aint_t) segtab); } - - /* ** Forward decl's (static functions) */ @@ -401,23 +399,21 @@ static int db_select_chunk_hash(Process *p, DbTable *tbl, Eterm tid, int reverse, Eterm *ret); static int db_select_hash(Process *p, DbTable *tbl, Eterm tid, Eterm pattern, int reverse, Eterm *ret); -static int db_select_count_hash(Process *p, DbTable *tbl, Eterm tid, - Eterm pattern, Eterm *ret); -static int db_select_delete_hash(Process *p, DbTable *tbl, Eterm tid, - Eterm pattern, Eterm *ret); - -static int db_select_replace_hash(Process *p, DbTable *tbl, - Eterm pattern, Eterm *ret); - -static int db_select_continue_hash(Process *p, DbTable *tbl, +static int db_select_continue_hash(Process *p, DbTable *tbl, Eterm continuation, Eterm *ret); +static int db_select_count_hash(Process *p, DbTable *tbl, Eterm tid, + Eterm pattern, Eterm *ret); static int db_select_count_continue_hash(Process *p, DbTable *tbl, Eterm continuation, Eterm *ret); +static int db_select_delete_hash(Process *p, DbTable *tbl, Eterm tid, + Eterm pattern, Eterm *ret); static int db_select_delete_continue_hash(Process *p, DbTable *tbl, Eterm continuation, Eterm *ret); +static int db_select_replace_hash(Process *p, DbTable *tbl, + Eterm pattern, Eterm *ret); static int db_select_replace_continue_hash(Process *p, DbTable *tbl, Eterm continuation, Eterm *ret); @@ -1151,816 +1147,1093 @@ static BIF_RETTYPE bif_trap1(Export *bif, { BIF_TRAP1(bif, p, p1); } - + + +/* + * Match traversal callbacks + */ + +/* Called when no match is possible. + * context_ptr: Pointer to context + * ret: Pointer to traversal function term return. + * + * Both the direct return value and 'ret' are used as the traversal function return values. + */ +typedef int (*mtraversal_on_nothing_can_match_t)(void* context_ptr, Eterm* ret); + +/* Called for each match result. + * context_ptr: Pointer to context + * slot_ix: Current slot index + * current_ptr_ptr: Triple pointer to either the bucket or the 'next' pointer in the previous element; + * can be (carefully) used to adjust iteration when deleting or replacing elements. + * match_res: The result of running the match program against the current term. + * + * Should return 1 for successful match, 0 otherwise. + */ +typedef int (*mtraversal_on_match_res_t)(void* context_ptr, Sint slot_ix, HashDbTerm*** current_ptr_ptr, + Eterm match_res); + +/* Called when either we've matched enough elements in this cycle or EOT was reached. + * context_ptr: Pointer to context + * slot_ix: Current slot index + * got: How many elements have been matched so far + * iterations_left: Number of intended iterations (down from an initial max.) left in this traversal cycle + * mpp: Double pointer to the compiled match program + * ret: Pointer to traversal function term return. + * + * Both the direct return value and 'ret' are used as the traversal function return values. + * If *mpp is set to NULL, it won't be deallocated (useful for trapping.) + */ +typedef int (*mtraversal_on_loop_ended_t)(void* context_ptr, Sint slot_ix, Sint got, + Sint iterations_left, Binary** mpp, Eterm* ret); + +/* Called when it's time to trap + * context_ptr: Pointer to context + * slot_ix: Current slot index + * got: How many elements have been matched so far + * mpp: Double pointer to the compiled match program + * ret: Pointer to traversal function term return. + * + * Both the direct return value and 'ret' are used as the traversal function return values. + * If *mpp is set to NULL, it won't be deallocated (useful for trapping.) + */ +typedef int (*mtraversal_on_trap_t)(void* context_ptr, Sint slot_ix, Sint got, Binary** mpp, Eterm* ret); + /* - * Continue collecting select matches, this may happen either due to a trap - * or when the user calls ets:select/1 + * Begin hash table match traversal */ -static int db_select_continue_hash(Process *p, - DbTable *tbl, - Eterm continuation, - Eterm *ret) +static int match_traverse(Process* p, DbTableHash* tb, Eterm pattern, + Sint chunk_size, /* If 0, no chunking */ + Sint iterations_left, /* Nr. of iterations left */ + Eterm** hpp, /* Heap */ + int lock_for_write, /* Set to 1 if we're going to delete or + modify existing terms */ + mtraversal_on_nothing_can_match_t on_nothing_can_match, + mtraversal_on_match_res_t on_match_res, + mtraversal_on_loop_ended_t on_loop_ended, + mtraversal_on_trap_t on_trap, + void* context_ptr, /* State for callbacks above */ + Eterm* ret) { - DbTableHash *tb = &tbl->hash; - Sint slot_ix; - Sint save_slot_ix; - Sint chunk_size; - int all_objects; - Binary *mp; - int num_left = 1000; - HashDbTerm *current = 0; - Eterm match_list; - Eterm *hp; + Sint slot_ix = -1; /* Slot index */ + HashDbTerm** current_ptr = NULL; /* Refers to either the bucket pointer or + * the 'next' pointer in the previous term + */ + HashDbTerm* saved_current = NULL; /* Helper to avoid double skip on match */ + struct mp_info mpi; + unsigned current_list_pos = 0; /* Prefound buckets list index */ Eterm match_res; - Sint got; - Eterm *tptr; - erts_smp_rwmtx_t* lck; - -#define RET_TO_BIF(Term, State) do { *ret = (Term); return State; } while(0); + Sint got = 0; /* Matched terms counter */ + erts_smp_rwmtx_t* lck = NULL; /* Slot lock */ + int ret_value = DB_ERROR_NONE; +#ifdef ERTS_SMP + erts_smp_rwmtx_t* (*lock_hash_function)(DbTableHash*, HashValue) + = (lock_for_write ? WLOCK_HASH : RLOCK_HASH); + void (*unlock_hash_function)(erts_smp_rwmtx_t*) + = (lock_for_write ? WUNLOCK_HASH : RUNLOCK_HASH); +#else + #define lock_hash_function(tb, hval) NULL + #define unlock_hash_function(lck) ((void)lck) +#endif + Sint (*next_slot_function)(DbTableHash*, Uint, erts_smp_rwmtx_t**) + = (lock_for_write ? next_slot_w : next_slot); - /* Decode continuation. We know it's a tuple but not the arity or anything else */ + *ret = NIL; - tptr = tuple_val(continuation); + if ((ret_value = analyze_pattern(tb, pattern, &mpi)) != DB_ERROR_NONE) { + goto done; + } - if (arityval(*tptr) != 6) - RET_TO_BIF(NIL,DB_ERROR_BADPARAM); - - if (!is_small(tptr[2]) || !is_small(tptr[3]) || - !(is_list(tptr[5]) || tptr[5] == NIL) || !is_small(tptr[6])) - RET_TO_BIF(NIL,DB_ERROR_BADPARAM); - if ((chunk_size = signed_val(tptr[3])) < 0) - RET_TO_BIF(NIL,DB_ERROR_BADPARAM); - mp = erts_db_get_match_prog_binary(tptr[4]); - if (!mp) - RET_TO_BIF(NIL,DB_ERROR_BADPARAM); - all_objects = mp->flags & BIN_FLAG_ALL_OBJECTS; - match_list = tptr[5]; - if ((got = signed_val(tptr[6])) < 0) - RET_TO_BIF(NIL,DB_ERROR_BADPARAM); + if (!mpi.something_can_match) { + /* Can't possibly match anything */ + ret_value = on_nothing_can_match(context_ptr, ret); + goto done; + } - slot_ix = signed_val(tptr[2]); - if (slot_ix < 0 /* EOT */ - || (chunk_size && got >= chunk_size)) { - goto done; /* Already got all or enough in the match_list */ + if (mpi.all_objects) { + mpi.mp->flags |= BIN_FLAG_ALL_OBJECTS; } - lck = RLOCK_HASH(tb,slot_ix); - if (slot_ix >= NACTIVE(tb)) { - RUNLOCK_HASH(lck); - RET_TO_BIF(NIL,DB_ERROR_BADPARAM); + /* + * Look for initial slot / bucket + */ + if (!mpi.key_given) { + /* Run this code if pattern is variable or GETKEY(pattern) */ + /* is a variable */ + slot_ix = 0; + lck = lock_hash_function(tb,slot_ix); + for (;;) { + ASSERT(slot_ix < NACTIVE(tb)); + if (*(current_ptr = &BUCKET(tb,slot_ix)) != NULL) { + break; + } + slot_ix = next_slot_function(tb,slot_ix,&lck); + if (slot_ix == 0) { + ret_value = on_loop_ended(context_ptr, slot_ix, got, iterations_left, &mpi.mp, ret); + goto done; + } + } + } else { + /* We have at least one */ + slot_ix = mpi.lists[current_list_pos].ix; + lck = lock_hash_function(tb, slot_ix); + current_ptr = mpi.lists[current_list_pos].bucket; + ASSERT(*current_ptr == BUCKET(tb,slot_ix)); + ++current_list_pos; } - while ((current = BUCKET(tb,slot_ix)) == NULL) { - slot_ix = next_slot(tb, slot_ix, &lck); - if (slot_ix == 0) { - slot_ix = -1; /* EOT */ - goto done; - } - } + /* + * Execute traversal cycle + */ for(;;) { - if (current->hvalue != INVALID_HASH && - (match_res = db_match_dbterm(&tb->common, p, mp, all_objects, - ¤t->dbterm, &hp, 2), - is_value(match_res))) { + if (*current_ptr != NULL) { + if ((*current_ptr)->hvalue != INVALID_HASH) { + match_res = db_match_dbterm(&tb->common, p, mpi.mp, 0, + &(*current_ptr)->dbterm, hpp, 2); + saved_current = *current_ptr; + if (on_match_res(context_ptr, slot_ix, ¤t_ptr, match_res)) { + ++got; + } + --iterations_left; + if (*current_ptr != saved_current) { + /* Don't advance to next, the callback did it already */ + continue; + } + } + current_ptr = &((*current_ptr)->next); + } + else if (mpi.key_given) { /* Key is bound */ + unlock_hash_function(lck); + if (current_list_pos == mpi.num_lists) { + ret_value = on_loop_ended(context_ptr, slot_ix, got, iterations_left, &mpi.mp, ret); + goto done; + } else { + slot_ix = mpi.lists[current_list_pos].ix; + lck = lock_hash_function(tb, slot_ix); + current_ptr = mpi.lists[current_list_pos].bucket; + ASSERT(mpi.lists[current_list_pos].bucket == &BUCKET(tb,slot_ix)); + ++current_list_pos; + } + } + else { /* Key is variable */ + if ((slot_ix = next_slot_function(tb,slot_ix,&lck)) == 0) { + slot_ix = -1; + break; + } + if (chunk_size && got >= chunk_size) { + unlock_hash_function(lck); + break; + } + if (iterations_left <= 0 || MBUF(p)) { + /* + * We have either reached our limit, or just created some heap fragments. + * Since many heap fragments will make the GC slower, trap and GC now. + */ + unlock_hash_function(lck); + ret_value = on_trap(context_ptr, slot_ix, got, &mpi.mp, ret); + goto done; + } + current_ptr = &BUCKET(tb,slot_ix); + } + } - match_list = CONS(hp, match_res, match_list); - ++got; - } + ret_value = on_loop_ended(context_ptr, slot_ix, got, iterations_left, &mpi.mp, ret); - --num_left; - save_slot_ix = slot_ix; - if ((current = next(tb, (Uint*)&slot_ix, &lck, current)) == NULL) { - slot_ix = -1; /* EOT */ - break; - } - if (slot_ix != save_slot_ix) { - if (chunk_size && got >= chunk_size) { - RUNLOCK_HASH(lck); - break; - } - if (num_left <= 0 || MBUF(p)) { - /* - * We have either reached our limit, or just created some heap fragments. - * Since many heap fragments will make the GC slower, trap and GC now. - */ - RUNLOCK_HASH(lck); - goto trap; - } - } - } done: - BUMP_REDS(p, 1000 - num_left); - if (chunk_size) { - Eterm continuation; - Eterm rest = NIL; - Sint rest_size = 0; - - if (got > chunk_size) { /* Cannot write destructively here, - the list may have - been in user space */ - rest = NIL; - hp = HAlloc(p, (got - chunk_size) * 2); - while (got-- > chunk_size) { - rest = CONS(hp, CAR(list_val(match_list)), rest); - hp += 2; - match_list = CDR(list_val(match_list)); - ++rest_size; - } - } - if (rest != NIL || slot_ix >= 0) { - hp = HAlloc(p,3+7); - continuation = TUPLE6(hp, tptr[1], make_small(slot_ix), - tptr[3], tptr[4], rest, - make_small(rest_size)); - hp += 7; - RET_TO_BIF(TUPLE2(hp, match_list, continuation),DB_ERROR_NONE); - } else { - if (match_list != NIL) { - hp = HAlloc(p, 3); - RET_TO_BIF(TUPLE2(hp, match_list, am_EOT),DB_ERROR_NONE); - } else { - RET_TO_BIF(am_EOT, DB_ERROR_NONE); - } - } + /* We should only jump directly to this label if + * we've already called on_nothing_can_match / on_loop_ended / on_trap + */ + if (mpi.mp != NULL) { + erts_bin_free(mpi.mp); } - RET_TO_BIF(match_list,DB_ERROR_NONE); - -trap: - BUMP_ALL_REDS(p); - - hp = HAlloc(p,7); - continuation = TUPLE6(hp, tptr[1], make_small(slot_ix), tptr[3], - tptr[4], match_list, make_small(got)); - RET_TO_BIF(bif_trap1(&ets_select_continue_exp, p, - continuation), - DB_ERROR_NONE); - -#undef RET_TO_BIF - -} + if (mpi.lists != mpi.dlists) { + erts_free(ERTS_ALC_T_DB_SEL_LIST, + (void *) mpi.lists); + } + return ret_value; -static int db_select_hash(Process *p, DbTable *tbl, Eterm tid, - Eterm pattern, int reverse, - Eterm *ret) -{ - return db_select_chunk_hash(p, tbl, tid, pattern, 0, reverse, ret); +#ifndef SMP +#undef lock_hash_function +#undef unlock_hash_function +#endif } -static int db_select_chunk_hash(Process *p, DbTable *tbl, Eterm tid, - Eterm pattern, Sint chunk_size, - int reverse, /* not used */ - Eterm *ret) +/* + * Continue hash table match traversal + */ +static int match_traverse_continue(Process* p, DbTableHash* tb, + Sint chunk_size, /* If 0, no chunking */ + Sint iterations_left, /* Nr. of iterations left */ + Eterm** hpp, /* Heap */ + Sint slot_ix, /* Slot index to resume traversal from */ + Sint got, /* Matched terms counter */ + Binary** mpp, /* Existing match program */ + int lock_for_write, /* Set to 1 if we're going to delete or + modify existing terms */ + mtraversal_on_match_res_t on_match_res, + mtraversal_on_loop_ended_t on_loop_ended, + mtraversal_on_trap_t on_trap, + void* context_ptr, /* For callbacks */ + Eterm* ret) { - DbTableHash *tb = &tbl->hash; - struct mp_info mpi; - Sint slot_ix; - HashDbTerm *current = 0; - unsigned current_list_pos = 0; - Eterm match_list; - Eterm match_res; - Eterm *hp; - int num_left = 1000; - Uint got = 0; - Eterm continuation; - int errcode; - Eterm mpb; - erts_smp_rwmtx_t* lck; - - -#define RET_TO_BIF(Term,RetVal) do { \ - if (mpi.mp != NULL) { \ - erts_bin_free(mpi.mp); \ - } \ - if (mpi.lists != mpi.dlists) { \ - erts_free(ERTS_ALC_T_DB_SEL_LIST, \ - (void *) mpi.lists); \ - } \ - *ret = (Term); \ - return RetVal; \ - } while(0) + int all_objects = (*mpp)->flags & BIN_FLAG_ALL_OBJECTS; + HashDbTerm** current_ptr = NULL; /* Refers to either the bucket pointer or + * the 'next' pointer in the previous term + */ + HashDbTerm* saved_current = NULL; /* Helper to avoid double skip on match */ + Eterm match_res = NIL; + erts_smp_rwmtx_t* lck = NULL; + int ret_value = DB_ERROR_NONE; +#ifdef ERTS_SMP + erts_smp_rwmtx_t* (*lock_hash_function)(DbTableHash*, HashValue) + = (lock_for_write ? WLOCK_HASH : RLOCK_HASH); + void (*unlock_hash_function)(erts_smp_rwmtx_t*) + = (lock_for_write ? WUNLOCK_HASH : RUNLOCK_HASH); +#else + #define lock_hash_function(tb, hval) NULL + #define unlock_hash_function(lck) ((void)lck) +#endif + Sint (*next_slot_function)(DbTableHash* tb, Uint ix, erts_smp_rwmtx_t** lck_ptr) + = (lock_for_write ? next_slot_w : next_slot); + *ret = NIL; - if ((errcode = analyze_pattern(tb, pattern, &mpi)) != DB_ERROR_NONE) { - RET_TO_BIF(NIL,errcode); - } + if (got < 0) + return DB_ERROR_BADPARAM; - if (!mpi.something_can_match) { - if (chunk_size) { - RET_TO_BIF(am_EOT, DB_ERROR_NONE); /* We're done */ - } - RET_TO_BIF(NIL, DB_ERROR_NONE); - /* can't possibly match anything */ + if (slot_ix < 0 /* EOT */ + || (chunk_size && got >= chunk_size)) + { + /* Already got all or enough in the match_list */ + ret_value = on_loop_ended(context_ptr, slot_ix, got, iterations_left, mpp, ret); + goto done; } - if (!mpi.key_given) { - /* Run this code if pattern is variable or GETKEY(pattern) */ - /* is a variable */ - slot_ix = 0; - lck = RLOCK_HASH(tb,slot_ix); - for (;;) { - ASSERT(slot_ix < NACTIVE(tb)); - if ((current = BUCKET(tb,slot_ix)) != NULL) { - break; - } - slot_ix = next_slot(tb,slot_ix,&lck); - if (slot_ix == 0) { - if (chunk_size) { - RET_TO_BIF(am_EOT, DB_ERROR_NONE); /* We're done */ - } - RET_TO_BIF(NIL,DB_ERROR_NONE); - } - } - } else { - /* We have at least one */ - slot_ix = mpi.lists[current_list_pos].ix; - lck = RLOCK_HASH(tb, slot_ix); - current = *(mpi.lists[current_list_pos].bucket); - ASSERT(current == BUCKET(tb,slot_ix)); - ++current_list_pos; + lck = lock_hash_function(tb, slot_ix); + if (slot_ix >= NACTIVE(tb)) { /* Is this possible? */ + unlock_hash_function(lck); + ret_value = DB_ERROR_BADPARAM; + goto done; } - match_list = NIL; - + /* + * Resume traversal cycle from where we left + */ + current_ptr = &BUCKET(tb,slot_ix); for(;;) { - if (current != NULL) { - if (current->hvalue != INVALID_HASH) { - match_res = db_match_dbterm(&tb->common, p, mpi.mp, 0, - ¤t->dbterm, &hp, 2); - if (is_value(match_res)) { - match_list = CONS(hp, match_res, match_list); - ++got; - } - --num_left; - } - current = current->next; - } - else if (mpi.key_given) { /* Key is bound */ - RUNLOCK_HASH(lck); - if (current_list_pos == mpi.num_lists) { - slot_ix = -1; /* EOT */ - goto done; - } else { - slot_ix = mpi.lists[current_list_pos].ix; - lck = RLOCK_HASH(tb, slot_ix); - current = *(mpi.lists[current_list_pos].bucket); - ASSERT(mpi.lists[current_list_pos].bucket == &BUCKET(tb,slot_ix)); - ++current_list_pos; - } - } - else { /* Key is variable */ - - if ((slot_ix=next_slot(tb,slot_ix,&lck)) == 0) { - slot_ix = -1; - break; - } - if (chunk_size && got >= chunk_size) { - RUNLOCK_HASH(lck); - break; - } - if (num_left <= 0 || MBUF(p)) { - /* - * We have either reached our limit, or just created some heap fragments. - * Since many heap fragments will make the GC slower, trap and GC now. - */ - RUNLOCK_HASH(lck); - goto trap; - } - current = BUCKET(tb,slot_ix); + if (*current_ptr != NULL) { + if ((*current_ptr)->hvalue != INVALID_HASH) { + match_res = db_match_dbterm(&tb->common, p, *mpp, all_objects, + &(*current_ptr)->dbterm, hpp, 2); + saved_current = *current_ptr; + if (on_match_res(context_ptr, slot_ix, ¤t_ptr, match_res)) { + ++got; + } + --iterations_left; + if (*current_ptr != saved_current) { + /* Don't advance to next, the callback did it already */ + continue; + } + } + current_ptr = &((*current_ptr)->next); + } + else { + if ((slot_ix=next_slot_function(tb,slot_ix,&lck)) == 0) { + slot_ix = -1; + break; + } + if (chunk_size && got >= chunk_size) { + unlock_hash_function(lck); + break; + } + if (iterations_left <= 0 || MBUF(p)) { + /* + * We have either reached our limit, or just created some heap fragments. + * Since many heap fragments will make the GC slower, trap and GC now. + */ + unlock_hash_function(lck); + ret_value = on_trap(context_ptr, slot_ix, got, mpp, ret); + goto done; + } + current_ptr = &BUCKET(tb,slot_ix); } } -done: - BUMP_REDS(p, 1000 - num_left); - if (chunk_size) { - Eterm continuation; - Eterm rest = NIL; - Sint rest_size = 0; - - if (mpi.all_objects) - (mpi.mp)->flags |= BIN_FLAG_ALL_OBJECTS; - if (got > chunk_size) { /* Split list in return value and 'rest' */ - Eterm tmp = match_list; - rest = match_list; - while (got-- > chunk_size + 1) { - tmp = CDR(list_val(tmp)); - ++rest_size; - } - ++rest_size; - match_list = CDR(list_val(tmp)); - CDR(list_val(tmp)) = NIL; /* Destructive, the list has never - been in 'user space' */ - } - if (rest != NIL || slot_ix >= 0) { /* Need more calls */ - hp = HAlloc(p,3+7+ERTS_MAGIC_REF_THING_SIZE); - mpb = erts_db_make_match_prog_ref(p,(mpi.mp),&hp); - if (mpi.all_objects) - (mpi.mp)->flags |= BIN_FLAG_ALL_OBJECTS; - continuation = TUPLE6(hp, tid, make_small(slot_ix), - make_small(chunk_size), - mpb, rest, - make_small(rest_size)); - mpi.mp = NULL; /*otherwise the return macro will destroy it */ - hp += 7; - RET_TO_BIF(TUPLE2(hp, match_list, continuation),DB_ERROR_NONE); - } else { /* All data is exhausted */ - if (match_list != NIL) { /* No more data to search but still a - result to return to the caller */ - hp = HAlloc(p, 3); - RET_TO_BIF(TUPLE2(hp, match_list, am_EOT),DB_ERROR_NONE); - } else { /* Reached the end of the ttable with no data to return */ - RET_TO_BIF(am_EOT, DB_ERROR_NONE); - } - } - } - RET_TO_BIF(match_list,DB_ERROR_NONE); -trap: - BUMP_ALL_REDS(p); - if (mpi.all_objects) - (mpi.mp)->flags |= BIN_FLAG_ALL_OBJECTS; - hp = HAlloc(p,7+ERTS_MAGIC_REF_THING_SIZE); - mpb = erts_db_make_match_prog_ref(p,(mpi.mp),&hp); - continuation = TUPLE6(hp, tid, make_small(slot_ix), - make_small(chunk_size), - mpb, match_list, - make_small(got)); - mpi.mp = NULL; /*otherwise the return macro will destroy it */ - RET_TO_BIF(bif_trap1(&ets_select_continue_exp, p, - continuation), - DB_ERROR_NONE); -#undef RET_TO_BIF - -} + ret_value = on_loop_ended(context_ptr, slot_ix, got, iterations_left, mpp, ret); -static int db_select_count_hash(Process *p, - DbTable *tbl, - Eterm tid, - Eterm pattern, - Eterm *ret) -{ - DbTableHash *tb = &tbl->hash; - struct mp_info mpi; - Uint slot_ix = 0; - HashDbTerm* current = NULL; - unsigned current_list_pos = 0; - Eterm *hp; - int num_left = 1000; - Uint got = 0; - Eterm continuation; - int errcode; - Eterm egot; - Eterm mpb; - erts_smp_rwmtx_t* lck; - -#define RET_TO_BIF(Term,RetVal) do { \ - if (mpi.mp != NULL) { \ - erts_bin_free(mpi.mp); \ - } \ - if (mpi.lists != mpi.dlists) { \ - erts_free(ERTS_ALC_T_DB_SEL_LIST, \ - (void *) mpi.lists); \ - } \ - *ret = (Term); \ - return RetVal; \ - } while(0) +done: + /* We should only jump directly to this label if + * we've already called on_loop_ended / on_trap + */ + return ret_value; +#ifndef SMP +#undef lock_hash_function +#undef unlock_hash_function +#endif +} - if ((errcode = analyze_pattern(tb, pattern, &mpi)) != DB_ERROR_NONE) { - RET_TO_BIF(NIL,errcode); - } - if (!mpi.something_can_match) { - RET_TO_BIF(make_small(0), DB_ERROR_NONE); - /* can't possibly match anything */ - } +/* + * Common traversal trapping/continuation code; + * used by select_count, select_delete and select_replace, + * as well as their continuation-handling counterparts. + */ - if (!mpi.key_given) { - /* Run this code if pattern is variable or GETKEY(pattern) */ - /* is a variable */ - slot_ix = 0; - lck = RLOCK_HASH(tb,slot_ix); - current = BUCKET(tb,slot_ix); - } else { - /* We have at least one */ - slot_ix = mpi.lists[current_list_pos].ix; - lck = RLOCK_HASH(tb, slot_ix); - current = *(mpi.lists[current_list_pos].bucket); - ASSERT(current == BUCKET(tb,slot_ix)); - ++current_list_pos; - } +static ERTS_INLINE int on_mtraversal_simple_trap(Export* trap_function, + Process* p, + DbTableHash* tb, + Eterm tid, + Eterm* prev_continuation_tptr, + Sint slot_ix, + Sint got, + Binary** mpp, + Eterm* ret) +{ + Eterm* hp = NULL; + Eterm egot = NIL; + Eterm mpb = NIL; + Eterm continuation = NIL; + int is_first_trap = (prev_continuation_tptr == NULL); + size_t base_halloc_sz = (is_first_trap ? PROC_BIN_SIZE : 0); - for(;;) { - if (current != NULL) { - if (current->hvalue != INVALID_HASH) { - if (db_match_dbterm(&tb->common, p, mpi.mp, 0, - ¤t->dbterm, NULL,0) == am_true) { - ++got; - } - --num_left; - } - current = current->next; - } - else { /* next bucket */ - if (mpi.key_given) { /* Key is bound */ - RUNLOCK_HASH(lck); - if (current_list_pos == mpi.num_lists) { - goto done; - } else { - slot_ix = mpi.lists[current_list_pos].ix; - lck = RLOCK_HASH(tb, slot_ix); - current = *(mpi.lists[current_list_pos].bucket); - ASSERT(mpi.lists[current_list_pos].bucket == &BUCKET(tb,slot_ix)); - ++current_list_pos; - } - } - else { - if ((slot_ix=next_slot(tb,slot_ix,&lck)) == 0) { - goto done; - } - if (num_left <= 0) { - RUNLOCK_HASH(lck); - goto trap; - } - current = BUCKET(tb,slot_ix); - } - } - } -done: - BUMP_REDS(p, 1000 - num_left); - RET_TO_BIF(erts_make_integer(got,p),DB_ERROR_NONE); -trap: BUMP_ALL_REDS(p); if (IS_USMALL(0, got)) { - hp = HAlloc(p, ERTS_MAGIC_REF_THING_SIZE + 5); + hp = HAlloc(p, base_halloc_sz + 5); egot = make_small(got); } else { - hp = HAlloc(p, BIG_UINT_HEAP_SIZE + ERTS_MAGIC_REF_THING_SIZE + 5); + hp = HAlloc(p, base_halloc_sz + BIG_UINT_HEAP_SIZE + 5); egot = uint_to_big(got, hp); hp += BIG_UINT_HEAP_SIZE; } - mpb = erts_db_make_match_prog_ref(p,mpi.mp,&hp); - continuation = TUPLE4(hp, tid, make_small(slot_ix), - mpb, - egot); - mpi.mp = NULL; /*otherwise the return macro will destroy it */ - RET_TO_BIF(bif_trap1(&ets_select_count_continue_exp, p, - continuation), - DB_ERROR_NONE); -#undef RET_TO_BIF + if (is_first_trap) { + mpb = db_make_mp_binary(p, *mpp, &hp); + *mpp = NULL; /* otherwise the caller will destroy it */ + } + else { + mpb = prev_continuation_tptr[3]; + } + + continuation = TUPLE4( + hp, + tid, + make_small(slot_ix), + mpb, + egot); + *ret = bif_trap1(trap_function, p, continuation); + return DB_ERROR_NONE; } -static int db_select_delete_hash(Process *p, - DbTable *tbl, - Eterm tid, - Eterm pattern, - Eterm *ret) +static ERTS_INLINE int unpack_simple_mtraversal_continuation(Eterm continuation, + Eterm** tptr_ptr, + Eterm* tid_ptr, + Sint* slot_ix_p, + Binary** mpp, + Sint* got_p) { - DbTableHash *tb = &tbl->hash; - struct mp_info mpi; - Uint slot_ix = 0; - HashDbTerm **current = NULL; - unsigned current_list_pos = 0; - Eterm *hp; - int num_left = 1000; - Uint got = 0; - Eterm continuation; - int errcode; - Uint last_pseudo_delete = (Uint)-1; - Eterm mpb; - Eterm egot; -#ifdef ERTS_SMP - erts_aint_t fixated_by_me = tb->common.is_thread_safe ? 0 : 1; /* ToDo: something nicer */ -#else - erts_aint_t fixated_by_me = 0; -#endif - erts_smp_rwmtx_t* lck; - -#define RET_TO_BIF(Term,RetVal) do { \ - if (mpi.mp != NULL) { \ - erts_bin_free(mpi.mp); \ - } \ - if (mpi.lists != mpi.dlists) { \ - erts_free(ERTS_ALC_T_DB_SEL_LIST, \ - (void *) mpi.lists); \ - } \ - *ret = (Term); \ - return RetVal; \ - } while(0) - + Eterm* tptr = NULL; + ASSERT(is_tuple(continuation)); + tptr = tuple_val(continuation); + if (arityval(*tptr) != 4) + return 1; - if ((errcode = analyze_pattern(tb, pattern, &mpi)) != DB_ERROR_NONE) { - RET_TO_BIF(NIL,errcode); + if (! is_small(tptr[2]) + || !(is_binary(tptr[3]) && thing_subtag(*binary_val(tptr[3])) == REFC_BINARY_SUBTAG) + || !(is_big(tptr[4]) || is_small(tptr[4]))) + { + return 1; } - if (!mpi.something_can_match) { - RET_TO_BIF(make_small(0), DB_ERROR_NONE); - /* can't possibly match anything */ + *tptr_ptr = tptr; + *tid_ptr = tptr[1]; + *slot_ix_p = unsigned_val(tptr[2]); + *mpp = ((ProcBin *) binary_val(tptr[3]))->val; + if (is_big(tptr[4])) { + *got_p = big_to_uint32(tptr[4]); + } + else { + *got_p = unsigned_val(tptr[4]); } + return 0; +} - if (!mpi.key_given) { - /* Run this code if pattern is variable or GETKEY(pattern) */ - /* is a variable */ - lck = WLOCK_HASH(tb,slot_ix); - current = &BUCKET(tb,slot_ix); - } else { - /* We have at least one */ - slot_ix = mpi.lists[current_list_pos].ix; - lck = WLOCK_HASH(tb, slot_ix); - current = mpi.lists[current_list_pos++].bucket; - ASSERT(*current == BUCKET(tb,slot_ix)); + +/* + * + * select / select_chunk match traversal + * + */ + +#define MAX_SELECT_CHUNK_ITERATIONS 1000 + +typedef struct { + Process* p; + DbTableHash* tb; + Eterm tid; + Eterm* hp; + Sint chunk_size; + Eterm match_list; + Eterm* prev_continuation_tptr; +} mtraversal_select_chunk_context_t; + +static int mtraversal_select_chunk_on_nothing_can_match(void* context_ptr, Eterm* ret) { + mtraversal_select_chunk_context_t* sc_context_ptr = (mtraversal_select_chunk_context_t*) context_ptr; + *ret = (sc_context_ptr->chunk_size > 0 ? am_EOT : NIL); + return DB_ERROR_NONE; +} + +static int mtraversal_select_chunk_on_match_res(void* context_ptr, Sint slot_ix, + HashDbTerm*** current_ptr_ptr, + Eterm match_res) +{ + mtraversal_select_chunk_context_t* sc_context_ptr = (mtraversal_select_chunk_context_t*) context_ptr; + if (is_value(match_res)) { + sc_context_ptr->match_list = CONS(sc_context_ptr->hp, match_res, sc_context_ptr->match_list); + return 1; } + return 0; +} +static int mtraversal_select_chunk_on_loop_ended(void* context_ptr, Sint slot_ix, Sint got, + Sint iterations_left, Binary** mpp, Eterm* ret) +{ + mtraversal_select_chunk_context_t* sc_context_ptr = (mtraversal_select_chunk_context_t*) context_ptr; + Eterm mpb = NIL; - for(;;) { - if ((*current) == NULL) { - if (mpi.key_given) { /* Key is bound */ - WUNLOCK_HASH(lck); - if (current_list_pos == mpi.num_lists) { - goto done; - } else { - slot_ix = mpi.lists[current_list_pos].ix; - lck = WLOCK_HASH(tb, slot_ix); - current = mpi.lists[current_list_pos].bucket; - ASSERT(mpi.lists[current_list_pos].bucket == &BUCKET(tb,slot_ix)); - ++current_list_pos; - } - } else { - if ((slot_ix=next_slot_w(tb,slot_ix,&lck)) == 0) { - goto done; - } - if (num_left <= 0) { - WUNLOCK_HASH(lck); - goto trap; - } - current = &BUCKET(tb,slot_ix); - } - } - else if ((*current)->hvalue == INVALID_HASH) { - current = &((*current)->next); - } - else { - int did_erase = 0; - if (db_match_dbterm(&tb->common, p, mpi.mp, 0, - &(*current)->dbterm, NULL, 0) == am_true) { - HashDbTerm *del; - if (NFIXED(tb) > fixated_by_me) { /* fixated by others? */ - if (slot_ix != last_pseudo_delete) { - if (!add_fixed_deletion(tb, slot_ix, fixated_by_me)) - goto do_erase; - last_pseudo_delete = slot_ix; - } - (*current)->hvalue = INVALID_HASH; - } else { - do_erase: - del = *current; - *current = (*current)->next; - free_term(tb, del); - did_erase = 1; - } - erts_smp_atomic_dec_nob(&tb->common.nitems); - ++got; - } - --num_left; - if (!did_erase) { - current = &((*current)->next); - } - } + if (iterations_left == MAX_SELECT_CHUNK_ITERATIONS) { + /* We didn't get to iterate a single time, which means EOT */ + ASSERT(sc_context_ptr->match_list == NIL); + *ret = (sc_context_ptr->chunk_size > 0 ? am_EOT : NIL); + return DB_ERROR_NONE; } -done: - BUMP_REDS(p, 1000 - num_left); - if (got) { - try_shrink(tb); + else { + ASSERT(iterations_left < MAX_SELECT_CHUNK_ITERATIONS); + BUMP_REDS(sc_context_ptr->p, MAX_SELECT_CHUNK_ITERATIONS - iterations_left); + if (sc_context_ptr->chunk_size) { + Eterm continuation; + Eterm rest = NIL; + Sint rest_size = 0; + + if (got > sc_context_ptr->chunk_size) { /* Split list in return value and 'rest' */ + Eterm tmp = sc_context_ptr->match_list; + rest = sc_context_ptr->match_list; + while (got-- > sc_context_ptr->chunk_size + 1) { + tmp = CDR(list_val(tmp)); + ++rest_size; + } + ++rest_size; + sc_context_ptr->match_list = CDR(list_val(tmp)); + CDR(list_val(tmp)) = NIL; /* Destructive, the list has never + been in 'user space' */ + } + if (rest != NIL || slot_ix >= 0) { /* Need more calls */ + sc_context_ptr->hp = HAlloc(sc_context_ptr->p, 3 + 7 + PROC_BIN_SIZE); + mpb = db_make_mp_binary(sc_context_ptr->p, *mpp, &sc_context_ptr->hp); + continuation = TUPLE6( + sc_context_ptr->hp, + sc_context_ptr->tid, + make_small(slot_ix), + make_small(sc_context_ptr->chunk_size), + mpb, rest, + make_small(rest_size)); + *mpp = NULL; /* Otherwise the caller will destroy it */ + sc_context_ptr->hp += 7; + *ret = TUPLE2(sc_context_ptr->hp, sc_context_ptr->match_list, continuation); + return DB_ERROR_NONE; + } else { /* All data is exhausted */ + if (sc_context_ptr->match_list != NIL) { /* No more data to search but still a + result to return to the caller */ + sc_context_ptr->hp = HAlloc(sc_context_ptr->p, 3); + *ret = TUPLE2(sc_context_ptr->hp, sc_context_ptr->match_list, am_EOT); + return DB_ERROR_NONE; + } else { /* Reached the end of the ttable with no data to return */ + *ret = am_EOT; + return DB_ERROR_NONE; + } + } + } + *ret = sc_context_ptr->match_list; + return DB_ERROR_NONE; } - RET_TO_BIF(erts_make_integer(got,p),DB_ERROR_NONE); -trap: - BUMP_ALL_REDS(p); - if (IS_USMALL(0, got)) { - hp = HAlloc(p, ERTS_MAGIC_REF_THING_SIZE + 5); - egot = make_small(got); +} + +static int mtraversal_select_chunk_on_trap(void* context_ptr, Sint slot_ix, Sint got, + Binary** mpp, Eterm* ret) +{ + mtraversal_select_chunk_context_t* sc_context_ptr = (mtraversal_select_chunk_context_t*) context_ptr; + Eterm mpb = NIL; + Eterm continuation = NIL; + Eterm* hp = NULL; + + BUMP_ALL_REDS(sc_context_ptr->p); + + if (sc_context_ptr->prev_continuation_tptr == NULL) { + /* First time we're trapping */ + hp = HAlloc(sc_context_ptr->p, 7 + PROC_BIN_SIZE); + mpb = db_make_mp_binary(sc_context_ptr->p, *mpp, &hp); + continuation = TUPLE6( + hp, + sc_context_ptr->tid, + make_small(slot_ix), + make_small(sc_context_ptr->chunk_size), + mpb, + sc_context_ptr->match_list, + make_small(got)); + *mpp = NULL; /* otherwise the caller will destroy it */ } else { - hp = HAlloc(p, BIG_UINT_HEAP_SIZE + ERTS_MAGIC_REF_THING_SIZE + 5); - egot = uint_to_big(got, hp); - hp += BIG_UINT_HEAP_SIZE; - } - mpb = erts_db_make_match_prog_ref(p,mpi.mp,&hp); - continuation = TUPLE4(hp, tid, make_small(slot_ix), - mpb, - egot); - mpi.mp = NULL; /*otherwise the return macro will destroy it */ - RET_TO_BIF(bif_trap1(&ets_select_delete_continue_exp, p, - continuation), - DB_ERROR_NONE); + /* Not the first time we're trapping; reuse continuation terms */ + hp = HAlloc(sc_context_ptr->p, 7); + continuation = TUPLE6( + hp, + sc_context_ptr->prev_continuation_tptr[1], + make_small(slot_ix), + sc_context_ptr->prev_continuation_tptr[3], + sc_context_ptr->prev_continuation_tptr[4], + sc_context_ptr->match_list, + make_small(got)); + } + *ret = bif_trap1(&ets_select_continue_exp, sc_context_ptr->p, continuation); + return DB_ERROR_NONE; +} -#undef RET_TO_BIF +static int db_select_hash(Process *p, DbTable *tbl, Eterm tid, Eterm pattern, int reverse, Eterm *ret) { + return db_select_chunk_hash(p, tbl, tid, pattern, 0, reverse, ret); +} +static int db_select_chunk_hash(Process *p, DbTable *tbl, Eterm tid, Eterm pattern, Sint chunk_size, + int reverse, Eterm *ret) +{ + mtraversal_select_chunk_context_t sc_context = {0}; + sc_context.p = p; + sc_context.tb = &tbl->hash; + sc_context.tid = tid; + sc_context.hp = NULL; + sc_context.chunk_size = chunk_size; + sc_context.match_list = NIL; + sc_context.prev_continuation_tptr = NULL; + + return match_traverse( + sc_context.p, sc_context.tb, pattern, sc_context.chunk_size, + MAX_SELECT_CHUNK_ITERATIONS, + &sc_context.hp, 0, + mtraversal_select_chunk_on_nothing_can_match, + mtraversal_select_chunk_on_match_res, + mtraversal_select_chunk_on_loop_ended, + mtraversal_select_chunk_on_trap, + &sc_context, ret); } + /* -** This is called when select_delete traps -*/ -static int db_select_delete_continue_hash(Process *p, - DbTable *tbl, - Eterm continuation, - Eterm *ret) + * + * select_continue match traversal + * + */ + +static int mtraversal_select_chunk_continue_on_loop_ended(void* context_ptr, Sint slot_ix, Sint got, + Sint iterations_left, Binary** mpp, Eterm* ret) { - DbTableHash *tb = &tbl->hash; - Uint slot_ix; - Uint last_pseudo_delete = (Uint)-1; - HashDbTerm **current = NULL; - Eterm *hp; - int num_left = 1000; - Uint got; - Eterm *tptr; - Binary *mp; - Eterm egot; - int fixated_by_me = ONLY_WRITER(p,tb) ? 0 : 1; /* ToDo: something nicer */ - erts_smp_rwmtx_t* lck; + mtraversal_select_chunk_context_t* sc_context_ptr = (mtraversal_select_chunk_context_t*) context_ptr; + Eterm continuation = NIL; + Eterm rest = NIL; + Eterm* hp = NULL; + + ASSERT(iterations_left <= MAX_SELECT_CHUNK_ITERATIONS); + BUMP_REDS(sc_context_ptr->p, MAX_SELECT_CHUNK_ITERATIONS - iterations_left); + if (sc_context_ptr->chunk_size) { + Sint rest_size = 0; + if (got > sc_context_ptr->chunk_size) { + /* Cannot write destructively here, + the list may have + been in user space */ + rest = NIL; + hp = HAlloc(sc_context_ptr->p, (got - sc_context_ptr->chunk_size) * 2); + while (got-- > sc_context_ptr->chunk_size) { + rest = CONS(hp, CAR(list_val(sc_context_ptr->match_list)), rest); + hp += 2; + sc_context_ptr->match_list = CDR(list_val(sc_context_ptr->match_list)); + ++rest_size; + } + } + if (rest != NIL || slot_ix >= 0) { + hp = HAlloc(sc_context_ptr->p, 3 + 7); + continuation = TUPLE6( + hp, + sc_context_ptr->prev_continuation_tptr[1], + make_small(slot_ix), + sc_context_ptr->prev_continuation_tptr[3], + sc_context_ptr->prev_continuation_tptr[4], + rest, + make_small(rest_size)); + hp += 7; + *ret = TUPLE2(hp, sc_context_ptr->match_list, continuation); + return DB_ERROR_NONE; + } else { + if (sc_context_ptr->match_list != NIL) { + hp = HAlloc(sc_context_ptr->p, 3); + *ret = TUPLE2(hp, sc_context_ptr->match_list, am_EOT); + return DB_ERROR_NONE; + } else { + *ret = am_EOT; + return DB_ERROR_NONE; + } + } + } + *ret = sc_context_ptr->match_list; + return DB_ERROR_NONE; +} -#define RET_TO_BIF(Term,RetVal) do { \ - *ret = (Term); \ - return RetVal; \ - } while(0) +/* + * This is called when select traps + */ +static int db_select_continue_hash(Process* p, DbTable* tbl, Eterm continuation, Eterm* ret) { + mtraversal_select_chunk_context_t sc_context = {0}; + Eterm* tptr = NULL; + Eterm tid = NIL; + Binary* mp = NULL; + Sint got = 0; + Sint slot_ix = 0; + Sint chunk_size = 0; + Eterm match_list = NIL; + Sint iterations_left = MAX_SELECT_CHUNK_ITERATIONS; + *ret = NIL; - + /* Decode continuation. We know it's a tuple but not the arity or anything else */ + ASSERT(is_tuple(continuation)); tptr = tuple_val(continuation); - slot_ix = unsigned_val(tptr[2]); - mp = erts_db_get_match_prog_binary_unchecked(tptr[3]); - if (is_big(tptr[4])) { - got = big_to_uint32(tptr[4]); - } else { - got = unsigned_val(tptr[4]); - } - - lck = WLOCK_HASH(tb,slot_ix); - if (slot_ix >= NACTIVE(tb)) { - WUNLOCK_HASH(lck); - goto done; - } - current = &BUCKET(tb,slot_ix); - for(;;) { - if ((*current) == NULL) { - if ((slot_ix=next_slot_w(tb,slot_ix,&lck)) == 0) { - goto done; - } - if (num_left <= 0) { - WUNLOCK_HASH(lck); - goto trap; - } - current = &BUCKET(tb,slot_ix); - } - else if ((*current)->hvalue == INVALID_HASH) { - current = &((*current)->next); - } - else { - int did_erase = 0; - if (db_match_dbterm(&tb->common, p, mp, 0, - &(*current)->dbterm, NULL, 0) == am_true) { - HashDbTerm *del; - if (NFIXED(tb) > fixated_by_me) { /* fixated by others? */ - if (slot_ix != last_pseudo_delete) { - if (!add_fixed_deletion(tb, slot_ix, fixated_by_me)) - goto do_erase; - last_pseudo_delete = slot_ix; - } - (*current)->hvalue = INVALID_HASH; - } else { - do_erase: - del = *current; - *current = (*current)->next; - free_term(tb, del); - did_erase = 1; - } - erts_smp_atomic_dec_nob(&tb->common.nitems); - ++got; - } - - --num_left; - if (!did_erase) { - current = &((*current)->next); - } - } - } -done: - BUMP_REDS(p, 1000 - num_left); - if (got) { - try_shrink(tb); - } - RET_TO_BIF(erts_make_integer(got,p),DB_ERROR_NONE); -trap: - BUMP_ALL_REDS(p); - if (IS_USMALL(0, got)) { - hp = HAlloc(p, 5); - egot = make_small(got); - } - else { - hp = HAlloc(p, BIG_UINT_HEAP_SIZE + 5); - egot = uint_to_big(got, hp); - hp += BIG_UINT_HEAP_SIZE; - } - continuation = TUPLE4(hp, tptr[1], make_small(slot_ix), - tptr[3], - egot); - RET_TO_BIF(bif_trap1(&ets_select_delete_continue_exp, p, - continuation), - DB_ERROR_NONE); + if (arityval(*tptr) != 6) + return DB_ERROR_BADPARAM; -#undef RET_TO_BIF + if (!is_small(tptr[2]) || !is_small(tptr[3]) || !is_binary(tptr[4]) || + !(is_list(tptr[5]) || tptr[5] == NIL) || !is_small(tptr[6])) + return DB_ERROR_BADPARAM; + if ((chunk_size = signed_val(tptr[3])) < 0) + return DB_ERROR_BADPARAM; + if (!(thing_subtag(*binary_val(tptr[4])) == REFC_BINARY_SUBTAG)) + return DB_ERROR_BADPARAM; + mp = ((ProcBin *) binary_val(tptr[4]))->val; + if (!IsMatchProgBinary(mp)) + return DB_ERROR_BADPARAM; + + if ((got = signed_val(tptr[6])) < 0) + return DB_ERROR_BADPARAM; + + tid = tptr[1]; + slot_ix = signed_val(tptr[2]); + match_list = tptr[5]; + + /* Proceed */ + sc_context.p = p; + sc_context.tb = &tbl->hash; + sc_context.tid = tid; + sc_context.hp = NULL; + sc_context.chunk_size = chunk_size; + sc_context.match_list = match_list; + sc_context.prev_continuation_tptr = tptr; + + return match_traverse_continue( + sc_context.p, sc_context.tb, sc_context.chunk_size, + iterations_left, &sc_context.hp, slot_ix, got, &mp, 0, + mtraversal_select_chunk_on_match_res, /* Reuse callback */ + mtraversal_select_chunk_continue_on_loop_ended, + mtraversal_select_chunk_on_trap, /* Reuse callback */ + &sc_context, ret); } - + +#undef MAX_SELECT_CHUNK_ITERATIONS + + /* -** This is called when select_count traps -*/ -static int db_select_count_continue_hash(Process *p, - DbTable *tbl, - Eterm continuation, - Eterm *ret) + * + * select_count match traversal + * + */ + +#define MAX_SELECT_COUNT_ITERATIONS 1000 + +typedef struct { + Process* p; + DbTableHash* tb; + Eterm tid; + Eterm* hp; + Eterm* prev_continuation_tptr; +} mtraversal_select_count_context_t; + +static int mtraversal_select_count_on_nothing_can_match(void* context_ptr, Eterm* ret) { + *ret = make_small(0); + return DB_ERROR_NONE; +} + +static int mtraversal_select_count_on_match_res(void* context_ptr, Sint slot_ix, + HashDbTerm*** current_ptr_ptr, + Eterm match_res) { - DbTableHash *tb = &tbl->hash; - Uint slot_ix; - HashDbTerm* current; - Eterm *hp; - int num_left = 1000; - Uint got; - Eterm *tptr; - Binary *mp; - Eterm egot; - erts_smp_rwmtx_t* lck; + return (match_res == am_true); +} -#define RET_TO_BIF(Term,RetVal) do { \ - *ret = (Term); \ - return RetVal; \ - } while(0) +static int mtraversal_select_count_on_loop_ended(void* context_ptr, Sint slot_ix, Sint got, + Sint iterations_left, Binary** mpp, Eterm* ret) +{ + mtraversal_select_count_context_t* scnt_context_ptr = (mtraversal_select_count_context_t*) context_ptr; + ASSERT(iterations_left <= MAX_SELECT_COUNT_ITERATIONS); + BUMP_REDS(scnt_context_ptr->p, MAX_SELECT_COUNT_ITERATIONS - iterations_left); + *ret = erts_make_integer(got, scnt_context_ptr->p); + return DB_ERROR_NONE; +} - - tptr = tuple_val(continuation); - slot_ix = unsigned_val(tptr[2]); - mp = erts_db_get_match_prog_binary_unchecked(tptr[3]); - if (is_big(tptr[4])) { - got = big_to_uint32(tptr[4]); - } else { - got = unsigned_val(tptr[4]); - } - +static int mtraversal_select_count_on_trap(void* context_ptr, Sint slot_ix, Sint got, + Binary** mpp, Eterm* ret) +{ + mtraversal_select_count_context_t* scnt_context_ptr = (mtraversal_select_count_context_t*) context_ptr; + return on_mtraversal_simple_trap( + &ets_select_count_continue_exp, + scnt_context_ptr->p, + scnt_context_ptr->tb, + scnt_context_ptr->tid, + scnt_context_ptr->prev_continuation_tptr, + slot_ix, got, mpp, ret); +} - lck = RLOCK_HASH(tb, slot_ix); - if (slot_ix >= NACTIVE(tb)) { /* Is this posible? */ - RUNLOCK_HASH(lck); - goto done; - } - current = BUCKET(tb,slot_ix); - - for(;;) { - if (current != NULL) { - if (current->hvalue == INVALID_HASH) { - current = current->next; - continue; - } - if (db_match_dbterm(&tb->common, p, mp, 0, ¤t->dbterm, - NULL, 0) == am_true) { - ++got; - } - --num_left; - current = current->next; - } - else { /* next bucket */ - if ((slot_ix = next_slot(tb,slot_ix,&lck)) == 0) { - goto done; - } - if (num_left <= 0) { - RUNLOCK_HASH(lck); - goto trap; - } - current = BUCKET(tb,slot_ix); - } +static int db_select_count_hash(Process *p, DbTable *tbl, Eterm tid, Eterm pattern, Eterm *ret) { + mtraversal_select_count_context_t scnt_context = {0}; + Sint iterations_left = MAX_SELECT_COUNT_ITERATIONS; + Sint chunk_size = 0; + + scnt_context.p = p; + scnt_context.tb = &tbl->hash; + scnt_context.tid = tid; + scnt_context.hp = NULL; + scnt_context.prev_continuation_tptr = NULL; + + return match_traverse( + scnt_context.p, scnt_context.tb, + pattern, chunk_size, + iterations_left, NULL, 0, + mtraversal_select_count_on_nothing_can_match, + mtraversal_select_count_on_match_res, + mtraversal_select_count_on_loop_ended, + mtraversal_select_count_on_trap, + &scnt_context, ret); +} + +/* + * This is called when select_count traps + */ +static int db_select_count_continue_hash(Process* p, DbTable* tbl, Eterm continuation, Eterm* ret) { + mtraversal_select_count_context_t scnt_context = {0}; + Eterm* tptr = NULL; + Eterm tid = NIL; + Binary* mp = NULL; + Sint got = 0; + Sint slot_ix = 0; + Sint chunk_size = 0; + *ret = NIL; + + if (unpack_simple_mtraversal_continuation(continuation, &tptr, &tid, &slot_ix, &mp, &got)) { + return DB_ERROR_BADPARAM; } -done: - BUMP_REDS(p, 1000 - num_left); - RET_TO_BIF(erts_make_integer(got,p),DB_ERROR_NONE); -trap: - BUMP_ALL_REDS(p); - if (IS_USMALL(0, got)) { - hp = HAlloc(p, 5); - egot = make_small(got); + + scnt_context.p = p; + scnt_context.tb = &tbl->hash; + scnt_context.tid = tid; + scnt_context.hp = NULL; + scnt_context.prev_continuation_tptr = tptr; + + return match_traverse_continue( + scnt_context.p, scnt_context.tb, chunk_size, + MAX_SELECT_COUNT_ITERATIONS, + NULL, slot_ix, got, &mp, 0, + mtraversal_select_count_on_match_res, /* Reuse callback */ + mtraversal_select_count_on_loop_ended, /* Reuse callback */ + mtraversal_select_count_on_trap, /* Reuse callback */ + &scnt_context, ret); +} + +#undef MAX_SELECT_COUNT_ITERATIONS + + +/* + * + * select_delete match traversal + * + */ + +#define MAX_SELECT_DELETE_ITERATIONS 1000 + +typedef struct { + Process* p; + DbTableHash* tb; + Eterm tid; + Eterm* hp; + Eterm* prev_continuation_tptr; + erts_aint_t fixated_by_me; + Uint last_pseudo_delete; +} mtraversal_select_delete_context_t; + +static int mtraversal_select_delete_on_nothing_can_match(void* context_ptr, Eterm* ret) { + *ret = make_small(0); + return DB_ERROR_NONE; +} + +static int mtraversal_select_delete_on_match_res(void* context_ptr, Sint slot_ix, + HashDbTerm*** current_ptr_ptr, + Eterm match_res) +{ + HashDbTerm** current_ptr = *current_ptr_ptr; + mtraversal_select_delete_context_t* sd_context_ptr = (mtraversal_select_delete_context_t*) context_ptr; + HashDbTerm* del = NULL; + if (match_res != am_true) + return 0; + + if (NFIXED(sd_context_ptr->tb) > sd_context_ptr->fixated_by_me) { /* fixated by others? */ + if (slot_ix != sd_context_ptr->last_pseudo_delete) { + if (!add_fixed_deletion(sd_context_ptr->tb, slot_ix, sd_context_ptr->fixated_by_me)) + goto do_erase; + sd_context_ptr->last_pseudo_delete = slot_ix; + } + (*current_ptr)->hvalue = INVALID_HASH; } else { - hp = HAlloc(p, BIG_UINT_HEAP_SIZE + 5); - egot = uint_to_big(got, hp); - hp += BIG_UINT_HEAP_SIZE; + do_erase: + del = *current_ptr; + *current_ptr = (*current_ptr)->next; // replace pointer to term using next + free_term(sd_context_ptr->tb, del); } - continuation = TUPLE4(hp, tptr[1], make_small(slot_ix), - tptr[3], - egot); - RET_TO_BIF(bif_trap1(&ets_select_count_continue_exp, p, - continuation), - DB_ERROR_NONE); + erts_smp_atomic_dec_nob(&sd_context_ptr->tb->common.nitems); -#undef RET_TO_BIF + return 1; +} +static int mtraversal_select_delete_on_loop_ended(void* context_ptr, Sint slot_ix, Sint got, + Sint iterations_left, Binary** mpp, Eterm* ret) +{ + mtraversal_select_delete_context_t* sd_context_ptr = (mtraversal_select_delete_context_t*) context_ptr; + ASSERT(iterations_left <= MAX_SELECT_DELETE_ITERATIONS); + BUMP_REDS(sd_context_ptr->p, MAX_SELECT_DELETE_ITERATIONS - iterations_left); + if (got) { + try_shrink(sd_context_ptr->tb); + } + *ret = erts_make_integer(got, sd_context_ptr->p); + return DB_ERROR_NONE; } - + +static int mtraversal_select_delete_on_trap(void* context_ptr, Sint slot_ix, Sint got, + Binary** mpp, Eterm* ret) +{ + mtraversal_select_delete_context_t* sd_context_ptr = (mtraversal_select_delete_context_t*) context_ptr; + return on_mtraversal_simple_trap( + &ets_select_delete_continue_exp, + sd_context_ptr->p, + sd_context_ptr->tb, + sd_context_ptr->tid, + sd_context_ptr->prev_continuation_tptr, + slot_ix, got, mpp, ret); +} + +static int db_select_delete_hash(Process *p, DbTable *tbl, Eterm tid, Eterm pattern, Eterm *ret) { + mtraversal_select_delete_context_t sd_context = {0}; + Sint chunk_size = 0; + + sd_context.p = p; + sd_context.tb = &tbl->hash; + sd_context.tid = tid; + sd_context.hp = NULL; + sd_context.prev_continuation_tptr = NULL; +#ifdef ERTS_SMP + sd_context.fixated_by_me = sd_context.tb->common.is_thread_safe ? 0 : 1; /* TODO: something nicer */ +#else + sd_context.fixated_by_me = 0; +#endif + sd_context.last_pseudo_delete = (Uint) -1; + + return match_traverse( + sd_context.p, sd_context.tb, pattern, chunk_size, + MAX_SELECT_DELETE_ITERATIONS, NULL, 1, + mtraversal_select_delete_on_nothing_can_match, + mtraversal_select_delete_on_match_res, + mtraversal_select_delete_on_loop_ended, + mtraversal_select_delete_on_trap, + &sd_context, ret); +} + +/* + * This is called when select_delete traps + */ +static int db_select_delete_continue_hash(Process* p, DbTable* tbl, Eterm continuation, Eterm* ret) { + mtraversal_select_delete_context_t sd_context = {0}; + Eterm* tptr = NULL; + Eterm tid = NIL; + Binary* mp = NULL; + Sint got = 0; + Sint slot_ix = 0; + Sint chunk_size = 0; + *ret = NIL; + + if (unpack_simple_mtraversal_continuation(continuation, &tptr, &tid, &slot_ix, &mp, &got)) { + return DB_ERROR_BADPARAM; + } + + sd_context.p = p; + sd_context.tb = &tbl->hash; + sd_context.tid = tid; + sd_context.hp = NULL; + sd_context.prev_continuation_tptr = tptr; + sd_context.fixated_by_me = ONLY_WRITER(p, sd_context.tb) ? 0 : 1; /* TODO: something nicer */ + sd_context.last_pseudo_delete = (Uint) -1; + + return match_traverse_continue( + sd_context.p, sd_context.tb, chunk_size, + MAX_SELECT_DELETE_ITERATIONS, + NULL, slot_ix, got, &mp, 1, + mtraversal_select_delete_on_match_res, /* Reuse callback */ + mtraversal_select_delete_on_loop_ended, /* Reuse callback */ + mtraversal_select_delete_on_trap, /* Reuse callback */ + &sd_context, ret); +} + +#undef MAX_SELECT_DELETE_ITERATIONS + + +/* + * + * select_replace match traversal + * + */ + +#define MAX_SELECT_REPLACE_ITERATIONS 1000 + +typedef struct { + Process* p; + DbTableHash* tb; + Eterm tid; + Eterm* hp; + Eterm* prev_continuation_tptr; +} mtraversal_select_replace_context_t; + +static int mtraversal_select_replace_on_nothing_can_match(void* context_ptr, Eterm* ret) { + *ret = make_small(0); + return DB_ERROR_NONE; +} + +static int mtraversal_select_replace_on_match_res(void* context_ptr, Sint slot_ix, + HashDbTerm*** current_ptr_ptr, + Eterm match_res) +{ + mtraversal_select_replace_context_t* sr_context_ptr = (mtraversal_select_replace_context_t*) context_ptr; + DbTableHash* tb = sr_context_ptr->tb; + Eterm key = NIL; + HashDbTerm* new = NULL; + HashDbTerm* next = NULL; + HashValue hval = INVALID_HASH; + + if (is_value(match_res) && + is_value(key = db_getkey(tb->common.keypos, match_res)) && + eq(key, GETKEY(tb, (**current_ptr_ptr)->dbterm.tpl))) + { + next = (**current_ptr_ptr)->next; + hval = (**current_ptr_ptr)->hvalue; + new = replace_dbterm(tb, **current_ptr_ptr, match_res); + new->next = next; + new->hvalue = hval; + **current_ptr_ptr = new; /* replace 'next' pointer in previous object */ + *current_ptr_ptr = &((**current_ptr_ptr)->next); /* advance to next object */ + return 1; + } + return 0; +} + +static int mtraversal_select_replace_on_loop_ended(void* context_ptr, Sint slot_ix, Sint got, + Sint iterations_left, Binary** mpp, Eterm* ret) +{ + mtraversal_select_replace_context_t* sr_context_ptr = (mtraversal_select_replace_context_t*) context_ptr; + ASSERT(iterations_left <= MAX_SELECT_REPLACE_ITERATIONS); + /* the more objects we've replaced, the more reductions we've consumed */ + BUMP_REDS(sr_context_ptr->p, + MIN(MAX_SELECT_REPLACE_ITERATIONS * 2, + (MAX_SELECT_REPLACE_ITERATIONS - iterations_left) + (int)got)); + *ret = erts_make_integer(got, sr_context_ptr->p); + return DB_ERROR_NONE; +} + +static int mtraversal_select_replace_on_trap(void* context_ptr, Sint slot_ix, Sint got, + Binary** mpp, Eterm* ret) +{ + mtraversal_select_replace_context_t* sr_context_ptr = (mtraversal_select_replace_context_t*) context_ptr; + return on_mtraversal_simple_trap( + &ets_select_replace_continue_exp, + sr_context_ptr->p, + sr_context_ptr->tb, + sr_context_ptr->tid, + sr_context_ptr->prev_continuation_tptr, + slot_ix, got, mpp, ret); +} + +static int db_select_replace_hash(Process *p, DbTable *tbl, Eterm pattern, Eterm *ret) +{ + mtraversal_select_replace_context_t sr_context = {0}; + Sint chunk_size = 0; + + /* Bag implementation presented both semantic consistency and performance issues, + * unsupported for now + */ + ASSERT(!(tb->common.status & DB_BAG)); + + sr_context.p = p; + sr_context.tb = &tbl->hash; + sr_context.tid = NIL; // TODO + sr_context.hp = NULL; + sr_context.prev_continuation_tptr = NULL; + + return match_traverse( + sr_context.p, sr_context.tb, pattern, chunk_size, + MAX_SELECT_REPLACE_ITERATIONS, NULL, 1, + mtraversal_select_replace_on_nothing_can_match, + mtraversal_select_replace_on_match_res, + mtraversal_select_replace_on_loop_ended, + mtraversal_select_replace_on_trap, + &sr_context, ret); +} + +/* + * This is called when select_replace traps + */ +static int db_select_replace_continue_hash(Process* p, DbTable* tbl, Eterm continuation, Eterm* ret) +{ + mtraversal_select_replace_context_t sr_context = {0}; + Eterm* tptr = NULL; + Eterm tid = NIL; + Binary* mp = NULL; + Sint got = 0; + Sint slot_ix = 0; + Sint chunk_size = 0; + *ret = NIL; + + if (unpack_simple_mtraversal_continuation(continuation, &tptr, &tid, &slot_ix, &mp, &got)) { + return DB_ERROR_BADPARAM; + } + + /* Proceed */ + sr_context.p = p; + sr_context.tb = &tbl->hash; + sr_context.tid = tid; + sr_context.hp = NULL; + sr_context.prev_continuation_tptr = tptr; + + return match_traverse_continue( + sr_context.p, sr_context.tb, chunk_size, + MAX_SELECT_REPLACE_ITERATIONS, + NULL, slot_ix, got, &mp, 1, + mtraversal_select_replace_on_match_res, /* Reuse callback */ + mtraversal_select_replace_on_loop_ended, /* Reuse callback */ + mtraversal_select_replace_on_trap, /* Reuse callback */ + &sr_context, ret); +} + + static int db_take_hash(Process *p, DbTable *tbl, Eterm key, Eterm *ret) { DbTableHash *tb = &tbl->hash; @@ -2001,245 +2274,6 @@ static int db_take_hash(Process *p, DbTable *tbl, Eterm key, Eterm *ret) return DB_ERROR_NONE; } -static int db_select_replace_hash(Process *p, - DbTable *tbl, - Eterm pattern, - Eterm *ret) -{ - DbTableHash *tb = &tbl->hash; - struct mp_info mpi; - Uint slot_ix = 0; - HashDbTerm **current = NULL; - HashDbTerm *new = NULL, *next = NULL; - HashValue hval = INVALID_HASH; - unsigned current_list_pos = 0; - Eterm key; - Eterm match_res; - Eterm *hp; - int num_left = 1000; - Uint got = 0; - Eterm continuation; - int errcode; - Eterm mpb; - Eterm egot; - erts_smp_rwmtx_t* lck; - -#define RET_TO_BIF(Term,RetVal) do { \ - if (mpi.mp != NULL) { \ - erts_bin_free(mpi.mp); \ - } \ - if (mpi.lists != mpi.dlists) { \ - erts_free(ERTS_ALC_T_DB_SEL_LIST, \ - (void *) mpi.lists); \ - } \ - *ret = (Term); \ - return RetVal; \ - } while(0) - - /* Bag implementation presented both semantic consistency and performance issues */ - ASSERT(!(tb->common.status & DB_BAG)); - - if ((errcode = analyze_pattern(tb, pattern, &mpi)) != DB_ERROR_NONE) { - RET_TO_BIF(NIL,errcode); - } - - if (!mpi.something_can_match) { - RET_TO_BIF(make_small(0), DB_ERROR_NONE); - /* can't possibly match anything */ - } - - if (!mpi.key_given) { - /* Run this code if pattern is variable or GETKEY(pattern) */ - /* is a variable */ - lck = WLOCK_HASH(tb,slot_ix); - current = &BUCKET(tb,slot_ix); - } else { - /* We have at least one */ - slot_ix = mpi.lists[current_list_pos].ix; - lck = WLOCK_HASH(tb, slot_ix); - current = mpi.lists[current_list_pos++].bucket; - ASSERT(*current == BUCKET(tb,slot_ix)); - } - - - for(;;) { - if ((*current) == NULL) { - if (mpi.key_given) { /* Key is bound */ - WUNLOCK_HASH(lck); - if (current_list_pos == mpi.num_lists) { - goto done; - } else { - slot_ix = mpi.lists[current_list_pos].ix; - lck = WLOCK_HASH(tb, slot_ix); - current = mpi.lists[current_list_pos].bucket; - ASSERT(mpi.lists[current_list_pos].bucket == &BUCKET(tb,slot_ix)); - ++current_list_pos; - } - } else { - if ((slot_ix=next_slot_w(tb,slot_ix,&lck)) == 0) { - goto done; - } - if (num_left <= 0) { - WUNLOCK_HASH(lck); - goto trap; - } - current = &BUCKET(tb,slot_ix); - } - } - else if ((*current)->hvalue == INVALID_HASH) { - current = &((*current)->next); - } - else { - match_res = db_match_dbterm(&tb->common, p, mpi.mp, 0, - &(*current)->dbterm, NULL, 0); - if (is_value(match_res) && - is_value(key = db_getkey(tb->common.keypos, match_res)) && - eq(key, GETKEY(tb, (*current)->dbterm.tpl))) - { - next = (*current)->next; - hval = (*current)->hvalue; - new = replace_dbterm(tb, *current, match_res); - new->next = next; - new->hvalue = hval; - *current = new; - ++got; - } - --num_left; - current = &((*current)->next); - } - } -done: - // the more objects we've replaced, the more reductions we've consumed - BUMP_REDS(p, MIN(2000, (1000 - num_left) + (int)got)); - RET_TO_BIF(erts_make_integer(got,p),DB_ERROR_NONE); -trap: - BUMP_ALL_REDS(p); - if (IS_USMALL(0, got)) { - hp = HAlloc(p, PROC_BIN_SIZE + 5); - egot = make_small(got); - } - else { - hp = HAlloc(p, BIG_UINT_HEAP_SIZE + PROC_BIN_SIZE + 5); - egot = uint_to_big(got, hp); - hp += BIG_UINT_HEAP_SIZE; - } - mpb = db_make_mp_binary(p,mpi.mp,&hp); - continuation = TUPLE4(hp, tb->common.id, make_small(slot_ix), - mpb, - egot); - mpi.mp = NULL; /*otherwise the return macro will destroy it */ - RET_TO_BIF(bif_trap1(&ets_select_replace_continue_exp, p, - continuation), - DB_ERROR_NONE); - -#undef RET_TO_BIF - -} - -/* -** This is called when select_replace traps -*/ -static int db_select_replace_continue_hash(Process *p, - DbTable *tbl, - Eterm continuation, - Eterm *ret) -{ - DbTableHash *tb = &tbl->hash; - Uint slot_ix; - HashDbTerm **current = NULL; - HashDbTerm *new = NULL, *next = NULL; - HashValue hval = INVALID_HASH; - Eterm key; - Eterm match_res; - Eterm *hp; - int num_left = 1000; - Uint got, prev_got; - Eterm *tptr; - Binary *mp; - Eterm egot; - erts_smp_rwmtx_t* lck; - -#define RET_TO_BIF(Term,RetVal) do { \ - *ret = (Term); \ - return RetVal; \ - } while(0) - - - tptr = tuple_val(continuation); - slot_ix = unsigned_val(tptr[2]); - mp = ((ProcBin *) binary_val(tptr[3]))->val; - if (is_big(tptr[4])) { - got = big_to_uint32(tptr[4]); - } else { - got = unsigned_val(tptr[4]); - } - prev_got = got; - - lck = WLOCK_HASH(tb,slot_ix); - if (slot_ix >= NACTIVE(tb)) { - WUNLOCK_HASH(lck); - goto done; - } - current = &BUCKET(tb,slot_ix); - - for(;;) { - if ((*current) == NULL) { - if ((slot_ix=next_slot_w(tb,slot_ix,&lck)) == 0) { - goto done; - } - if (num_left <= 0) { - WUNLOCK_HASH(lck); - goto trap; - } - current = &BUCKET(tb,slot_ix); - } - else if ((*current)->hvalue == INVALID_HASH) { - current = &((*current)->next); - } - else { - match_res = db_match_dbterm(&tb->common, p, mp, 0, - &(*current)->dbterm, NULL, 0); - if (is_value(match_res) && - is_value(key = db_getkey(tb->common.keypos, match_res)) && - eq(key, GETKEY(tb, (*current)->dbterm.tpl))) - { - next = (*current)->next; - hval = (*current)->hvalue; - new = replace_dbterm(tb, *current, match_res); - new->next = next; - new->hvalue = hval; - *current = new; - ++got; - } - --num_left; - current = &((*current)->next); - } - } -done: - // the more objects we've replaced, the more reductions we've consumed - BUMP_REDS(p, MIN(2000, (1000 - num_left) + (int)(got - prev_got))); - RET_TO_BIF(erts_make_integer(got,p),DB_ERROR_NONE); -trap: - BUMP_ALL_REDS(p); - if (IS_USMALL(0, got)) { - hp = HAlloc(p, 5); - egot = make_small(got); - } - else { - hp = HAlloc(p, BIG_UINT_HEAP_SIZE + 5); - egot = uint_to_big(got, hp); - hp += BIG_UINT_HEAP_SIZE; - } - continuation = TUPLE4(hp, tb->common.id, make_small(slot_ix), - tptr[3], - egot); - RET_TO_BIF(bif_trap1(&ets_select_replace_continue_exp, p, - continuation), - DB_ERROR_NONE); - -#undef RET_TO_BIF - -} /* ** 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 af1296367a..83cbf059c5 100644 --- a/erts/emulator/beam/erl_db_tree.c +++ b/erts/emulator/beam/erl_db_tree.c @@ -1843,6 +1843,7 @@ static int db_select_replace_tree(Process *p, DbTable *tbl, Eterm pattern, Eterm *ret) { DbTableTree *tb = &tbl->tree; + Eterm tid = NIL; // TODO DbTreeStack* stack; struct select_replace_context sc; struct mp_info mpi; @@ -1937,7 +1938,7 @@ static int db_select_replace_tree(Process *p, DbTable *tbl, continuation = TUPLE5 (hp, - tb->common.id, + tid, key, sc.end_condition, /* From the match program, needn't be copied */ mpb, |