/************************************************************************ ** ** ** The YapTab/YapOr/OPTYap systems ** ** ** ** YapTab extends the Yap Prolog engine to support sequential tabling ** ** YapOr extends the Yap Prolog engine to support or-parallelism ** ** OPTYap extends the Yap Prolog engine to support or-parallel tabling ** ** ** ** ** ** Yap Prolog was developed at University of Porto, Portugal ** ** ** ************************************************************************/ /************************************ ** Includes & Prototypes ** ************************************/ #include "Yap.h" #ifdef TABLING #include "Yatom.h" #include "YapHeap.h" #include "eval.h" #include "tab.macros.h" static inline sg_node_ptr subgoal_trie_check_insert_entry(tab_ent_ptr, sg_node_ptr, Term USES_REGS); static inline sg_node_ptr subgoal_trie_check_insert_gt_entry(tab_ent_ptr, sg_node_ptr, Term USES_REGS); static inline ans_node_ptr answer_trie_check_insert_entry(sg_fr_ptr, ans_node_ptr, Term, int USES_REGS); static inline ans_node_ptr answer_trie_check_insert_gt_entry(sg_fr_ptr, ans_node_ptr, Term, int USES_REGS); static inline gt_node_ptr global_trie_check_insert_entry(gt_node_ptr, Term USES_REGS); #ifdef GLOBAL_TRIE_FOR_SUBTERMS static inline gt_node_ptr global_trie_check_insert_gt_entry(gt_node_ptr, Term USES_REGS); #endif /* GLOBAL_TRIE_FOR_SUBTERMS */ static inline sg_node_ptr subgoal_search_loop(tab_ent_ptr, sg_node_ptr, Term, int *, CELL **USES_REGS); static inline sg_node_ptr subgoal_search_terms_loop(tab_ent_ptr, sg_node_ptr, Term, int *, CELL **USES_REGS); static inline ans_node_ptr answer_search_loop(sg_fr_ptr, ans_node_ptr, Term, int *USES_REGS); static inline ans_node_ptr answer_search_terms_loop(sg_fr_ptr, ans_node_ptr, Term, int *USES_REGS); #ifdef GLOBAL_TRIE_FOR_SUBTERMS static inline gt_node_ptr subgoal_search_global_trie_terms_loop(Term, int *, CELL **, CELL *USES_REGS); static inline gt_node_ptr answer_search_global_trie_terms_loop(Term, int *, CELL *USES_REGS); #else static inline gt_node_ptr subgoal_search_global_trie_loop(Term, int *, CELL **USES_REGS); static inline gt_node_ptr answer_search_global_trie_loop(Term, int *USES_REGS); #endif /* GLOBAL_TRIE_MODE */ static inline CELL *load_answer_loop(ans_node_ptr USES_REGS); static inline CELL *load_substitution_loop(gt_node_ptr, int *, CELL *USES_REGS); static inline CELL *exec_substitution_loop(gt_node_ptr, CELL **, CELL *USES_REGS); #ifdef MODE_DIRECTED_TABLING static inline ans_node_ptr answer_search_min_max(sg_fr_ptr, ans_node_ptr, Term, int USES_REGS); static inline ans_node_ptr answer_search_sum(sg_fr_ptr, ans_node_ptr, Term USES_REGS); static void invalidate_answer_trie(ans_node_ptr, sg_fr_ptr, int USES_REGS); #endif /* MODE_DIRECTED_TABLING */ #ifdef YAPOR #ifdef TABLING_INNER_CUTS static int update_answer_trie_branch(ans_node_ptr, ans_node_ptr); #else /* YAPOR && ! TABLING_INNER_CUTS */ static int update_answer_trie_branch(ans_node_ptr); #endif #else /* ! YAPOR */ static void update_answer_trie_branch(ans_node_ptr, int); #endif #ifdef GLOBAL_TRIE_FOR_SUBTERMS static void free_global_trie_branch(gt_node_ptr, int USES_REGS); #else static void free_global_trie_branch(gt_node_ptr USES_REGS); #endif /* GLOBAL_TRIE_FOR_SUBTERMS */ static void traverse_subgoal_trie(sg_node_ptr, char *, int, int *, int, int USES_REGS); static void traverse_answer_trie(ans_node_ptr, char *, int, int *, int, int, int USES_REGS); static void traverse_global_trie(gt_node_ptr, char *, int, int *, int, int USES_REGS); static void traverse_global_trie_for_term(gt_node_ptr, char *, int *, int *, int *, int USES_REGS); static inline void traverse_trie_node(Term, char *, int *, int *, int *, int USES_REGS); static inline void traverse_update_arity(char *, int *, int *); /******************************* ** Structs & Macros ** *******************************/ static struct trie_statistics { FILE *out; int show; long subgoals; long subgoals_incomplete; long subgoal_trie_nodes; long answers; #ifdef TABLING_INNER_CUTS long answers_pruned; #endif /* TABLING_INNER_CUTS */ long answers_true; long answers_no; long answer_trie_nodes; long global_trie_terms; long global_trie_nodes; long global_trie_references; } #ifdef THREADS trie_stats[MAX_THREADS]; #define TrStat_out trie_stats[worker_id].out #define TrStat_show trie_stats[worker_id].show #define TrStat_subgoals trie_stats[worker_id].subgoals #define TrStat_sg_incomplete trie_stats[worker_id].subgoals_incomplete #define TrStat_sg_nodes trie_stats[worker_id].subgoal_trie_nodes #define TrStat_answers trie_stats[worker_id].answers #define TrStat_answers_true trie_stats[worker_id].answers_true #define TrStat_answers_no trie_stats[worker_id].answers_no #define TrStat_answers_pruned trie_stats[worker_id].answers_pruned #define TrStat_ans_nodes trie_stats[worker_id].answer_trie_nodes #define TrStat_gt_terms trie_stats[worker_id].global_trie_terms #define TrStat_gt_nodes trie_stats[worker_id].global_trie_nodes #define TrStat_gt_refs trie_stats[worker_id].global_trie_references #else /*!THREADS */ trie_stats; #define TrStat_out trie_stats.out #define TrStat_show trie_stats.show #define TrStat_subgoals trie_stats.subgoals #define TrStat_sg_incomplete trie_stats.subgoals_incomplete #define TrStat_sg_nodes trie_stats.subgoal_trie_nodes #define TrStat_answers trie_stats.answers #define TrStat_answers_true trie_stats.answers_true #define TrStat_answers_no trie_stats.answers_no #define TrStat_answers_pruned trie_stats.answers_pruned #define TrStat_ans_nodes trie_stats.answer_trie_nodes #define TrStat_gt_terms trie_stats.global_trie_terms #define TrStat_gt_nodes trie_stats.global_trie_nodes #define TrStat_gt_refs trie_stats.global_trie_references #endif /*THREADS */ #if defined(THREADS_SUBGOAL_SHARING) || defined(THREADS_FULL_SHARING) || \ defined(THREADS_CONSUMER_SHARING) #define IF_ABOLISH_SUBGOAL_TRIE_SHARED_DATA_STRUCTURES \ if (GLOBAL_NOfThreads == 1) #else #define IF_ABOLISH_SUBGOAL_TRIE_SHARED_DATA_STRUCTURES #endif /* THREADS_SUBGOAL_SHARING || THREADS_FULL_SHARING || \ THREADS_CONSUMER_SHARING */ #if defined(THREADS_FULL_SHARING) || defined(THREADS_CONSUMER_SHARING) #define IF_ABOLISH_ANSWER_TRIE_SHARED_DATA_STRUCTURES \ if (GLOBAL_NOfThreads == 1) #else #define IF_ABOLISH_ANSWER_TRIE_SHARED_DATA_STRUCTURES #endif /* THREADS_FULL_SHARING || THREADS_CONSUMER_SHARING */ #define SHOW_TABLE_STR_ARRAY_SIZE 100000 #define SHOW_TABLE_ARITY_ARRAY_SIZE 10000 #define SHOW_TABLE_STRUCTURE(MESG, ARGS...) \ if (TrStat_show == SHOW_MODE_STRUCTURE) \ fprintf(TrStat_out, MESG, ##ARGS) #define CHECK_DECREMENT_GLOBAL_TRIE_REFERENCE(REF, MODE) \ if (MODE == TRAVERSE_MODE_NORMAL && IsVarTerm(REF) && \ REF > VarIndexOfTableTerm(MAX_TABLE_VARS)) { \ register gt_node_ptr gt_node = (gt_node_ptr)(REF); \ TrNode_child(gt_node) = \ (gt_node_ptr)((uintptr_t)TrNode_child(gt_node) - 1); \ if (TrNode_child(gt_node) == 0) \ FREE_GLOBAL_TRIE_BRANCH(gt_node, TRAVERSE_MODE_NORMAL); \ } #ifdef GLOBAL_TRIE_FOR_SUBTERMS #define CHECK_DECREMENT_GLOBAL_TRIE_FOR_SUBTERMS_REFERENCE(REF, MODE) \ CHECK_DECREMENT_GLOBAL_TRIE_REFERENCE(REF, MODE) #define FREE_GLOBAL_TRIE_BRANCH(NODE, MODE) \ free_global_trie_branch(NODE, MODE PASS_REGS) #else #define CHECK_DECREMENT_GLOBAL_TRIE_FOR_SUBTERMS_REFERENCE(REF, MODE) #define FREE_GLOBAL_TRIE_BRANCH(NODE, MODE) \ free_global_trie_branch(NODE PASS_REGS) #endif /* GLOBAL_TRIE_FOR_SUBTERMS */ /****************************** ** Rational Terms Support ** ******************************/ #ifdef TRIE_RATIONAL_TERMS #include "tab.rational.h" #endif /* RATIONAL TERM SUPPORT FOR TRIES */ /****************************** ** Local functions ** ******************************/ #define INCLUDE_SUBGOAL_TRIE_CHECK_INSERT /* subgoal_trie_check_insert_entry \ */ #define INCLUDE_ANSWER_TRIE_CHECK_INSERT /* answer_trie_check_insert_entry */ #define INCLUDE_GLOBAL_TRIE_CHECK_INSERT /* global_trie_check_insert_entry */ #include "tab.tries.h" #undef INCLUDE_GLOBAL_TRIE_CHECK_INSERT #undef INCLUDE_ANSWER_TRIE_CHECK_INSERT #undef INCLUDE_SUBGOAL_TRIE_CHECK_INSERT #define MODE_GLOBAL_TRIE_ENTRY #define INCLUDE_SUBGOAL_TRIE_CHECK_INSERT /* subgoal_trie_check_insert_gt_entry \ */ #define INCLUDE_ANSWER_TRIE_CHECK_INSERT /* answer_trie_check_insert_gt_entry \ */ #ifdef GLOBAL_TRIE_FOR_SUBTERMS #define INCLUDE_GLOBAL_TRIE_CHECK_INSERT /* global_trie_check_insert_gt_entry \ */ #endif /* GLOBAL_TRIE_FOR_SUBTERMS */ #include "tab.tries.h" #undef INCLUDE_GLOBAL_TRIE_CHECK_INSERT #undef INCLUDE_ANSWER_TRIE_CHECK_INSERT #undef INCLUDE_SUBGOAL_TRIE_CHECK_INSERT #undef MODE_GLOBAL_TRIE_ENTRY #define INCLUDE_SUBGOAL_SEARCH_LOOP /* subgoal_search_loop */ #define INCLUDE_ANSWER_SEARCH_LOOP /* answer_search_loop */ #define INCLUDE_LOAD_ANSWER_LOOP /* load_answer_loop */ #include "tab.tries.h" #undef INCLUDE_LOAD_ANSWER_LOOP #undef INCLUDE_ANSWER_SEARCH_LOOP #undef INCLUDE_SUBGOAL_SEARCH_LOOP #define MODE_TERMS_LOOP #define INCLUDE_SUBGOAL_SEARCH_LOOP /* subgoal_search_terms_loop */ #define INCLUDE_ANSWER_SEARCH_LOOP /* answer_search_terms_loop */ #ifdef TRIE_RATIONAL_TERMS #undef TRIE_RATIONAL_TERMS #include "tab.tries.h" #define TRIE_RATIONAL_TERMS #else #include "tab.tries.h" #endif #undef INCLUDE_ANSWER_SEARCH_LOOP #undef INCLUDE_SUBGOAL_SEARCH_LOOP #undef MODE_TERMS_LOOP #define MODE_GLOBAL_TRIE_LOOP #define INCLUDE_SUBGOAL_SEARCH_LOOP /* subgoal_search_global_trie_(terms)_loop \ */ #define INCLUDE_ANSWER_SEARCH_LOOP /* answer_search_global_trie_(terms)_loop \ */ #define INCLUDE_LOAD_ANSWER_LOOP /* load_substitution_loop */ #ifdef TRIE_RATIONAL_TERMS #undef TRIE_RATIONAL_TERMS #include "tab.tries.h" #define TRIE_RATIONAL_TERMS #else #include "tab.tries.h" #endif #undef INCLUDE_LOAD_ANSWER_LOOP #undef INCLUDE_ANSWER_SEARCH_LOOP #undef INCLUDE_SUBGOAL_SEARCH_LOOP #undef MODE_GLOBAL_TRIE_LOOP #ifdef MODE_DIRECTED_TABLING #define INCLUDE_ANSWER_SEARCH_MODE_DIRECTED #include "tab.tries.h" /* answer_search_min_max + answer_search_sum + invalidate_answer_trie */ #undef INCLUDE_ANSWER_SEARCH_MODE_DIRECTED #endif /* MODE_DIRECTED_TABLING */ static inline CELL *exec_substitution_loop(gt_node_ptr current_node, CELL **stack_vars_ptr, CELL *stack_terms USES_REGS) { /************************************************************************ =========== | | | ... | | | ----------- YENV --> | N+1 | <-- stack_vars ----------- | VAR_N | ----------- | ... | ----------- | VAR_0 | ----------- | | | ... | | | =========== | | | ... | | | ----------- TR --> | | <-- stack_terms_limit ----------- | | | ... | | | ----------| | TERM_N | <-- stack_terms ----------| * | ... | /|\ ----------| | stack_terms_pair_offset (TRIE_COMPACT_PAIRS) | TERM_1 | \|/ =========== * LOCAL_TrailTop --> | | <-- stack_terms_base (TRIE_COMPACT_PAIRS) ----------- ************************************************************************/ CELL *stack_vars = *stack_vars_ptr; CELL *stack_terms_limit = (CELL *)TR; #ifdef TRIE_COMPACT_PAIRS #define stack_terms_base ((CELL *)LOCAL_TrailTop) int stack_terms_pair_offset = 0; #endif /* TRIE_COMPACT_PAIRS */ Term t = TrNode_entry(current_node); current_node = TrNode_parent(current_node); do { if (IsVarTerm(t)) { #ifdef GLOBAL_TRIE_FOR_SUBTERMS if (t > VarIndexOfTableTerm(MAX_TABLE_VARS)) { stack_terms = exec_substitution_loop((gt_node_ptr)t, &stack_vars, stack_terms PASS_REGS); } else #endif /* GLOBAL_TRIE_FOR_SUBTERMS */ { int var_index = VarIndexOfTableTerm(t); int vars_arity = *stack_vars; t = MkVarTerm(); if (var_index >= vars_arity) { while (vars_arity < var_index) { *stack_vars-- = 0; vars_arity++; } *stack_vars-- = t; vars_arity++; *stack_vars = vars_arity; } else { /* do the same as in macro stack_trie_val_instr() */ CELL aux_sub, aux_var, *vars_ptr; vars_ptr = stack_vars + vars_arity - var_index; aux_sub = *((CELL *)t); aux_var = *vars_ptr; if (aux_var == 0) { *vars_ptr = t; } else { if (aux_sub > aux_var) { if ((CELL *)aux_sub <= HR) { Bind_Global((CELL *)aux_sub, aux_var); } else if ((CELL *)aux_var <= HR) { Bind_Local((CELL *)aux_sub, aux_var); } else { Bind_Local((CELL *)aux_var, aux_sub); *vars_ptr = aux_sub; } } else { if ((CELL *)aux_var <= HR) { Bind_Global((CELL *)aux_var, aux_sub); *vars_ptr = aux_sub; } else if ((CELL *)aux_sub <= HR) { Bind_Local((CELL *)aux_var, aux_sub); *vars_ptr = aux_sub; } else { Bind_Local((CELL *)aux_sub, aux_var); } } } } AUX_STACK_CHECK_EXPAND(stack_terms, stack_terms_limit); STACK_PUSH_UP(t, stack_terms); } } else if (IsAtomOrIntTerm(t)) { AUX_STACK_CHECK_EXPAND(stack_terms, stack_terms_limit); STACK_PUSH_UP(t, stack_terms); } else if (IsPairTerm(t)) { #ifdef TRIE_COMPACT_PAIRS if (t == CompactPairInit) { Term *stack_aux = stack_terms_base - stack_terms_pair_offset; Term head, tail = STACK_POP_UP(stack_aux); while (STACK_NOT_EMPTY(stack_aux, stack_terms)) { head = STACK_POP_UP(stack_aux); tail = MkPairTerm(head, tail); } stack_terms = stack_terms_base - stack_terms_pair_offset; stack_terms_pair_offset = (int)STACK_POP_DOWN(stack_terms); STACK_PUSH_UP(tail, stack_terms); } else { /* CompactPairEndList / CompactPairEndTerm */ Term last; AUX_STACK_CHECK_EXPAND(stack_terms, stack_terms_limit + 1); last = STACK_POP_DOWN(stack_terms); STACK_PUSH_UP(stack_terms_pair_offset, stack_terms); stack_terms_pair_offset = (int)(stack_terms_base - stack_terms); if (t == CompactPairEndList) STACK_PUSH_UP(TermNil, stack_terms); STACK_PUSH_UP(last, stack_terms); } #else Term head = STACK_POP_DOWN(stack_terms); Term tail = STACK_POP_DOWN(stack_terms); t = MkPairTerm(head, tail); STACK_PUSH_UP(t, stack_terms); #endif /* TRIE_COMPACT_PAIRS */ } else if (IsApplTerm(t)) { Functor f = (Functor)RepAppl(t); if (f == FunctorDouble) { union { Term t_dbl[sizeof(Float) / sizeof(Term)]; Float dbl; } u; t = TrNode_entry(current_node); current_node = TrNode_parent(current_node); u.t_dbl[0] = t; #if SIZEOF_DOUBLE == 2 * SIZEOF_INT_P t = TrNode_entry(current_node); current_node = TrNode_parent(current_node); u.t_dbl[1] = t; #endif /* SIZEOF_DOUBLE x SIZEOF_INT_P */ current_node = TrNode_parent(current_node); t = MkFloatTerm(u.dbl); } else if (f == FunctorLongInt) { Int li = TrNode_entry(current_node); current_node = TrNode_parent(current_node); current_node = TrNode_parent(current_node); t = MkLongIntTerm(li); } else { int f_arity = ArityOfFunctor(f); t = Yap_MkApplTerm(f, f_arity, stack_terms); stack_terms += f_arity; } AUX_STACK_CHECK_EXPAND(stack_terms, stack_terms_limit); STACK_PUSH_UP(t, stack_terms); } t = TrNode_entry(current_node); current_node = TrNode_parent(current_node); } while (current_node); *stack_vars_ptr = stack_vars; return stack_terms; #ifdef TRIE_COMPACT_PAIRS #undef stack_terms_base #endif /* TRIE_COMPACT_PAIRS */ } #ifdef YAPOR #ifdef TABLING_INNER_CUTS static int update_answer_trie_branch(ans_node_ptr previous_node, ans_node_ptr current_node) { int ltt; if (!IS_ANSWER_LEAF_NODE(current_node)) { if (TrNode_child(current_node)) { TrNode_instr(TrNode_child(current_node)) -= 1; /* retry --> try */ update_answer_trie_branch(NULL, TrNode_child(current_node)); if (TrNode_child(current_node)) goto update_next_trie_branch; } /* node belonging to a pruned answer */ if (previous_node) { TrNode_next(previous_node) = TrNode_next(current_node); FREE_ANSWER_TRIE_NODE(current_node); if (TrNode_next(previous_node)) { return update_answer_trie_branch(previous_node, TrNode_next(previous_node)); } else { TrNode_instr(previous_node) -= 2; /* retry --> trust : try --> do */ return 0; } } else { TrNode_child(TrNode_parent(current_node)) = TrNode_next(current_node); if (TrNode_next(current_node)) { TrNode_instr(TrNode_next(current_node)) -= 1; /* retry --> try */ update_answer_trie_branch(NULL, TrNode_next(current_node)); } FREE_ANSWER_TRIE_NODE(current_node); return 0; } } update_next_trie_branch: if (TrNode_next(current_node)) { ltt = 1 + update_answer_trie_branch(current_node, TrNode_next(current_node)); } else { TrNode_instr(current_node) -= 2; /* retry --> trust : try --> do */ ltt = 1; } TrNode_or_arg(current_node) = ltt; TrNode_instr(current_node) = Yap_opcode(TrNode_instr(current_node)); return ltt; } #else /* YAPOR && ! TABLING_INNER_CUTS */ static int update_answer_trie_branch(ans_node_ptr current_node) { int ltt; if (!IS_ANSWER_LEAF_NODE(current_node)) { TrNode_instr(TrNode_child(current_node)) -= 1; /* retry --> try */ update_answer_trie_branch(TrNode_child(current_node)); } if (TrNode_next(current_node)) { ltt = 1 + update_answer_trie_branch(TrNode_next(current_node)); } else { TrNode_instr(current_node) -= 2; /* retry --> trust : try --> do */ ltt = 1; } TrNode_or_arg(current_node) = ltt; TrNode_instr(current_node) = Yap_opcode(TrNode_instr(current_node)); return ltt; } #endif #else /* ! YAPOR */ static void update_answer_trie_branch(ans_node_ptr current_node, int position) { if (!IS_ANSWER_LEAF_NODE(current_node)) update_answer_trie_branch(TrNode_child(current_node), TRAVERSE_POSITION_FIRST); /* retry --> try */ if (position == TRAVERSE_POSITION_FIRST) { ans_node_ptr next = TrNode_next(current_node); if (next) { while (TrNode_next(next)) { update_answer_trie_branch(next, TRAVERSE_POSITION_NEXT); /* retry --> retry */ next = TrNode_next(next); } update_answer_trie_branch(next, TRAVERSE_POSITION_LAST); /* retry --> trust */ } else position += TRAVERSE_POSITION_LAST; /* try --> do */ } TrNode_instr(current_node) = Yap_opcode(TrNode_instr(current_node) - position); return; } #endif /* YAPOR */ #ifdef GLOBAL_TRIE_FOR_SUBTERMS static void free_global_trie_branch(gt_node_ptr current_node, int mode USES_REGS) { Term t = TrNode_entry(current_node); #else static void free_global_trie_branch(gt_node_ptr current_node USES_REGS) { #endif /* GLOBAL_TRIE_FOR_SUBTERMS */ gt_node_ptr parent_node, child_node; parent_node = TrNode_parent(current_node); child_node = TrNode_child(parent_node); if (IS_GLOBAL_TRIE_HASH(child_node)) { gt_hash_ptr hash = (gt_hash_ptr)child_node; gt_node_ptr *bucket = Hash_buckets(hash) + HASH_ENTRY(TrNode_entry(current_node), Hash_num_buckets(hash)); int num_nodes = --Hash_num_nodes(hash); child_node = *bucket; if (child_node != current_node) { while (TrNode_next(child_node) != current_node) child_node = TrNode_next(child_node); TrNode_next(child_node) = TrNode_next(current_node); CHECK_DECREMENT_GLOBAL_TRIE_FOR_SUBTERMS_REFERENCE(t, mode); FREE_GLOBAL_TRIE_NODE(current_node); } else { *bucket = TrNode_next(current_node); CHECK_DECREMENT_GLOBAL_TRIE_FOR_SUBTERMS_REFERENCE(t, mode); FREE_GLOBAL_TRIE_NODE(current_node); if (num_nodes == 0) { FREE_BUCKETS(Hash_buckets(hash)); FREE_GLOBAL_TRIE_HASH(hash); if (parent_node != GLOBAL_root_gt) { #ifdef GLOBAL_TRIE_FOR_SUBTERMS if (mode == TRAVERSE_MODE_NORMAL) { if (IsApplTerm(t)) { Functor f = (Functor)RepAppl(t); if (f == FunctorDouble) mode = TRAVERSE_MODE_DOUBLE; else if (f == FunctorLongInt) mode = TRAVERSE_MODE_LONGINT; else if (f == FunctorBigInt || f == FunctorString) mode = TRAVERSE_MODE_BIGINT_OR_STRING; else mode = TRAVERSE_MODE_NORMAL; } else mode = TRAVERSE_MODE_NORMAL; } else if (mode == TRAVERSE_MODE_LONGINT) mode = TRAVERSE_MODE_LONGINT_END; } else if (mode == TRAVERSE_MODE_BIGINT_OR_STRING) mode = TRAVERSE_MODE_BIGINT_OR_STRING_END; else if (mode == TRAVERSE_MODE_DOUBLE) #if SIZEOF_DOUBLE == 2 * SIZEOF_INT_P mode = TRAVERSE_MODE_DOUBLE2; else if (mode == TRAVERSE_MODE_DOUBLE2) #endif /* SIZEOF_DOUBLE x SIZEOF_INT_P */ mode = TRAVERSE_MODE_DOUBLE_END; else mode = TRAVERSE_MODE_NORMAL; #endif /* GLOBAL_TRIE_FOR_SUBTERMS */ FREE_GLOBAL_TRIE_BRANCH(parent_node, mode); } else TrNode_child(parent_node) = NULL; } } } else if (child_node != current_node) { while (TrNode_next(child_node) != current_node) child_node = TrNode_next(child_node); TrNode_next(child_node) = TrNode_next(current_node); CHECK_DECREMENT_GLOBAL_TRIE_FOR_SUBTERMS_REFERENCE(t, mode); FREE_GLOBAL_TRIE_NODE(current_node); } else if (TrNode_next(current_node) == NULL) { CHECK_DECREMENT_GLOBAL_TRIE_FOR_SUBTERMS_REFERENCE(t, mode); FREE_GLOBAL_TRIE_NODE(current_node); if (parent_node != GLOBAL_root_gt) { #ifdef GLOBAL_TRIE_FOR_SUBTERMS if (mode == TRAVERSE_MODE_NORMAL) { if (IsApplTerm(t)) { Functor f = (Functor)RepAppl(t); if (f == FunctorDouble) mode = TRAVERSE_MODE_DOUBLE; else if (f == FunctorLongInt) mode = TRAVERSE_MODE_LONGINT; else if (f == FunctorBigInt || f == FunctorString) mode = TRAVERSE_MODE_BIGINT_OR_STRING; else mode = TRAVERSE_MODE_NORMAL; } else mode = TRAVERSE_MODE_NORMAL; } else if (mode == TRAVERSE_MODE_LONGINT) { mode = TRAVERSE_MODE_LONGINT_END; } else if (mode == TRAVERSE_MODE_BIGINT_OR_STRING) { mode = TRAVERSE_MODE_BIGINT_OR_STRING_END; } else if (mode == TRAVERSE_MODE_DOUBLE) #if SIZEOF_DOUBLE == 2 * SIZEOF_INT_P mode = TRAVERSE_MODE_DOUBLE2; else if (mode == TRAVERSE_MODE_DOUBLE2) #endif /* SIZEOF_DOUBLE x SIZEOF_INT_P */ mode = TRAVERSE_MODE_DOUBLE_END; else mode = TRAVERSE_MODE_NORMAL; #endif /* GLOBAL_TRIE_FOR_SUBTERMS */ FREE_GLOBAL_TRIE_BRANCH(parent_node, mode); } else TrNode_child(parent_node) = NULL; } else { TrNode_child(parent_node) = TrNode_next(current_node); CHECK_DECREMENT_GLOBAL_TRIE_FOR_SUBTERMS_REFERENCE(t, mode); FREE_GLOBAL_TRIE_NODE(current_node); } return; } static void traverse_subgoal_trie(sg_node_ptr current_node, char *str, int str_index, int *arity, int mode, int position USES_REGS) { int *current_arity = NULL, current_str_index = 0, current_mode = 0; /* test if hashing */ if (IS_SUBGOAL_TRIE_HASH(current_node)) { sg_node_ptr *bucket, *last_bucket; sg_hash_ptr hash; hash = (sg_hash_ptr)current_node; bucket = Hash_buckets(hash); last_bucket = bucket + Hash_num_buckets(hash); current_arity = (int *)malloc(sizeof(int) * (arity[0] + 1)); memcpy(current_arity, arity, sizeof(int) * (arity[0] + 1)); do { if (*bucket) { traverse_subgoal_trie(*bucket, str, str_index, arity, mode, TRAVERSE_POSITION_FIRST PASS_REGS); memcpy(arity, current_arity, sizeof(int) * (current_arity[0] + 1)); #ifdef TRIE_COMPACT_PAIRS if (arity[arity[0]] == -2 && str[str_index - 1] != '[') str[str_index - 1] = ','; #else if (arity[arity[0]] == -1) str[str_index - 1] = '|'; #endif /* TRIE_COMPACT_PAIRS */ } } while (++bucket != last_bucket); free(current_arity); return; } /* save current state if first sibling node */ if (position == TRAVERSE_POSITION_FIRST) { current_arity = (int *)malloc(sizeof(int) * (arity[0] + 1)); memcpy(current_arity, arity, sizeof(int) * (arity[0] + 1)); current_str_index = str_index; current_mode = mode; } /* process current trie node */ TrStat_sg_nodes++; traverse_trie_node(TrNode_entry(current_node), str, &str_index, arity, &mode, TRAVERSE_TYPE_SUBGOAL PASS_REGS); /* show answers ... */ if (IS_SUBGOAL_LEAF_NODE(current_node)) { sg_fr_ptr sg_fr = get_subgoal_frame(current_node); if (sg_fr) { TrStat_subgoals++; str[str_index] = 0; SHOW_TABLE_STRUCTURE("%s.\n", str); TrStat_ans_nodes++; if (SgFr_first_answer(sg_fr) == NULL) { if (SgFr_state(sg_fr) < complete) { TrStat_sg_incomplete++; SHOW_TABLE_STRUCTURE(" ---> INCOMPLETE\n"); } else { TrStat_answers_no++; SHOW_TABLE_STRUCTURE(" NO\n"); } } else if (SgFr_first_answer(sg_fr) == SgFr_answer_trie(sg_fr)) { TrStat_answers_true++; SHOW_TABLE_STRUCTURE(" TRUE\n"); } else { arity[0] = 0; traverse_answer_trie(TrNode_child(SgFr_answer_trie(sg_fr)), &str[str_index], 0, arity, 0, TRAVERSE_MODE_NORMAL, TRAVERSE_POSITION_FIRST PASS_REGS); if (SgFr_state(sg_fr) < complete) { TrStat_sg_incomplete++; SHOW_TABLE_STRUCTURE(" ---> INCOMPLETE\n"); } } } } else /* ... or continue with child node */ traverse_subgoal_trie(TrNode_child(current_node), str, str_index, arity, mode, TRAVERSE_POSITION_FIRST PASS_REGS); /* restore the initial state and continue with sibling nodes */ if (position == TRAVERSE_POSITION_FIRST) { str_index = current_str_index; mode = current_mode; current_node = TrNode_next(current_node); while (current_node) { memcpy(arity, current_arity, sizeof(int) * (current_arity[0] + 1)); #ifdef TRIE_COMPACT_PAIRS if (arity[arity[0]] == -2 && str[str_index - 1] != '[') str[str_index - 1] = ','; #else if (arity[arity[0]] == -1) str[str_index - 1] = '|'; #endif /* TRIE_COMPACT_PAIRS */ traverse_subgoal_trie(current_node, str, str_index, arity, mode, TRAVERSE_POSITION_NEXT PASS_REGS); current_node = TrNode_next(current_node); } free(current_arity); } return; } static void traverse_answer_trie(ans_node_ptr current_node, char *str, int str_index, int *arity, int var_index, int mode, int position USES_REGS) { int *current_arity = NULL, current_str_index = 0, current_var_index = 0, current_mode = 0; /* test if hashing */ if (IS_ANSWER_TRIE_HASH(current_node)) { ans_node_ptr *bucket, *last_bucket; ans_hash_ptr hash; hash = (ans_hash_ptr)current_node; bucket = Hash_buckets(hash); last_bucket = bucket + Hash_num_buckets(hash); current_arity = (int *)malloc(sizeof(int) * (arity[0] + 1)); memcpy(current_arity, arity, sizeof(int) * (arity[0] + 1)); do { if (*bucket) { traverse_answer_trie(*bucket, str, str_index, arity, var_index, mode, TRAVERSE_POSITION_FIRST PASS_REGS); memcpy(arity, current_arity, sizeof(int) * (current_arity[0] + 1)); #ifdef TRIE_COMPACT_PAIRS if (arity[arity[0]] == -2 && str[str_index - 1] != '[') str[str_index - 1] = ','; #else if (arity[arity[0]] == -1) str[str_index - 1] = '|'; #endif /* TRIE_COMPACT_PAIRS */ } } while (++bucket != last_bucket); free(current_arity); return; } /* save current state if first sibling node */ if (position == TRAVERSE_POSITION_FIRST) { current_arity = (int *)malloc(sizeof(int) * (arity[0] + 1)); memcpy(current_arity, arity, sizeof(int) * (arity[0] + 1)); current_str_index = str_index; current_var_index = var_index; current_mode = mode; } /* print VAR if starting a term */ if (arity[0] == 0 && mode == TRAVERSE_MODE_NORMAL) { str_index += sprintf(&str[str_index], " VAR%d: ", var_index); var_index++; } /* process current trie node */ TrStat_ans_nodes++; traverse_trie_node(TrNode_entry(current_node), str, &str_index, arity, &mode, TRAVERSE_TYPE_ANSWER PASS_REGS); /* show answer .... */ if (IS_ANSWER_LEAF_NODE(current_node)) { TrStat_answers++; str[str_index] = 0; SHOW_TABLE_STRUCTURE("%s\n", str); } #ifdef TABLING_INNER_CUTS /* ... or continue with pruned node */ else if (TrNode_child(current_node) == NULL) { TrStat_answers++; TrStat_answers_pruned++; } #endif /* TABLING_INNER_CUTS */ /* ... or continue with child node */ else traverse_answer_trie(TrNode_child(current_node), str, str_index, arity, var_index, mode, TRAVERSE_POSITION_FIRST PASS_REGS); /* restore the initial state and continue with sibling nodes */ if (position == TRAVERSE_POSITION_FIRST) { str_index = current_str_index; var_index = current_var_index; mode = current_mode; current_node = TrNode_next(current_node); while (current_node) { memcpy(arity, current_arity, sizeof(int) * (current_arity[0] + 1)); #ifdef TRIE_COMPACT_PAIRS if (arity[arity[0]] == -2 && str[str_index - 1] != '[') str[str_index - 1] = ','; #else if (arity[arity[0]] == -1) str[str_index - 1] = '|'; #endif /* TRIE_COMPACT_PAIRS */ traverse_answer_trie(current_node, str, str_index, arity, var_index, mode, TRAVERSE_POSITION_NEXT PASS_REGS); current_node = TrNode_next(current_node); } free(current_arity); } return; } static void traverse_global_trie(gt_node_ptr current_node, char *str, int str_index, int *arity, int mode, int position USES_REGS) { int *current_arity = NULL, current_str_index = 0, current_mode = 0; /* test if hashing */ if (IS_GLOBAL_TRIE_HASH(current_node)) { gt_node_ptr *bucket, *last_bucket; gt_hash_ptr hash; hash = (gt_hash_ptr)current_node; bucket = Hash_buckets(hash); last_bucket = bucket + Hash_num_buckets(hash); current_arity = (int *)malloc(sizeof(int) * (arity[0] + 1)); memcpy(current_arity, arity, sizeof(int) * (arity[0] + 1)); do { if (*bucket) { traverse_global_trie(*bucket, str, str_index, arity, mode, TRAVERSE_POSITION_FIRST PASS_REGS); memcpy(arity, current_arity, sizeof(int) * (current_arity[0] + 1)); #ifdef TRIE_COMPACT_PAIRS if (arity[arity[0]] == -2 && str[str_index - 1] != '[') str[str_index - 1] = ','; #else if (arity[arity[0]] == -1) str[str_index - 1] = '|'; #endif /* TRIE_COMPACT_PAIRS */ } } while (++bucket != last_bucket); free(current_arity); return; } /* save current state if first sibling node */ if (position == TRAVERSE_POSITION_FIRST) { current_arity = (int *)malloc(sizeof(int) * (arity[0] + 1)); memcpy(current_arity, arity, sizeof(int) * (arity[0] + 1)); current_str_index = str_index; current_mode = mode; } /* process current trie node */ TrStat_gt_nodes++; traverse_trie_node(TrNode_entry(current_node), str, &str_index, arity, &mode, TRAVERSE_TYPE_GT_SUBGOAL PASS_REGS); /* continue with child node ... */ if (arity[0] != 0 || mode != TRAVERSE_MODE_NORMAL) traverse_global_trie(TrNode_child(current_node), str, str_index, arity, mode, TRAVERSE_POSITION_FIRST PASS_REGS); /* ... or show term */ else { TrStat_gt_terms++; str[str_index] = 0; SHOW_TABLE_STRUCTURE(" TERMx" UInt_FORMAT ": %s\n", (CELL)TrNode_child(current_node), str); } /* restore the initial state and continue with sibling nodes */ if (position == TRAVERSE_POSITION_FIRST) { str_index = current_str_index; mode = current_mode; current_node = TrNode_next(current_node); while (current_node) { memcpy(arity, current_arity, sizeof(int) * (current_arity[0] + 1)); #ifdef TRIE_COMPACT_PAIRS if (arity[arity[0]] == -2 && str[str_index - 1] != '[') str[str_index - 1] = ','; #else if (arity[arity[0]] == -1) str[str_index - 1] = '|'; #endif /* TRIE_COMPACT_PAIRS */ traverse_global_trie(current_node, str, str_index, arity, mode, TRAVERSE_POSITION_NEXT PASS_REGS); current_node = TrNode_next(current_node); } free(current_arity); } return; } static void traverse_global_trie_for_term(gt_node_ptr current_node, char *str, int *str_index, int *arity, int *mode, int type USES_REGS) { if (TrNode_parent(current_node) != GLOBAL_root_gt) traverse_global_trie_for_term(TrNode_parent(current_node), str, str_index, arity, mode, type PASS_REGS); traverse_trie_node(TrNode_entry(current_node), str, str_index, arity, mode, type PASS_REGS); return; } static inline void traverse_trie_node(Term t, char *str, int *str_index_ptr, int *arity, int *mode_ptr, int type USES_REGS) { int mode = *mode_ptr; int str_index = *str_index_ptr; /* test the node type */ if (mode == TRAVERSE_MODE_DOUBLE) { #if SIZEOF_DOUBLE == 2 * SIZEOF_INT_P arity[0]++; arity[arity[0]] = (int)t; mode = TRAVERSE_MODE_DOUBLE2; } else if (mode == TRAVERSE_MODE_DOUBLE2) { union { Term t_dbl[sizeof(Float) / sizeof(Term)]; Float dbl; } u; u.dbl = 0.0; u.t_dbl[0] = t; u.t_dbl[1] = (Term)arity[arity[0]]; arity[0]--; #else /* SIZEOF_DOUBLE == SIZEOF_INT_P */ union { Term t_dbl[sizeof(Float) / sizeof(Term)]; Float dbl; } u; u.t_dbl[0] = t; #endif /* SIZEOF_DOUBLE x SIZEOF_INT_P */ str_index += sprintf(&str[str_index], "%.15g", u.dbl); traverse_update_arity(str, &str_index, arity); if (type == TRAVERSE_TYPE_SUBGOAL) mode = TRAVERSE_MODE_NORMAL; else /* TRAVERSE_TYPE_ANSWER || TRAVERSE_TYPE_GT_SUBGOAL || TRAVERSE_TYPE_GT_ANSWER */ mode = TRAVERSE_MODE_DOUBLE_END; } else if (mode == TRAVERSE_MODE_DOUBLE_END) { mode = TRAVERSE_MODE_NORMAL; } else if (mode == TRAVERSE_MODE_LONGINT) { Int li = (Int)t; str_index += sprintf(&str[str_index], Int_FORMAT, li); traverse_update_arity(str, &str_index, arity); if (type == TRAVERSE_TYPE_SUBGOAL) mode = TRAVERSE_MODE_NORMAL; else /* TRAVERSE_TYPE_ANSWER || TRAVERSE_TYPE_GT_SUBGOAL || TRAVERSE_TYPE_GT_ANSWER */ mode = TRAVERSE_MODE_LONGINT_END; } else if (mode == TRAVERSE_MODE_LONGINT_END) { mode = TRAVERSE_MODE_NORMAL; } else if (mode == TRAVERSE_MODE_BIGINT_OR_STRING) { str_index += Yap_OpaqueTermToString(AbsAppl((CELL *)t), str + str_index, 0); traverse_update_arity(str, &str_index, arity); if (type == TRAVERSE_TYPE_SUBGOAL) mode = TRAVERSE_MODE_NORMAL; else /* TRAVERSE_TYPE_ANSWER || TRAVERSE_TYPE_GT_SUBGOAL || TRAVERSE_TYPE_GT_ANSWER */ mode = TRAVERSE_MODE_BIGINT_OR_STRING_END; } else if (mode == TRAVERSE_MODE_BIGINT_OR_STRING_END) { mode = TRAVERSE_MODE_NORMAL; } else if (IsVarTerm(t)) { #ifdef TRIE_RATIONAL_TERMS if (t > VarIndexOfTableTerm(MAX_TABLE_VARS) && TrNode_child((gt_node_ptr)t) != (gt_node_ptr)1) { // TODO: substitute the != 1 test to something // more appropriate /* Rational term */ str_index += sprintf(&str[str_index], "**"); traverse_update_arity(str, &str_index, arity); } else #endif /* RATIONAL TERM SUPPORT FOR TRIES */ if (t > VarIndexOfTableTerm(MAX_TABLE_VARS)) { TrStat_gt_refs++; /* (type % 2 + 2): TRAVERSE_TYPE_ANSWER --> TRAVERSE_TYPE_GT_ANSWER */ /* (type % 2 + 2): TRAVERSE_TYPE_SUBGOAL --> TRAVERSE_TYPE_GT_SUBGOAL */ traverse_global_trie_for_term((gt_node_ptr)t, str, &str_index, arity, &mode, type % 2 + 2 PASS_REGS); } else { if (type == TRAVERSE_TYPE_SUBGOAL || type == TRAVERSE_TYPE_GT_SUBGOAL) str_index += sprintf(&str[str_index], "VAR%d", VarIndexOfTableTerm(t)); else /* TRAVERSE_TYPE_ANSWER || TRAVERSE_TYPE_GT_ANSWER */ str_index += sprintf(&str[str_index], "ANSVAR%d", VarIndexOfTableTerm(t)); traverse_update_arity(str, &str_index, arity); } } else if (IsIntTerm(t)) { str_index += sprintf(&str[str_index], Int_FORMAT, IntOfTerm(t)); traverse_update_arity(str, &str_index, arity); } else if (IsAtomTerm(t)) { #ifndef TRIE_COMPACT_PAIRS if (arity[arity[0]] == -1 && t == TermNil) { str[str_index - 1] = ']'; arity[0]--; } else #endif /* TRIE_COMPACT_PAIRS */ str_index += sprintf(&str[str_index], "%s", AtomName(AtomOfTerm(t))); traverse_update_arity(str, &str_index, arity); } else if (IsPairTerm(t)) { #ifdef TRIE_COMPACT_PAIRS if (t == CompactPairEndList) arity[arity[0]] = -1; else if (t == CompactPairEndTerm) { str[str_index - 1] = '|'; arity[arity[0]] = -1; #else if (arity[arity[0]] == -1) { str[str_index - 1] = ','; arity[arity[0]] = -2; #endif /* TRIE_COMPACT_PAIRS */ } else { str_index += sprintf(&str[str_index], "["); arity[0]++; arity[arity[0]] = -2; } } else if (IsApplTerm(t)) { Functor f = (Functor)RepAppl(t); if (f == FunctorDouble) { mode = TRAVERSE_MODE_DOUBLE; } else if (f == FunctorLongInt) { mode = TRAVERSE_MODE_LONGINT; } else if (f == FunctorBigInt || f == FunctorString) { mode = TRAVERSE_MODE_BIGINT_OR_STRING; } else if (f == FunctorComma) { if (arity[arity[0]] != -3) { str_index += sprintf(&str[str_index], "("); arity[0]++; } arity[arity[0]] = -4; } else { str_index += sprintf(&str[str_index], "%s(", AtomName(NameOfFunctor(f))); arity[0]++; arity[arity[0]] = ArityOfFunctor(f); } } *mode_ptr = mode; *str_index_ptr = str_index; return; } static inline void traverse_update_arity(char *str, int *str_index_ptr, int *arity) { int str_index = *str_index_ptr; while (arity[0]) { if (arity[arity[0]] > 0) { arity[arity[0]]--; if (arity[arity[0]] == 0) { str_index += sprintf(&str[str_index], ")"); arity[0]--; } else { str_index += sprintf(&str[str_index], ","); break; } } else { if (arity[arity[0]] == -4) { str_index += sprintf(&str[str_index], ","); arity[arity[0]] = -3; break; } else if (arity[arity[0]] == -3) { str_index += sprintf(&str[str_index], ")"); arity[0]--; } else if (arity[arity[0]] == -2) { #ifdef TRIE_COMPACT_PAIRS str_index += sprintf(&str[str_index], ","); #else str_index += sprintf(&str[str_index], "|"); arity[arity[0]] = -1; #endif /* TRIE_COMPACT_PAIRS */ break; } else if (arity[arity[0]] == -1) { str_index += sprintf(&str[str_index], "]"); arity[0]--; } } } *str_index_ptr = str_index; } /******************************* ** Global functions ** *******************************/ sg_fr_ptr subgoal_search(yamop *preg, CELL **Yaddr) { CACHE_REGS CELL *stack_vars; int i, subs_arity, pred_arity; tab_ent_ptr tab_ent; sg_fr_ptr sg_fr; sg_node_ptr current_sg_node; #ifdef MODE_DIRECTED_TABLING int *mode_directed, aux_mode_directed[MAX_TABLE_VARS]; int subs_pos = 0; #endif /* MODE_DIRECTED_TABLING */ stack_vars = *Yaddr; subs_arity = 0; pred_arity = preg->y_u.Otapl.s; tab_ent = preg->y_u.Otapl.te; current_sg_node = get_insert_subgoal_trie(tab_ent PASS_REGS); LOCK_SUBGOAL_TRIE(tab_ent); #ifdef MODE_DIRECTED_TABLING mode_directed = TabEnt_mode_directed(tab_ent); if (mode_directed) { int old_subs_arity = subs_arity; for (i = 1; i <= pred_arity; i++) { int j = MODE_DIRECTED_GET_ARG(mode_directed[i - 1]) + 1; current_sg_node = subgoal_search_loop(tab_ent, current_sg_node, Deref(XREGS[j]), &subs_arity, &stack_vars PASS_REGS); if (subs_arity != old_subs_arity) { if (subs_pos && MODE_DIRECTED_GET_MODE(aux_mode_directed[subs_pos - 1]) == MODE_DIRECTED_GET_MODE(mode_directed[i - 1])) { /* same mode as before -> use the current entry in the * aux_mode_directed[] array */ aux_mode_directed[subs_pos - 1] += MODE_DIRECTED_SET(subs_arity - old_subs_arity, 0); } else { /* new mode -> init a new entry in the aux_mode_directed[] array */ aux_mode_directed[subs_pos] = MODE_DIRECTED_SET(subs_arity - old_subs_arity, MODE_DIRECTED_GET_MODE(mode_directed[i - 1])); subs_pos++; } old_subs_arity = subs_arity; } } } else #endif /* MODE_DIRECTED_TABLING */ if (IsMode_GlobalTrie(TabEnt_mode(tab_ent))) { for (i = 1; i <= pred_arity; i++) current_sg_node = subgoal_search_terms_loop(tab_ent, current_sg_node, Deref(XREGS[i]), &subs_arity, &stack_vars PASS_REGS); } else { for (i = 1; i <= pred_arity; i++) current_sg_node = subgoal_search_loop(tab_ent, current_sg_node, Deref(XREGS[i]), &subs_arity, &stack_vars PASS_REGS); } STACK_PUSH_UP(subs_arity, stack_vars); *Yaddr = stack_vars++; /* reset variables */ while (subs_arity--) { Term t = STACK_POP_DOWN(stack_vars); RESET_VARIABLE(t); } sg_fr_ptr *sg_fr_end = get_insert_subgoal_frame_addr(current_sg_node PASS_REGS); #ifndef THREADS LOCK_SUBGOAL_NODE(current_sg_node); #endif /* !THREADS */ if (*sg_fr_end == NULL) { /* new tabled subgoal */ #ifdef MODE_DIRECTED_TABLING if (subs_pos) { ALLOC_BLOCK(mode_directed, subs_pos * sizeof(int), int); memcpy((void *)mode_directed, (void *)aux_mode_directed, subs_pos * sizeof(int)); } else mode_directed = NULL; #endif /* MODE_DIRECTED_TABLING */ #if !defined(THREADS_FULL_SHARING) && !defined(THREADS_CONSUMER_SHARING) new_subgoal_frame(sg_fr, preg, mode_directed); *sg_fr_end = sg_fr; __sync_synchronize(); TAG_AS_SUBGOAL_LEAF_NODE(current_sg_node); UNLOCK_SUBGOAL_NODE(current_sg_node); #else /* THREADS_FULL_SHARING || THREADS_CONSUMER_SHARING */ sg_ent_ptr sg_ent = (sg_ent_ptr)UNTAG_SUBGOAL_NODE(TrNode_sg_ent(current_sg_node)); new_subgoal_frame(sg_fr, sg_ent); #ifdef THREADS_CONSUMER_SHARING SgFr_state(sg_fr) = ready_external; #else SgFr_state(sg_fr) = ready; #endif /* THREADS_CONSUMER_SHARING */ if (SgEnt_sg_ent_state(sg_ent) == ready) { LOCK(SgEnt_lock(sg_ent)); if (SgEnt_sg_ent_state(sg_ent) == ready) { SgEnt_code(sg_ent) = preg; SgEnt_init_mode_directed_fields(sg_ent, mode_directed); SgEnt_sg_ent_state(sg_ent) = evaluating; #ifdef THREADS_CONSUMER_SHARING SgEnt_gen_worker(sg_ent) = worker_id; SgFr_state(sg_fr) = ready; #endif /* THREADS_CONSUMER_SHARING */ } UNLOCK(SgEnt_lock(sg_ent)); } *sg_fr_end = sg_fr; #endif /* !THREADS_FULL_SHARING && !THREADS_CONSUMER_SHARING */ } else { /* repeated tabled subgoal */ #ifndef THREADS UNLOCK_SUBGOAL_NODE(current_sg_node); #endif /* !THREADS */ sg_fr = (sg_fr_ptr)UNTAG_SUBGOAL_NODE(*sg_fr_end); #ifdef LIMIT_TABLING if (SgFr_state(sg_fr) <= ready) { /* incomplete or ready */ remove_from_global_sg_fr_list(sg_fr); } #endif /* LIMIT_TABLING */ } UNLOCK_SUBGOAL_TRIE(tab_ent); return sg_fr; } ans_node_ptr answer_search(sg_fr_ptr sg_fr, CELL *subs_ptr) { #define subs_arity *subs_ptr CACHE_REGS CELL *stack_vars; int i, vars_arity; ans_node_ptr current_ans_node; vars_arity = 0; current_ans_node = SgFr_answer_trie(sg_fr); if (IsMode_GlobalTrie(TabEnt_mode(SgFr_tab_ent(sg_fr)))) { for (i = subs_arity; i >= 1; i--) { TABLING_ERROR_CHECKING(answer_search, IsNonVarTerm(subs_ptr[i])); current_ans_node = answer_search_terms_loop( sg_fr, current_ans_node, Deref(subs_ptr[i]), &vars_arity PASS_REGS); } } else { for (i = subs_arity; i >= 1; i--) { TABLING_ERROR_CHECKING(answer_search, IsNonVarTerm(subs_ptr[i])); current_ans_node = answer_search_loop( sg_fr, current_ans_node, Deref(subs_ptr[i]), &vars_arity PASS_REGS); } } /* reset variables */ stack_vars = (CELL *)TR; while (vars_arity--) { Term t = STACK_POP_DOWN(stack_vars); RESET_VARIABLE(t); } return current_ans_node; #undef subs_arity } #ifdef MODE_DIRECTED_TABLING ans_node_ptr mode_directed_answer_search(sg_fr_ptr sg_fr, CELL *subs_ptr) { #define subs_arity *subs_ptr CACHE_REGS CELL *stack_vars; int i, j, vars_arity; ans_node_ptr current_ans_node, invalid_ans_node; int *mode_directed; vars_arity = 0; current_ans_node = SgFr_answer_trie(sg_fr); invalid_ans_node = NULL; mode_directed = SgFr_mode_directed(sg_fr); j = 0; i = subs_arity; while (i) { int mode = MODE_DIRECTED_GET_MODE(mode_directed[j]); int n_subs = MODE_DIRECTED_GET_ARG(mode_directed[j]); do { TABLING_ERROR_CHECKING(answer_search, IsNonVarTerm(subs_ptr[i])); if (mode == MODE_DIRECTED_INDEX || mode == MODE_DIRECTED_ALL) { current_ans_node = answer_search_loop( sg_fr, current_ans_node, Deref(subs_ptr[i]), &vars_arity PASS_REGS); } else { LOCK_ANSWER_NODE(current_ans_node); if (TrNode_child(current_ans_node) == NULL) { #if defined(THREADS_FULL_SHARING) || defined(THREADS_CONSUMER_SHARING) struct answer_trie_node virtual_ans_node; /* necessary because the answer_search_loop() procedure also locks the parent node */ ans_node_ptr parent_ans_node = current_ans_node; AnsNode_init_lock_field(&virtual_ans_node); TrNode_parent(&virtual_ans_node) = NULL; TrNode_child(&virtual_ans_node) = NULL; current_ans_node = answer_search_loop(sg_fr, &virtual_ans_node, Deref(subs_ptr[i]), &vars_arity PASS_REGS); TrNode_child(parent_ans_node) = TrNode_child(&virtual_ans_node); TrNode_parent(TrNode_child(&virtual_ans_node)) = parent_ans_node; #else current_ans_node = answer_search_loop(sg_fr, current_ans_node, Deref(subs_ptr[i]), &vars_arity PASS_REGS); #endif /* THREADS_FULL_SHARING || THREADS_CONSUMER_SHARING */ } else if (mode == MODE_DIRECTED_MIN || mode == MODE_DIRECTED_MAX) { ans_node_ptr parent_ans_node = current_ans_node; invalid_ans_node = TrNode_child( parent_ans_node); /* by default, assume a better answer */ current_ans_node = answer_search_min_max( sg_fr, current_ans_node, Deref(subs_ptr[i]), mode PASS_REGS); if (invalid_ans_node == TrNode_child(parent_ans_node)) /* worse or equal answer */ invalid_ans_node = NULL; } else if (mode == MODE_DIRECTED_SUM) { invalid_ans_node = TrNode_child(current_ans_node); current_ans_node = answer_search_sum(sg_fr, current_ans_node, Deref(subs_ptr[i]) PASS_REGS); } else if (mode == MODE_DIRECTED_LAST) { #if defined(THREADS_FULL_SHARING) || defined(THREADS_CONSUMER_SHARING) struct answer_trie_node virtual_ans_node; /* necessary because the answer_search_loop() procedure also locks the parent node */ ans_node_ptr parent_ans_node = current_ans_node; invalid_ans_node = TrNode_child(parent_ans_node); AnsNode_init_lock_field(&virtual_ans_node); TrNode_parent(&virtual_ans_node) = NULL; TrNode_child(&virtual_ans_node) = NULL; current_ans_node = answer_search_loop(sg_fr, &virtual_ans_node, Deref(subs_ptr[i]), &vars_arity PASS_REGS); TrNode_child(parent_ans_node) = TrNode_child(&virtual_ans_node); TrNode_parent(TrNode_child(&virtual_ans_node)) = parent_ans_node; #else invalid_ans_node = TrNode_child(current_ans_node); TrNode_child(current_ans_node) = NULL; current_ans_node = answer_search_loop(sg_fr, current_ans_node, Deref(subs_ptr[i]), &vars_arity PASS_REGS); #endif /* THREADS_FULL_SHARING || THREADS_CONSUMER_SHARING */ } else if (mode == MODE_DIRECTED_FIRST) { current_ans_node = NULL; } else Yap_Error(SYSTEM_ERROR_INTERNAL, TermNil, "mode_directed_answer_search: unknown mode"); UNLOCK_ANSWER_NODE(current_ans_node); } n_subs--; i--; } while (n_subs && current_ans_node); if (current_ans_node == NULL) /* no answer inserted */ break; j++; } if (invalid_ans_node) invalidate_answer_trie(invalid_ans_node, sg_fr, TRAVERSE_POSITION_FIRST PASS_REGS); /* reset variables */ stack_vars = (CELL *)TR; while (vars_arity--) { Term t = STACK_POP_DOWN(stack_vars); RESET_VARIABLE(t); } return current_ans_node; #undef subs_arity } #endif /* MODE_DIRECTED_TABLING */ void load_answer(ans_node_ptr current_ans_node, CELL *subs_ptr) { CACHE_REGS #define subs_arity *subs_ptr CELL *stack_terms; int i; TABLING_ERROR_CHECKING(load_answer, H < H_FZ); if (subs_arity == 0) return; stack_terms = load_answer_loop(current_ans_node PASS_REGS); for (i = subs_arity; i >= 1; i--) { Term t = STACK_POP_DOWN(stack_terms); YapBind((CELL *)subs_ptr[i], t); } TABLING_ERROR_CHECKING(load_answer, stack_terms != (CELL *)LOCAL_TrailTop); return; #undef subs_arity } CELL *exec_substitution(gt_node_ptr current_node, CELL *aux_stack) { CACHE_REGS #define subs_arity *subs_ptr CELL *stack_terms, *subs_ptr; Term t; ++aux_stack; /* skip the heap_arity entry */ stack_terms = exec_substitution_loop(current_node, &aux_stack, (CELL *)LOCAL_TrailTop PASS_REGS); *--aux_stack = 0; /* restore the heap_arity entry */ subs_ptr = aux_stack + aux_stack[1] + 2; t = STACK_POP_DOWN(stack_terms); YapBind((CELL *)subs_ptr[subs_arity], t); TABLING_ERROR_CHECKING(exec_substitution, stack_terms != (CELL *)LOCAL_TrailTop); *subs_ptr = subs_arity - 1; return aux_stack; #undef subs_arity } void update_answer_trie(sg_fr_ptr sg_fr) { ans_node_ptr current_node; free_answer_hash_chain(SgFr_hash_chain(sg_fr)); SgFr_hash_chain(sg_fr) = NULL; SgFr_state(sg_fr) += 2; /* complete --> compiled : complete_in_use --> compiled_in_use */ #if defined(THREADS_FULL_SHARING) || defined(THREADS_CONSUMER_SHARING) SgFr_sg_ent_state(sg_fr) += 2; /* complete --> compiled */ #ifdef THREADS_FULL_SHARING if (IsMode_Batched(TabEnt_mode(SgFr_tab_ent(sg_fr)))) { /* cleaning bits used by batched mode and shifting the instruction back to * the original place */ ans_node_ptr leaf_ans_trie_node = SgFr_first_answer(sg_fr); while (TrNode_child(leaf_ans_trie_node) != NULL) { ANSWER_LEAF_NODE_INSTR_ABSOLUTE(leaf_ans_trie_node); leaf_ans_trie_node = TrNode_child(leaf_ans_trie_node); } ANSWER_LEAF_NODE_INSTR_ABSOLUTE(leaf_ans_trie_node); } #endif /* THREADS_FULL_SHARING */ #endif /* THREADS_FULL_SHARING || THREADS_CONSUMER_SHARING */ current_node = TrNode_child(SgFr_answer_trie(sg_fr)); if (current_node) { #ifdef YAPOR TrNode_instr(current_node) -= 1; #ifdef TABLING_INNER_CUTS update_answer_trie_branch(NULL, current_node); #else update_answer_trie_branch(current_node); #endif /* TABLING_INNER_CUTS */ #else /* TABLING */ update_answer_trie_branch(current_node, TRAVERSE_POSITION_FIRST); #endif /* YAPOR */ } return; } void free_subgoal_trie(sg_node_ptr current_node, int mode, int position) { CACHE_REGS if (IS_SUBGOAL_TRIE_HASH(current_node)) { sg_node_ptr *bucket, *last_bucket; sg_hash_ptr hash; hash = (sg_hash_ptr)current_node; bucket = Hash_buckets(hash); last_bucket = bucket + Hash_num_buckets(hash); do { if (*bucket) { sg_node_ptr next_node = *bucket; do { current_node = next_node; next_node = TrNode_next(current_node); free_subgoal_trie(current_node, mode, TRAVERSE_POSITION_NEXT); } while (next_node); } } while (++bucket != last_bucket); IF_ABOLISH_SUBGOAL_TRIE_SHARED_DATA_STRUCTURES { FREE_BUCKETS(Hash_buckets(hash)); FREE_SUBGOAL_TRIE_HASH(hash); } return; } if (!IS_SUBGOAL_LEAF_NODE(current_node)) { int child_mode; if (mode == TRAVERSE_MODE_NORMAL) { Term t = TrNode_entry(current_node); if (IsApplTerm(t)) { Functor f = (Functor)RepAppl(t); if (f == FunctorDouble) child_mode = TRAVERSE_MODE_DOUBLE; else if (f == FunctorLongInt) child_mode = TRAVERSE_MODE_LONGINT; else if (f == FunctorBigInt || f == FunctorString) child_mode = TRAVERSE_MODE_BIGINT_OR_STRING; else child_mode = TRAVERSE_MODE_NORMAL; } else child_mode = TRAVERSE_MODE_NORMAL; } else if (mode == TRAVERSE_MODE_LONGINT) { child_mode = TRAVERSE_MODE_LONGINT_END; } else if (mode == TRAVERSE_MODE_BIGINT_OR_STRING) { Yap_FreeCodeSpace((char *)TrNode_entry(current_node)); child_mode = TRAVERSE_MODE_BIGINT_OR_STRING_END; } else if (mode == TRAVERSE_MODE_DOUBLE) { #if SIZEOF_DOUBLE == 2 * SIZEOF_INT_P child_mode = TRAVERSE_MODE_DOUBLE2; } else if (mode == TRAVERSE_MODE_DOUBLE2) { #endif /* SIZEOF_DOUBLE x SIZEOF_INT_P */ child_mode = TRAVERSE_MODE_DOUBLE_END; } else { child_mode = TRAVERSE_MODE_NORMAL; } free_subgoal_trie(TrNode_child(current_node), child_mode, TRAVERSE_POSITION_FIRST); } else { sg_fr_ptr sg_fr = get_subgoal_frame_for_abolish(current_node PASS_REGS); if (sg_fr) { ans_node_ptr ans_node; free_answer_hash_chain(SgFr_hash_chain(sg_fr)); ans_node = SgFr_answer_trie(sg_fr); if (TrNode_child(ans_node)) free_answer_trie(TrNode_child(ans_node), TRAVERSE_MODE_NORMAL, TRAVERSE_POSITION_FIRST); IF_ABOLISH_ANSWER_TRIE_SHARED_DATA_STRUCTURES { FREE_ANSWER_TRIE_NODE(ans_node); #if defined(THREADS_FULL_SHARING) || defined(THREADS_CONSUMER_SHARING) #ifdef MODE_DIRECTED_TABLING if (SgEnt_mode_directed(SgFr_sg_ent(sg_fr))) FREE_BLOCK(SgEnt_mode_directed(SgFr_sg_ent(sg_fr))); if (SgFr_invalid_chain(sg_fr)) { ans_node_ptr current_node, next_node; /* free invalid answer nodes */ current_node = SgFr_invalid_chain(sg_fr); SgFr_invalid_chain(sg_fr) = NULL; while (current_node) { next_node = TrNode_next(current_node); FREE_ANSWER_TRIE_NODE(current_node); current_node = next_node; } } #endif /* MODE_DIRECTED_TABLING */ FREE_SUBGOAL_ENTRY(SgFr_sg_ent(sg_fr)); #endif /* THREADS_FULL_SHARING || THREADS_CONSUMER_SHARING */ } #ifdef LIMIT_TABLING remove_from_global_sg_fr_list(sg_fr); #endif /* LIMIT_TABLING */ #if defined(MODE_DIRECTED_TABLING) && !defined(THREADS_FULL_SHARING) && \ !defined(THREADS_CONSUMER_SHARING) if (SgFr_mode_directed(sg_fr)) FREE_BLOCK(SgFr_mode_directed(sg_fr)); #endif /* MODE_DIRECTED_TABLING && !THREADS_FULL_SHARING && \ !THREADS_CONSUMER_SHARING */ FREE_SUBGOAL_FRAME(sg_fr); } } if (position == TRAVERSE_POSITION_FIRST) { sg_node_ptr next_node = TrNode_next(current_node); IF_ABOLISH_SUBGOAL_TRIE_SHARED_DATA_STRUCTURES { CHECK_DECREMENT_GLOBAL_TRIE_REFERENCE(TrNode_entry(current_node), mode); FREE_SUBGOAL_TRIE_NODE(current_node); } while (next_node) { current_node = next_node; next_node = TrNode_next(current_node); free_subgoal_trie(current_node, mode, TRAVERSE_POSITION_NEXT); } } else { IF_ABOLISH_SUBGOAL_TRIE_SHARED_DATA_STRUCTURES { CHECK_DECREMENT_GLOBAL_TRIE_REFERENCE(TrNode_entry(current_node), mode); FREE_SUBGOAL_TRIE_NODE(current_node); } } return; } void free_answer_trie(ans_node_ptr current_node, int mode, int position) { CACHE_REGS #ifdef TABLING_INNER_CUTS if (!IS_ANSWER_LEAF_NODE(current_node) && TrNode_child(current_node)) { #else if (!IS_ANSWER_LEAF_NODE(current_node)) { #endif /* TABLING_INNER_CUTS */ int child_mode; if (mode == TRAVERSE_MODE_NORMAL) { Term t = TrNode_entry(current_node); if (IsApplTerm(t)) { Functor f = (Functor)RepAppl(t); if (f == FunctorDouble) child_mode = TRAVERSE_MODE_DOUBLE; else if (f == FunctorLongInt) child_mode = TRAVERSE_MODE_LONGINT; else if (f == FunctorBigInt || f == FunctorString) child_mode = TRAVERSE_MODE_BIGINT_OR_STRING; else child_mode = TRAVERSE_MODE_NORMAL; } else child_mode = TRAVERSE_MODE_NORMAL; } else if (mode == TRAVERSE_MODE_LONGINT) { child_mode = TRAVERSE_MODE_LONGINT_END; } else if (mode == TRAVERSE_MODE_BIGINT_OR_STRING) { Yap_FreeCodeSpace((char *)TrNode_entry(current_node)); child_mode = TRAVERSE_MODE_BIGINT_OR_STRING_END; } else if (mode == TRAVERSE_MODE_DOUBLE) { #if SIZEOF_DOUBLE == 2 * SIZEOF_INT_P child_mode = TRAVERSE_MODE_DOUBLE2; } else if (mode == TRAVERSE_MODE_DOUBLE2) { #endif /* SIZEOF_DOUBLE x SIZEOF_INT_P */ child_mode = TRAVERSE_MODE_DOUBLE_END; } else { child_mode = TRAVERSE_MODE_NORMAL; } free_answer_trie(TrNode_child(current_node), child_mode, TRAVERSE_POSITION_FIRST); } if (position == TRAVERSE_POSITION_FIRST) { ans_node_ptr next_node = TrNode_next(current_node); IF_ABOLISH_ANSWER_TRIE_SHARED_DATA_STRUCTURES { CHECK_DECREMENT_GLOBAL_TRIE_REFERENCE(TrNode_entry(current_node), mode); FREE_ANSWER_TRIE_NODE(current_node); } while (next_node) { current_node = next_node; next_node = TrNode_next(current_node); free_answer_trie(current_node, mode, TRAVERSE_POSITION_NEXT); } } else { IF_ABOLISH_ANSWER_TRIE_SHARED_DATA_STRUCTURES { CHECK_DECREMENT_GLOBAL_TRIE_REFERENCE(TrNode_entry(current_node), mode); FREE_ANSWER_TRIE_NODE(current_node); } } return; } void free_answer_hash_chain(ans_hash_ptr hash) { #if defined(THREADS_NO_SHARING) || defined(THREADS_SUBGOAL_SHARING) CACHE_REGS #endif /* THREADS_NO_SHARING || THREADS_SUBGOAL_SHARING */ while (hash) { ans_node_ptr chain_node, *bucket, *last_bucket; ans_hash_ptr next_hash; bucket = Hash_buckets(hash); last_bucket = bucket + Hash_num_buckets(hash); while (!*bucket) bucket++; chain_node = *bucket; TrNode_child((ans_node_ptr)UNTAG_ANSWER_NODE(TrNode_parent(chain_node))) = chain_node; while (++bucket != last_bucket) { if (*bucket) { while (TrNode_next(chain_node)) chain_node = TrNode_next(chain_node); TrNode_next(chain_node) = *bucket; chain_node = *bucket; } } next_hash = Hash_next(hash); FREE_BUCKETS(Hash_buckets(hash)); FREE_ANSWER_TRIE_HASH(hash); hash = next_hash; } return; } /***************************************************************************************** ** all threads abolish their local data structures, and the main thread also *abolishes ** ** all shared data structures, if no other thread is running (GLOBAL_NOfThreads *== 1). ** *****************************************************************************************/ void abolish_table(tab_ent_ptr tab_ent) { CACHE_REGS sg_node_ptr sg_node; #ifdef THREADS if (GLOBAL_NOfThreads == 1) { ATTACH_PAGES(_pages_tab_ent); #if defined(THREADS_FULL_SHARING) || defined(THREADS_CONSUMER_SHARING) ATTACH_PAGES(_pages_sg_ent); #endif /* THREADS_FULL_SHARING || THREADS_CONSUMER_SHARING */ ATTACH_PAGES(_pages_sg_fr); ATTACH_PAGES(_pages_dep_fr); ATTACH_PAGES(_pages_sg_node); ATTACH_PAGES(_pages_sg_hash); ATTACH_PAGES(_pages_ans_node); ATTACH_PAGES(_pages_ans_hash); #if defined(THREADS_FULL_SHARING) ATTACH_PAGES(_pages_ans_ref_node); #endif /* THREADS_FULL_SHARING */ ATTACH_PAGES(_pages_gt_node); ATTACH_PAGES(_pages_gt_hash); } #endif /* THREADS */ sg_node = get_subgoal_trie_for_abolish(tab_ent PASS_REGS); if (sg_node) { if (TrNode_child(sg_node)) { if (TabEnt_arity(tab_ent)) { free_subgoal_trie(TrNode_child(sg_node), TRAVERSE_MODE_NORMAL, TRAVERSE_POSITION_FIRST); } else { sg_fr_ptr sg_fr = get_subgoal_frame_for_abolish(sg_node PASS_REGS); if (sg_fr) { IF_ABOLISH_ANSWER_TRIE_SHARED_DATA_STRUCTURES { FREE_ANSWER_TRIE_NODE(SgFr_answer_trie(sg_fr)); #if defined(THREADS_FULL_SHARING) || defined(THREADS_CONSUMER_SHARING) FREE_SUBGOAL_ENTRY(SgFr_sg_ent(sg_fr)); #endif /* THREADS_FULL_SHARING || THREADS_CONSUMER_SHARING */ } #ifdef LIMIT_TABLING remove_from_global_sg_fr_list(sg_fr); #endif /* LIMIT_TABLING */ FREE_SUBGOAL_FRAME(sg_fr); } } IF_ABOLISH_SUBGOAL_TRIE_SHARED_DATA_STRUCTURES TrNode_child(sg_node) = NULL; } #ifdef THREADS_NO_SHARING FREE_SUBGOAL_TRIE_NODE(sg_node); #endif /* THREADS_NO_SHARING */ } return; } void showTable(tab_ent_ptr tab_ent, int show_mode, FILE *out) { CACHE_REGS sg_node_ptr sg_node; TrStat_out = out; TrStat_show = show_mode; TrStat_subgoals = 0; TrStat_sg_incomplete = 0; TrStat_sg_nodes = 1; TrStat_answers = 0; TrStat_answers_true = 0; TrStat_answers_no = 0; #ifdef TABLING_INNER_CUTS TrStat_answers_pruned = 0; #endif /* TABLING_INNER_CUTS */ TrStat_ans_nodes = 0; TrStat_gt_refs = 0; if (show_mode == SHOW_MODE_STATISTICS) fprintf(TrStat_out, "Table statistics for predicate '%s", AtomName(TabEnt_atom(tab_ent))); else /* SHOW_MODE_STRUCTURE */ fprintf(TrStat_out, "Table structure for predicate '%s", AtomName(TabEnt_atom(tab_ent))); #ifdef MODE_DIRECTED_TABLING if (TabEnt_mode_directed(tab_ent)) { int i, *mode_directed = TabEnt_mode_directed(tab_ent); fprintf(TrStat_out, "("); for (i = 0; i < TabEnt_arity(tab_ent); i++) { int mode = MODE_DIRECTED_GET_MODE(mode_directed[i]); if (mode == MODE_DIRECTED_INDEX) { fprintf(TrStat_out, "index"); } else if (mode == MODE_DIRECTED_MIN) { fprintf(TrStat_out, "min"); } else if (mode == MODE_DIRECTED_MAX) { fprintf(TrStat_out, "max"); } else if (mode == MODE_DIRECTED_ALL) { fprintf(TrStat_out, "all"); } else if (mode == MODE_DIRECTED_SUM) { fprintf(TrStat_out, "sum"); } else if (mode == MODE_DIRECTED_LAST) { fprintf(TrStat_out, "last"); } else if (mode == MODE_DIRECTED_FIRST) { fprintf(TrStat_out, "first"); } else Yap_Error(SYSTEM_ERROR_INTERNAL, TermNil, "show_table: unknown mode"); if (i != MODE_DIRECTED_GET_ARG(mode_directed[i])) fprintf(TrStat_out, "(ARG%d)", MODE_DIRECTED_GET_ARG(mode_directed[i]) + 1); if (i + 1 != TabEnt_arity(tab_ent)) fprintf(TrStat_out, ","); } fprintf(TrStat_out, ")'\n"); } else #endif /* MODE_DIRECTED_TABLING */ fprintf(TrStat_out, "/%d'\n", TabEnt_arity(tab_ent)); sg_node = get_subgoal_trie(tab_ent); if (sg_node) { if (TrNode_child(sg_node)) { if (TabEnt_arity(tab_ent)) { char *str = (char *)malloc(sizeof(char) * SHOW_TABLE_STR_ARRAY_SIZE); int *arity = (int *)malloc(sizeof(int) * SHOW_TABLE_ARITY_ARRAY_SIZE); arity[0] = 1; arity[1] = TabEnt_arity(tab_ent); int str_index = sprintf(str, " ?- %s(", AtomName(TabEnt_atom(tab_ent))); traverse_subgoal_trie(TrNode_child(sg_node), str, str_index, arity, TRAVERSE_MODE_NORMAL, TRAVERSE_POSITION_FIRST PASS_REGS); free(str); free(arity); } else { sg_fr_ptr sg_fr = get_subgoal_frame(sg_node); if (sg_fr) { TrStat_subgoals++; SHOW_TABLE_STRUCTURE(" ?- %s.\n", AtomName(TabEnt_atom(tab_ent))); TrStat_ans_nodes++; if (SgFr_first_answer(sg_fr) == NULL) { if (SgFr_state(sg_fr) < complete) { TrStat_sg_incomplete++; SHOW_TABLE_STRUCTURE(" ---> INCOMPLETE\n"); } else { TrStat_answers_no++; SHOW_TABLE_STRUCTURE(" NO\n"); } } else { /* SgFr_first_answer(sg_fr) == SgFr_answer_trie(sg_fr) */ TrStat_answers_true++; SHOW_TABLE_STRUCTURE(" TRUE\n"); } } } } } if (TrStat_subgoals == 0) SHOW_TABLE_STRUCTURE(" EMPTY\n"); if (show_mode == SHOW_MODE_STATISTICS) { fprintf(TrStat_out, " Subgoal trie structure\n"); fprintf(TrStat_out, " Subgoals: %ld (%ld incomplete)\n", TrStat_subgoals, TrStat_sg_incomplete); fprintf(TrStat_out, " Subgoal trie nodes: %ld\n", TrStat_sg_nodes); fprintf(TrStat_out, " Answer trie structure(s)\n"); #ifdef TABLING_INNER_CUTS fprintf(TrStat_out, " Answers: %ld (%ld pruned)\n", TrStat_answers, TrStat_answers_pruned); #else fprintf(TrStat_out, " Answers: %ld\n", TrStat_answers); #endif /* TABLING_INNER_CUTS */ fprintf(TrStat_out, " Answers 'TRUE': %ld\n", TrStat_answers_true); fprintf(TrStat_out, " Answers 'NO': %ld\n", TrStat_answers_no); fprintf(TrStat_out, " Answer trie nodes: %ld\n", TrStat_ans_nodes); fprintf(TrStat_out, " Global trie references: %ld\n", TrStat_gt_refs); } return; } void showGlobalTrie(int show_mode, FILE *out) { CACHE_REGS TrStat_out = out; TrStat_show = show_mode; TrStat_gt_terms = 0; TrStat_gt_nodes = 1; TrStat_gt_refs = 0; if (show_mode == SHOW_MODE_STATISTICS) fprintf(TrStat_out, "Global trie statistics\n"); else /* SHOW_MODE_STRUCTURE */ fprintf(TrStat_out, "Global trie structure\n"); if (TrNode_child(GLOBAL_root_gt)) { char *str = (char *)malloc(sizeof(char) * SHOW_TABLE_STR_ARRAY_SIZE); int *arity = (int *)malloc(sizeof(int) * SHOW_TABLE_ARITY_ARRAY_SIZE); arity[0] = 0; traverse_global_trie(TrNode_child(GLOBAL_root_gt), str, 0, arity, TRAVERSE_MODE_NORMAL, TRAVERSE_POSITION_FIRST PASS_REGS); free(str); free(arity); } else SHOW_TABLE_STRUCTURE(" EMPTY\n"); if (show_mode == SHOW_MODE_STATISTICS) { fprintf(TrStat_out, " Terms: %ld\n", TrStat_gt_terms); fprintf(TrStat_out, " Global trie nodes: %ld\n", TrStat_gt_nodes); fprintf(TrStat_out, " Global trie auto references: %ld\n", TrStat_gt_refs); } return; } #endif /* TABLING */