1069 lines
44 KiB
C
1069 lines
44 KiB
C
/************************************************************************
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** **
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** The YapTab/YapOr/OPTYap systems **
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** **
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** YapTab extends the Yap Prolog engine to support sequential tabling **
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** YapOr extends the Yap Prolog engine to support or-parallelism **
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** OPTYap extends the Yap Prolog engine to support or-parallel tabling **
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** **
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** **
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** Yap Prolog was developed at University of Porto, Portugal **
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** **
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************************************************************************/
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/************************************
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** Includes & Prototypes **
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************************************/
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#include <stdlib.h>
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#if HAVE_STRING_H
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#include <string.h>
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#endif /* HAVE_STRING_H */
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#include "opt.mavar.h"
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static inline Int freeze_current_cp(void);
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static inline void wake_frozen_cp(Int);
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static inline void abolish_frozen_cps_until(Int);
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static inline void abolish_frozen_cps_all(void);
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static inline void adjust_freeze_registers(void);
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static inline void mark_as_completed(sg_fr_ptr);
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static inline void unbind_variables(tr_fr_ptr, tr_fr_ptr);
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static inline void rebind_variables(tr_fr_ptr, tr_fr_ptr);
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static inline void restore_bindings(tr_fr_ptr, tr_fr_ptr);
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static inline CELL *expand_auxiliary_stack(CELL *);
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static inline void abolish_incomplete_subgoals(choiceptr);
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#ifdef YAPOR
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static inline void pruning_over_tabling_data_structures(void);
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static inline void collect_suspension_frames(or_fr_ptr);
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#ifdef TIMESTAMP_CHECK
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static inline susp_fr_ptr suspension_frame_to_resume(or_fr_ptr, long);
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#else
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static inline susp_fr_ptr suspension_frame_to_resume(or_fr_ptr);
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#endif /* TIMESTAMP_CHECK */
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#endif /* YAPOR */
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#ifdef TABLING_INNER_CUTS
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static inline void CUT_store_tg_answer(or_fr_ptr, ans_node_ptr, choiceptr, int);
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static inline tg_sol_fr_ptr CUT_store_tg_answers(or_fr_ptr, tg_sol_fr_ptr, int);
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static inline void CUT_validate_tg_answers(tg_sol_fr_ptr);
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static inline void CUT_join_tg_solutions(tg_sol_fr_ptr *, tg_sol_fr_ptr);
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static inline void CUT_join_solution_frame_tg_answers(tg_sol_fr_ptr);
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static inline void CUT_join_solution_frames_tg_answers(tg_sol_fr_ptr);
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static inline void CUT_free_tg_solution_frame(tg_sol_fr_ptr);
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static inline void CUT_free_tg_solution_frames(tg_sol_fr_ptr);
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static inline tg_sol_fr_ptr CUT_prune_tg_solution_frames(tg_sol_fr_ptr, int);
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#endif /* TABLING_INNER_CUTS */
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/*********************************
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** Tabling mode flags **
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*********************************/
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#define Flag_Batched 0x001
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#define Flag_Local 0x002
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#define Flags_SchedulingMode (Flag_Batched | Flag_Local)
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#define Flag_ExecAnswers 0x010
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#define Flag_LoadAnswers 0x020
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#define Flags_AnswersMode (Flag_ExecAnswers | Flag_LoadAnswers)
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#define Flag_LocalTrie 0x100
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#define Flag_GlobalTrie 0x200
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#define Flags_TrieMode (Flag_LocalTrie | Flag_GlobalTrie)
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#define SetMode_Batched(X) (X) = ((X) & ~Flags_SchedulingMode) | Flag_Batched
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#define SetMode_Local(X) (X) = ((X) & ~Flags_SchedulingMode) | Flag_Local
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#define SetMode_ExecAnswers(X) (X) = ((X) & ~Flags_AnswersMode) | Flag_ExecAnswers
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#define SetMode_LoadAnswers(X) (X) = ((X) & ~Flags_AnswersMode) | Flag_LoadAnswers
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#define SetMode_LocalTrie(X) (X) = ((X) & ~Flags_TrieMode) | Flag_LocalTrie
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#define SetMode_GlobalTrie(X) (X) = ((X) & ~Flags_TrieMode) | Flag_GlobalTrie
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#define IsMode_Batched(X) ((X) & Flag_Batched)
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#define IsMode_Local(X) ((X) & Flag_Local)
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#define IsMode_ExecAnswers(X) ((X) & Flag_ExecAnswers)
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#define IsMode_LoadAnswers(X) ((X) & Flag_LoadAnswers)
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#define IsMode_LocalTrie(X) ((X) & Flag_LocalTrie)
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#define IsMode_GlobalTrie(X) ((X) & Flag_GlobalTrie)
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/******************************
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** Tabling defines **
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******************************/
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#define SHOW_MODE_STRUCTURE 0
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#define SHOW_MODE_STATISTICS 1
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#define TRAVERSE_MODE_NORMAL 0
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#define TRAVERSE_MODE_DOUBLE 1
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#define TRAVERSE_MODE_DOUBLE2 2
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#define TRAVERSE_MODE_DOUBLE_END 3
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#define TRAVERSE_MODE_LONGINT 4
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#define TRAVERSE_MODE_LONGINT_END 5
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/* do not change order !!! */
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#define TRAVERSE_TYPE_SUBGOAL 0
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#define TRAVERSE_TYPE_ANSWER 1
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#define TRAVERSE_TYPE_GT_SUBGOAL 2
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#define TRAVERSE_TYPE_GT_ANSWER 3
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/* do not change order !!! */
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#define TRAVERSE_POSITION_NEXT 0
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#define TRAVERSE_POSITION_FIRST 1
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#define TRAVERSE_POSITION_LAST 2
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/* LowTagBits is 3 for 32 bit-machines and 7 for 64 bit-machines */
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#define NumberOfLowTagBits (LowTagBits == 3 ? 2 : 3)
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#define MakeTableVarTerm(INDEX) ((INDEX) << NumberOfLowTagBits)
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#define VarIndexOfTableTerm(TERM) (((unsigned int) (TERM)) >> NumberOfLowTagBits)
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#define VarIndexOfTerm(TERM) \
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((((CELL) (TERM)) - GLOBAL_table_var_enumerator(0)) / sizeof(CELL))
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#define IsTableVarTerm(TERM) \
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((CELL) (TERM)) >= GLOBAL_table_var_enumerator(0) && \
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((CELL) (TERM)) <= GLOBAL_table_var_enumerator(MAX_TABLE_VARS - 1)
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#ifdef TRIE_COMPACT_PAIRS
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#define PairTermMark NULL
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#define CompactPairInit AbsPair((Term *) 0)
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#define CompactPairEndTerm AbsPair((Term *) (LowTagBits + 1))
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#define CompactPairEndList AbsPair((Term *) (2*(LowTagBits + 1)))
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#endif /* TRIE_COMPACT_PAIRS */
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#define NORM_CP(CP) ((choiceptr)(CP))
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#define GEN_CP(CP) ((struct generator_choicept *)(CP))
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#define CONS_CP(CP) ((struct consumer_choicept *)(CP))
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#define LOAD_CP(CP) ((struct loader_choicept *)(CP))
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#ifdef DETERMINISTIC_TABLING
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#define DET_GEN_CP(CP) ((struct deterministic_generator_choicept *)(CP))
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#define IS_DET_GEN_CP(CP) (*(CELL*)(DET_GEN_CP(CP) + 1) <= MAX_TABLE_VARS)
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#define IS_BATCHED_NORM_GEN_CP(CP) (GEN_CP(CP)->cp_dep_fr == NULL)
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#define IS_BATCHED_GEN_CP(CP) (IS_DET_GEN_CP(CP) || IS_BATCHED_NORM_GEN_CP(CP))
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#else
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#define IS_BATCHED_GEN_CP(CP) (GEN_CP(CP)->cp_dep_fr == NULL)
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#endif /* DETERMINISTIC_TABLING */
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#define TAG_AS_SUBGOAL_LEAF_NODE(NODE) TrNode_child(NODE) = (sg_node_ptr)((unsigned long int) TrNode_child(NODE) | 0x1)
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#define UNTAG_SUBGOAL_LEAF_NODE(NODE) ((sg_fr_ptr)((unsigned long int) (NODE) & ~(0x1)))
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#define IS_SUBGOAL_LEAF_NODE(NODE) ((unsigned long int) TrNode_child(NODE) & 0x1)
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#define TAG_AS_ANSWER_LEAF_NODE(NODE) TrNode_parent(NODE) = (ans_node_ptr)((unsigned long int) TrNode_parent(NODE) | 0x1)
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#define UNTAG_ANSWER_LEAF_NODE(NODE) ((ans_node_ptr)((unsigned long int) (NODE) & ~(0x1)))
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#define IS_ANSWER_LEAF_NODE(NODE) ((unsigned long int) TrNode_parent(NODE) & 0x1)
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#define MAX_NODES_PER_TRIE_LEVEL 8
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#define MAX_NODES_PER_BUCKET (MAX_NODES_PER_TRIE_LEVEL / 2)
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#define BASE_HASH_BUCKETS 64
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#define HASH_ENTRY(ENTRY, SEED) ((((unsigned long int) ENTRY) >> NumberOfLowTagBits) & (SEED))
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#define SUBGOAL_TRIE_HASH_MARK ((Term) MakeTableVarTerm(MAX_TABLE_VARS))
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#define IS_SUBGOAL_TRIE_HASH(NODE) (TrNode_entry(NODE) == SUBGOAL_TRIE_HASH_MARK)
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#define ANSWER_TRIE_HASH_MARK 0
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#define IS_ANSWER_TRIE_HASH(NODE) (TrNode_instr(NODE) == ANSWER_TRIE_HASH_MARK)
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#define GLOBAL_TRIE_HASH_MARK ((Term) MakeTableVarTerm(MAX_TABLE_VARS))
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#define IS_GLOBAL_TRIE_HASH(NODE) (TrNode_entry(NODE) == GLOBAL_TRIE_HASH_MARK)
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#define HASH_TABLE_LOCK(NODE) ((((unsigned long int) (NODE)) >> 5) & (TABLE_LOCK_BUCKETS - 1))
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#define LOCK_TABLE(NODE) LOCK(GLOBAL_table_lock(HASH_TABLE_LOCK(NODE)))
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#define UNLOCK_TABLE(NODE) UNLOCK(GLOBAL_table_lock(HASH_TABLE_LOCK(NODE)))
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#define STACK_PUSH_UP(ITEM, STACK) *--(STACK) = (CELL)(ITEM)
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#define STACK_POP_UP(STACK) *--(STACK)
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#define STACK_PUSH_DOWN(ITEM, STACK) *(STACK)++ = (CELL)(ITEM)
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#define STACK_POP_DOWN(STACK) *(STACK)++
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#define STACK_NOT_EMPTY(STACK, STACK_BASE) (STACK) != (STACK_BASE)
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#define AUX_STACK_CHECK_EXPAND(STACK, STACK_LIMIT) if ((STACK_LIMIT) >= (STACK)) EXPAND_AUX_STACK(STACK)
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#define STACK_CHECK_EXPAND(STACK, STACK_LIMIT) if ((STACK_LIMIT) >= (STACK)+4096) EXPAND_STACK(STACK)
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#if defined(YAPOR_COPY) || defined(YAPOR_COW) || defined(YAPOR_SBA)
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#define EXPAND_AUX_STACK(STACK) Yap_Error(INTERNAL_ERROR, TermNil, "stack full (AUX_STACK_CHECK_EXPAND)");
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#define EXPAND_STACK(STACK) Yap_Error(INTERNAL_ERROR, TermNil, "stack full (STACK_CHECK_EXPAND)");
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#else /* YAPOR_THREADS */
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#define EXPAND_AUX_STACK(STACK) STACK = expand_auxiliary_stack(STACK)
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#define EXPAND_STACK(STACK) Yap_Error(INTERNAL_ERROR, TermNil, "stack full (STACK_CHECK_EXPAND)");
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#endif /* YAPOR */
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#define OPTYAP_ERROR_MESSAGE(OP, COND)
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/*************************************
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** Data structures macros **
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*************************************/
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#ifdef YAPOR
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#define frame_with_suspensions_not_collected(OR_FR) \
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(OrFr_nearest_suspnode(OR_FR) == NULL)
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#define find_dependency_node(SG_FR, LEADER_CP, DEP_ON_STACK) \
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if (SgFr_gen_worker(SG_FR) == worker_id) { \
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LEADER_CP = SgFr_gen_cp(SG_FR); \
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DEP_ON_STACK = TRUE; \
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} else { \
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or_fr_ptr aux_or_fr = SgFr_gen_top_or_fr(SG_FR); \
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while (! BITMAP_member(OrFr_members(aux_or_fr), worker_id)) \
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aux_or_fr = OrFr_next(aux_or_fr); \
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LEADER_CP = GetOrFr_node(aux_or_fr); \
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DEP_ON_STACK = (LEADER_CP == SgFr_gen_cp(SG_FR)); \
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}
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#define find_leader_node(LEADER_CP, DEP_ON_STACK) \
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{ dep_fr_ptr chain_dep_fr = LOCAL_top_dep_fr; \
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while (YOUNGER_CP(DepFr_cons_cp(chain_dep_fr), LEADER_CP)) { \
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if (LEADER_CP == DepFr_leader_cp(chain_dep_fr)) { \
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DEP_ON_STACK |= DepFr_leader_dep_is_on_stack(chain_dep_fr); \
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break; \
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} else if (YOUNGER_CP(LEADER_CP, DepFr_leader_cp(chain_dep_fr))) { \
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LEADER_CP = DepFr_leader_cp(chain_dep_fr); \
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DEP_ON_STACK = DepFr_leader_dep_is_on_stack(chain_dep_fr); \
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break; \
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} \
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chain_dep_fr = DepFr_next(chain_dep_fr); \
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} \
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}
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#ifdef TIMESTAMP
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#define DepFr_init_timestamp_field(DEP_FR) DepFr_timestamp(DEP_FR) = 0
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#else
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#define DepFr_init_timestamp_field(DEP_FR)
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#endif /* TIMESTAMP */
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#define YAPOR_SET_LOAD(CP_PTR) SCH_set_load(CP_PTR)
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#define SgFr_init_yapor_fields(SG_FR) \
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SgFr_gen_worker(SG_FR) = worker_id; \
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SgFr_gen_top_or_fr(SG_FR) = LOCAL_top_or_fr
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#define DepFr_init_yapor_fields(DEP_FR, DEP_ON_STACK, TOP_OR_FR) \
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DepFr_leader_dep_is_on_stack(DEP_FR) = DEP_ON_STACK; \
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DepFr_top_or_fr(DEP_FR) = TOP_OR_FR; \
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DepFr_init_timestamp_field(DEP_FR)
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#else
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#define find_dependency_node(SG_FR, LEADER_CP, DEP_ON_STACK) \
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LEADER_CP = SgFr_gen_cp(SG_FR); \
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DEP_ON_STACK = TRUE
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#define find_leader_node(LEADER_CP, DEP_ON_STACK) \
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{ dep_fr_ptr chain_dep_fr = LOCAL_top_dep_fr; \
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while (YOUNGER_CP(DepFr_cons_cp(chain_dep_fr), LEADER_CP)) { \
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if (EQUAL_OR_YOUNGER_CP(LEADER_CP, DepFr_leader_cp(chain_dep_fr))) { \
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LEADER_CP = DepFr_leader_cp(chain_dep_fr); \
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break; \
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} \
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chain_dep_fr = DepFr_next(chain_dep_fr); \
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} \
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}
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#define YAPOR_SET_LOAD(CP_PTR)
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#define SgFr_init_yapor_fields(SG_FR)
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#define DepFr_init_yapor_fields(DEP_FR, DEP_ON_STACK, TOP_OR_FR)
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#endif /* YAPOR */
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#ifdef TABLE_LOCK_AT_ENTRY_LEVEL
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#define TabEnt_init_lock_field(TAB_ENT) \
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INIT_LOCK(TabEnt_lock(TAB_ENT))
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#define SgHash_init_next_field(HASH, TAB_ENT) \
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Hash_next(HASH) = TabEnt_hash_chain(TAB_ENT); \
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TabEnt_hash_chain(TAB_ENT) = HASH
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#define AnsHash_init_next_field(HASH, SG_FR) \
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Hash_next(HASH) = SgFr_hash_chain(SG_FR); \
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SgFr_hash_chain(SG_FR) = HASH
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#else
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#define TabEnt_init_lock_field(TAB_ENT)
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#define SgHash_init_next_field(HASH, TAB_ENT) \
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LOCK(TabEnt_lock(TAB_ENT)); \
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Hash_next(HASH) = TabEnt_hash_chain(TAB_ENT); \
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TabEnt_hash_chain(TAB_ENT) = HASH; \
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UNLOCK(TabEnt_lock(TAB_ENT))
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#define AnsHash_init_next_field(HASH, SG_FR) \
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LOCK(SgFr_lock(SG_FR)); \
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Hash_next(HASH) = SgFr_hash_chain(SG_FR); \
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SgFr_hash_chain(SG_FR) = HASH; \
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UNLOCK(SgFr_lock(SG_FR))
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#endif /* TABLE_LOCK_AT_ENTRY_LEVEL */
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#ifdef TABLE_LOCK_AT_NODE_LEVEL
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#define TrNode_init_lock_field(NODE) \
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INIT_LOCK(TrNode_lock(NODE))
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#else
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#define TrNode_init_lock_field(NODE)
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#endif /* TABLE_LOCK_AT_NODE_LEVEL */
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#define new_table_entry(TAB_ENT, PRED_ENTRY, ATOM, ARITY) \
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{ register sg_node_ptr sg_node; \
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new_subgoal_trie_node(sg_node, 0, NULL, NULL, NULL); \
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ALLOC_TABLE_ENTRY(TAB_ENT); \
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TabEnt_init_lock_field(TAB_ENT); \
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TabEnt_pe(TAB_ENT) = PRED_ENTRY; \
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TabEnt_atom(TAB_ENT) = ATOM; \
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TabEnt_arity(TAB_ENT) = ARITY; \
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TabEnt_flags(TAB_ENT) = 0; \
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SetMode_Batched(TabEnt_flags(TAB_ENT)); \
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SetMode_ExecAnswers(TabEnt_flags(TAB_ENT)); \
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SetMode_LocalTrie(TabEnt_flags(TAB_ENT)); \
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TabEnt_mode(TAB_ENT) = TabEnt_flags(TAB_ENT); \
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if (IsMode_Local(yap_flags[TABLING_MODE_FLAG])) \
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SetMode_Local(TabEnt_mode(TAB_ENT)); \
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if (IsMode_LoadAnswers(yap_flags[TABLING_MODE_FLAG])) \
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SetMode_LoadAnswers(TabEnt_mode(TAB_ENT)); \
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if (IsMode_GlobalTrie(yap_flags[TABLING_MODE_FLAG])) \
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SetMode_GlobalTrie(TabEnt_mode(TAB_ENT)); \
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TabEnt_subgoal_trie(TAB_ENT) = sg_node; \
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TabEnt_hash_chain(TAB_ENT) = NULL; \
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TabEnt_next(TAB_ENT) = GLOBAL_root_tab_ent; \
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GLOBAL_root_tab_ent = TAB_ENT; \
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}
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#define new_subgoal_frame(SG_FR, CODE) \
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{ register ans_node_ptr ans_node; \
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new_answer_trie_node(ans_node, 0, 0, NULL, NULL, NULL); \
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ALLOC_SUBGOAL_FRAME(SG_FR); \
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INIT_LOCK(SgFr_lock(SG_FR)); \
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SgFr_code(SG_FR) = CODE; \
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SgFr_state(SG_FR) = ready; \
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SgFr_hash_chain(SG_FR) = NULL; \
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SgFr_answer_trie(SG_FR) = ans_node; \
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SgFr_first_answer(SG_FR) = NULL; \
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SgFr_last_answer(SG_FR) = NULL; \
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}
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#define init_subgoal_frame(SG_FR) \
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{ SgFr_init_yapor_fields(SG_FR); \
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SgFr_state(SG_FR) = evaluating; \
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SgFr_next(SG_FR) = LOCAL_top_sg_fr; \
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LOCAL_top_sg_fr = SG_FR; \
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}
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#define new_dependency_frame(DEP_FR, DEP_ON_STACK, TOP_OR_FR, LEADER_CP, CONS_CP, SG_FR, NEXT) \
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ALLOC_DEPENDENCY_FRAME(DEP_FR); \
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INIT_LOCK(DepFr_lock(DEP_FR)); \
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DepFr_init_yapor_fields(DEP_FR, DEP_ON_STACK, TOP_OR_FR); \
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DepFr_backchain_cp(DEP_FR) = NULL; \
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DepFr_leader_cp(DEP_FR) = NORM_CP(LEADER_CP); \
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DepFr_cons_cp(DEP_FR) = NORM_CP(CONS_CP); \
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/* start with TrNode_child(DepFr_last_answer(DEP_FR)) pointing to SgFr_first_answer(SG_FR) */ \
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DepFr_last_answer(DEP_FR) = (ans_node_ptr) ((unsigned long int) (SG_FR) + \
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(unsigned long int) (&SgFr_first_answer((sg_fr_ptr)DEP_FR)) - \
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(unsigned long int) (&TrNode_child((ans_node_ptr)DEP_FR))); \
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DepFr_next(DEP_FR) = NEXT
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#define new_suspension_frame(SUSP_FR, TOP_OR_FR_ON_STACK, TOP_DEP, TOP_SG, \
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H_REG, B_REG, TR_REG, H_SIZE, B_SIZE, TR_SIZE) \
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ALLOC_SUSPENSION_FRAME(SUSP_FR); \
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SuspFr_top_or_fr_on_stack(SUSP_FR) = TOP_OR_FR_ON_STACK; \
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SuspFr_top_dep_fr(SUSP_FR) = TOP_DEP; \
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SuspFr_top_sg_fr(SUSP_FR) = TOP_SG; \
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SuspFr_global_reg(SUSP_FR) = (void *) (H_REG); \
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SuspFr_local_reg(SUSP_FR) = (void *) (B_REG); \
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SuspFr_trail_reg(SUSP_FR) = (void *) (TR_REG); \
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ALLOC_BLOCK(SuspFr_global_start(SUSP_FR), H_SIZE + B_SIZE + TR_SIZE, void *); \
|
|
SuspFr_local_start(SUSP_FR) = SuspFr_global_start(SUSP_FR) + H_SIZE; \
|
|
SuspFr_trail_start(SUSP_FR) = SuspFr_local_start(SUSP_FR) + B_SIZE; \
|
|
SuspFr_global_size(SUSP_FR) = H_SIZE; \
|
|
SuspFr_local_size(SUSP_FR) = B_SIZE; \
|
|
SuspFr_trail_size(SUSP_FR) = TR_SIZE; \
|
|
memcpy(SuspFr_global_start(SUSP_FR), SuspFr_global_reg(SUSP_FR), H_SIZE); \
|
|
memcpy(SuspFr_local_start(SUSP_FR), SuspFr_local_reg(SUSP_FR), B_SIZE); \
|
|
memcpy(SuspFr_trail_start(SUSP_FR), SuspFr_trail_reg(SUSP_FR), TR_SIZE)
|
|
|
|
#define new_subgoal_trie_node(NODE, ENTRY, CHILD, PARENT, NEXT) \
|
|
ALLOC_SUBGOAL_TRIE_NODE(NODE); \
|
|
TrNode_entry(NODE) = ENTRY; \
|
|
TrNode_init_lock_field(NODE); \
|
|
TrNode_child(NODE) = CHILD; \
|
|
TrNode_parent(NODE) = PARENT; \
|
|
TrNode_next(NODE) = NEXT
|
|
|
|
#define new_answer_trie_node(NODE, INSTR, ENTRY, CHILD, PARENT, NEXT) \
|
|
ALLOC_ANSWER_TRIE_NODE(NODE); \
|
|
TrNode_instr(NODE) = INSTR; \
|
|
TrNode_entry(NODE) = ENTRY; \
|
|
TrNode_init_lock_field(NODE); \
|
|
TrNode_child(NODE) = CHILD; \
|
|
TrNode_parent(NODE) = PARENT; \
|
|
TrNode_next(NODE) = NEXT
|
|
|
|
#define new_global_trie_node(NODE, ENTRY, CHILD, PARENT, NEXT) \
|
|
ALLOC_GLOBAL_TRIE_NODE(NODE); \
|
|
TrNode_entry(NODE) = ENTRY; \
|
|
TrNode_child(NODE) = CHILD; \
|
|
TrNode_parent(NODE) = PARENT; \
|
|
TrNode_next(NODE) = NEXT
|
|
|
|
#define new_subgoal_trie_hash(HASH, NUM_NODES, TAB_ENT) \
|
|
ALLOC_SUBGOAL_TRIE_HASH(HASH); \
|
|
Hash_mark(HASH) = SUBGOAL_TRIE_HASH_MARK; \
|
|
Hash_num_buckets(HASH) = BASE_HASH_BUCKETS; \
|
|
ALLOC_HASH_BUCKETS(Hash_buckets(HASH), BASE_HASH_BUCKETS); \
|
|
Hash_num_nodes(HASH) = NUM_NODES; \
|
|
SgHash_init_next_field(HASH, TAB_ENT)
|
|
|
|
#define new_answer_trie_hash(HASH, NUM_NODES, SG_FR) \
|
|
ALLOC_ANSWER_TRIE_HASH(HASH); \
|
|
Hash_mark(HASH) = ANSWER_TRIE_HASH_MARK; \
|
|
Hash_num_buckets(HASH) = BASE_HASH_BUCKETS; \
|
|
ALLOC_HASH_BUCKETS(Hash_buckets(HASH), BASE_HASH_BUCKETS); \
|
|
Hash_num_nodes(HASH) = NUM_NODES; \
|
|
AnsHash_init_next_field(HASH, SG_FR)
|
|
|
|
#define new_global_trie_hash(HASH, NUM_NODES) \
|
|
ALLOC_GLOBAL_TRIE_HASH(HASH); \
|
|
Hash_mark(HASH) = GLOBAL_TRIE_HASH_MARK; \
|
|
Hash_num_buckets(HASH) = BASE_HASH_BUCKETS; \
|
|
ALLOC_HASH_BUCKETS(Hash_buckets(HASH), BASE_HASH_BUCKETS); \
|
|
Hash_num_nodes(HASH) = NUM_NODES
|
|
|
|
#ifdef LIMIT_TABLING
|
|
#define insert_into_global_sg_fr_list(SG_FR) \
|
|
SgFr_previous(SG_FR) = GLOBAL_last_sg_fr; \
|
|
SgFr_next(SG_FR) = NULL; \
|
|
if (GLOBAL_first_sg_fr == NULL) \
|
|
GLOBAL_first_sg_fr = SG_FR; \
|
|
else \
|
|
SgFr_next(GLOBAL_last_sg_fr) = SG_FR; \
|
|
GLOBAL_last_sg_fr = SG_FR
|
|
#define remove_from_global_sg_fr_list(SG_FR) \
|
|
if (SgFr_previous(SG_FR)) { \
|
|
if ((SgFr_next(SgFr_previous(SG_FR)) = SgFr_next(SG_FR)) != NULL) \
|
|
SgFr_previous(SgFr_next(SG_FR)) = SgFr_previous(SG_FR); \
|
|
else \
|
|
GLOBAL_last_sg_fr = SgFr_previous(SG_FR); \
|
|
} else { \
|
|
if ((GLOBAL_first_sg_fr = SgFr_next(SG_FR)) != NULL) \
|
|
SgFr_previous(SgFr_next(SG_FR)) = NULL; \
|
|
else \
|
|
GLOBAL_last_sg_fr = NULL; \
|
|
} \
|
|
if (GLOBAL_check_sg_fr == SG_FR) \
|
|
GLOBAL_check_sg_fr = SgFr_previous(SG_FR)
|
|
#else
|
|
#define insert_into_global_sg_fr_list(SG_FR)
|
|
#define remove_from_global_sg_fr_list(SG_FR)
|
|
#endif /* LIMIT_TABLING */
|
|
|
|
|
|
|
|
/******************************
|
|
** Inline funcions **
|
|
******************************/
|
|
|
|
static inline Int freeze_current_cp(void) {
|
|
CACHE_REGS
|
|
choiceptr freeze_cp = B;
|
|
|
|
B_FZ = freeze_cp;
|
|
H_FZ = freeze_cp->cp_h;
|
|
TR_FZ = freeze_cp->cp_tr;
|
|
B = B->cp_b;
|
|
HB = B->cp_h;
|
|
return (LOCAL_LocalBase - (ADDR)freeze_cp);
|
|
}
|
|
|
|
|
|
static inline void wake_frozen_cp(Int frozen_offset) {
|
|
CACHE_REGS
|
|
choiceptr frozen_cp = (choiceptr)(LOCAL_LocalBase - frozen_offset);
|
|
|
|
restore_bindings(TR, frozen_cp->cp_tr);
|
|
B = frozen_cp;
|
|
TR = TR_FZ;
|
|
TRAIL_LINK(B->cp_tr);
|
|
return;
|
|
}
|
|
|
|
|
|
static inline void abolish_frozen_cps_until(Int frozen_offset) {
|
|
CACHE_REGS
|
|
choiceptr frozen_cp = (choiceptr)(LOCAL_LocalBase - frozen_offset);
|
|
|
|
B_FZ = frozen_cp;
|
|
H_FZ = frozen_cp->cp_h;
|
|
TR_FZ = frozen_cp->cp_tr;
|
|
return;
|
|
}
|
|
|
|
|
|
static inline void abolish_frozen_cps_all(void) {
|
|
CACHE_REGS
|
|
B_FZ = (choiceptr) LOCAL_LocalBase;
|
|
H_FZ = (CELL *) LOCAL_GlobalBase;
|
|
TR_FZ = (tr_fr_ptr) LOCAL_TrailBase;
|
|
return;
|
|
}
|
|
|
|
|
|
static inline void adjust_freeze_registers(void) {
|
|
CACHE_REGS
|
|
B_FZ = DepFr_cons_cp(LOCAL_top_dep_fr);
|
|
H_FZ = B_FZ->cp_h;
|
|
TR_FZ = B_FZ->cp_tr;
|
|
return;
|
|
}
|
|
|
|
|
|
static inline void mark_as_completed(sg_fr_ptr sg_fr) {
|
|
LOCK(SgFr_lock(sg_fr));
|
|
SgFr_state(sg_fr) = complete;
|
|
UNLOCK(SgFr_lock(sg_fr));
|
|
return;
|
|
}
|
|
|
|
|
|
static inline void unbind_variables(tr_fr_ptr unbind_tr, tr_fr_ptr end_tr) {
|
|
CACHE_REGS
|
|
TABLING_ERROR_CHECKING(unbind_variables, unbind_tr < end_tr);
|
|
/* unbind loop */
|
|
while (unbind_tr != end_tr) {
|
|
CELL ref = (CELL) TrailTerm(--unbind_tr);
|
|
/* check for global or local variables */
|
|
if (IsVarTerm(ref)) {
|
|
/* unbind variable */
|
|
RESET_VARIABLE(ref);
|
|
} else if (IsPairTerm(ref)) {
|
|
ref = (CELL) RepPair(ref);
|
|
if (IN_BETWEEN(LOCAL_TrailBase, ref, LOCAL_TrailTop)) {
|
|
/* avoid frozen segments */
|
|
unbind_tr = (tr_fr_ptr) ref;
|
|
TABLING_ERROR_CHECKING(unbind_variables, unbind_tr > (tr_fr_ptr) LOCAL_TrailTop);
|
|
TABLING_ERROR_CHECKING(unbind_variables, unbind_tr < end_tr);
|
|
}
|
|
#ifdef MULTI_ASSIGNMENT_VARIABLES
|
|
} else {
|
|
CELL *aux_ptr = RepAppl(ref);
|
|
--unbind_tr;
|
|
Term aux_val = TrailVal(unbind_tr);
|
|
*aux_ptr = aux_val;
|
|
#endif /* MULTI_ASSIGNMENT_VARIABLES */
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
static inline void rebind_variables(tr_fr_ptr rebind_tr, tr_fr_ptr end_tr) {
|
|
CACHE_REGS
|
|
TABLING_ERROR_CHECKING(rebind_variables, rebind_tr < end_tr);
|
|
/* rebind loop */
|
|
Yap_NEW_MAHASH((ma_h_inner_struct *)H PASS_REGS);
|
|
while (rebind_tr != end_tr) {
|
|
CELL ref = (CELL) TrailTerm(--rebind_tr);
|
|
/* check for global or local variables */
|
|
if (IsVarTerm(ref)) {
|
|
/* rebind variable */
|
|
*((CELL *)ref) = TrailVal(rebind_tr);
|
|
} else if (IsPairTerm(ref)) {
|
|
ref = (CELL) RepPair(ref);
|
|
if (IN_BETWEEN(LOCAL_TrailBase, ref, LOCAL_TrailTop)) {
|
|
/* avoid frozen segments */
|
|
rebind_tr = (tr_fr_ptr) ref;
|
|
TABLING_ERROR_CHECKING(rebind_variables, rebind_tr > (tr_fr_ptr) LOCAL_TrailTop);
|
|
TABLING_ERROR_CHECKING(rebind_variables, rebind_tr < end_tr);
|
|
}
|
|
#ifdef MULTI_ASSIGNMENT_VARIABLES
|
|
} else {
|
|
CELL *cell_ptr = RepAppl(ref);
|
|
if (!Yap_lookup_ma_var(cell_ptr PASS_REGS)) {
|
|
/* first time we found the variable, let's put the new value */
|
|
*cell_ptr = TrailVal(rebind_tr);
|
|
}
|
|
--rebind_tr;
|
|
#endif /* MULTI_ASSIGNMENT_VARIABLES */
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
static inline void restore_bindings(tr_fr_ptr unbind_tr, tr_fr_ptr rebind_tr) {
|
|
CACHE_REGS
|
|
CELL ref;
|
|
tr_fr_ptr end_tr;
|
|
|
|
TABLING_ERROR_CHECKING(restore_variables, unbind_tr < rebind_tr);
|
|
end_tr = rebind_tr;
|
|
Yap_NEW_MAHASH((ma_h_inner_struct *)H PASS_REGS);
|
|
while (unbind_tr != end_tr) {
|
|
/* unbind loop */
|
|
while (unbind_tr > end_tr) {
|
|
ref = (CELL) TrailTerm(--unbind_tr);
|
|
if (IsVarTerm(ref)) {
|
|
RESET_VARIABLE(ref);
|
|
} else if (IsPairTerm(ref)) {
|
|
ref = (CELL) RepPair(ref);
|
|
if (IN_BETWEEN(LOCAL_TrailBase, ref, LOCAL_TrailTop)) {
|
|
/* avoid frozen segments */
|
|
unbind_tr = (tr_fr_ptr) ref;
|
|
TABLING_ERROR_CHECKING(restore_variables, unbind_tr > (tr_fr_ptr) LOCAL_TrailTop);
|
|
}
|
|
#ifdef MULTI_ASSIGNMENT_VARIABLES
|
|
} else if (IsApplTerm(ref)) {
|
|
CELL *pt = RepAppl(ref);
|
|
|
|
/* AbsAppl means */
|
|
/* multi-assignment variable */
|
|
/* so that the upper cell is the old value */
|
|
--unbind_tr;
|
|
if (!Yap_lookup_ma_var(pt PASS_REGS)) {
|
|
pt[0] = TrailVal(unbind_tr);
|
|
}
|
|
#endif /* MULTI_ASSIGNMENT_VARIABLES */
|
|
}
|
|
}
|
|
/* look for end */
|
|
while (unbind_tr < end_tr) {
|
|
ref = (CELL) TrailTerm(--end_tr);
|
|
if (IsPairTerm(ref)) {
|
|
ref = (CELL) RepPair(ref);
|
|
if (IN_BETWEEN(LOCAL_TrailBase, ref, LOCAL_TrailTop)) {
|
|
/* avoid frozen segments */
|
|
end_tr = (tr_fr_ptr) ref;
|
|
TABLING_ERROR_CHECKING(restore_variables, end_tr > (tr_fr_ptr) LOCAL_TrailTop);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/* rebind loop */
|
|
while (rebind_tr != end_tr) {
|
|
ref = (CELL) TrailTerm(--rebind_tr);
|
|
if (IsVarTerm(ref)) {
|
|
*((CELL *)ref) = TrailVal(rebind_tr);
|
|
} else if (IsPairTerm(ref)) {
|
|
ref = (CELL) RepPair(ref);
|
|
if (IN_BETWEEN(LOCAL_TrailBase, ref, LOCAL_TrailTop)) {
|
|
/* avoid frozen segments */
|
|
rebind_tr = (tr_fr_ptr) ref;
|
|
TABLING_ERROR_CHECKING(restore_variables, rebind_tr > (tr_fr_ptr) LOCAL_TrailTop);
|
|
TABLING_ERROR_CHECKING(restore_variables, rebind_tr < end_tr);
|
|
}
|
|
#ifdef MULTI_ASSIGNMENT_VARIABLES
|
|
} else {
|
|
CELL *cell_ptr = RepAppl(ref);
|
|
/* first time we found the variable, let's put the new value */
|
|
*cell_ptr = TrailVal(rebind_tr);
|
|
--rebind_tr;
|
|
#endif /* MULTI_ASSIGNMENT_VARIABLES */
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
static inline CELL *expand_auxiliary_stack(CELL *stack) {
|
|
CACHE_REGS
|
|
void *old_top = LOCAL_TrailTop;
|
|
INFORMATION_MESSAGE("Expanding trail in 64 Kbytes");
|
|
if (! Yap_growtrail(K64, TRUE)) { /* TRUE means 'contiguous_only' */
|
|
Yap_Error(OUT_OF_TRAIL_ERROR, TermNil, "stack full (STACK_CHECK_EXPAND)");
|
|
return NULL;
|
|
} else {
|
|
UInt diff = (void *)LOCAL_TrailTop - old_top;
|
|
CELL *new_stack = (CELL *)((void *)stack + diff);
|
|
memmove((void *)new_stack, (void *)stack, old_top - (void *)stack);
|
|
return new_stack;
|
|
}
|
|
}
|
|
|
|
|
|
static inline void abolish_incomplete_subgoals(choiceptr prune_cp) {
|
|
CACHE_REGS
|
|
|
|
#ifdef YAPOR
|
|
if (EQUAL_OR_YOUNGER_CP(GetOrFr_node(LOCAL_top_susp_or_fr), prune_cp))
|
|
pruning_over_tabling_data_structures();
|
|
#endif /* YAPOR */
|
|
|
|
if (EQUAL_OR_YOUNGER_CP(DepFr_cons_cp(LOCAL_top_dep_fr), prune_cp)) {
|
|
#ifdef YAPOR
|
|
if (GLOBAL_parallel_mode == PARALLEL_MODE_RUNNING)
|
|
pruning_over_tabling_data_structures();
|
|
#endif /* YAPOR */
|
|
do {
|
|
dep_fr_ptr dep_fr = LOCAL_top_dep_fr;
|
|
LOCAL_top_dep_fr = DepFr_next(dep_fr);
|
|
FREE_DEPENDENCY_FRAME(dep_fr);
|
|
} while (EQUAL_OR_YOUNGER_CP(DepFr_cons_cp(LOCAL_top_dep_fr), prune_cp));
|
|
adjust_freeze_registers();
|
|
}
|
|
|
|
while (LOCAL_top_sg_fr && EQUAL_OR_YOUNGER_CP(SgFr_gen_cp(LOCAL_top_sg_fr), prune_cp)) {
|
|
sg_fr_ptr sg_fr;
|
|
#ifdef YAPOR
|
|
if (GLOBAL_parallel_mode == PARALLEL_MODE_RUNNING)
|
|
pruning_over_tabling_data_structures();
|
|
#endif /* YAPOR */
|
|
sg_fr = LOCAL_top_sg_fr;
|
|
LOCAL_top_sg_fr = SgFr_next(sg_fr);
|
|
LOCK(SgFr_lock(sg_fr));
|
|
if (SgFr_first_answer(sg_fr) == NULL) {
|
|
/* no answers --> ready */
|
|
SgFr_state(sg_fr) = ready;
|
|
UNLOCK(SgFr_lock(sg_fr));
|
|
} else if (SgFr_first_answer(sg_fr) == SgFr_answer_trie(sg_fr)) {
|
|
/* yes answer --> complete */
|
|
#ifndef TABLING_EARLY_COMPLETION
|
|
/* with early completion, at this point the subgoal should be already completed */
|
|
SgFr_state(sg_fr) = complete;
|
|
#endif /* TABLING_EARLY_COMPLETION */
|
|
UNLOCK(SgFr_lock(sg_fr));
|
|
} else {
|
|
/* answers --> incomplete/ready */
|
|
#ifdef INCOMPLETE_TABLING
|
|
SgFr_state(sg_fr) = incomplete;
|
|
UNLOCK(SgFr_lock(sg_fr));
|
|
#else
|
|
ans_node_ptr node;
|
|
SgFr_state(sg_fr) = ready;
|
|
free_answer_hash_chain(SgFr_hash_chain(sg_fr));
|
|
SgFr_hash_chain(sg_fr) = NULL;
|
|
SgFr_first_answer(sg_fr) = NULL;
|
|
SgFr_last_answer(sg_fr) = NULL;
|
|
node = TrNode_child(SgFr_answer_trie(sg_fr));
|
|
TrNode_child(SgFr_answer_trie(sg_fr)) = NULL;
|
|
UNLOCK(SgFr_lock(sg_fr));
|
|
free_answer_trie(node, TRAVERSE_MODE_NORMAL, TRAVERSE_POSITION_FIRST);
|
|
#endif /* INCOMPLETE_TABLING */
|
|
}
|
|
#ifdef LIMIT_TABLING
|
|
insert_into_global_sg_fr_list(sg_fr);
|
|
#endif /* LIMIT_TABLING */
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
#ifdef YAPOR
|
|
static inline void pruning_over_tabling_data_structures(void) {
|
|
Yap_Error(INTERNAL_ERROR, TermNil, "pruning over tabling data structures");
|
|
return;
|
|
}
|
|
|
|
|
|
static inline void collect_suspension_frames(or_fr_ptr or_fr) {
|
|
CACHE_REGS
|
|
int depth;
|
|
or_fr_ptr *susp_ptr;
|
|
|
|
OPTYAP_ERROR_CHECKING(collect_suspension_frames, IS_UNLOCKED(or_fr));
|
|
OPTYAP_ERROR_CHECKING(collect_suspension_frames, OrFr_suspensions(or_fr) == NULL);
|
|
|
|
/* order collected suspension frames by depth */
|
|
depth = OrFr_depth(or_fr);
|
|
susp_ptr = & LOCAL_top_susp_or_fr;
|
|
while (OrFr_depth(*susp_ptr) > depth)
|
|
susp_ptr = & OrFr_nearest_suspnode(*susp_ptr);
|
|
OrFr_nearest_suspnode(or_fr) = *susp_ptr;
|
|
*susp_ptr = or_fr;
|
|
return;
|
|
}
|
|
|
|
|
|
static inline
|
|
#ifdef TIMESTAMP_CHECK
|
|
susp_fr_ptr suspension_frame_to_resume(or_fr_ptr susp_or_fr, long timestamp) {
|
|
#else
|
|
susp_fr_ptr suspension_frame_to_resume(or_fr_ptr susp_or_fr) {
|
|
#endif /* TIMESTAMP_CHECK */
|
|
choiceptr top_cp;
|
|
susp_fr_ptr *susp_ptr, susp_fr;
|
|
dep_fr_ptr dep_fr;
|
|
|
|
top_cp = GetOrFr_node(susp_or_fr);
|
|
susp_ptr = & OrFr_suspensions(susp_or_fr);
|
|
susp_fr = *susp_ptr;
|
|
while (susp_fr) {
|
|
dep_fr = SuspFr_top_dep_fr(susp_fr);
|
|
do {
|
|
if (TrNode_child(DepFr_last_answer(dep_fr))) {
|
|
/* unconsumed answers in susp_fr */
|
|
*susp_ptr = SuspFr_next(susp_fr);
|
|
return susp_fr;
|
|
}
|
|
#ifdef TIMESTAMP_CHECK
|
|
DepFr_timestamp(dep_fr) = timestamp;
|
|
#endif /* TIMESTAMP_CHECK */
|
|
dep_fr = DepFr_next(dep_fr);
|
|
#ifdef TIMESTAMP_CHECK
|
|
} while (timestamp > DepFr_timestamp(dep_fr) && YOUNGER_CP(DepFr_cons_cp(dep_fr), top_cp));
|
|
#else
|
|
} while (YOUNGER_CP(DepFr_cons_cp(dep_fr), top_cp));
|
|
#endif /* TIMESTAMP_CHECK */
|
|
susp_ptr = & SuspFr_next(susp_fr);
|
|
susp_fr = *susp_ptr;
|
|
}
|
|
/* no suspension frame with unconsumed answers */
|
|
return NULL;
|
|
}
|
|
#endif /* YAPOR */
|
|
|
|
|
|
#ifdef TABLING_INNER_CUTS
|
|
static inline void CUT_store_tg_answer(or_fr_ptr or_frame, ans_node_ptr ans_node, choiceptr gen_cp, int ltt) {
|
|
tg_sol_fr_ptr tg_sol_fr, *solution_ptr, next, ltt_next;
|
|
tg_ans_fr_ptr tg_ans_fr;
|
|
|
|
solution_ptr = & OrFr_tg_solutions(or_frame);
|
|
while (*solution_ptr && YOUNGER_CP(gen_cp, TgSolFr_gen_cp(*solution_ptr))) {
|
|
solution_ptr = & TgSolFr_next(*solution_ptr);
|
|
}
|
|
if (*solution_ptr && gen_cp == TgSolFr_gen_cp(*solution_ptr)) {
|
|
if (ltt >= TgSolFr_ltt(*solution_ptr)) {
|
|
while (*solution_ptr && ltt > TgSolFr_ltt(*solution_ptr)) {
|
|
solution_ptr = & TgSolFr_ltt_next(*solution_ptr);
|
|
}
|
|
if (*solution_ptr && ltt == TgSolFr_ltt(*solution_ptr)) {
|
|
tg_ans_fr = TgSolFr_first(*solution_ptr);
|
|
if (TgAnsFr_free_slot(tg_ans_fr) == TG_ANSWER_SLOTS) {
|
|
ALLOC_TG_ANSWER_FRAME(tg_ans_fr);
|
|
TgAnsFr_free_slot(tg_ans_fr) = 1;
|
|
TgAnsFr_answer(tg_ans_fr, 0) = ans_node;
|
|
TgAnsFr_next(tg_ans_fr) = TgSolFr_first(*solution_ptr);
|
|
TgSolFr_first(*solution_ptr) = tg_ans_fr;
|
|
} else {
|
|
TgAnsFr_answer(tg_ans_fr, TgAnsFr_free_slot(tg_ans_fr)) = ans_node;
|
|
TgAnsFr_free_slot(tg_ans_fr)++;
|
|
}
|
|
return;
|
|
}
|
|
ltt_next = *solution_ptr;
|
|
next = NULL;
|
|
} else {
|
|
ltt_next = *solution_ptr;
|
|
next = TgSolFr_next(*solution_ptr);
|
|
}
|
|
} else {
|
|
ltt_next = NULL;
|
|
next = *solution_ptr;
|
|
}
|
|
ALLOC_TG_ANSWER_FRAME(tg_ans_fr);
|
|
TgAnsFr_free_slot(tg_ans_fr) = 1;
|
|
TgAnsFr_answer(tg_ans_fr, 0) = ans_node;
|
|
TgAnsFr_next(tg_ans_fr) = NULL;
|
|
ALLOC_TG_SOLUTION_FRAME(tg_sol_fr);
|
|
TgSolFr_gen_cp(tg_sol_fr) = gen_cp;
|
|
TgSolFr_ltt(tg_sol_fr) = ltt;
|
|
TgSolFr_first(tg_sol_fr) = tg_ans_fr;
|
|
TgSolFr_last(tg_sol_fr) = tg_ans_fr;
|
|
TgSolFr_ltt_next(tg_sol_fr) = ltt_next;
|
|
TgSolFr_next(tg_sol_fr) = next;
|
|
*solution_ptr = tg_sol_fr;
|
|
return;
|
|
}
|
|
|
|
|
|
static inline tg_sol_fr_ptr CUT_store_tg_answers(or_fr_ptr or_frame, tg_sol_fr_ptr new_solution, int ltt) {
|
|
tg_sol_fr_ptr *old_solution_ptr, next_new_solution;
|
|
choiceptr node, gen_cp;
|
|
|
|
old_solution_ptr = & OrFr_tg_solutions(or_frame);
|
|
node = GetOrFr_node(or_frame);
|
|
while (new_solution && YOUNGER_CP(node, TgSolFr_gen_cp(new_solution))) {
|
|
next_new_solution = TgSolFr_next(new_solution);
|
|
gen_cp = TgSolFr_gen_cp(new_solution);
|
|
while (*old_solution_ptr && YOUNGER_CP(gen_cp, TgSolFr_gen_cp(*old_solution_ptr))) {
|
|
old_solution_ptr = & TgSolFr_next(*old_solution_ptr);
|
|
}
|
|
if (*old_solution_ptr && gen_cp == TgSolFr_gen_cp(*old_solution_ptr)) {
|
|
if (ltt >= TgSolFr_ltt(*old_solution_ptr)) {
|
|
tg_sol_fr_ptr *ltt_next_old_solution_ptr;
|
|
ltt_next_old_solution_ptr = old_solution_ptr;
|
|
while (*ltt_next_old_solution_ptr && ltt > TgSolFr_ltt(*ltt_next_old_solution_ptr)) {
|
|
ltt_next_old_solution_ptr = & TgSolFr_ltt_next(*ltt_next_old_solution_ptr);
|
|
}
|
|
if (*ltt_next_old_solution_ptr && ltt == TgSolFr_ltt(*ltt_next_old_solution_ptr)) {
|
|
TgAnsFr_next(TgSolFr_last(*ltt_next_old_solution_ptr)) = TgSolFr_first(new_solution);
|
|
TgSolFr_last(*ltt_next_old_solution_ptr) = TgSolFr_last(new_solution);
|
|
FREE_TG_SOLUTION_FRAME(new_solution);
|
|
} else {
|
|
TgSolFr_ltt(new_solution) = ltt;
|
|
TgSolFr_ltt_next(new_solution) = *ltt_next_old_solution_ptr;
|
|
TgSolFr_next(new_solution) = NULL;
|
|
*ltt_next_old_solution_ptr = new_solution;
|
|
}
|
|
} else {
|
|
TgSolFr_ltt(new_solution) = ltt;
|
|
TgSolFr_ltt_next(new_solution) = *old_solution_ptr;
|
|
TgSolFr_next(new_solution) = TgSolFr_next(*old_solution_ptr);
|
|
*old_solution_ptr = new_solution;
|
|
}
|
|
} else {
|
|
TgSolFr_ltt(new_solution) = ltt;
|
|
TgSolFr_ltt_next(new_solution) = NULL;
|
|
TgSolFr_next(new_solution) = *old_solution_ptr;
|
|
*old_solution_ptr = new_solution;
|
|
}
|
|
old_solution_ptr = & TgSolFr_next(*old_solution_ptr);
|
|
new_solution = next_new_solution;
|
|
}
|
|
return new_solution;
|
|
}
|
|
|
|
|
|
static inline void CUT_validate_tg_answers(tg_sol_fr_ptr valid_solutions) {
|
|
tg_ans_fr_ptr valid_answers, free_answer;
|
|
tg_sol_fr_ptr ltt_valid_solutions, free_solution;
|
|
ans_node_ptr first_answer, last_answer, ans_node;
|
|
sg_fr_ptr sg_fr;
|
|
int slots;
|
|
|
|
while (valid_solutions) {
|
|
first_answer = last_answer = NULL;
|
|
#ifdef DETERMINISTIC_TABLING
|
|
if (IS_DET_GEN_CP(TgSolFr_gen_cp(valid_solutions)))
|
|
sg_fr = DET_GEN_CP(TgSolFr_gen_cp(valid_solutions))->cp_sg_fr;
|
|
else
|
|
#endif /* DETERMINISTIC_TABLING */
|
|
sg_fr = GEN_CP(TgSolFr_gen_cp(valid_solutions))->cp_sg_fr;
|
|
ltt_valid_solutions = valid_solutions;
|
|
valid_solutions = TgSolFr_next(valid_solutions);
|
|
do {
|
|
valid_answers = TgSolFr_first(ltt_valid_solutions);
|
|
do {
|
|
slots = TgAnsFr_free_slot(valid_answers);
|
|
do {
|
|
ans_node = TgAnsFr_answer(valid_answers, --slots);
|
|
#if defined(TABLE_LOCK_AT_ENTRY_LEVEL)
|
|
LOCK(SgFr_lock(sg_fr));
|
|
#elif defined(TABLE_LOCK_AT_NODE_LEVEL)
|
|
LOCK(TrNode_lock(ans_node));
|
|
#elif defined(TABLE_LOCK_AT_WRITE_LEVEL)
|
|
LOCK_TABLE(ans_node);
|
|
#endif /* TABLE_LOCK_LEVEL */
|
|
if (! IS_ANSWER_LEAF_NODE(ans_node)) {
|
|
TAG_AS_ANSWER_LEAF_NODE(ans_node);
|
|
if (first_answer == NULL)
|
|
first_answer = ans_node;
|
|
else
|
|
TrNode_child(last_answer) = ans_node;
|
|
last_answer = ans_node;
|
|
}
|
|
#if defined(TABLE_LOCK_AT_ENTRY_LEVEL)
|
|
UNLOCK(SgFr_lock(sg_fr));
|
|
#elif defined(TABLE_LOCK_AT_NODE_LEVEL)
|
|
UNLOCK(TrNode_lock(ans_node));
|
|
#elif defined(TABLE_LOCK_AT_WRITE_LEVEL)
|
|
UNLOCK_TABLE(ans_node);
|
|
#endif /* TABLE_LOCK_LEVEL */
|
|
} while (slots);
|
|
free_answer = valid_answers;
|
|
valid_answers = TgAnsFr_next(valid_answers);
|
|
FREE_TG_ANSWER_FRAME(free_answer);
|
|
} while (valid_answers);
|
|
free_solution = ltt_valid_solutions;
|
|
ltt_valid_solutions = TgSolFr_ltt_next(ltt_valid_solutions);
|
|
FREE_TG_SOLUTION_FRAME(free_solution);
|
|
} while (ltt_valid_solutions);
|
|
if (first_answer) {
|
|
LOCK(SgFr_lock(sg_fr));
|
|
if (SgFr_first_answer(sg_fr) == NULL) {
|
|
SgFr_first_answer(sg_fr) = first_answer;
|
|
} else {
|
|
TrNode_child(SgFr_last_answer(sg_fr)) = first_answer;
|
|
}
|
|
SgFr_last_answer(sg_fr) = last_answer;
|
|
UNLOCK(SgFr_lock(sg_fr));
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
static inline void CUT_join_tg_solutions(tg_sol_fr_ptr *old_solution_ptr, tg_sol_fr_ptr new_solution) {
|
|
tg_sol_fr_ptr next_old_solution, next_new_solution;
|
|
choiceptr gen_cp;
|
|
|
|
do {
|
|
gen_cp = TgSolFr_gen_cp(new_solution);
|
|
while (*old_solution_ptr && YOUNGER_CP(gen_cp, TgSolFr_gen_cp(*old_solution_ptr))) {
|
|
old_solution_ptr = & TgSolFr_next(*old_solution_ptr);
|
|
}
|
|
if (*old_solution_ptr) {
|
|
next_old_solution = *old_solution_ptr;
|
|
*old_solution_ptr = new_solution;
|
|
CUT_join_solution_frame_tg_answers(new_solution);
|
|
if (gen_cp == TgSolFr_gen_cp(next_old_solution)) {
|
|
tg_sol_fr_ptr free_solution;
|
|
TgAnsFr_next(TgSolFr_last(new_solution)) = TgSolFr_first(next_old_solution);
|
|
TgSolFr_last(new_solution) = TgSolFr_last(next_old_solution);
|
|
free_solution = next_old_solution;
|
|
next_old_solution = TgSolFr_next(next_old_solution);
|
|
FREE_TG_SOLUTION_FRAME(free_solution);
|
|
if (! next_old_solution) {
|
|
if ((next_new_solution = TgSolFr_next(new_solution))) {
|
|
CUT_join_solution_frames_tg_answers(next_new_solution);
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
gen_cp = TgSolFr_gen_cp(next_old_solution);
|
|
next_new_solution = TgSolFr_next(new_solution);
|
|
while (next_new_solution && YOUNGER_CP(gen_cp, TgSolFr_gen_cp(next_new_solution))) {
|
|
new_solution = next_new_solution;
|
|
next_new_solution = TgSolFr_next(new_solution);
|
|
CUT_join_solution_frame_tg_answers(new_solution);
|
|
}
|
|
old_solution_ptr = & TgSolFr_next(new_solution);
|
|
TgSolFr_next(new_solution) = next_old_solution;
|
|
new_solution = next_new_solution;
|
|
} else {
|
|
*old_solution_ptr = new_solution;
|
|
CUT_join_solution_frames_tg_answers(new_solution);
|
|
return;
|
|
}
|
|
} while (new_solution);
|
|
return;
|
|
}
|
|
|
|
|
|
static inline void CUT_join_solution_frame_tg_answers(tg_sol_fr_ptr join_solution) {
|
|
tg_sol_fr_ptr next_solution;
|
|
|
|
while ((next_solution = TgSolFr_ltt_next(join_solution))) {
|
|
TgAnsFr_next(TgSolFr_last(join_solution)) = TgSolFr_first(next_solution);
|
|
TgSolFr_last(join_solution) = TgSolFr_last(next_solution);
|
|
TgSolFr_ltt_next(join_solution) = TgSolFr_ltt_next(next_solution);
|
|
FREE_TG_SOLUTION_FRAME(next_solution);
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
static inline void CUT_join_solution_frames_tg_answers(tg_sol_fr_ptr join_solution) {
|
|
do {
|
|
CUT_join_solution_frame_tg_answers(join_solution);
|
|
join_solution = TgSolFr_next(join_solution);
|
|
} while (join_solution);
|
|
return;
|
|
}
|
|
|
|
|
|
static inline void CUT_free_tg_solution_frame(tg_sol_fr_ptr solution) {
|
|
tg_ans_fr_ptr current_answer, next_answer;
|
|
|
|
current_answer = TgSolFr_first(solution);
|
|
do {
|
|
next_answer = TgAnsFr_next(current_answer);
|
|
FREE_TG_ANSWER_FRAME(current_answer);
|
|
current_answer = next_answer;
|
|
} while (current_answer);
|
|
FREE_TG_SOLUTION_FRAME(solution);
|
|
return;
|
|
}
|
|
|
|
|
|
static inline void CUT_free_tg_solution_frames(tg_sol_fr_ptr current_solution) {
|
|
tg_sol_fr_ptr ltt_solution, next_solution;
|
|
|
|
while (current_solution) {
|
|
ltt_solution = TgSolFr_ltt_next(current_solution);
|
|
while (ltt_solution) {
|
|
next_solution = TgSolFr_ltt_next(ltt_solution);
|
|
CUT_free_tg_solution_frame(ltt_solution);
|
|
ltt_solution = next_solution;
|
|
}
|
|
next_solution = TgSolFr_next(current_solution);
|
|
CUT_free_tg_solution_frame(current_solution);
|
|
current_solution = next_solution;
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
static inline tg_sol_fr_ptr CUT_prune_tg_solution_frames(tg_sol_fr_ptr solutions, int ltt) {
|
|
tg_sol_fr_ptr ltt_next_solution, return_solution;
|
|
|
|
if (! solutions) return NULL;
|
|
return_solution = CUT_prune_tg_solution_frames(TgSolFr_next(solutions), ltt);
|
|
while (solutions && ltt > TgSolFr_ltt(solutions)) {
|
|
ltt_next_solution = TgSolFr_ltt_next(solutions);
|
|
CUT_free_tg_solution_frame(solutions);
|
|
solutions = ltt_next_solution;
|
|
}
|
|
if (solutions) {
|
|
TgSolFr_next(solutions) = return_solution;
|
|
return solutions;
|
|
} else {
|
|
return return_solution;
|
|
}
|
|
}
|
|
#endif /* TABLING_INNER_CUTS */
|