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yap-6.3/H/clause.h
vsc fd1bc58cde slowly restore nth_clause
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@941 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
2003-12-01 19:22:01 +00:00

232 lines
7.2 KiB
C

/*************************************************************************
* *
* YAP Prolog %W% %G% *
* *
* Yap Prolog was developed at NCCUP - Universidade do Porto *
* *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
* *
**************************************************************************
* *
* File: clause.h *
* Last rev: *
* mods: *
* comments: clause info *
* *
*************************************************************************/
#include "Yatom.h"
#include "Heap.h"
/* consulting files */
typedef union CONSULT_OBJ {
char *filename;
int mode;
Prop p;
UInt c;
} consult_obj;
/* Either we are assembling clauses or indexing code */
#define ASSEMBLING_CLAUSE 0
#define ASSEMBLING_INDEX 1
#define NextDynamicClause(X) (((yamop *)X)->u.ld.d)
#define PredFirstClause 0
#define PredMiddleClause 1
#define PredLastClause 2
typedef struct logic_upd_index {
CELL ClFlags;
UInt ClRefCount;
#if defined(YAPOR) || defined(THREADS)
/* A lock for manipulating the clause */
lockvar ClLock;
#endif
union {
PredEntry *pred;
struct logic_upd_index *ParentIndex;
} u;
struct logic_upd_index *SiblingIndex;
struct logic_upd_index *ChildIndex;
/* The instructions, at least one of the form sl */
yamop ClCode[MIN_ARRAY];
} LogUpdIndex;
typedef struct logic_upd_clause {
Functor Id; /* allow pointers to this struct to id */
/* as dbref */
/* A set of flags describing info on the clause */
/* A set of flags describing info on the clause */
CELL ClFlags;
#if defined(YAPOR) || defined(THREADS)
/* A lock for manipulating the clause */
lockvar ClLock;
#endif
/* extra clause information for logical update indices and facts */
/* indices that may still backtrack to this clause */
UInt ClRefCount;
/* data for clauses with environments */
yamop *ClExt;
DBTerm *ClSource;
/* doubly linked list of clauses */
struct logic_upd_clause *ClPrev, *ClNext;
/* parent pointer */
PredEntry *ClPred;
/* The instructions, at least one of the form sl */
yamop ClCode[MIN_ARRAY];
} LogUpdClause;
typedef struct dynamic_clause {
/* A set of flags describing info on the clause */
CELL ClFlags;
#if defined(YAPOR) || defined(THREADS)
/* A lock for manipulating the clause */
lockvar ClLock;
#endif
UInt ClRefCount;
yamop *ClPrevious; /* immediate update clause */
/* The instructions, at least one of the form sl */
yamop ClCode[MIN_ARRAY];
} DynamicClause;
typedef struct static_index {
/* A set of flags describing info on the clause */
CELL ClFlags;
struct static_index *SiblingIndex;
struct static_index *ChildIndex;
/* The instructions, at least one of the form sl */
yamop ClCode[MIN_ARRAY];
} StaticIndex;
typedef struct static_clause {
/* A set of flags describing info on the clause */
Functor Id;
CELL ClFlags;
union {
DBTerm *ClSource;
PredEntry *ClPred;
} usc;
struct static_clause *ClNext;
/* The instructions, at least one of the form sl */
yamop ClCode[MIN_ARRAY];
} StaticClause;
typedef struct dead_clause {
CELL ClFlags;
struct dead_clause *NextCl; /* dead clause */
#if defined(YAPOR) || defined(THREADS)
/* A lock for manipulating the clause */
lockvar ClLock;
UInt ref_count;
#endif
} DeadClause;
typedef union clause_obj {
struct logic_upd_clause luc;
struct logic_upd_index lui;
struct dynamic_clause ic;
struct static_clause sc;
struct static_index si;
} ClauseUnion;
#define ClauseCodeToDynamicClause(p) ((DynamicClause *)((CODEADDR)(p)-(CELL)(((DynamicClause *)NULL)->ClCode)))
#define ClauseCodeToStaticClause(p) ((StaticClause *)((CODEADDR)(p)-(CELL)(((StaticClause *)NULL)->ClCode)))
#define ClauseCodeToLogUpdClause(p) ((LogUpdClause *)((CODEADDR)(p)-(CELL)(((LogUpdClause *)NULL)->ClCode)))
#define ClauseCodeToLogUpdIndex(p) ((LogUpdIndex *)((CODEADDR)(p)-(CELL)(((LogUpdIndex *)NULL)->ClCode)))
#define ClauseCodeToStaticIndex(p) ((StaticIndex *)((CODEADDR)(p)-(CELL)(((StaticIndex *)NULL)->ClCode)))
#define ClauseFlagsToDynamicClause(p) ((DynamicClause *)(p))
#define ClauseFlagsToLogUpdClause(p) ((LogUpdClause *)((CODEADDR)(p)-(CELL)(&(((LogUpdClause *)NULL)->ClFlags))))
#define ClauseFlagsToLogUpdIndex(p) ((LogUpdIndex *)((CODEADDR)(p)-(CELL)(&(((LogUpdIndex *)NULL)->ClFlags))))
#define ClauseFlagsToStaticClause(p) ((StaticClause *)(p))
#define DynamicFlags(X) (ClauseCodeToDynamicClause(X)->ClFlags)
#define DynamicLock(X) (ClauseCodeToDynamicClause(X)->ClLock)
#if defined(YAPOR) || defined(THREADS)
#define INIT_CLREF_COUNT(X) (X)->ClRefCount = 0
#define INC_CLREF_COUNT(X) (X)->ClRefCount++
#define DEC_CLREF_COUNT(X) (X)->ClRefCount--
#define CL_IN_USE(X) ((X)->ClRefCount != 0)
#else
#define INIT_CLREF_COUNT(X)
#define INC_CLREF_COUNT(X)
#define DEC_CLREF_COUNT(X)
#define CL_IN_USE(X) ((X)->ClFlags & InUseMask || (X)->ClRefCount)
#endif
/* amasm.c */
wamreg STD_PROTO(Yap_emit_x,(CELL));
wamreg STD_PROTO(Yap_compile_cmp_flags,(PredEntry *));
void STD_PROTO(Yap_InitComma,(void));
/* cdmgr.c */
void STD_PROTO(Yap_RemoveLogUpdIndex,(LogUpdIndex *));
void STD_PROTO(Yap_IPred,(PredEntry *));
void STD_PROTO(Yap_addclause,(Term,yamop *,int,int));
void STD_PROTO(Yap_add_logupd_clause,(PredEntry *,LogUpdClause *,int));
void STD_PROTO(Yap_kill_iblock,(ClauseUnion *,ClauseUnion *,PredEntry *));
void STD_PROTO(Yap_cleanup_dangling_indices,(yamop *,yamop *,yamop *,yamop *));
void STD_PROTO(Yap_EraseStaticClause,(StaticClause *, SMALLUNSGN));
ClauseUnion *STD_PROTO(Yap_find_owner_index,(yamop *, PredEntry *));
/* dbase.c */
void STD_PROTO(Yap_ErCl,(DynamicClause *));
void STD_PROTO(Yap_ErLogUpdCl,(LogUpdClause *));
void STD_PROTO(Yap_ErLogUpdIndex,(LogUpdIndex *));
/* exec.c */
Term STD_PROTO(Yap_cp_as_integer,(choiceptr));
/* index.c */
yamop *STD_PROTO(Yap_PredIsIndexable,(PredEntry *));
yamop *STD_PROTO(Yap_ExpandIndex,(PredEntry *));
yamop *STD_PROTO(Yap_CleanUpIndex,(struct logic_upd_index *));
void STD_PROTO(Yap_AddClauseToIndex,(PredEntry *,yamop *,int));
void STD_PROTO(Yap_RemoveClauseFromIndex,(PredEntry *,yamop *));
LogUpdClause *STD_PROTO(Yap_NthClause,(PredEntry *,Int));
LogUpdClause *STD_PROTO(Yap_FollowIndexingCode,(PredEntry *,yamop *,Term,Term,Term, yamop *,yamop *));
#if LOW_PROF
/* profiling */
yamop *Yap_prof_end;
#endif /* LOW_PROF */
#if USE_THREADED_CODE
#define OP_HASH_SIZE 2048
static inline int
rtable_hash_op(OPCODE opc, int hash_mask) {
return((((CELL)opc) >> 3) & hash_mask);
}
/* given an opcode find the corresponding opnumber. This should make
switches on ops a much easier operation */
static inline op_numbers
Yap_op_from_opcode(OPCODE opc)
{
int j = rtable_hash_op(opc,OP_HASH_SIZE-1);
while (OP_RTABLE[j].opc != opc) {
if (j == OP_HASH_SIZE-1) {
j = 0;
} else {
j++;
}
}
return OP_RTABLE[j].opnum;
}
#else
static inline op_numbers
Yap_op_from_opcode(OPCODE opc)
{
return((op_numbers)opc);
}
#endif /* USE_THREADED_CODE */