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extra built-in predicate for frozen choice point support

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This commit is contained in:
Ricardo Rocha 2010-05-18 17:34:52 +01:00
parent 9f97085640
commit 4df6ed1394
2 changed files with 41 additions and 25 deletions
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39
OPTYap/opt.preds.c
View File

@ -37,7 +37,9 @@
#ifdef TABLING
static Int p_freeze_choice_point(void);
static Int p_wake_choice_point(void);
static Int p_abolish_all_frozen_choice_points(void);
static Int p_reset_frozen_choice_points(void);
static Int p_abolish_frozen_choice_points_until(void);
static Int p_abolish_frozen_choice_points_all(void);
static Int p_table(void);
static Int p_tabling_mode(void);
static Int p_abolish_table(void);
@ -122,7 +124,8 @@ void Yap_init_optyap_preds(void) {
#ifdef TABLING
Yap_InitCPred("freeze_choice_point", 1, p_freeze_choice_point, SafePredFlag|SyncPredFlag);
Yap_InitCPred("wake_choice_point", 1, p_wake_choice_point, SafePredFlag|SyncPredFlag);
Yap_InitCPred("abolish_all_frozen_choice_points", 0, p_abolish_all_frozen_choice_points, SafePredFlag|SyncPredFlag);
Yap_InitCPred("abolish_frozen_choice_points", 1, p_abolish_frozen_choice_points_until, SafePredFlag|SyncPredFlag);
Yap_InitCPred("abolish_frozen_choice_points", 0, p_abolish_frozen_choice_points_all, SafePredFlag|SyncPredFlag);
Yap_InitCPred("$c_table", 2, p_table, SafePredFlag|SyncPredFlag|HiddenPredFlag);
Yap_InitCPred("$c_tabling_mode", 3, p_tabling_mode, SafePredFlag|SyncPredFlag|HiddenPredFlag);
Yap_InitCPred("$c_abolish_table", 2, p_abolish_table, SafePredFlag|SyncPredFlag|HiddenPredFlag);
@ -170,32 +173,32 @@ void finish_yapor(void) {
#ifdef TABLING
static Int p_freeze_choice_point(void) {
Term term_arg, term_cp;
term_arg = Deref(ARG1);
if (IsVarTerm(term_arg)) {
choiceptr cp = freeze_current_cp();
term_cp = MkIntegerTerm((Int) cp);
return Yap_unify(ARG1, term_cp);
if (IsVarTerm(Deref(ARG1))) {
Int offset = freeze_current_cp();
return Yap_unify(ARG1, MkIntegerTerm(offset));
}
return (FALSE);
}
static Int p_wake_choice_point(void) {
Term term_arg;
term_arg = Deref(ARG1);
if (IsIntegerTerm(term_arg)) {
choiceptr cp = (choiceptr) IntegerOfTerm(term_arg);
resume_frozen_cp(cp);
}
Term term_offset = Deref(ARG1);
if (IsIntegerTerm(term_offset))
wake_frozen_cp(IntegerOfTerm(term_offset));
return (FALSE);
}
static Int p_abolish_all_frozen_choice_points(void) {
abolish_all_frozen_cps();
static Int p_abolish_frozen_choice_points_until(void) {
Term term_offset = Deref(ARG1);
if (IsIntegerTerm(term_offset))
abolish_frozen_cps_until(IntegerOfTerm(term_offset));
return (TRUE);
}
static Int p_abolish_frozen_choice_points_all(void) {
abolish_frozen_cps_all();
return (TRUE);
}

27
OPTYap/tab.macros.h Executable file → Normal file
View File

@ -21,9 +21,10 @@
#endif /* HAVE_STRING_H */
#include "opt.mavar.h"
static inline choiceptr freeze_current_cp(void);
static inline void resume_frozen_cp(choiceptr);
static inline void abolish_all_frozen_cps(void);
static inline Int freeze_current_cp(void);
static inline void wake_frozen_cp(Int);
static inline void abolish_frozen_cps_until(Int);
static inline void abolish_frozen_cps_all(void);
static inline void adjust_freeze_registers(void);
static inline void mark_as_completed(sg_fr_ptr);
static inline void unbind_variables(tr_fr_ptr, tr_fr_ptr);
@ -421,7 +422,7 @@ static inline tg_sol_fr_ptr CUT_prune_tg_solution_frames(tg_sol_fr_ptr, int);
** Inline funcions **
******************************/
static inline choiceptr freeze_current_cp(void) {
static inline Int freeze_current_cp(void) {
choiceptr freeze_cp = B;
B_FZ = freeze_cp;
@ -429,11 +430,13 @@ static inline choiceptr freeze_current_cp(void) {
TR_FZ = freeze_cp->cp_tr;
B = B->cp_b;
HB = B->cp_h;
return freeze_cp;
return (Yap_LocalBase - (ADDR)freeze_cp);
}
static inline void resume_frozen_cp(choiceptr frozen_cp) {
static inline void wake_frozen_cp(Int frozen_offset) {
choiceptr frozen_cp = (choiceptr)(Yap_LocalBase - frozen_offset);
restore_bindings(TR, frozen_cp->cp_tr);
B = frozen_cp;
TR = TR_FZ;
@ -442,7 +445,17 @@ static inline void resume_frozen_cp(choiceptr frozen_cp) {
}
static inline void abolish_all_frozen_cps(void) {
static inline void abolish_frozen_cps_until(Int frozen_offset) {
choiceptr frozen_cp = (choiceptr)(Yap_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) {
B_FZ = (choiceptr) Yap_LocalBase;
H_FZ = (CELL *) Yap_GlobalBase;
TR_FZ = (tr_fr_ptr) Yap_TrailBase;