720 lines
25 KiB
C
720 lines
25 KiB
C
/************************************************************************
|
|
** **
|
|
** 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 **
|
|
** ------------------ */
|
|
|
|
#include "Yap.h"
|
|
#ifdef YAPOR_COPY
|
|
#ifdef HAVE_STRING_H
|
|
#include <string.h>
|
|
#endif /* HAVE_STRING_H */
|
|
#include "Yatom.h"
|
|
#include "YapHeap.h"
|
|
#include "or.macros.h"
|
|
#ifdef TABLING
|
|
#include "tab.macros.h"
|
|
#else
|
|
#include "opt.mavar.h"
|
|
#endif /* TABLING */
|
|
|
|
|
|
|
|
/* ------------------------------------- **
|
|
** Local functions declaration **
|
|
** ------------------------------------- */
|
|
|
|
static void share_private_nodes(int worker_q);
|
|
|
|
|
|
|
|
/* ---------------------- **
|
|
** Local macros **
|
|
** ---------------------- */
|
|
|
|
#define INCREMENTAL_COPY 1
|
|
#if INCREMENTAL_COPY
|
|
#define COMPUTE_SEGMENTS_TO_COPY_TO(Q) \
|
|
if (REMOTE_top_cp(Q) == GLOBAL_root_cp) \
|
|
REMOTE_start_global_copy(Q) = (CELL) (H0); \
|
|
else \
|
|
REMOTE_start_global_copy(Q) = (CELL) (REMOTE_top_cp(Q)->cp_h); \
|
|
REMOTE_end_global_copy(Q) = (CELL) (B->cp_h); \
|
|
REMOTE_start_local_copy(Q) = (CELL) (B); \
|
|
REMOTE_end_local_copy(Q) = (CELL) (REMOTE_top_cp(Q)); \
|
|
REMOTE_start_trail_copy(Q) = (CELL) (REMOTE_top_cp(Q)->cp_tr); \
|
|
REMOTE_end_trail_copy(Q) = (CELL) (TR)
|
|
#else
|
|
#define COMPUTE_SEGMENTS_TO_COPY_TO(Q) \
|
|
REMOTE_start_global_copy(Q) = (CELL) (H0); \
|
|
REMOTE_end_global_copy(Q) = (CELL) (HR); \
|
|
REMOTE_start_local_copy(Q) = (CELL) (B); \
|
|
REMOTE_end_local_copy(Q) = (CELL) (GLOBAL_root_cp); \
|
|
REMOTE_start_trail_copy(Q) = (CELL) (GLOBAL_root_cp->cp_tr); \
|
|
REMOTE_end_trail_copy(Q) = (CELL) (TR)
|
|
#endif
|
|
|
|
#define P_COPY_GLOBAL_TO(Q) \
|
|
memmove((void *) (worker_offset(Q) + REMOTE_start_global_copy(Q)), \
|
|
(void *) REMOTE_start_global_copy(Q), \
|
|
(size_t) (REMOTE_end_global_copy(Q) - REMOTE_start_global_copy(Q)))
|
|
#define Q_COPY_GLOBAL_FROM(P) \
|
|
memmove((void *) LOCAL_start_global_copy, \
|
|
(void *) (worker_offset(P) + LOCAL_start_global_copy), \
|
|
(size_t) (LOCAL_end_global_copy - LOCAL_start_global_copy))
|
|
|
|
#define P_COPY_LOCAL_TO(Q) \
|
|
memmove((void *) (worker_offset(Q) + REMOTE_start_local_copy(Q)), \
|
|
(void *) REMOTE_start_local_copy(Q), \
|
|
(size_t) (REMOTE_end_local_copy(Q) - REMOTE_start_local_copy(Q)))
|
|
#define Q_COPY_LOCAL_FROM(P) \
|
|
memmove((void *) LOCAL_start_local_copy, \
|
|
(void *) (worker_offset(P) + LOCAL_start_local_copy), \
|
|
(size_t) (LOCAL_end_local_copy - LOCAL_start_local_copy))
|
|
|
|
#define P_COPY_TRAIL_TO(Q) \
|
|
memmove((void *) (worker_offset(Q) + REMOTE_start_trail_copy(Q)), \
|
|
(void *) REMOTE_start_trail_copy(Q), \
|
|
(size_t) (REMOTE_end_trail_copy(Q) - REMOTE_start_trail_copy(Q)))
|
|
#define Q_COPY_TRAIL_FROM(P) \
|
|
memmove((void *) LOCAL_start_trail_copy, \
|
|
(void *) (worker_offset(P) + LOCAL_start_trail_copy), \
|
|
(size_t) (LOCAL_end_trail_copy - LOCAL_start_trail_copy))
|
|
|
|
|
|
|
|
/* -------------------------- **
|
|
** Global functions **
|
|
** -------------------------- */
|
|
|
|
void make_root_choice_point(void) {
|
|
if (worker_id == 0) {
|
|
LOCAL_top_cp = GLOBAL_root_cp = OrFr_node(GLOBAL_root_or_fr) = B;
|
|
} else {
|
|
B = LOCAL_top_cp = GLOBAL_root_cp;
|
|
B->cp_tr = TR = ((choiceptr) (worker_offset(0) + (CELL)(B)))->cp_tr;
|
|
}
|
|
// B->cp_h = H0;
|
|
B->cp_ap = GETWORK;
|
|
B->cp_or_fr = GLOBAL_root_or_fr;
|
|
LOCAL_top_or_fr = GLOBAL_root_or_fr;
|
|
LOCAL_load = 0;
|
|
Set_LOCAL_prune_request(NULL);
|
|
BRANCH(worker_id, 0) = 0;
|
|
#ifdef TABLING_INNER_CUTS
|
|
LOCAL_pruning_scope = NULL;
|
|
#endif /* TABLING_INNER_CUTS */
|
|
#ifdef TABLING
|
|
LOCAL_top_cp_on_stack = LOCAL_top_cp;
|
|
adjust_freeze_registers();
|
|
#endif /* TABLING */
|
|
return;
|
|
}
|
|
|
|
|
|
void free_root_choice_point(void) {
|
|
B = LOCAL_top_cp->cp_b;
|
|
#ifdef TABLING
|
|
LOCAL_top_cp_on_stack =
|
|
#endif /* TABLING */
|
|
LOCAL_top_cp = GLOBAL_root_cp = OrFr_node(GLOBAL_root_or_fr) = (choiceptr) LOCAL_LocalBase;
|
|
return;
|
|
}
|
|
|
|
|
|
int p_share_work(void) {
|
|
int worker_q = LOCAL_share_request;
|
|
|
|
if (! BITMAP_member(OrFr_members(REMOTE_top_or_fr(worker_q)), worker_id) ||
|
|
B == REMOTE_top_cp(worker_q) ||
|
|
(LOCAL_load <= GLOBAL_delayed_release_load && OrFr_nearest_livenode(LOCAL_top_or_fr) == NULL)) {
|
|
/* refuse sharing request */
|
|
REMOTE_reply_signal(LOCAL_share_request) = no_sharing;
|
|
LOCAL_share_request = MAX_WORKERS;
|
|
PUT_OUT_REQUESTABLE(worker_id);
|
|
return 0;
|
|
}
|
|
/* sharing request accepted */
|
|
COMPUTE_SEGMENTS_TO_COPY_TO(worker_q);
|
|
REMOTE_q_fase_signal(worker_q) = Q_idle;
|
|
REMOTE_p_fase_signal(worker_q) = P_idle;
|
|
#ifndef TABLING
|
|
/* wait for incomplete installations */
|
|
while (LOCAL_reply_signal != worker_ready);
|
|
#endif /* TABLING */
|
|
LOCAL_reply_signal = sharing;
|
|
REMOTE_reply_signal(worker_q) = sharing;
|
|
share_private_nodes(worker_q);
|
|
if(Get_LOCAL_prune_request())
|
|
CUT_send_prune_request(worker_q, Get_LOCAL_prune_request());
|
|
REMOTE_reply_signal(worker_q) = nodes_shared;
|
|
/* copy local stack ? */
|
|
LOCK(REMOTE_lock_signals(worker_q));
|
|
if (REMOTE_q_fase_signal(worker_q) < local) {
|
|
REMOTE_p_fase_signal(worker_q) = local;
|
|
UNLOCK(REMOTE_lock_signals(worker_q));
|
|
P_COPY_LOCAL_TO(worker_q);
|
|
} else {
|
|
UNLOCK(REMOTE_lock_signals(worker_q));
|
|
goto sync_with_q;
|
|
}
|
|
/* copy global stack ? */
|
|
LOCK(REMOTE_lock_signals(worker_q));
|
|
if (REMOTE_q_fase_signal(worker_q) < global) {
|
|
REMOTE_p_fase_signal(worker_q) = global;
|
|
UNLOCK(REMOTE_lock_signals(worker_q));
|
|
P_COPY_GLOBAL_TO(worker_q);
|
|
} else {
|
|
UNLOCK(REMOTE_lock_signals(worker_q));
|
|
goto sync_with_q;
|
|
}
|
|
/* copy trail stack ? */
|
|
LOCK(REMOTE_lock_signals(worker_q));
|
|
if (REMOTE_q_fase_signal(worker_q) < trail) {
|
|
REMOTE_p_fase_signal(worker_q) = trail;
|
|
UNLOCK(REMOTE_lock_signals(worker_q));
|
|
P_COPY_TRAIL_TO(worker_q);
|
|
} else UNLOCK(REMOTE_lock_signals(worker_q));
|
|
|
|
sync_with_q:
|
|
REMOTE_reply_signal(worker_q) = copy_done;
|
|
while (LOCAL_reply_signal == sharing);
|
|
while (REMOTE_reply_signal(worker_q) != worker_ready);
|
|
LOCAL_share_request = MAX_WORKERS;
|
|
PUT_IN_REQUESTABLE(worker_id);
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
int q_share_work(int worker_p) {
|
|
register tr_fr_ptr aux_tr;
|
|
register CELL aux_cell;
|
|
|
|
LOCK_OR_FRAME(LOCAL_top_or_fr);
|
|
if (REMOTE_prune_request(worker_p)) {
|
|
/* worker p with prune request */
|
|
UNLOCK_OR_FRAME(LOCAL_top_or_fr);
|
|
return FALSE;
|
|
}
|
|
YAPOR_ERROR_CHECKING(q_share_work, Get_OrFr_pend_prune_cp(LOCAL_top_or_fr) && BRANCH_LTT(worker_p, OrFr_depth(LOCAL_top_or_fr)) < OrFr_pend_prune_ltt(LOCAL_top_or_fr));
|
|
/* there is no pending prune with worker p at right --> safe move to worker p branch */
|
|
CUT_reset_prune_request();
|
|
if(Get_LOCAL_prune_request()){
|
|
UNLOCK_OR_FRAME(LOCAL_top_or_fr);
|
|
return FALSE;
|
|
}
|
|
BRANCH(worker_id, OrFr_depth(LOCAL_top_or_fr)) = BRANCH(worker_p, OrFr_depth(LOCAL_top_or_fr));
|
|
UNLOCK_OR_FRAME(LOCAL_top_or_fr);
|
|
|
|
/* unbind variables */
|
|
aux_tr = LOCAL_top_cp->cp_tr;
|
|
TABLING_ERROR_CHECKING(q_share_work, TR < aux_tr);
|
|
while (aux_tr != TR) {
|
|
aux_cell = TrailTerm(--TR);
|
|
/* check for global or local variables */
|
|
if (IsVarTerm(aux_cell)) {
|
|
RESET_VARIABLE(aux_cell);
|
|
#ifdef TABLING
|
|
} else if (IsPairTerm(aux_cell)) {
|
|
aux_cell = (CELL) RepPair(aux_cell);
|
|
if (IN_BETWEEN(LOCAL_TrailBase, aux_cell, LOCAL_TrailTop)) {
|
|
/* avoid frozen segments */
|
|
TR = (tr_fr_ptr) aux_cell;
|
|
TABLING_ERROR_CHECKING(q_share_work, TR > (tr_fr_ptr) LOCAL_TrailTop);
|
|
TABLING_ERROR_CHECKING(q_share_work, TR < aux_tr);
|
|
}
|
|
#endif /* TABLING */
|
|
#ifdef MULTI_ASSIGNMENT_VARIABLES
|
|
} else if (IsApplTerm(aux_cell)) {
|
|
CELL *aux_ptr = RepAppl(aux_cell);
|
|
Term aux_val = TrailTerm(--aux_tr);
|
|
*aux_ptr = aux_val;
|
|
#endif /* MULTI_ASSIGNMENT_VARIABLES */
|
|
}
|
|
}
|
|
|
|
OPTYAP_ERROR_CHECKING(q_share_work, LOCAL_top_cp != LOCAL_top_cp_on_stack);
|
|
OPTYAP_ERROR_CHECKING(q_share_work, YOUNGER_CP(B_FZ, LOCAL_top_cp));
|
|
YAPOR_ERROR_CHECKING(q_share_work, LOCAL_reply_signal != worker_ready);
|
|
|
|
/* make sharing request */
|
|
LOCK_WORKER(worker_p);
|
|
if (BITMAP_member(GLOBAL_bm_idle_workers, worker_p) ||
|
|
REMOTE_share_request(worker_p) != MAX_WORKERS) {
|
|
/* worker p is idle or has another request */
|
|
UNLOCK_WORKER(worker_p);
|
|
return FALSE;
|
|
}
|
|
REMOTE_share_request(worker_p) = worker_id;
|
|
UNLOCK_WORKER(worker_p);
|
|
|
|
/* wait for an answer */
|
|
while (LOCAL_reply_signal == worker_ready);
|
|
if (LOCAL_reply_signal == no_sharing) {
|
|
/* sharing request refused */
|
|
LOCAL_reply_signal = worker_ready;
|
|
return FALSE;
|
|
}
|
|
|
|
/* copy trail stack ? */
|
|
LOCK(LOCAL_lock_signals);
|
|
if (LOCAL_p_fase_signal > trail) {
|
|
LOCAL_q_fase_signal = trail;
|
|
UNLOCK(LOCAL_lock_signals);
|
|
Q_COPY_TRAIL_FROM(worker_p);
|
|
} else {
|
|
UNLOCK(LOCAL_lock_signals);
|
|
goto sync_with_p;
|
|
}
|
|
|
|
/* copy global stack ? */
|
|
LOCK(LOCAL_lock_signals);
|
|
if (LOCAL_p_fase_signal > global) {
|
|
LOCAL_q_fase_signal = global;
|
|
UNLOCK(LOCAL_lock_signals);
|
|
Q_COPY_GLOBAL_FROM(worker_p);
|
|
} else {
|
|
UNLOCK(LOCAL_lock_signals);
|
|
goto sync_with_p;
|
|
}
|
|
|
|
/* copy local stack ? */
|
|
while (LOCAL_reply_signal < nodes_shared);
|
|
LOCK(LOCAL_lock_signals);
|
|
if (LOCAL_p_fase_signal > local) {
|
|
LOCAL_q_fase_signal = local;
|
|
UNLOCK(LOCAL_lock_signals);
|
|
Q_COPY_LOCAL_FROM(worker_p);
|
|
} else UNLOCK(LOCAL_lock_signals);
|
|
|
|
sync_with_p:
|
|
#ifdef TABLING
|
|
REMOTE_reply_signal(worker_p) = worker_ready;
|
|
#else
|
|
REMOTE_reply_signal(worker_p) = copy_done;
|
|
#endif /* TABLING */
|
|
while (LOCAL_reply_signal != copy_done);
|
|
|
|
#if INCREMENTAL_COPY
|
|
/* install fase --> TR and LOCAL_top_cp->cp_tr are equal */
|
|
aux_tr = ((choiceptr) LOCAL_start_local_copy)->cp_tr;
|
|
TR = ((choiceptr) LOCAL_end_local_copy)->cp_tr;
|
|
Yap_NEW_MAHASH((ma_h_inner_struct *)HR);
|
|
while (TR != aux_tr) {
|
|
aux_cell = TrailTerm(--aux_tr);
|
|
if (IsVarTerm(aux_cell)) {
|
|
if (aux_cell < LOCAL_start_global_copy || EQUAL_OR_YOUNGER_CP((choiceptr)LOCAL_end_local_copy, (choiceptr)aux_cell)) {
|
|
YAPOR_ERROR_CHECKING(q_share_work, (CELL *)aux_cell < H0);
|
|
YAPOR_ERROR_CHECKING(q_share_work, (ADDR)aux_cell > LOCAL_LocalBase);
|
|
#ifdef TABLING
|
|
*((CELL *) aux_cell) = TrailVal(aux_tr);
|
|
#else
|
|
*((CELL *) aux_cell) = *((CELL *) (worker_offset(worker_p) + aux_cell));
|
|
#endif /* TABLING */
|
|
}
|
|
#ifdef TABLING
|
|
} else if (IsPairTerm(aux_cell)) {
|
|
aux_cell = (CELL) RepPair(aux_cell);
|
|
if (IN_BETWEEN(LOCAL_TrailBase, aux_cell, LOCAL_TrailTop)) {
|
|
/* avoid frozen segments */
|
|
aux_tr = (tr_fr_ptr) aux_cell;
|
|
}
|
|
#endif /* TABLING */
|
|
#ifdef MULTI_ASSIGNMENT_VARIABLES
|
|
} else if (IsApplTerm(aux_cell)) {
|
|
CELL *cell_ptr = RepAppl(aux_cell);
|
|
if (((CELL *)aux_cell < LOCAL_top_cp->cp_h ||
|
|
EQUAL_OR_YOUNGER_CP(LOCAL_top_cp, (choiceptr)aux_cell)) &&
|
|
!Yap_lookup_ma_var(cell_ptr)) {
|
|
/* first time we found the variable, let's put the new value */
|
|
#ifdef TABLING
|
|
*cell_ptr = TrailVal(aux_tr);
|
|
#else
|
|
*cell_ptr = *((CELL *) (worker_offset(worker_p) + (CELL)cell_ptr));
|
|
#endif /* TABLING */
|
|
}
|
|
/* skip the old value */
|
|
aux_tr--;
|
|
#endif /* MULTI_ASSIGNMENT_VARIABLES */
|
|
}
|
|
}
|
|
#endif /* incremental */
|
|
|
|
/* update registers and return */
|
|
PUT_OUT_ROOT_NODE(worker_id);
|
|
#ifndef TABLING
|
|
REMOTE_reply_signal(worker_p) = worker_ready;
|
|
#endif /* TABLING */
|
|
TR = (tr_fr_ptr) LOCAL_end_trail_copy;
|
|
LOCAL_reply_signal = worker_ready;
|
|
PUT_IN_REQUESTABLE(worker_id);
|
|
#ifdef TABLING
|
|
adjust_freeze_registers();
|
|
#endif /* TABLING */
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/* ------------------------- **
|
|
** Local functions **
|
|
** ------------------------- */
|
|
|
|
static
|
|
void share_private_nodes(int worker_q) {
|
|
choiceptr sharing_node = B;
|
|
|
|
#ifdef DEBUG_OPTYAP
|
|
OPTYAP_ERROR_CHECKING(share_private_nodes, YOUNGER_CP(LOCAL_top_cp, LOCAL_top_cp_on_stack));
|
|
{ choiceptr aux_cp = B;
|
|
while (aux_cp != LOCAL_top_cp) {
|
|
OPTYAP_ERROR_CHECKING(share_private_nodes, YOUNGER_CP(LOCAL_top_cp, aux_cp));
|
|
OPTYAP_ERROR_CHECKING(share_private_nodes, EQUAL_OR_YOUNGER_CP(LOCAL_top_cp_on_stack, aux_cp));
|
|
aux_cp = aux_cp->cp_b;
|
|
}
|
|
}
|
|
#endif /* DEBUG_OPTYAP */
|
|
|
|
#ifdef TABLING
|
|
/* check if the branch is already shared */
|
|
if (EQUAL_OR_YOUNGER_CP(LOCAL_top_cp_on_stack, sharing_node)) {
|
|
or_fr_ptr or_frame;
|
|
sg_fr_ptr sg_frame;
|
|
dep_fr_ptr dep_frame;
|
|
|
|
#ifdef DEBUG_OPTYAP
|
|
{ or_fr_ptr aux_or_fr;
|
|
aux_or_fr = LOCAL_top_or_fr;
|
|
while (aux_or_fr != REMOTE_top_or_fr(worker_q)) {
|
|
OPTYAP_ERROR_CHECKING(share_private_nodes, YOUNGER_CP(OrFr_node(REMOTE_top_or_fr(worker_q)), OrFr_node(aux_or_fr)));
|
|
aux_or_fr = OrFr_next_on_stack(aux_or_fr);
|
|
}
|
|
}
|
|
#endif /* DEBUG_OPTYAP */
|
|
|
|
/* update old shared nodes */
|
|
or_frame = LOCAL_top_or_fr;
|
|
while (or_frame != REMOTE_top_or_fr(worker_q)) {
|
|
LOCK_OR_FRAME(or_frame);
|
|
BRANCH(worker_q, OrFr_depth(or_frame)) = BRANCH(worker_id, OrFr_depth(or_frame));
|
|
OrFr_owners(or_frame)++;
|
|
if (BITMAP_member(OrFr_members(or_frame), worker_id))
|
|
BITMAP_insert(OrFr_members(or_frame), worker_q);
|
|
UNLOCK_OR_FRAME(or_frame);
|
|
or_frame = OrFr_next_on_stack(or_frame);
|
|
}
|
|
|
|
/* update worker Q top subgoal frame */
|
|
sg_frame = LOCAL_top_sg_fr;
|
|
while (sg_frame && YOUNGER_CP(SgFr_gen_cp(sg_frame), sharing_node)) {
|
|
sg_frame = SgFr_next(sg_frame);
|
|
}
|
|
REMOTE_top_sg_fr(worker_q) = sg_frame;
|
|
|
|
/* update worker Q top dependency frame */
|
|
dep_frame = LOCAL_top_dep_fr;
|
|
while (YOUNGER_CP(DepFr_cons_cp(dep_frame), sharing_node)) {
|
|
dep_frame = DepFr_next(dep_frame);
|
|
}
|
|
REMOTE_top_dep_fr(worker_q) = dep_frame;
|
|
|
|
/* update worker Q top shared nodes */
|
|
REMOTE_top_cp_on_stack(worker_q) = REMOTE_top_cp(worker_q) = LOCAL_top_cp;
|
|
REMOTE_top_or_fr(worker_q) = LOCAL_top_or_fr;
|
|
} else
|
|
#endif /* TABLING */
|
|
{
|
|
int depth;
|
|
bitmap bm_workers;
|
|
or_fr_ptr or_frame, previous_or_frame;
|
|
#ifdef TABLING
|
|
choiceptr consumer_cp, next_node_on_branch;
|
|
dep_fr_ptr dep_frame;
|
|
sg_fr_ptr sg_frame;
|
|
CELL *stack, *stack_limit;
|
|
|
|
/* find top dependency frame above current choice point */
|
|
dep_frame = LOCAL_top_dep_fr;
|
|
while (EQUAL_OR_YOUNGER_CP(DepFr_cons_cp(dep_frame), sharing_node)) {
|
|
dep_frame = DepFr_next(dep_frame);
|
|
}
|
|
/* initialize tabling auxiliary variables */
|
|
consumer_cp = DepFr_cons_cp(dep_frame);
|
|
next_node_on_branch = NULL;
|
|
stack_limit = (CELL *)TR;
|
|
stack = (CELL *)LOCAL_TrailTop;
|
|
#endif /* TABLING */
|
|
|
|
/* initialize auxiliary variables */
|
|
BITMAP_clear(bm_workers);
|
|
BITMAP_insert(bm_workers, worker_id);
|
|
BITMAP_insert(bm_workers, worker_q);
|
|
previous_or_frame = NULL;
|
|
depth = OrFr_depth(LOCAL_top_or_fr);
|
|
|
|
/* sharing loop */
|
|
#ifdef TABLING
|
|
while (YOUNGER_CP(sharing_node, LOCAL_top_cp_on_stack)) {
|
|
#else
|
|
while (sharing_node != LOCAL_top_cp) {
|
|
#endif /* TABLING */
|
|
|
|
#ifdef DEBUG_OPTYAP
|
|
if (next_node_on_branch) {
|
|
choiceptr aux_cp = B;
|
|
while (aux_cp != next_node_on_branch) {
|
|
OPTYAP_ERROR_CHECKING(share_private_nodes, sharing_node == aux_cp);
|
|
OPTYAP_ERROR_CHECKING(share_private_nodes, YOUNGER_CP(next_node_on_branch, aux_cp));
|
|
aux_cp = aux_cp->cp_b;
|
|
}
|
|
} else {
|
|
choiceptr aux_cp = B;
|
|
while (aux_cp != sharing_node) {
|
|
OPTYAP_ERROR_CHECKING(share_private_nodes, YOUNGER_CP(sharing_node, aux_cp));
|
|
aux_cp = aux_cp->cp_b;
|
|
}
|
|
}
|
|
#endif /* DEBUG_OPTYAP */
|
|
|
|
ALLOC_OR_FRAME(or_frame);
|
|
if (previous_or_frame) {
|
|
#ifdef TABLING
|
|
OrFr_next_on_stack(previous_or_frame) =
|
|
#endif /* TABLING */
|
|
OrFr_nearest_livenode(previous_or_frame) = OrFr_next(previous_or_frame) = or_frame;
|
|
}
|
|
previous_or_frame = or_frame;
|
|
depth++;
|
|
INIT_LOCK(OrFr_lock(or_frame));
|
|
OrFr_node(or_frame) = sharing_node;
|
|
OrFr_alternative(or_frame) = sharing_node->cp_ap;
|
|
OrFr_pend_prune_cp(or_frame) = NULL;
|
|
OrFr_nearest_leftnode(or_frame) = LOCAL_top_or_fr;
|
|
OrFr_qg_solutions(or_frame) = NULL;
|
|
#ifdef TABLING_INNER_CUTS
|
|
OrFr_tg_solutions(or_frame) = NULL;
|
|
#endif /* TABLING_INNER_CUTS */
|
|
#ifdef TABLING
|
|
OrFr_suspensions(or_frame) = NULL;
|
|
OrFr_nearest_suspnode(or_frame) = or_frame;
|
|
OrFr_owners(or_frame) = 2;
|
|
if (next_node_on_branch)
|
|
BITMAP_clear(OrFr_members(or_frame));
|
|
else
|
|
#endif /* TABLING */
|
|
OrFr_members(or_frame) = bm_workers;
|
|
|
|
YAPOR_ERROR_CHECKING(share_private_nodes, sharing_node->cp_ap == GETWORK || sharing_node->cp_ap == GETWORK_SEQ);
|
|
if (sharing_node->cp_ap && YAMOP_SEQ(sharing_node->cp_ap)) {
|
|
sharing_node->cp_ap = GETWORK_SEQ;
|
|
} else {
|
|
sharing_node->cp_ap = GETWORK;
|
|
}
|
|
sharing_node->cp_or_fr = or_frame;
|
|
sharing_node = sharing_node->cp_b;
|
|
|
|
#ifdef TABLING
|
|
/* when next_node_on_branch is not NULL the **
|
|
** sharing_node belongs to a frozen branch. */
|
|
if (YOUNGER_CP(consumer_cp, sharing_node)) {
|
|
/* frozen stack segment */
|
|
if (! next_node_on_branch)
|
|
next_node_on_branch = sharing_node;
|
|
STACK_PUSH_UP(or_frame, stack);
|
|
STACK_CHECK_EXPAND(stack, stack_limit);
|
|
STACK_PUSH_UP(sharing_node, stack);
|
|
STACK_CHECK_EXPAND(stack, stack_limit);
|
|
sharing_node = consumer_cp;
|
|
dep_frame = DepFr_next(dep_frame);
|
|
consumer_cp = DepFr_cons_cp(dep_frame);
|
|
} else if (consumer_cp == sharing_node) {
|
|
dep_frame = DepFr_next(dep_frame);
|
|
consumer_cp = DepFr_cons_cp(dep_frame);
|
|
}
|
|
if (next_node_on_branch == sharing_node)
|
|
next_node_on_branch = NULL;
|
|
#endif /* TABLING */
|
|
OPTYAP_ERROR_CHECKING(share_private_nodes, next_node_on_branch && YOUNGER_CP(next_node_on_branch, sharing_node));
|
|
}
|
|
|
|
/* initialize last or-frame pointer */
|
|
or_frame = sharing_node->cp_or_fr;
|
|
if (previous_or_frame) {
|
|
#ifdef TABLING
|
|
OrFr_next_on_stack(previous_or_frame) =
|
|
#endif /* TABLING */
|
|
OrFr_nearest_livenode(previous_or_frame) = OrFr_next(previous_or_frame) = or_frame;
|
|
}
|
|
|
|
#ifdef TABLING
|
|
/* update or-frames stored in auxiliary stack */
|
|
while (STACK_NOT_EMPTY(stack, (CELL *)LOCAL_TrailTop)) {
|
|
next_node_on_branch = (choiceptr) STACK_POP_DOWN(stack);
|
|
or_frame = (or_fr_ptr) STACK_POP_DOWN(stack);
|
|
OrFr_nearest_livenode(or_frame) = OrFr_next(or_frame) = next_node_on_branch->cp_or_fr;
|
|
}
|
|
#endif /* TABLING */
|
|
|
|
/* update depth */
|
|
if (depth >= MAX_BRANCH_DEPTH)
|
|
Yap_Error(SYSTEM_ERROR_INTERNAL, TermNil, "maximum depth exceded (share_private_nodes)");
|
|
or_frame = B->cp_or_fr;
|
|
#ifdef TABLING
|
|
previous_or_frame = LOCAL_top_cp_on_stack->cp_or_fr;
|
|
while (or_frame != previous_or_frame) {
|
|
#else
|
|
while (or_frame != LOCAL_top_or_fr) {
|
|
#endif /* TABLING */
|
|
unsigned int branch;
|
|
if (OrFr_alternative(or_frame)) {
|
|
branch = YAMOP_OR_ARG(OrFr_alternative(or_frame)) + 1;
|
|
} else {
|
|
branch = 1;
|
|
}
|
|
branch |= YAMOP_CUT_FLAG; /* in doubt, assume cut */
|
|
BRANCH(worker_id, depth) = BRANCH(worker_q, depth) = branch;
|
|
OrFr_depth(or_frame) = depth--;
|
|
or_frame = OrFr_next_on_stack(or_frame);
|
|
}
|
|
|
|
YAPOR_ERROR_CHECKING(share_private_nodes, depth != OrFr_depth(LOCAL_top_or_fr));
|
|
|
|
#ifdef DEBUG_OPTYAP
|
|
{ or_fr_ptr aux_or_fr = B->cp_or_fr;
|
|
choiceptr aux_cp;
|
|
while (aux_or_fr != LOCAL_top_cp_on_stack->cp_or_fr) {
|
|
aux_cp = OrFr_node(aux_or_fr);
|
|
OPTYAP_ERROR_CHECKING(share_private_nodes, OrFr_next(aux_or_fr) != aux_cp->cp_b->cp_or_fr);
|
|
OPTYAP_ERROR_CHECKING(share_private_nodes, OrFr_nearest_livenode(aux_or_fr) != aux_cp->cp_b->cp_or_fr);
|
|
aux_or_fr = OrFr_next_on_stack(aux_or_fr);
|
|
}
|
|
aux_or_fr = B->cp_or_fr;
|
|
while (aux_or_fr != LOCAL_top_cp_on_stack->cp_or_fr) {
|
|
or_fr_ptr nearest_leftnode = OrFr_nearest_leftnode(aux_or_fr);
|
|
aux_cp = OrFr_node(aux_or_fr);
|
|
while (OrFr_node(nearest_leftnode) != aux_cp) {
|
|
OPTYAP_ERROR_CHECKING(share_private_nodes, YOUNGER_CP(OrFr_node(nearest_leftnode), aux_cp));
|
|
aux_cp = aux_cp->cp_b;
|
|
}
|
|
aux_or_fr = OrFr_next_on_stack(aux_or_fr);
|
|
}
|
|
}
|
|
#endif /* DEBUG_OPTYAP */
|
|
|
|
/* update old shared nodes */
|
|
while (or_frame != REMOTE_top_or_fr(worker_q)) {
|
|
LOCK_OR_FRAME(or_frame);
|
|
BRANCH(worker_q, OrFr_depth(or_frame)) = BRANCH(worker_id, OrFr_depth(or_frame));
|
|
#ifdef TABLING
|
|
OrFr_owners(or_frame)++;
|
|
if (BITMAP_member(OrFr_members(or_frame), worker_id))
|
|
#endif /* TABLING */
|
|
BITMAP_insert(OrFr_members(or_frame), worker_q);
|
|
UNLOCK_OR_FRAME(or_frame);
|
|
or_frame = OrFr_next_on_stack(or_frame);
|
|
}
|
|
|
|
LOCK_OR_FRAME(REMOTE_top_or_fr(worker_q));
|
|
or_fr_ptr old_top = REMOTE_top_or_fr(worker_q);
|
|
Set_REMOTE_top_cp(worker_q,B);
|
|
Set_LOCAL_top_cp(B);
|
|
REMOTE_top_or_fr(worker_q) = LOCAL_top_or_fr = Get_LOCAL_top_cp()->cp_or_fr;
|
|
UNLOCK_OR_FRAME(old_top);
|
|
|
|
#ifdef TABLING
|
|
/* update subgoal frames in the maintained private branches */
|
|
sg_frame = LOCAL_top_sg_fr;
|
|
while (sg_frame && YOUNGER_CP(SgFr_gen_cp(sg_frame), B)) {
|
|
choiceptr top_cp_on_branch;
|
|
top_cp_on_branch = SgFr_gen_cp(sg_frame);
|
|
while (YOUNGER_CP(top_cp_on_branch, B)) {
|
|
top_cp_on_branch = top_cp_on_branch->cp_b;
|
|
}
|
|
SgFr_gen_top_or_fr(sg_frame) = top_cp_on_branch->cp_or_fr;
|
|
sg_frame = SgFr_next(sg_frame);
|
|
}
|
|
/* update worker Q top subgoal frame */
|
|
REMOTE_top_sg_fr(worker_q) = sg_frame;
|
|
/* update subgoal frames in the recently shared branches */
|
|
while (sg_frame && YOUNGER_CP(SgFr_gen_cp(sg_frame), LOCAL_top_cp_on_stack)) {
|
|
SgFr_gen_worker(sg_frame) = MAX_WORKERS;
|
|
SgFr_gen_top_or_fr(sg_frame) = SgFr_gen_cp(sg_frame)->cp_or_fr;
|
|
sg_frame = SgFr_next(sg_frame);
|
|
}
|
|
|
|
/* update dependency frames in the maintained private branches */
|
|
dep_frame = LOCAL_top_dep_fr;
|
|
while (YOUNGER_CP(DepFr_cons_cp(dep_frame), B)) {
|
|
choiceptr top_cp_on_branch;
|
|
top_cp_on_branch = DepFr_cons_cp(dep_frame);
|
|
while (YOUNGER_CP(top_cp_on_branch, B)) {
|
|
top_cp_on_branch = top_cp_on_branch->cp_b;
|
|
}
|
|
DepFr_top_or_fr(dep_frame) = top_cp_on_branch->cp_or_fr;
|
|
dep_frame = DepFr_next(dep_frame);
|
|
}
|
|
/* update worker Q top dependency frame */
|
|
REMOTE_top_dep_fr(worker_q) = dep_frame;
|
|
/* update dependency frames in the recently shared branches */
|
|
while (YOUNGER_CP(DepFr_cons_cp(dep_frame), LOCAL_top_cp_on_stack)) {
|
|
DepFr_top_or_fr(dep_frame) = DepFr_cons_cp(dep_frame)->cp_or_fr;
|
|
dep_frame = DepFr_next(dep_frame);
|
|
}
|
|
#endif /* TABLING */
|
|
|
|
#ifdef DEBUG_OPTYAP
|
|
{ dep_fr_ptr aux_dep_fr = LOCAL_top_dep_fr;
|
|
while(aux_dep_fr != GLOBAL_root_dep_fr) {
|
|
choiceptr top_cp_on_branch;
|
|
top_cp_on_branch = DepFr_cons_cp(aux_dep_fr);
|
|
while (YOUNGER_CP(top_cp_on_branch, B)) {
|
|
top_cp_on_branch = top_cp_on_branch->cp_b;
|
|
}
|
|
OPTYAP_ERROR_CHECKING(share_private_nodes, top_cp_on_branch->cp_or_fr != DepFr_top_or_fr(aux_dep_fr));
|
|
aux_dep_fr = DepFr_next(aux_dep_fr);
|
|
}
|
|
}
|
|
#endif /* DEBUG_OPTYAP */
|
|
|
|
/* update top shared nodes */
|
|
#ifdef TABLING
|
|
REMOTE_top_cp_on_stack(worker_q) = LOCAL_top_cp_on_stack =
|
|
#endif /* TABLING */
|
|
REMOTE_top_cp(worker_q) = LOCAL_top_cp = B;
|
|
REMOTE_top_or_fr(worker_q) = LOCAL_top_or_fr = LOCAL_top_cp->cp_or_fr;
|
|
}
|
|
|
|
#ifdef TABLING_INNER_CUTS
|
|
/* update worker Q pruning scope */
|
|
if (LOCAL_pruning_scope && EQUAL_OR_YOUNGER_CP(LOCAL_top_cp, LOCAL_pruning_scope)) {
|
|
REMOTE_pruning_scope(worker_q) = LOCAL_pruning_scope;
|
|
PUT_IN_PRUNING(worker_q);
|
|
} else {
|
|
PUT_OUT_PRUNING(worker_q);
|
|
REMOTE_pruning_scope(worker_q) = NULL;
|
|
}
|
|
#endif /* TABLING_INNER_CUTS */
|
|
|
|
/* update worker Q prune request */
|
|
if (LOCAL_prune_request) {
|
|
CUT_send_prune_request(worker_q, LOCAL_prune_request);
|
|
}
|
|
|
|
/* update load and return */
|
|
REMOTE_load(worker_q) = LOCAL_load = 0;
|
|
return;
|
|
}
|
|
#endif /* YAPOR_COPY */
|
|
|