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|
/**********************************************************************
The OPTYap Prolog system
OPTYap extends the Yap Prolog system to support or-parallel tabling
Copyright: R. Rocha and NCC - University of Porto, Portugal
File: or.engine.c
version: $Id: or.engine.c,v 1.10 2005/06/03 18:28:11 ricroc Exp $
**********************************************************************/
/* ------------------ **
** Includes **
** ------------------ */
#include "Yap.h"
#ifdef ENV_COPY
#ifdef HAVE_STRING_H
#include <string.h>
#endif /* HAVE_STRING_H */
#include "Yatom.h"
#include "Heap.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 COMPUTE_SEGMENTS_TO_COPY_TO(Q) \
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)
#define P_COPY_GLOBAL_TO(Q) \
memcpy((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) \
memcpy((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) \
memcpy((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) \
memcpy((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) \
memcpy((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) \
memcpy((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;
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) = B_BASE;
return;
}
void 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 <= 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;
}
/* 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 != ready);
#endif /* TABLING */
LOCAL_reply_signal = sharing;
REMOTE_reply_signal(worker_q) = sharing;
share_private_nodes(worker_q);
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);
LOCAL_share_request = MAX_WORKERS;
PUT_IN_REQUESTABLE(worker_id);
return;
}
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;
}
#ifdef YAPOR_ERRORS
if (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))
YAPOR_ERROR_MESSAGE("prune ltt > worker_p branch ltt (q_share_work)");
#endif /* YAPOR_ERRORS */
/* there is no pending prune with worker p at right --> safe move to worker p branch */
BRANCH(worker_id, OrFr_depth(LOCAL_top_or_fr)) = BRANCH(worker_p, OrFr_depth(LOCAL_top_or_fr));
LOCAL_prune_request = NULL;
UNLOCK_OR_FRAME(LOCAL_top_or_fr);
/* unbind variables */
aux_tr = LOCAL_top_cp->cp_tr;
#ifdef TABLING_ERRORS
if (TR < aux_tr)
TABLING_ERROR_MESSAGE("TR < aux_tr (q_share_work)");
#endif /* TABLING_ERRORS */
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)) {
/* avoid frozen segments */
aux_cell = (CELL) RepPair(aux_cell);
if ((ADDR) aux_cell >= TrailBase) {
TR = (tr_fr_ptr) aux_cell;
#ifdef TABLING_ERRORS
if (TR > (tr_fr_ptr) TrailTop)
TABLING_ERROR_MESSAGE("TR > TrailTop (q_share_work)");
if (TR < aux_tr)
TABLING_ERROR_MESSAGE("TR < aux_tr (q_share_work)");
#endif /* TABLING_ERRORS */
}
#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 */
}
}
#ifdef OPTYAP_ERRORS
if (LOCAL_top_cp != LOCAL_top_cp_on_stack)
OPTYAP_ERROR_MESSAGE("LOCAL_top_cp != LOCAL_top_cp_on_stack (q_share_work)");
if (YOUNGER_CP(B_FZ, LOCAL_top_cp))
OPTYAP_ERROR_MESSAGE("YOUNGER_CP(B_FZ, LOCAL_top_cp) (q_share_work)");
#endif /* OPTYAP_ERRORS */
#ifdef YAPOR_ERRORS
if (LOCAL_reply_signal != ready)
YAPOR_ERROR_MESSAGE("LOCAL_reply_signal != ready (q_share_work)");
#endif /* YAPOR_ERRORS */
/* 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 == ready);
if (LOCAL_reply_signal == no_sharing) {
/* sharing request refused */
LOCAL_reply_signal = 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) = ready;
#else
REMOTE_reply_signal(worker_p) = copy_done;
#endif /* TABLING */
while (LOCAL_reply_signal != copy_done);
/* install fase --> TR and LOCAL_top_cp->cp_tr are equal */
aux_tr = ((choiceptr) LOCAL_start_local_copy)->cp_tr;
NEW_MAHASH((ma_h_inner_struct *)H);
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)) {
#ifdef YAPOR_ERRORS
if ((CELL *)aux_cell < H0)
YAPOR_ERROR_MESSAGE("aux_cell < H0 (q_share_work)");
if ((ADDR)aux_cell > Yap_LocalBase)
YAPOR_ERROR_MESSAGE("aux_cell > LocalBase (q_share_work)");
#endif /* YAPOR_ERRORS */
#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)) {
/* avoid frozen segments */
aux_cell = (CELL) RepPair(aux_cell);
if ((ADDR) aux_cell >= TrailBase)
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)) &&
!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 */
}
}
/* update registers and return */
#ifndef TABLING
REMOTE_reply_signal(worker_p) = ready;
#endif /* TABLING */
LOCAL_reply_signal = ready;
PUT_IN_REQUESTABLE(worker_id);
TR = (tr_fr_ptr) LOCAL_end_trail_copy;
#ifdef TABLING
adjust_freeze_registers();
#endif /* TABLING */
return TRUE;
}
/* ------------------------- **
** Local functions **
** ------------------------- */
static
void share_private_nodes(int worker_q) {
choiceptr sharing_node = B;
#ifdef OPTYAP_ERRORS
if (YOUNGER_CP(LOCAL_top_cp, LOCAL_top_cp_on_stack)) {
OPTYAP_ERROR_MESSAGE("YOUNGER_CP(LOCAL_top_cp, LOCAL_top_cp_on_stack) (share_private_nodes)");
} else {
choiceptr aux_cp = B;
while (aux_cp != LOCAL_top_cp) {
if (YOUNGER_CP(LOCAL_top_cp, aux_cp)) {
OPTYAP_ERROR_MESSAGE("LOCAL_top_cp not in branch (share_private_nodes)");
break;
}
if (EQUAL_OR_YOUNGER_CP(LOCAL_top_cp_on_stack, aux_cp)) {
OPTYAP_ERROR_MESSAGE("shared frozen segments in branch (share_private_nodes)");
break;
}
aux_cp = aux_cp->cp_b;
}
}
#endif /* OPTYAP_ERRORS */
#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 OPTYAP_ERRORS
{ or_fr_ptr aux_or_fr;
aux_or_fr = LOCAL_top_or_fr;
while (aux_or_fr != REMOTE_top_or_fr(worker_q)) {
if (YOUNGER_CP(OrFr_node(REMOTE_top_or_fr(worker_q)), OrFr_node(aux_or_fr))) {
OPTYAP_ERROR_MESSAGE("YOUNGER_CP(OrFr_node(REMOTE_top_or_fr(worker_q)), OrFr_node(aux_or_fr)) (share_private_nodes)");
break;
}
aux_or_fr = OrFr_next_on_stack(aux_or_fr);
}
}
#endif /* OPTYAP_ERRORS */
/* 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_base, *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_base = stack = (CELL *)Yap_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 OPTYAP_ERRORS
if (next_node_on_branch) {
choiceptr aux_cp = B;
while (aux_cp != next_node_on_branch) {
if (sharing_node == aux_cp)
OPTYAP_ERROR_MESSAGE("sharing_node on branch (share_private_nodes)");
if (YOUNGER_CP(next_node_on_branch, aux_cp)) {
OPTYAP_ERROR_MESSAGE("next_node_on_branch not in branch (share_private_nodes)");
break;
}
aux_cp = aux_cp->cp_b;
}
} else {
choiceptr aux_cp = B;
while (aux_cp != sharing_node) {
if (YOUNGER_CP(sharing_node, aux_cp)) {
OPTYAP_ERROR_MESSAGE("sharing_node not in branch (share_private_nodes)");
break;
}
aux_cp = aux_cp->cp_b;
}
}
#endif /* OPTYAP_ERRORS */
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;
#ifdef YAPOR_ERRORS
if (sharing_node->cp_ap == GETWORK || sharing_node->cp_ap == GETWORK_SEQ)
YAPOR_ERROR_MESSAGE("choicepoint already shared (share_private_nodes)");
#endif /* YAPOR_ERRORS */
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_EXPAND1(stack, stack_limit, stack_base);
STACK_PUSH(sharing_node, stack);
STACK_CHECK_EXPAND1(stack, stack_limit, stack_base);
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 */
#ifdef OPTYAP_ERRORS
if (next_node_on_branch && YOUNGER_CP(next_node_on_branch, sharing_node))
OPTYAP_ERROR_MESSAGE("frozen node greater than next_node_on_branch (share_private_nodes)");
#endif /* OPTYAP_ERRORS */
}
/* 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, stack_base)) {
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_DEPTH)
Yap_Error(INTERNAL_ERROR, 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);
}
#ifdef YAPOR_ERRORS
if (depth != OrFr_depth(LOCAL_top_or_fr))
YAPOR_ERROR_MESSAGE("incorrect depth value (share_private_nodes)");
#endif /* YAPOR_ERRORS */
#ifdef OPTYAP_ERRORS
{ 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);
if (OrFr_next(aux_or_fr) != aux_cp->cp_b->cp_or_fr)
OPTYAP_ERROR_MESSAGE("OrFr_next not in branch (share_private_nodes)");
if (OrFr_nearest_livenode(aux_or_fr) != aux_cp->cp_b->cp_or_fr)
OPTYAP_ERROR_MESSAGE("OrFr_nearest_livenode not in branch (share_private_nodes)");
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) {
if (YOUNGER_CP(OrFr_node(nearest_leftnode), aux_cp)) {
OPTYAP_ERROR_MESSAGE("OrFr_nearest_leftnode not in branch (share_private_nodes)");
break;
}
aux_cp = aux_cp->cp_b;
}
aux_or_fr = OrFr_next_on_stack(aux_or_fr);
}
}
#endif /* OPTYAP_ERRORS */
/* 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);
}
#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 OPTYAP_ERRORS
{ 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;
}
if (top_cp_on_branch->cp_or_fr != DepFr_top_or_fr(aux_dep_fr))
OPTYAP_ERROR_MESSAGE("Error on DepFr_top_or_fr (share_private_nodes)");
aux_dep_fr = DepFr_next(aux_dep_fr);
}
}
#endif /* OPTYAP_ERRORS */
/* 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 /* ENV_COPY */
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