int p_share_work(void) {
int worker_q = LOCAL_share_request;
int son;
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 TRUE;
}
/* sharing request accepted */
REMOTE_reply_signal(worker_q) = sharing;
share_private_nodes(worker_q);
if ((son = fork()) == 0) {
worker_id = worker_q; /* child becomes requesting worker */
LOCAL = REMOTE + worker_id;
LOCAL_reply_signal = ready;
PUT_IN_REQUESTABLE(worker_id);
PUT_BUSY(worker_id);
return FALSE;
} else {
worker_pid(worker_q) = son;
LOCAL_share_request = MAX_WORKERS;
PUT_IN_REQUESTABLE(worker_id);
return TRUE;
}
}
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 <= 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;
}
/* sharing request accepted */
/* LOCAL_reply_signal = sharing; */
COMPUTE_SEGMENTS_TO_COPY_TO(worker_q);
share_private_nodes(worker_q);
REMOTE_reply_signal(worker_q) = sharing;
/* REMOTE_reply_signal(worker_q) = nodes_shared; */
/* while (LOCAL_reply_signal == sharing); */
LOCAL_share_request = MAX_WORKERS;
PUT_IN_REQUESTABLE(worker_id);
return;
}
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;
}
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;
}
void Yap_init_local_optyap_data(int wid) {
#if defined(YAPOR_THREADS) || defined(THREADS_CONSUMER_SHARING)
CACHE_REGS
#endif /* YAPOR_THREADS || THREADS_CONSUMER_SHARING */
#if defined(TABLING) && (defined(YAPOR) || defined(THREADS))
/* local data related to memory management */
#ifdef YAPOR
REMOTE_next_free_ans_node(wid) = NULL;
#elif THREADS
#ifdef USE_PAGES_MALLOC
INIT_LOCAL_PAGE_ENTRY(REMOTE_pages_void(wid), void *);
#endif
INIT_LOCAL_PAGE_ENTRY(REMOTE_pages_tab_ent(wid), struct table_entry);
#if defined(THREADS_FULL_SHARING) || defined(THREADS_CONSUMER_SHARING)
INIT_LOCAL_PAGE_ENTRY(REMOTE_pages_sg_ent(wid), struct subgoal_entry);
#endif
INIT_LOCAL_PAGE_ENTRY(REMOTE_pages_sg_fr(wid), struct subgoal_frame);
INIT_LOCAL_PAGE_ENTRY(REMOTE_pages_dep_fr(wid), struct dependency_frame);
INIT_LOCAL_PAGE_ENTRY(REMOTE_pages_sg_node(wid), struct subgoal_trie_node);
INIT_LOCAL_PAGE_ENTRY(REMOTE_pages_sg_hash(wid), struct subgoal_trie_hash);
INIT_LOCAL_PAGE_ENTRY(REMOTE_pages_ans_node(wid), struct answer_trie_node);
INIT_LOCAL_PAGE_ENTRY(REMOTE_pages_ans_hash(wid), struct answer_trie_hash);
#if defined(THREADS_FULL_SHARING)
INIT_LOCAL_PAGE_ENTRY(REMOTE_pages_ans_ref_node(wid), struct answer_ref_node);
#endif
INIT_LOCAL_PAGE_ENTRY(REMOTE_pages_gt_node(wid), struct global_trie_node);
INIT_LOCAL_PAGE_ENTRY(REMOTE_pages_gt_hash(wid), struct global_trie_hash);
#endif
#endif /* TABLING && (YAPOR || THREADS) */
#ifdef YAPOR
/* local data related to or-parallelism */
Set_REMOTE_top_cp(wid, (choiceptr)LOCAL_LocalBase);
REMOTE_top_or_fr(wid) = GLOBAL_root_or_fr;
REMOTE_load(wid) = 0;
REMOTE_share_request(wid) = MAX_WORKERS;
REMOTE_reply_signal(wid) = worker_ready;
#ifdef YAPOR_COPY
INIT_LOCK(REMOTE_lock_signals(wid));
#endif /* YAPOR_COPY */
Set_REMOTE_prune_request(wid, NULL);
INIT_LOCK(REMOTE_lock(wid));
#endif /* YAPOR */
#ifdef TABLING
/* local data related to tabling */
REMOTE_top_sg_fr(wid) = NULL;
REMOTE_top_dep_fr(wid) = NULL;
#ifdef YAPOR
REMOTE_top_dep_fr(wid) = GLOBAL_root_dep_fr;
Set_REMOTE_top_cp_on_stack(wid, (choiceptr)LOCAL_LocalBase); /* ??? */
REMOTE_top_susp_or_fr(wid) = GLOBAL_root_or_fr;
#endif /* YAPOR */
#ifdef THREADS_CONSUMER_SHARING
ThDepFr_terminator(GLOBAL_th_dep_fr(wid)) = 0;
ThDepFr_next(GLOBAL_th_dep_fr(wid)) = wid;
ThDepFr_state(GLOBAL_th_dep_fr(wid)) = working;
INIT_LOCK(ThDepFr_lock(GLOBAL_th_dep_fr(wid)));
#endif /* THREADS_CONSUMER_SHARING */
#endif /* TABLING */
return;
}
static
void share_private_nodes(int worker_q) {
int depth;
choiceptr AuxB;
or_fr_ptr or_frame, previous_or_frame;
/* initialize auxiliary variables */
AuxB = B;
previous_or_frame = NULL;
depth = OrFr_depth(LOCAL_top_or_fr);
/* sharing loop */
while (AuxB != LOCAL_top_cp) {
depth++;
ALLOC_OR_FRAME(or_frame);
INIT_LOCK(OrFr_lock(or_frame));
SetOrFr_node(or_frame, AuxB);
OrFr_alternative(or_frame) = AuxB->cp_ap;
OrFr_pend_prune_cp(or_frame) = NULL;
OrFr_nearest_leftnode(or_frame) = LOCAL_top_or_fr;
OrFr_qg_solutions(or_frame) = NULL;
BITMAP_clear(OrFr_members(or_frame));
BITMAP_insert(OrFr_members(or_frame), worker_id);
BITMAP_insert(OrFr_members(or_frame), worker_q);
if (AuxB->cp_ap && YAMOP_SEQ(AuxB->cp_ap)) {
AuxB->cp_ap = GETWORK_SEQ;
} else {
AuxB->cp_ap = GETWORK;
}
AuxB->cp_or_fr = or_frame;
AuxB = AuxB->cp_b;
if (previous_or_frame) {
OrFr_nearest_livenode(previous_or_frame) = OrFr_next(previous_or_frame) = or_frame;
}
previous_or_frame = or_frame;
}
/* initialize last or-frame pointer */
or_frame = AuxB->cp_or_fr;
if (previous_or_frame) {
OrFr_nearest_livenode(previous_or_frame) = OrFr_next(previous_or_frame) = or_frame;
}
/* update depth */
if (depth >= MAX_BRANCH_DEPTH)
Yap_Error(INTERNAL_ERROR, TermNil, "maximum depth exceded (share_private_nodes)");
or_frame = B->cp_or_fr;
while (or_frame != LOCAL_top_or_fr) {
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);
}
/* 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));
BITMAP_insert(OrFr_members(or_frame), worker_q);
UNLOCK_OR_FRAME(or_frame);
or_frame = OrFr_next_on_stack(or_frame);
}
/* update top shared nodes */
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;
/* update 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;
}
static
void share_private_nodes(int worker_q) {
int depth;
choiceptr AuxB;
or_fr_ptr or_frame, previous_or_frame;
/* initialize auxiliary variables */
AuxB = B;
previous_or_frame = NULL;
depth = OrFr_depth(LOCAL_top_or_fr);
/* sharing loop */
while (AuxB != LOCAL_top_cp) {
depth++;
ALLOC_OR_FRAME(or_frame);
INIT_LOCK(OrFr_lock(or_frame));
OrFr_node(or_frame) = AuxB;
OrFr_alternative(or_frame) = AuxB->cp_ap;
OrFr_pend_prune_cp(or_frame) = NULL;
OrFr_nearest_leftnode(or_frame) = LOCAL_top_or_fr;
OrFr_qg_solutions(or_frame) = NULL;
BITMAP_clear(OrFr_members(or_frame));
BITMAP_insert(OrFr_members(or_frame), worker_id);
BITMAP_insert(OrFr_members(or_frame), worker_q);
if (AuxB->cp_ap && YAMOP_SEQ(AuxB->cp_ap)) {
AuxB->cp_ap = GETWORK_SEQ;
} else {
AuxB->cp_ap = GETWORK;
}
AuxB->cp_or_fr = or_frame;
AuxB = AuxB->cp_b;
if (previous_or_frame) {
OrFr_nearest_livenode(previous_or_frame) = OrFr_next(previous_or_frame) = or_frame;
}
previous_or_frame = or_frame;
}
/* initialize last or-frame pointer */
or_frame = AuxB->cp_or_fr;
if (previous_or_frame) {
OrFr_nearest_livenode(previous_or_frame) = OrFr_next(previous_or_frame) = or_frame;
}
/* update depth */
if (depth >= MAX_BRANCH_DEPTH)
Yap_Error(INTERNAL_ERROR, TermNil, "maximum depth exceded (share_private_nodes)");
or_frame = B->cp_or_fr;
while (or_frame != LOCAL_top_or_fr) {
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);
}
/* 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));
BITMAP_insert(OrFr_members(or_frame), worker_q);
UNLOCK_OR_FRAME(or_frame);
or_frame = OrFr_next_on_stack(or_frame);
}
/* move conditional bindings to BA */
{
tr_fr_ptr top, tr_ptr;
top = LOCAL_top_cp->cp_tr;
tr_ptr = TR;
while (tr_ptr != top) {
CELL aux_cell = TrailTerm(--tr_ptr);
if (IsVarTerm(aux_cell) &&
((CELL *)aux_cell < B->cp_h || (choiceptr)aux_cell > B) &&
!((CELL *)aux_cell < H_FZ || (choiceptr)aux_cell > B_FZ)) {
CELL *ptr = STACK_TO_SBA(aux_cell);
*ptr = TrailVal(tr_ptr);
*(CELL *)aux_cell = (CELL)ptr;
} else if (IsPairTerm(aux_cell) && (ADDR) RepPair(aux_cell) > HeapTop) {
/* avoid frozen segments */
aux_cell = (CELL) RepPair(aux_cell);
tr_ptr = (tr_fr_ptr) aux_cell;
#ifdef MULTI_ASSIGNMENT_VARIABLES
} else {
CELL *cell_ptr = RepAppl(aux_cell);
/* first do as a for a standard cell */
if ((cell_ptr < B->cp_h || cell_ptr > (CELL *)B) && !(cell_ptr < H_FZ || (choiceptr)cell_ptr > B_FZ)) {
CELL *ptr = STACK_TO_SBA(cell_ptr);
/* we may have several bindings in the trail */
if ((CELL)ptr != *cell_ptr) {
*ptr = TrailVal(tr_ptr);
*cell_ptr = (CELL)ptr;
}
}
/* but we also need to skip the old value */
tr_ptr--;
#endif /* MULTI_ASSIGNMENT_VARIABLES */
}
}
}
/* update frozen registers */
B_FZ = B;
H_FZ = B->cp_h;
TR_FZ = B->cp_tr;
/* update top shared nodes */
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;
/* update 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;
}