Beispiel #1
0
int q_share_work(int worker_p) {
  LOCK_OR_FRAME(LOCAL_top_or_fr);
  if (Get_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);

  /* 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;
  }
  /* exit this process */
  exit(0);
}
Beispiel #2
0
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;
}
Beispiel #3
0
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 (Get_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, 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 */
  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);

  reset_trail(LOCAL_top_cp->cp_tr, TR);
  TR = LOCAL_top_cp->cp_tr;
 
  /* 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;
  }

  /* install fase --> TR and LOCAL_top_cp->cp_tr are equal */
  TR = ((choiceptr)LOCAL_end_local_copy)->cp_tr;
  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)) {
      CELL *ptr = STACK_TO_SBA(aux_cell);
      *ptr = TrailVal(aux_tr);
    } else if ((ADDR) RepPair(aux_cell) >= HeapTop) {
      /* avoid frozen segments */
      aux_tr = (tr_fr_ptr) RepPair(aux_cell);
#ifdef MULTI_ASSIGNMENT_VARIABLES
    } else if (IsApplTerm(aux_cell)) {
      CELL *cell_ptr = RepAppl(aux_cell);
      if (!lookup_ma_var(cell_ptr)) {
	/* first time we found the variable, let's put the new value */
	CELL *ptr = STACK_TO_SBA(cell_ptr);
	*ptr = TrailVal(aux_tr);
      }
      /* skip the old value */
      aux_tr--;
    }
#endif /* MULTI_ASSIGNMENT_VARIABLES */
  }

  /* update registers and return */
  /* REMOTE_reply_signal(worker_p) = worker_ready; */
  LOCAL_reply_signal = worker_ready;
  PUT_IN_REQUESTABLE(worker_id);
  TR = LOCAL_top_cp->cp_tr;
  return TRUE;
}