56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
/*
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* Ikarus Scheme -- A compiler for R6RS Scheme.
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* Copyright (C) 2006,2007,2008 Abdulaziz Ghuloum
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 3 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "ikarus-data.h"
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ikptr
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ikrt_weak_cons(ikptr a, ikptr d, ikpcb* pcb){
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ikptr ap = pcb->weak_pairs_ap;
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ikptr nap = ap + pair_size;
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ikptr p;
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if(nap > pcb->weak_pairs_ep){
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ikptr mem = ik_mmap_typed(pagesize, weak_pairs_mt, pcb);
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pcb->weak_pairs_ap = mem + pair_size;
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pcb->weak_pairs_ep = mem + pagesize;
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p = mem + pair_tag;
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}
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else {
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pcb->weak_pairs_ap = nap;
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p = ap + pair_tag;
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}
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ref(p, off_car) = a;
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ref(p, off_cdr) = d;
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return p;
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}
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ikptr
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ikrt_is_weak_pair(ikptr x, ikpcb* pcb){
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if(tagof(x) != pair_tag){
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return false_object;
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}
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unsigned int t = pcb->segment_vector[page_index(x)];
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if((t & type_mask) == weak_pairs_type){
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return true_object;
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} else {
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return false_object;
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}
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}
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