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https://github.com/tildearrow/furnace.git
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69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
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/*
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* Copyright (c) 2003, 2007-14 Matteo Frigo
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* Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU 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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#include "kernel/ifftw.h"
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/*
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common routines for Rader solvers
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*/
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/* shared twiddle and omega lists, keyed by two/three integers. */
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struct rader_tls {
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INT k1, k2, k3;
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R *W;
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int refcnt;
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rader_tl *cdr;
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};
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void X(rader_tl_insert)(INT k1, INT k2, INT k3, R *W, rader_tl **tl)
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{
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rader_tl *t = (rader_tl *) MALLOC(sizeof(rader_tl), TWIDDLES);
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t->k1 = k1; t->k2 = k2; t->k3 = k3; t->W = W;
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t->refcnt = 1; t->cdr = *tl; *tl = t;
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}
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R *X(rader_tl_find)(INT k1, INT k2, INT k3, rader_tl *t)
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{
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while (t && (t->k1 != k1 || t->k2 != k2 || t->k3 != k3))
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t = t->cdr;
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if (t) {
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++t->refcnt;
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return t->W;
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} else
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return 0;
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}
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void X(rader_tl_delete)(R *W, rader_tl **tl)
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{
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if (W) {
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rader_tl **tp, *t;
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for (tp = tl; (t = *tp) && t->W != W; tp = &t->cdr)
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;
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if (t && --t->refcnt <= 0) {
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*tp = t->cdr;
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X(ifree)(t->W);
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X(ifree)(t);
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}
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}
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}
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