mirror of
https://github.com/tildearrow/furnace.git
synced 2024-11-06 12:55:05 +00:00
68 lines
1.7 KiB
C
68 lines
1.7 KiB
C
/*
|
|
* Copyright (c) 2003, 2007-14 Matteo Frigo
|
|
* Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
*/
|
|
|
|
#include "kernel/ifftw.h"
|
|
|
|
/*
|
|
common routines for Rader solvers
|
|
*/
|
|
|
|
|
|
/* shared twiddle and omega lists, keyed by two/three integers. */
|
|
struct rader_tls {
|
|
INT k1, k2, k3;
|
|
R *W;
|
|
int refcnt;
|
|
rader_tl *cdr;
|
|
};
|
|
|
|
void X(rader_tl_insert)(INT k1, INT k2, INT k3, R *W, rader_tl **tl)
|
|
{
|
|
rader_tl *t = (rader_tl *) MALLOC(sizeof(rader_tl), TWIDDLES);
|
|
t->k1 = k1; t->k2 = k2; t->k3 = k3; t->W = W;
|
|
t->refcnt = 1; t->cdr = *tl; *tl = t;
|
|
}
|
|
|
|
R *X(rader_tl_find)(INT k1, INT k2, INT k3, rader_tl *t)
|
|
{
|
|
while (t && (t->k1 != k1 || t->k2 != k2 || t->k3 != k3))
|
|
t = t->cdr;
|
|
if (t) {
|
|
++t->refcnt;
|
|
return t->W;
|
|
} else
|
|
return 0;
|
|
}
|
|
|
|
void X(rader_tl_delete)(R *W, rader_tl **tl)
|
|
{
|
|
if (W) {
|
|
rader_tl **tp, *t;
|
|
|
|
for (tp = tl; (t = *tp) && t->W != W; tp = &t->cdr)
|
|
;
|
|
|
|
if (t && --t->refcnt <= 0) {
|
|
*tp = t->cdr;
|
|
X(ifree)(t->W);
|
|
X(ifree)(t);
|
|
}
|
|
}
|
|
}
|