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1 /*
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2 * Copyright (c) 2003, 2007-14 Matteo Frigo
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3 * Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
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4 *
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5 * This program is free software; you can redistribute it and/or modify
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6 * it under the terms of the GNU General Public License as published by
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7 * the Free Software Foundation; either version 2 of the License, or
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8 * (at your option) any later version.
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9 *
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10 * This program is distributed in the hope that it will be useful,
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 * GNU General Public License for more details.
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14 *
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15 * You should have received a copy of the GNU General Public License
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16 * along with this program; if not, write to the Free Software
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17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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18 *
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19 */
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20
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21 #include "api.h"
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22 #include "threads.h"
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23
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24 static int threads_inited = 0;
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25
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26 static void threads_register_hooks(void)
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27 {
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28 X(mksolver_ct_hook) = X(mksolver_ct_threads);
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29 X(mksolver_hc2hc_hook) = X(mksolver_hc2hc_threads);
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30 }
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31
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32 static void threads_unregister_hooks(void)
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33 {
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34 X(mksolver_ct_hook) = 0;
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35 X(mksolver_hc2hc_hook) = 0;
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36 }
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37
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38 /* should be called before all other FFTW functions! */
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39 int X(init_threads)(void)
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40 {
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41 if (!threads_inited) {
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42 planner *plnr;
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43
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44 if (X(ithreads_init)())
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45 return 0;
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46
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47 threads_register_hooks();
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48
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49 /* this should be the first time the_planner is called,
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50 and hence the time it is configured */
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51 plnr = X(the_planner)();
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52 X(threads_conf_standard)(plnr);
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53
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54 threads_inited = 1;
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55 }
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56 return 1;
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57 }
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58
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59
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60 void X(cleanup_threads)(void)
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61 {
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62 X(cleanup)();
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63 if (threads_inited) {
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64 X(threads_cleanup)();
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65 threads_unregister_hooks();
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66 threads_inited = 0;
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67 }
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68 }
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69
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70 void X(plan_with_nthreads)(int nthreads)
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71 {
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72 planner *plnr;
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73
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74 if (!threads_inited) {
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75 X(cleanup)();
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76 X(init_threads)();
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77 }
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78 A(threads_inited);
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79 plnr = X(the_planner)();
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80 plnr->nthr = X(imax)(1, nthreads);
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81 }
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82
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83 void X(make_planner_thread_safe)(void)
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84 {
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85 X(threads_register_planner_hooks)();
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86 }
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