comparison src/fftw-3.3.3/threads/api.c @ 10:37bf6b4a2645

Add FFTW3

+/*
+ * Copyright (c) 2003, 2007-11 Matteo Frigo
+ * Copyright (c) 2003, 2007-11 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 "api.h"
+#include "threads.h"
+
+static int threads_inited = 0;
+
+static void threads_register_hooks(void)
+{
+     X(mksolver_ct_hook) = X(mksolver_ct_threads);
+     X(mksolver_hc2hc_hook) = X(mksolver_hc2hc_threads);
+}
+
+static void threads_unregister_hooks(void)
+{
+     X(mksolver_ct_hook) = 0;
+     X(mksolver_hc2hc_hook) = 0;
+}
+
+/* should be called before all other FFTW functions! */
+int X(init_threads)(void)
+{
+     if (!threads_inited) {
+	  planner *plnr;
+
+          if (X(ithreads_init)())
+               return 0;
+
+	  threads_register_hooks();
+
+	  /* this should be the first time the_planner is called,
+	     and hence the time it is configured */
+	  plnr = X(the_planner)();
+	  X(threads_conf_standard)(plnr);
+	       
+          threads_inited = 1;
+     }
+     return 1;
+}
+
+
+void X(cleanup_threads)(void)
+{
+     X(cleanup)();
+     if (threads_inited) {
+	  X(threads_cleanup)();
+	  threads_unregister_hooks();
+	  threads_inited = 0;
+     }
+}
+
+void X(plan_with_nthreads)(int nthreads)
+{
+     planner *plnr;
+
+     if (!threads_inited) {
+	  X(cleanup)();
+	  X(init_threads)();
+     }
+     A(threads_inited);
+     plnr = X(the_planner)();
+     plnr->nthr = X(imax)(1, nthreads);
+}