1 files changed, 126 insertions, 0 deletions
diff --git a/libgomp/parallel.c b/libgomp/parallel.c
new file mode 100644
index 00000000000..edd344a90a8
--- /dev/null
+++ b/libgomp/parallel.c
@@ -0,0 +1,126 @@
+/* Copyright (C) 2005 Free Software Foundation, Inc.
+   Contributed by Richard Henderson <rth@redhat.com>.
+
+   This file is part of the GNU OpenMP Library (libgomp).
+
+   Libgomp is free software; you can redistribute it and/or modify it
+   under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation; either version 2.1 of the License, or
+   (at your option) any later version.
+
+   Libgomp 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 Lesser General Public License for
+   more details.
+
+   You should have received a copy of the GNU Lesser General Public License 
+   along with libgomp; see the file COPYING.LIB.  If not, write to the
+   Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
+
+/* As a special exception, if you link this library with other files, some
+   of which are compiled with GCC, to produce an executable, this library
+   does not by itself cause the resulting executable to be covered by the
+   GNU General Public License.  This exception does not however invalidate
+   any other reasons why the executable file might be covered by the GNU
+   General Public License.  */
+
+/* This file handles the (bare) PARALLEL construct.  */
+
+#include "libgomp.h"
+
+
+/* Determine the number of threads to be launched for a PARALLEL construct.
+   This algorithm is explicitly described in OpenMP 2.5 section 2.4.1.
+   SPECIFIED is a combination of the NUM_THREADS clause and the IF clause.
+   If the IF clause is false, SPECIFIED is forced to 1.  When NUM_THREADS
+   is not present, SPECIFIED is 0.  */
+
+unsigned
+gomp_resolve_num_threads (unsigned specified)
+{
+  /* Early exit for false IF condition or degenerate NUM_THREADS.  */
+  if (specified == 1)
+    return 1;
+
+  /* If this is a nested region, and nested regions are disabled, force
+     this team to use only one thread.  */
+  if (gomp_thread()->ts.team && !gomp_nest_var)
+    return 1;
+
+  /* If NUM_THREADS not specified, use nthreads_var.  */
+  if (specified == 0)
+    specified = gomp_nthreads_var;
+
+  /* If dynamic threads are enabled, bound the number of threads
+     that we launch.  */
+  if (gomp_dyn_var)
+    {
+      unsigned dyn = gomp_dynamic_max_threads ();
+      if (dyn < specified)
+	return dyn;
+    }
+
+  return specified;
+}
+
+void
+GOMP_parallel_start (void (*fn) (void *), void *data, unsigned num_threads)
+{
+  num_threads = gomp_resolve_num_threads (num_threads);
+  gomp_team_start (fn, data, num_threads, NULL);
+}
+
+void
+GOMP_parallel_end (void)
+{
+  gomp_team_end ();
+}
+
+
+/* The public OpenMP API for thread and team related inquiries.  */
+
+int
+omp_get_num_threads (void)
+{
+  struct gomp_team *team = gomp_thread ()->ts.team;
+  return team ? team->nthreads : 1;
+}
+
+/* ??? Does this function need to disregard dyn_var?  I don't see
+   how else one could get a useable "maximum".  */
+
+int
+omp_get_max_threads (void)
+{
+  return gomp_resolve_num_threads (0);
+}
+
+int
+omp_get_thread_num (void)
+{
+  return gomp_thread ()->ts.team_id;
+}
+
+/* ??? This isn't right.  The definition of this function is false if any
+   of the IF clauses for any of the parallels is false.  Which is not the
+   same thing as any outer team having more than one thread.  */
+
+int omp_in_parallel (void)
+{
+  struct gomp_team *team = gomp_thread ()->ts.team;
+
+  while (team)
+    {
+      if (team->nthreads > 1)
+	return true;
+      team = team->prev_ts.team;
+    }
+
+  return false;
+}
+
+ialias (omp_get_num_threads)
+ialias (omp_get_max_threads)
+ialias (omp_get_thread_num)
+ialias (omp_in_parallel)