MFC r282115, r282152, r282201

MFV	r282150
libgomp: Update to version 4.3.5.
bring initial BSD support from upstream.

This was not meant to be MFC'd at first but the original OMP support
for FreeBSD was in very poor shape.  The effect of this change should
be minimal as all ports are already using the version of libgomp that
comes with the gcc ports. The local libgomp is planned to be disabled
for platforms that are not using older gcc by default so this version
of libgomp will not be shipped in tier-1 platform releases.

Discussed with:	emaste

1 files changed, 82 insertions, 0 deletions

diff --git a/contrib/gcclibs/libgomp/config/mingw32/proc.c b/contrib/gcclibs/libgomp/config/mingw32/proc.c
new file mode 100644
index 0000000..def7bb5
--- /dev/null
+++ b/contrib/gcclibs/libgomp/config/mingw32/proc.c
@@ -0,0 +1,82 @@
+/* Copyright (C) 2007 Free Software Foundation, Inc.
+   Contributed by Danny Smith <dannysmith@users.sourceforge.net>
+
+   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 contains system specific routines related to counting
+   online processors and dynamic load balancing.  It is expected that
+   a system may well want to write special versions of each of these.
+
+   The following implementation uses win32 API routines.  */
+
+#include "libgomp.h"
+#include <windows.h>
+
+/* Count the CPU's currently available to this process.  */
+static int
+count_avail_process_cpus ()
+{
+  DWORD_PTR process_cpus;
+  DWORD_PTR system_cpus;
+
+  if (GetProcessAffinityMask (GetCurrentProcess (),
+			      &process_cpus, &system_cpus))
+    {
+      unsigned int count;
+      for (count = 0; process_cpus != 0; process_cpus >>= 1)  
+	if (process_cpus & 1)
+	  count++;
+      return count;
+    }
+  return 1;
+}
+
+/* At startup, determine the default number of threads.  It would seem
+   this should be related to the number of cpus available to the process.  */
+
+void
+gomp_init_num_threads (void)
+{
+  gomp_nthreads_var = count_avail_process_cpus ();
+}
+
+/* When OMP_DYNAMIC is set, at thread launch determine the number of
+   threads we should spawn for this team.  FIXME:  How do we adjust for
+   load average on MS Windows?  */
+
+unsigned
+gomp_dynamic_max_threads (void)
+{
+  int n_onln = count_avail_process_cpus ();
+  return n_onln > gomp_nthreads_var ? gomp_nthreads_var : n_onln;
+}
+
+int
+omp_get_num_procs (void)
+{
+  return count_avail_process_cpus ();
+}
+
+ialias (omp_get_num_procs)