WL#2595 - atomic operations

BitKeeper/etc/ignore:
  Added mysys/test_atomic to the ignore list

1 files changed, 40 insertions, 0 deletions

diff --git a/mysys/my_getncpus.c b/mysys/my_getncpus.c
new file mode 100644
index 00000000000..6c45617e496
--- /dev/null
+++ b/mysys/my_getncpus.c
@@ -0,0 +1,40 @@
+/* Copyright (C) 2006 MySQL AB
+
+   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
+
+/* get the number of (online) CPUs */
+
+#include "mysys_priv.h"
+#include <unistd.h>
+
+static int ncpus=0;
+
+#ifdef _SC_NPROCESSORS_ONLN
+int my_getncpus()
+{
+  if (!ncpus)
+    ncpus= sysconf(_SC_NPROCESSORS_ONLN);
+  return ncpus;
+}
+
+#else
+/* unknown */
+int my_getncpus()
+{
+  return 2;
+}
+
+#endif
+