added mysql source for win build

--HG--
branch : trunk

externals/mysql/mysys/my_atomic.c

@@ -0,0 +1,45 @@
+/* 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; version 2 of the License.
+
+   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 */
+
+#include <my_global.h>
+#include <my_sys.h>
+
+#ifndef HAVE_INLINE
+/* the following will cause all inline functions to be instantiated */
+#define HAVE_INLINE
+#undef STATIC_INLINE
+#define STATIC_INLINE extern
+#endif
+
+#include <my_atomic.h>
+
+/*
+  checks that the current build of atomic ops
+  can run on this machine
+
+  RETURN
+    ATOMIC_xxx values, see my_atomic.h
+*/
+int my_atomic_initialize()
+{
+  compile_time_assert(sizeof(intptr) == sizeof(void *));
+  /* currently the only thing worth checking is SMP/UP issue */
+#ifdef MY_ATOMIC_MODE_DUMMY
+  return my_getncpus() == 1 ? MY_ATOMIC_OK : MY_ATOMIC_NOT_1CPU;
+#else
+  return MY_ATOMIC_OK;
+#endif
+}
+