WL#2595 - atomic operations

include/my_atomic.h

@@ -0,0 +1,46 @@
+/* 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 */
+
+#ifndef atomic_rwlock_init
+
+#ifdef MY_ATOMIC_EXTRA_DEBUG
+#ifndef MY_ATOMIC_MODE_RWLOCKS
+#error MY_ATOMIC_EXTRA_DEBUG can be only used with MY_ATOMIC_MODE_RWLOCKS
+#endif
+#define LOCK_PTR void *rw;
+#else
+#define LOCK_PTR
+#endif
+
+typedef volatile struct {uint8   val; LOCK_PTR} my_atomic_8_t;
+typedef volatile struct {uint16  val; LOCK_PTR} my_atomic_16_t;
+typedef volatile struct {uint32  val; LOCK_PTR} my_atomic_32_t;
+typedef volatile struct {uint64  val; LOCK_PTR} my_atomic_64_t;
+
+#ifndef MY_ATOMIC_MODE_RWLOCKS
+#include "atomic/nolock.h"
+#endif
+
+#ifndef my_atomic_rwlock_init
+#include "atomic/rwlock.h"
+#endif
+
+#define MY_ATOMIC_OK       0
+#define MY_ATOMIC_NOT_1CPU 1
+extern int my_atomic_initialize();
+
+#endif
+