From 354bb40e75d94466e91fe6960523612c9d17ccfb Mon Sep 17 00:00:00 2001
From: Karen Arutyunov <karen@codesynthesis.com>
Date: Thu, 2 Nov 2017 23:11:29 +0300
Subject: Add implementation

---
 mysql/atomic/gcc_atomic.h | 94 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 mysql/atomic/gcc_atomic.h

(limited to 'mysql/atomic/gcc_atomic.h')

diff --git a/mysql/atomic/gcc_atomic.h b/mysql/atomic/gcc_atomic.h
new file mode 100644
index 0000000..8807857
--- /dev/null
+++ b/mysql/atomic/gcc_atomic.h
@@ -0,0 +1,94 @@
+#ifndef GCC_ATOMIC_INCLUDED
+#define GCC_ATOMIC_INCLUDED
+
+/* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+
+   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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
+
+/* New GCC __atomic builtins introduced in GCC 4.7 */
+
+static inline int my_atomic_cas32(int32 volatile *a, int32 *cmp, int32 set)
+{
+  return __atomic_compare_exchange_n(a, cmp, set, 0,
+                                     __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST);
+}
+
+static inline int my_atomic_cas64(int64 volatile *a, int64 *cmp, int64 set)
+{
+  return __atomic_compare_exchange_n(a, cmp, set, 0,
+                                     __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST);
+}
+
+static inline int my_atomic_casptr(void * volatile *a, void **cmp, void *set)
+{
+  return __atomic_compare_exchange_n(a, cmp, set, 0,
+                                     __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST);
+}
+
+static inline int32 my_atomic_add32(int32 volatile *a, int32 v)
+{
+  return __atomic_fetch_add(a, v, __ATOMIC_SEQ_CST);
+}
+
+static inline int64 my_atomic_add64(int64 volatile *a, int64 v)
+{
+  return __atomic_fetch_add(a, v, __ATOMIC_SEQ_CST);
+}
+
+static inline int32 my_atomic_fas32(int32 volatile *a, int32 v)
+{
+  return __atomic_exchange_n(a, v, __ATOMIC_SEQ_CST);
+}
+
+static inline int64 my_atomic_fas64(int64 volatile *a, int64 v)
+{
+  return __atomic_exchange_n(a, v, __ATOMIC_SEQ_CST);
+}
+
+static inline void * my_atomic_fasptr(void * volatile *a, void * v)
+{
+  return __atomic_exchange_n(a, v, __ATOMIC_SEQ_CST);
+}
+
+static inline int32 my_atomic_load32(int32 volatile *a)
+{
+  return __atomic_load_n(a, __ATOMIC_SEQ_CST);
+}
+
+static inline int64 my_atomic_load64(int64 volatile *a)
+{
+  return __atomic_load_n(a, __ATOMIC_SEQ_CST);
+}
+
+static inline void* my_atomic_loadptr(void * volatile *a)
+{
+  return __atomic_load_n(a, __ATOMIC_SEQ_CST);
+}
+
+static inline void my_atomic_store32(int32 volatile *a, int32 v)
+{
+  __atomic_store_n(a, v, __ATOMIC_SEQ_CST);
+}
+
+static inline void my_atomic_store64(int64 volatile *a, int64 v)
+{
+  __atomic_store_n(a, v, __ATOMIC_SEQ_CST);
+}
+
+static inline void my_atomic_storeptr(void * volatile *a, void *v)
+{
+  __atomic_store_n(a, v, __ATOMIC_SEQ_CST);
+}
+
+#endif /* GCC_ATOMIC_INCLUDED */
-- 
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