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_sync.h | 106 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 106 insertions(+)
 create mode 100644 mysql/atomic/gcc_sync.h

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

diff --git a/mysql/atomic/gcc_sync.h b/mysql/atomic/gcc_sync.h
new file mode 100644
index 0000000..82eea35
--- /dev/null
+++ b/mysql/atomic/gcc_sync.h
@@ -0,0 +1,106 @@
+#ifndef GCC_SYNC_INCLUDED
+#define GCC_SYNC_INCLUDED
+
+/* Copyright (c) 2008, 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 */
+
+/* Old GCC __sync builtins introduced in GCC 4.1 */
+
+static inline int my_atomic_cas32(int32 volatile *a, int32 *cmp, int32 set)
+{
+  int32 cmp_val= *cmp;
+  int32 sav= __sync_val_compare_and_swap(a, cmp_val, set);
+  int ret= (sav == cmp_val);
+  if (!ret)
+    *cmp = sav;
+  return ret;
+}
+
+static inline int my_atomic_cas64(int64 volatile *a, int64 *cmp, int64 set)
+{
+  int64 cmp_val= *cmp;
+  int64 sav= __sync_val_compare_and_swap(a, cmp_val, set);
+  int ret= (sav == cmp_val);
+  if (!ret)
+    *cmp = sav;
+  return ret;
+}
+
+static inline int my_atomic_casptr(void * volatile *a, void **cmp, void *set)
+{
+  void *cmp_val= *cmp;
+  void *sav= __sync_val_compare_and_swap(a, cmp_val, set);
+  int ret= (sav == cmp_val);
+  if (!ret)
+    *cmp = sav;
+  return ret;
+}
+
+static inline int32 my_atomic_add32(int32 volatile *a, int32 v)
+{
+  return __sync_fetch_and_add(a, v);
+}
+
+static inline int64 my_atomic_add64(int64 volatile *a, int64 v)
+{
+  return __sync_fetch_and_add(a, v);
+}
+
+static inline int32 my_atomic_fas32(int32 volatile *a, int32 v)
+{
+  return __sync_lock_test_and_set(a, v);
+}
+
+static inline int64 my_atomic_fas64(int64 volatile *a, int64 v)
+{
+  return __sync_lock_test_and_set(a, v);
+}
+
+static inline void * my_atomic_fasptr(void * volatile *a, void * v)
+{
+  return __sync_lock_test_and_set(a, v);
+}
+
+static inline int32 my_atomic_load32(int32 volatile *a)
+{
+  return __sync_fetch_and_or(a, 0);
+}
+
+static inline int64 my_atomic_load64(int64 volatile *a)
+{
+  return __sync_fetch_and_or(a, 0);
+}
+
+static inline void* my_atomic_loadptr(void * volatile *a)
+{
+  return __sync_fetch_and_or(a, 0);
+}
+
+static inline void my_atomic_store32(int32 volatile *a, int32 v)
+{
+  (void) __sync_lock_test_and_set(a, v);
+}
+
+static inline void my_atomic_store64(int64 volatile *a, int64 v)
+{
+  (void) __sync_lock_test_and_set(a, v);
+}
+
+static inline void my_atomic_storeptr(void * volatile *a, void *v)
+{
+  (void) __sync_lock_test_and_set(a, v);
+}
+
+#endif /* GCC_SYNC_INCLUDED */
-- 
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