1 files changed, 140 insertions, 0 deletions
diff --git a/include/atomic/generic-msvc.h b/include/atomic/generic-msvc.h
new file mode 100644
index 00000000..ff2a5434
--- /dev/null
+++ b/include/atomic/generic-msvc.h
@@ -0,0 +1,140 @@
+#ifndef ATOMIC_MSC_INCLUDED
+#define ATOMIC_MSC_INCLUDED
+
+/* Copyright (c) 2006, 2014, 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 02110-1335  USA */
+
+#include <windows.h>
+
+static inline int my_atomic_cas32(int32 volatile *a, int32 *cmp, int32 set)
+{
+  int32 initial_cmp= *cmp;
+  int32 initial_a= InterlockedCompareExchange((volatile LONG*)a,
+                                              set, initial_cmp);
+  int ret= (initial_a == initial_cmp);
+  if (!ret)
+    *cmp= initial_a;
+  return ret;
+}
+
+static inline int my_atomic_cas64(int64 volatile *a, int64 *cmp, int64 set)
+{
+  int64 initial_cmp= *cmp;
+  int64 initial_a= InterlockedCompareExchange64((volatile LONGLONG*)a,
+                                                (LONGLONG)set,
+                                                (LONGLONG)initial_cmp);
+  int ret= (initial_a == initial_cmp);
+  if (!ret)
+    *cmp= initial_a;
+  return ret;
+}
+
+static inline int my_atomic_casptr(void * volatile *a, void **cmp, void *set)
+{
+  void *initial_cmp= *cmp;
+  void *initial_a= InterlockedCompareExchangePointer(a, set, initial_cmp);
+  int ret= (initial_a == initial_cmp);
+  if (!ret)
+    *cmp= initial_a;
+  return ret;
+}
+
+static inline int32 my_atomic_add32(int32 volatile *a, int32 v)
+{
+  return (int32)InterlockedExchangeAdd((volatile LONG*)a, v);
+}
+
+static inline int64 my_atomic_add64(int64 volatile *a, int64 v)
+{
+  return (int64)InterlockedExchangeAdd64((volatile LONGLONG*)a, (LONGLONG)v);
+}
+
+
+/*
+  According to MSDN:
+
+  Simple reads and writes to properly-aligned 32-bit variables are atomic
+  operations.
+  ...
+  Simple reads and writes to properly aligned 64-bit variables are atomic on
+  64-bit Windows. Reads and writes to 64-bit values are not guaranteed to be
+  atomic on 32-bit Windows.
+
+  https://msdn.microsoft.com/en-us/library/windows/desktop/ms684122(v=vs.85).aspx
+*/
+
+static inline int32 my_atomic_load32(int32 volatile *a)
+{
+  int32 value= *a;
+  MemoryBarrier();
+  return value;
+}
+
+static inline int64 my_atomic_load64(int64 volatile *a)
+{
+#ifdef _M_X64
+  int64 value= *a;
+  MemoryBarrier();
+  return value;
+#else
+  return (int64) InterlockedCompareExchange64((volatile LONGLONG *) a, 0, 0);
+#endif
+}
+
+static inline void* my_atomic_loadptr(void * volatile *a)
+{
+  void *value= *a;
+  MemoryBarrier();
+  return value;
+}
+
+static inline int32 my_atomic_fas32(int32 volatile *a, int32 v)
+{
+  return (int32)InterlockedExchange((volatile LONG*)a, v);
+}
+
+static inline int64 my_atomic_fas64(int64 volatile *a, int64 v)
+{
+  return (int64)InterlockedExchange64((volatile LONGLONG*)a, v);
+}
+
+static inline void * my_atomic_fasptr(void * volatile *a, void * v)
+{
+  return InterlockedExchangePointer(a, v);
+}
+
+static inline void my_atomic_store32(int32 volatile *a, int32 v)
+{
+  MemoryBarrier();
+  *a= v;
+}
+
+static inline void my_atomic_store64(int64 volatile *a, int64 v)
+{
+#ifdef _M_X64
+  MemoryBarrier();
+  *a= v;
+#else
+  (void) InterlockedExchange64((volatile LONGLONG *) a, v);
+#endif
+}
+
+static inline void my_atomic_storeptr(void * volatile *a, void *v)
+{
+  MemoryBarrier();
+  *a= v;
+}
+
+#endif /* ATOMIC_MSC_INCLUDED */