1 files changed, 42 insertions, 0 deletions
diff --git a/clang-r353983/include/llvm/Support/Atomic.h b/clang-r353983/include/llvm/Support/Atomic.h
new file mode 100644
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--- /dev/null
+++ b/clang-r353983/include/llvm/Support/Atomic.h
@@ -0,0 +1,42 @@
+//===- llvm/Support/Atomic.h - Atomic Operations -----------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares the llvm::sys atomic operations.
+//
+// DO NOT USE IN NEW CODE!
+//
+// New code should always rely on the std::atomic facilities in C++11.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SUPPORT_ATOMIC_H
+#define LLVM_SUPPORT_ATOMIC_H
+
+#include "llvm/Support/DataTypes.h"
+
+// Windows will at times define MemoryFence.
+#ifdef MemoryFence
+#undef MemoryFence
+#endif
+
+namespace llvm {
+  namespace sys {
+    void MemoryFence();
+
+#ifdef _MSC_VER
+    typedef long cas_flag;
+#else
+    typedef uint32_t cas_flag;
+#endif
+    cas_flag CompareAndSwap(volatile cas_flag* ptr,
+                            cas_flag new_value,
+                            cas_flag old_value);
+  }
+}
+
+#endif