vendor/llvm/llvm-r72732

1 files changed, 30 insertions, 0 deletions

diff --git a/include/llvm/System/Atomic.h b/include/llvm/System/Atomic.h
new file mode 100644
index 0000000000000..cb9277cc35ec8
--- /dev/null
+++ b/include/llvm/System/Atomic.h
@@ -0,0 +1,30 @@
+//===- llvm/System/Atomic.h - Atomic Operations -----------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares the llvm::sys atomic operations.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SYSTEM_ATOMIC_H
+#define LLVM_SYSTEM_ATOMIC_H
+
+#include "llvm/Support/DataTypes.h"
+
+namespace llvm {
+  namespace sys {
+    void MemoryFence();
+
+    typedef uint32_t cas_flag;
+    cas_flag CompareAndSwap(volatile cas_flag* ptr,
+                            cas_flag new_value,
+                            cas_flag old_value);
+  }
+}
+
+#endif