Move atomic operations' definitions out of line. While this seems kind of silly,
all kinds of problems caused by including windows.h and/or config.h in an LLVM header.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72174 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/System/Atomic.cpp b/lib/System/Atomic.cpp
new file mode 100644
index 0000000..fa8a937
--- /dev/null
+++ b/lib/System/Atomic.cpp
@@ -0,0 +1,52 @@
+//===-- Atomic.cpp - 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 header file implements atomic operations.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/System/Atomic.h"
+#include "llvm/Config/config.h"
+
+using namespace llvm;
+
+#if defined(_MSC_VER)
+#include <windows.h>
+#endif
+
+void sys::MemoryFence() {
+#if LLVM_MULTITHREADED==0
+ return;
+#else
+# if defined(__GNUC__)
+ __sync_synchronize();
+# elif defined(_MSC_VER)
+ MemoryBarrier();
+# else
+# error No memory fence implementation for your platform!
+# endif
+#endif
+}
+
+sys::cas_flag sys::CompareAndSwap(volatile sys::cas_flag* ptr,
+ sys::cas_flag new_value,
+ sys::cas_flag old_value) {
+#if LLVM_MULTITHREADED==0
+ T result = *dest;
+ if (result == c)
+ *dest = exc;
+ return result;
+#elif defined(__GNUC__)
+ return __sync_val_compare_and_swap(ptr, old_value, new_value);
+#elif defined(_MSC_VER)
+ return InterlockedCompareExchange(ptr, new_value, old_value);
+#else
+# error No compare-and-swap implementation for your platform!
+#endif
+}
\ No newline at end of file