Widevine MediaCas client code that works with Android R

wvutil/include/util_common.h

@@ -0,0 +1,22 @@
+// Copyright 2018 Google LLC. All Rights Reserved. This file and proprietary
+// source code may only be used and distributed under the Widevine Master
+// License Agreement.
+
+#ifndef WV_UTIL_UTIL_COMMON_H_
+#define WV_UTIL_UTIL_COMMON_H_
+
+#ifdef _WIN32
+#  ifdef CORE_UTIL_IMPLEMENTATION
+#    define CORE_UTIL_EXPORT __declspec(dllexport)
+#  else
+#    define CORE_UTIL_EXPORT __declspec(dllimport)
+#  endif
+#else
+#  ifdef CORE_UTIL_IMPLEMENTATION
+#    define CORE_UTIL_EXPORT __attribute__((visibility("default")))
+#  else
+#    define CORE_UTIL_EXPORT
+#  endif
+#endif
+
+#endif  // WV_UTIL_UTIL_COMMON_H_