libretro: Re-enable hw context switch, add auto option

src/common/CMakeLists.txt

@@ -49,6 +49,7 @@ add_library(common
   jit_code_buffer.h
   log.cpp
   log.h
+  make_array.h
   md5_digest.cpp
   md5_digest.h
   minizip_helpers.cpp

src/common/common.vcxproj

@@ -66,6 +66,7 @@
     <ClInclude Include="iso_reader.h" />
     <ClInclude Include="jit_code_buffer.h" />
     <ClInclude Include="log.h" />
+    <ClInclude Include="make_array.h" />
     <ClInclude Include="md5_digest.h" />
     <ClInclude Include="null_audio_stream.h" />
     <ClInclude Include="progress_callback.h" />

src/common/common.vcxproj.filters

@@ -101,6 +101,7 @@
     <ClInclude Include="image.h" />
     <ClInclude Include="minizip_helpers.h" />
     <ClInclude Include="win32_progress_callback.h" />
+    <ClInclude Include="make_array.h" />
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="jit_code_buffer.cpp" />
@@ -210,4 +211,4 @@
       <UniqueIdentifier>{642ff5eb-af39-4aab-a42f-6eb8188a11d7}</UniqueIdentifier>
     </Filter>
   </ItemGroup>
-</Project>
+</Project>

src/common/make_array.h

@@ -0,0 +1,12 @@
+#pragma once
+#include <array>
+#include <type_traits>
+
+// Source: https://gist.github.com/klmr/2775736#file-make_array-hpp
+
+template<typename... T>
+constexpr auto make_array(T&&... values)
+  -> std::array<typename std::decay<typename std::common_type<T...>::type>::type, sizeof...(T)>
+{
+  return {std::forward<T>(values)...};
+}