Make FileBufferNodeWin aware of UWP Win32 API (#319)

Author: an-tao

trantor/net/inner/FileBufferNodeWin.cc

@@ -1,5 +1,11 @@
 #include <trantor/net/inner/BufferNode.h>
 #include <windows.h>
+#include <fileapi.h>
+#if defined(WINAPI_FAMILY) && (WINAPI_FAMILY == WINAPI_FAMILY_APP)
+#define UWP 1
+#else
+#define UWP 0
+#endif
 
 namespace trantor
 {
@@ -9,13 +15,19 @@ class FileBufferNode : public BufferNode
   public:
     FileBufferNode(const wchar_t *fileName, long long offset, long long length)
     {
+#if UWP
+        sendHandle_ = CreateFile2(
+            fileName, GENERIC_READ, FILE_SHARE_READ, OPEN_EXISTING, nullptr);
+
+#else
         sendHandle_ = CreateFileW(fileName,
                                   GENERIC_READ,
                                   FILE_SHARE_READ,
                                   nullptr,
                                   OPEN_EXISTING,
                                   FILE_ATTRIBUTE_NORMAL,
                                   nullptr);
+#endif
         if (sendHandle_ == INVALID_HANDLE_VALUE)
         {
             LOG_SYSERR << fileName << " open error";