Make std* blocking file-descriptors.

runtime/bin/socket_win.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_WINDOWS)
 
 #include "bin/builtin.h"
 #include "bin/eventhandler.h"
 #include "bin/file.h"
@@ skipping 177 matching lines @@
   switch (GetFileType(handle->handle())) {
     case FILE_TYPE_CHAR: return File::kTerminal;
     case FILE_TYPE_PIPE: return File::kPipe;
     case FILE_TYPE_DISK: return File::kFile;
     default: return GetLastError == NO_ERROR ? File::kOther : -1;
   }
 }
 
 
 intptr_t Socket::GetStdioHandle(intptr_t num) {
-  HANDLE handle;
-  switch (num) {
-    case 0:
-      handle = GetStdHandle(STD_INPUT_HANDLE);
-      break;
-    case 1:
-      handle = GetStdHandle(STD_OUTPUT_HANDLE);
-      break;
-    case 2:
-      handle = GetStdHandle(STD_ERROR_HANDLE);
-      break;
-    default: UNREACHABLE();
-  }
+  if (num != 0) return -1;
+  HANDLE handle = GetStdHandle(STD_INPUT_HANDLE);
   if (handle == INVALID_HANDLE_VALUE) {
     return -1;
   }
   StdHandle* std_handle = new StdHandle(handle);
-  if (std_handle == NULL) return -1;
   std_handle->MarkDoesNotSupportOverlappedIO();
   std_handle->EnsureInitialized(EventHandler::delegate());
   return reinterpret_cast<intptr_t>(std_handle);
 }
 
 
 intptr_t ServerSocket::Accept(intptr_t fd) {
   ListenSocket* listen_socket = reinterpret_cast<ListenSocket*>(fd);
   ClientSocket* client_socket = listen_socket->Accept();
   if (client_socket != NULL) {
@@ skipping 422 matching lines @@
                     proto,
                     MCAST_LEAVE_GROUP,
                     reinterpret_cast<char *>(&mreq),
                     sizeof(mreq)) == 0;
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_WINDOWS)