EDK: Add Core::DuplicateHandleWithReducedRights().

mojo/edk/system/dispatcher_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "mojo/edk/system/dispatcher.h"
 
 #include <memory>
 #include <thread>
 #include <vector>
 
@@ skipping 123 matching lines @@
   EXPECT_EQ(0u, hss.satisfied_signals);
   EXPECT_EQ(0u, hss.satisfiable_signals);
   hss = HandleSignalsState();
   d->RemoveAwakable(&w, &hss);
   EXPECT_EQ(0u, hss.satisfied_signals);
   EXPECT_EQ(0u, hss.satisfiable_signals);
 }
 
 enum class DispatcherOp {
   CLOSE = 0,
+  DUPLICATE_DISPATCHER,
   WRITE_MESSAGE,
   READ_MESSAGE,
   SET_DATA_PIPE_PRODUCER_OPTIONS,
   GET_DATA_PIPE_PRODUCER_OPTIONS,
   WRITE_DATA,
   BEGIN_WRITE_DATA,
   END_WRITE_DATA,
   SET_DATA_PIPE_CONSUMER_OPTIONS,
   GET_DATA_PIPE_CONSUMER_OPTIONS,
   READ_DATA,
@@ skipping 17 matching lines @@
 
   Waiter waiter;
   waiter.Init();
   switch (op) {
     case DispatcherOp::CLOSE: {
       MojoResult r = dispatcher->Close();
       EXPECT_TRUE(r == MOJO_RESULT_OK || r == MOJO_RESULT_INVALID_ARGUMENT)
           << "Result: " << r;
       break;
     }
+    case DispatcherOp::DUPLICATE_DISPATCHER: {
+      RefPtr<Dispatcher> new_dispatcher;
+      MojoResult r = dispatcher->DuplicateDispatcher(&new_dispatcher);
+      if (r == MOJO_RESULT_OK) {
+        EXPECT_TRUE(new_dispatcher);
+        EXPECT_EQ(MOJO_RESULT_OK, new_dispatcher->Close());
+      } else {
+        EXPECT_EQ(MOJO_RESULT_INVALID_ARGUMENT, r);
+        EXPECT_FALSE(new_dispatcher);
+      }
+      break;
+    }
     case DispatcherOp::WRITE_MESSAGE:
       EXPECT_EQ(MOJO_RESULT_INVALID_ARGUMENT,
                 dispatcher->WriteMessage(NullUserPointer(), 0, nullptr,
                                          MOJO_WRITE_MESSAGE_FLAG_NONE));
       break;
     case DispatcherOp::READ_MESSAGE:
       EXPECT_EQ(
           MOJO_RESULT_INVALID_ARGUMENT,
           dispatcher->ReadMessage(NullUserPointer(), NullUserPointer(), nullptr,
                                   nullptr, MOJO_WRITE_MESSAGE_FLAG_NONE));
@@ skipping 142 matching lines @@
     for (auto& thread : threads)
       thread.join();
 
     EXPECT_EQ(MOJO_RESULT_OK, d->Close());
   }
 }
 
 }  // namespace
 }  // namespace system
 }  // namespace mojo