Provide an iOS message pump for IO implementation.

base/message_pump_libevent_unittest.cc

 // Copyright (c) 2012 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 "base/message_pump_libevent.h"
 
 #include <unistd.h>
 
 #include "base/message_loop.h"
 #include "base/posix/eintr_wrapper.h"
@@ skipping 12 matching lines @@
  protected:
   MessagePumpLibeventTest()
       : ui_loop_(MessageLoop::TYPE_UI),
         io_thread_("MessagePumpLibeventTestIOThread") {}
   virtual ~MessagePumpLibeventTest() {}
 
   virtual void SetUp() OVERRIDE {
     Thread::Options options(MessageLoop::TYPE_IO, 0);
     ASSERT_TRUE(io_thread_.StartWithOptions(options));
     ASSERT_EQ(MessageLoop::TYPE_IO, io_thread_.message_loop()->type());
-    int err = pipe(pipefds_);
-    ASSERT_EQ(0, err);
+    int ret = pipe(pipefds_);
+    ASSERT_EQ(0, ret);
   }
 
   virtual void TearDown() OVERRIDE {
     if (HANDLE_EINTR(close(pipefds_[0])) < 0)
       PLOG(ERROR) << "close";
     if (HANDLE_EINTR(close(pipefds_[1])) < 0)
       PLOG(ERROR) << "close";
   }
 
   MessageLoop* ui_loop() { return &ui_loop_; }
   MessageLoopForIO* io_loop() const {
     return static_cast<MessageLoopForIO*>(io_thread_.message_loop());
   }
 
   void OnLibeventNotification(
       MessagePumpLibevent* pump,
       MessagePumpLibevent::FileDescriptorWatcher* controller) {
     pump->OnLibeventNotification(0, EV_WRITE | EV_READ, controller);
   }
 
   MessageLoop ui_loop_;
   Thread io_thread_;
   int pipefds_[2];

[wtc, 2012/11/29 00:53:21]

Nit: should we also make ui_loop_ and io_thread_ private?
(pipefds_ probably needs to remain protected as in the iOS
version of this file.)

[blundell, 2012/11/29 15:01:04]

Done.

 };
 
 namespace {
 
 // Concrete implementation of MessagePumpLibevent::Watcher that does
 // nothing useful.
 class StupidWatcher : public MessagePumpLibevent::Watcher {
  public:
   virtual ~StupidWatcher() {}
 
@@ skipping 88 matching lines @@
   pump->WatchFileDescriptor(pipefds_[1],
       false, MessagePumpLibevent::WATCH_READ_WRITE, &watcher, &delegate);
 
   // Spoof a libevent notification.
   OnLibeventNotification(pump, &watcher);
 }
 
 }  // namespace
 
 }  // namespace base