Separates ipc code from common (http://crbug.com/16829)

ipc/ipc_channel_win.h

+// Copyright (c) 2008 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.
+
+#ifndef IPC_IPC_CHANNEL_WIN_H_
+#define IPC_IPC_CHANNEL_WIN_H_
+
+#include "ipc/ipc_channel.h"
+
+#include <queue>
+#include <string>
+
+#include "base/message_loop.h"
+
+class NonThreadSafe;
+
+namespace IPC {
+
+class Channel::ChannelImpl : public MessageLoopForIO::IOHandler {
+ public:
+  // Mirror methods of Channel, see ipc_channel.h for description.
+  ChannelImpl(const std::string& channel_id, Mode mode, Listener* listener);
+  ~ChannelImpl() { Close(); }
+  bool Connect();
+  void Close();
+  void set_listener(Listener* listener) { listener_ = listener; }
+  bool Send(Message* message);
+ private:
+  const std::wstring PipeName(const std::string& channel_id) const;
+  bool CreatePipe(const std::string& channel_id, Mode mode);
+
+  bool ProcessConnection();
+  bool ProcessIncomingMessages(MessageLoopForIO::IOContext* context,
+                               DWORD bytes_read);
+  bool ProcessOutgoingMessages(MessageLoopForIO::IOContext* context,
+                               DWORD bytes_written);
+
+  // MessageLoop::IOHandler implementation.
+  virtual void OnIOCompleted(MessageLoopForIO::IOContext* context,
+                             DWORD bytes_transfered, DWORD error);
+ private:
+  struct State {
+    explicit State(ChannelImpl* channel);
+    ~State();
+    MessageLoopForIO::IOContext context;
+    bool is_pending;
+  };
+
+  State input_state_;
+  State output_state_;
+
+  HANDLE pipe_;
+
+  Listener* listener_;
+
+  // Messages to be sent are queued here.
+  std::queue<Message*> output_queue_;
+
+  // We read from the pipe into this buffer
+  char input_buf_[Channel::kReadBufferSize];
+
+  // Large messages that span multiple pipe buffers, get built-up using
+  // this buffer.
+  std::string input_overflow_buf_;
+
+  // In server-mode, we have to wait for the client to connect before we
+  // can begin reading.  We make use of the input_state_ when performing
+  // the connect operation in overlapped mode.
+  bool waiting_connect_;
+
+  // This flag is set when processing incoming messages.  It is used to
+  // avoid recursing through ProcessIncomingMessages, which could cause
+  // problems.  TODO(darin): make this unnecessary
+  bool processing_incoming_;
+
+  ScopedRunnableMethodFactory<ChannelImpl> factory_;
+
+  scoped_ptr<NonThreadSafe> thread_check_;
+
+  DISALLOW_COPY_AND_ASSIGN(ChannelImpl);
+};
+
+}  // namespace IPC
+
+#endif  // IPC_IPC_CHANNEL_WIN_H_