blob: 358d6fa5072550e3562e26b00fbb9e878492955a [file] [log] [blame]
// Copyright (c) 2011 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_
#pragma once
#include "ipc/ipc_channel.h"
#include <queue>
#include <string>
#include "base/memory/scoped_ptr.h"
#include "base/message_loop.h"
namespace base {
class NonThreadSafe;
}
namespace IPC {
class Channel::ChannelImpl : public MessageLoopForIO::IOHandler {
public:
// Mirror methods of Channel, see ipc_channel.h for description.
ChannelImpl(const IPC::ChannelHandle &channel_handle, Mode mode,
Listener* listener);
~ChannelImpl();
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 IPC::ChannelHandle &channel_handle, 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<base::NonThreadSafe> thread_check_;
DISALLOW_COPY_AND_ASSIGN(ChannelImpl);
};
} // namespace IPC
#endif // IPC_IPC_CHANNEL_WIN_H_