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// 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.
#ifndef CONTENT_BROWSER_MESSAGE_PORT_SERVICE_H_
#define CONTENT_BROWSER_MESSAGE_PORT_SERVICE_H_
#include <map>
#include <utility>
#include <vector>
#include "base/basictypes.h"
#include "base/memory/singleton.h"
#include "base/strings/string16.h"
#include "ipc/ipc_message.h"
namespace content {
class MessagePortMessageFilter;
class MessagePortService {
public:
typedef std::vector<std::pair<base::string16, std::vector<int> > >
QueuedMessages;
// Returns the MessagePortService singleton.
static MessagePortService* GetInstance();
// These methods correspond to the message port related IPCs.
void Create(int route_id,
MessagePortMessageFilter* filter,
int* message_port_id);
void Destroy(int message_port_id);
void Entangle(int local_message_port_id, int remote_message_port_id);
void PostMessage(int sender_message_port_id,
const base::string16& message,
const std::vector<int>& sent_message_port_ids);
void QueueMessages(int message_port_id);
void SendQueuedMessages(int message_port_id,
const QueuedMessages& queued_messages);
// Updates the information needed to reach a message port when it's sent to a
// (possibly different) process.
void UpdateMessagePort(
int message_port_id,
MessagePortMessageFilter* filter,
int routing_id);
void OnMessagePortMessageFilterClosing(MessagePortMessageFilter* filter);
// Attempts to send the queued messages for a message port.
void SendQueuedMessagesIfPossible(int message_port_id);
private:
friend struct DefaultSingletonTraits<MessagePortService>;
MessagePortService();
~MessagePortService();
void PostMessageTo(int message_port_id,
const base::string16& message,
const std::vector<int>& sent_message_port_ids);
// Handles the details of removing a message port id. Before calling this,
// verify that the message port id exists.
void Erase(int message_port_id);
struct MessagePort;
typedef std::map<int, MessagePort> MessagePorts;
MessagePorts message_ports_;
// We need globally unique identifiers for each message port.
int next_message_port_id_;
DISALLOW_COPY_AND_ASSIGN(MessagePortService);
};
} // namespace content
#endif // CONTENT_BROWSER_MESSAGE_PORT_SERVICE_H_
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