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// Copyright (c) 2009 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 CHROME_BROWSER_WORKER_HOST_WORKER_PROCESS_HOST_H_
#define CHROME_BROWSER_WORKER_HOST_WORKER_PROCESS_HOST_H_
#include <list>
#include "base/basictypes.h"
#include "base/task.h"
#include "chrome/common/child_process_host.h"
#include "googleurl/src/gurl.h"
#include "ipc/ipc_channel.h"
class WorkerProcessHost : public ChildProcessHost {
public:
// Contains information about each worker instance, needed to forward messages
// between the renderer and worker processes.
struct WorkerInstance {
GURL url;
int renderer_id;
int render_view_route_id;
int worker_route_id;
IPC::Message::Sender* sender;
int sender_id;
int sender_route_id;
};
WorkerProcessHost(ResourceDispatcherHost* resource_dispatcher_host_);
~WorkerProcessHost();
// Starts the process. Returns true iff it succeeded.
bool Init();
// Creates a worker object in the process.
void CreateWorker(const WorkerInstance& instance);
// Returns true iff the given message from a renderer process was forwarded to
// the worker.
bool FilterMessage(const IPC::Message& message, int sender_pid);
void SenderShutdown(IPC::Message::Sender* sender);
protected:
friend class WorkerService;
typedef std::list<WorkerInstance> Instances;
const Instances& instances() const { return instances_; }
private:
// ResourceDispatcherHost::Receiver implementation:
virtual URLRequestContext* GetRequestContext(
uint32 request_id,
const ViewHostMsg_Resource_Request& request_data);
// Called when a message arrives from the worker process.
void OnMessageReceived(const IPC::Message& message);
// Given a Sender, returns the callback that generates a new routing id.
static CallbackWithReturnValue<int>::Type* GetNextRouteIdCallback(
IPC::Message::Sender* sender);
// Relays a message to the given endpoint. Takes care of parsing the message
// if it contains a message port and sending it a valid route id.
static void RelayMessage(const IPC::Message& message,
IPC::Message::Sender* sender,
int route_id,
CallbackWithReturnValue<int>::Type* next_route_id);
virtual bool CanShutdown() { return instances_.empty(); }
// Updates the title shown in the task manager.
void UpdateTitle();
void OnCreateDedicatedWorker(const GURL& url,
int render_view_route_id,
int* route_id);
void OnCancelCreateDedicatedWorker(int route_id);
void OnForwardToWorker(const IPC::Message& message);
Instances instances_;
// A callback to create a routing id for the associated worker process.
scoped_ptr<CallbackWithReturnValue<int>::Type> next_route_id_callback_;
DISALLOW_COPY_AND_ASSIGN(WorkerProcessHost);
};
#endif // CHROME_BROWSER_WORKER_HOST_WORKER_PROCESS_HOST_H_
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