1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
// Copyright (c) 2006-2008 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 CHROME_RENDERER_RENDER_THREAD_H_
#define CHROME_RENDERER_RENDER_THREAD_H_
#include <vector>
#include "base/gfx/native_widget_types.h"
#include "base/shared_memory.h"
#include "base/task.h"
#include "build/build_config.h"
#include "chrome/common/child_thread.h"
#include "chrome/renderer/renderer_histogram_snapshots.h"
class FilePath;
class NotificationService;
class RenderDnsMaster;
class RendererHistogram;
class RendererWebKitClientImpl;
class SkBitmap;
class UserScriptSlave;
class VisitedLinkSlave;
struct ModalDialogEvent;
struct WebPreferences;
// The RenderThreadBase is the minimal interface that a RenderView/Widget
// expects from a render thread. The interface basically abstracts a way to send
// and receive messages.
class RenderThreadBase {
public:
virtual ~RenderThreadBase() {}
virtual bool Send(IPC::Message* msg) = 0;
// Called to add or remove a listener for a particular message routing ID.
// These methods normally get delegated to a MessageRouter.
virtual void AddRoute(int32 routing_id, IPC::Channel::Listener* listener) = 0;
virtual void RemoveRoute(int32 routing_id) = 0;
virtual void AddFilter(IPC::ChannelProxy::MessageFilter* filter) = 0;
virtual void RemoveFilter(IPC::ChannelProxy::MessageFilter* filter) = 0;
};
// The RenderThread class represents a background thread where RenderView
// instances live. The RenderThread supports an API that is used by its
// consumer to talk indirectly to the RenderViews and supporting objects.
// Likewise, it provides an API for the RenderViews to talk back to the main
// process (i.e., their corresponding WebContents).
//
// Most of the communication occurs in the form of IPC messages. They are
// routed to the RenderThread according to the routing IDs of the messages.
// The routing IDs correspond to RenderView instances.
class RenderThread : public RenderThreadBase,
public ChildThread {
public:
// Grabs the IPC channel name from the command line.
RenderThread();
// Constructor that's used when running in single process mode.
RenderThread(const std::wstring& channel_name);
virtual ~RenderThread();
// Returns the one render thread for this process. Note that this should only
// be accessed when running on the render thread itself
static RenderThread* current();
// Overridded from RenderThreadBase.
virtual bool Send(IPC::Message* msg) {
return ChildThread::Send(msg);
}
virtual void AddRoute(int32 routing_id, IPC::Channel::Listener* listener) {
return ChildThread::AddRoute(routing_id, listener);
}
virtual void RemoveRoute(int32 routing_id) {
return ChildThread::RemoveRoute(routing_id);
}
virtual void AddFilter(IPC::ChannelProxy::MessageFilter* filter);
virtual void RemoveFilter(IPC::ChannelProxy::MessageFilter* filter);
VisitedLinkSlave* visited_link_slave() const {
return visited_link_slave_.get();
}
UserScriptSlave* user_script_slave() const {
return user_script_slave_.get();
}
// Do DNS prefetch resolution of a hostname.
void Resolve(const char* name, size_t length);
// Send all the Histogram data to browser.
void SendHistograms();
// Invokes InformHostOfCacheStats after a short delay. Used to move this
// bookkeeping operation off the critical latency path.
void InformHostOfCacheStatsLater();
private:
virtual void OnControlMessageReceived(const IPC::Message& msg);
// Called by the thread base class
virtual void Init();
virtual void CleanUp();
void OnUpdateVisitedLinks(base::SharedMemoryHandle table);
void OnUpdateUserScripts(base::SharedMemoryHandle table);
void OnPluginMessage(const FilePath& plugin_path,
const std::vector<uint8>& data);
void OnSetNextPageID(int32 next_page_id);
void OnCreateNewView(gfx::NativeViewId parent_hwnd,
ModalDialogEvent modal_dialog_event,
const WebPreferences& webkit_prefs,
int32 view_id);
void OnTransferBitmap(const SkBitmap& bitmap, int resource_id);
void OnSetCacheCapacities(size_t min_dead_capacity,
size_t max_dead_capacity,
size_t capacity);
void OnGetCacheResourceStats();
// Send all histograms to browser.
void OnGetRendererHistograms();
// Gather usage statistics from the in-memory cache and inform our host.
// These functions should be call periodically so that the host can make
// decisions about how to allocation resources using current information.
void InformHostOfCacheStats();
// These objects live solely on the render thread.
scoped_ptr<VisitedLinkSlave> visited_link_slave_;
scoped_ptr<UserScriptSlave> user_script_slave_;
scoped_ptr<RenderDnsMaster> dns_master_;
scoped_ptr<RendererHistogramSnapshots> histogram_snapshots_;
scoped_ptr<ScopedRunnableMethodFactory<RenderThread> > cache_stats_factory_;
scoped_ptr<NotificationService> notification_service_;
scoped_ptr<RendererWebKitClientImpl> webkit_client_impl_;
DISALLOW_COPY_AND_ASSIGN(RenderThread);
};
#endif // CHROME_RENDERER_RENDER_THREAD_H_
|
