1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef CONTENT_PUBLIC_RENDERER_RENDER_THREAD_H_
6 #define CONTENT_PUBLIC_RENDERER_RENDER_THREAD_H_
8 #include "base/basictypes.h"
9 #include "base/callback.h"
10 #include "base/memory/shared_memory.h"
11 #include "base/metrics/user_metrics_action.h"
12 #include "content/common/content_export.h"
13 #include "ipc/ipc_channel_proxy.h"
14 #include "ipc/ipc_sender.h"
24 class MessageLoopProxy;
30 class SyncMessageFilter;
39 class RenderProcessObserver;
40 class ResourceDispatcherDelegate;
42 class CONTENT_EXPORT RenderThread : public IPC::Sender {
44 // Returns the one render thread for this process. Note that this can only
45 // be accessed when running on the render thread itself.
46 static RenderThread* Get();
49 virtual ~RenderThread();
51 virtual base::MessageLoop* GetMessageLoop() = 0;
52 virtual IPC::SyncChannel* GetChannel() = 0;
53 virtual std::string GetLocale() = 0;
54 virtual IPC::SyncMessageFilter* GetSyncMessageFilter() = 0;
55 virtual scoped_refptr<base::MessageLoopProxy> GetIOMessageLoopProxy() = 0;
57 // Called to add or remove a listener for a particular message routing ID.
58 // These methods normally get delegated to a MessageRouter.
59 virtual void AddRoute(int32 routing_id, IPC::Listener* listener) = 0;
60 virtual void RemoveRoute(int32 routing_id) = 0;
61 virtual int GenerateRoutingID() = 0;
63 // These map to IPC::ChannelProxy methods.
64 virtual void AddFilter(IPC::ChannelProxy::MessageFilter* filter) = 0;
65 virtual void RemoveFilter(IPC::ChannelProxy::MessageFilter* filter) = 0;
67 // Add/remove observers for the process.
68 virtual void AddObserver(RenderProcessObserver* observer) = 0;
69 virtual void RemoveObserver(RenderProcessObserver* observer) = 0;
71 // Set the ResourceDispatcher delegate object for this process.
72 virtual void SetResourceDispatcherDelegate(
73 ResourceDispatcherDelegate* delegate) = 0;
75 // We initialize WebKit as late as possible. Call this to force
77 virtual void EnsureWebKitInitialized() = 0;
79 // Sends over a base::UserMetricsAction to be recorded by user metrics as
80 // an action. Once a new user metric is added, run
81 // tools/metrics/actions/extract_actions.py
82 // to add the metric to actions.xml, then update the <owner>s and
83 // <description> sections. Make sure to include the actions.xml file when you
84 // upload your code for review!
86 // WARNING: When using base::UserMetricsAction, base::UserMetricsAction
87 // and a string literal parameter must be on the same line, e.g.
88 // RenderThread::Get()->RecordAction(
89 // base::UserMetricsAction("my extremely long action name"));
90 // because otherwise our processing scripts won't pick up on new actions.
91 virtual void RecordAction(const base::UserMetricsAction& action) = 0;
93 // Sends over a string to be recorded by user metrics as a computed action.
94 // When you use this you need to also update the rules for extracting known
95 // actions in chrome/tools/extract_actions.py.
96 virtual void RecordComputedAction(const std::string& action) = 0;
98 // Asks the host to create a block of shared memory for the renderer.
99 // The shared memory allocated by the host is returned back.
100 virtual scoped_ptr<base::SharedMemory> HostAllocateSharedMemoryBuffer(
101 size_t buffer_size) = 0;
103 // Registers the given V8 extension with WebKit.
104 virtual void RegisterExtension(v8::Extension* extension) = 0;
106 // Schedule a call to IdleHandler with the given initial delay.
107 virtual void ScheduleIdleHandler(int64 initial_delay_ms) = 0;
109 // A task we invoke periodically to assist with idle cleanup.
110 virtual void IdleHandler() = 0;
112 // Get/Set the delay for how often the idle handler is called.
113 virtual int64 GetIdleNotificationDelayInMs() const = 0;
114 virtual void SetIdleNotificationDelayInMs(
115 int64 idle_notification_delay_in_ms) = 0;
117 virtual void UpdateHistograms(int sequence_number) = 0;
119 // Post task to all worker threads. Returns number of workers.
120 virtual int PostTaskToAllWebWorkers(const base::Closure& closure) = 0;
122 // Resolve the proxy servers to use for a given url. On success true is
123 // returned and |proxy_list| is set to a PAC string containing a list of
125 virtual bool ResolveProxy(const GURL& url, std::string* proxy_list) = 0;
127 // Gets the shutdown event for the process.
128 virtual base::WaitableEvent* GetShutdownEvent() = 0;
131 // Request that the given font be loaded by the browser so it's cached by the
132 // OS. Please see ChildProcessHost::PreCacheFont for details.
133 virtual void PreCacheFont(const LOGFONT& log_font) = 0;
135 // Release cached font.
136 virtual void ReleaseCachedFonts() = 0;
140 } // namespace content
142 #endif // CONTENT_PUBLIC_RENDERER_RENDER_THREAD_H_