Add chrome to the repository.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@15 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 145 insertions, 0 deletions

diff --git a/chrome/renderer/render_thread.h b/chrome/renderer/render_thread.h
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+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef CHROME_RENDERER_RENDER_THREAD_H__
+#define CHROME_RENDERER_RENDER_THREAD_H__
+
+#include "base/ref_counted.h"
+#include "base/shared_memory.h"
+#include "base/task.h"
+#include "base/thread.h"
+#include "base/thread_local_storage.h"
+#include "chrome/common/ipc_sync_channel.h"
+#include "chrome/common/message_router.h"
+
+class SkBitmap;
+class Task;
+class VisitedLinkSlave;
+struct WebPreferences;
+class RenderDnsMaster;
+
+// 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 IPC::Channel::Listener,
+                     public IPC::Message::Sender,
+                     public Thread {
+ public:
+  RenderThread(const std::wstring& channel_name);
+  ~RenderThread();
+
+  // IPC::Channel::Listener implementation:
+  virtual void OnMessageReceived(const IPC::Message& msg);
+  virtual void OnChannelError();
+
+  // IPC::Message::Sender implementation:
+  virtual bool Send(IPC::Message* msg);
+
+  void AddFilter(IPC::ChannelProxy::MessageFilter* filter);
+  void RemoveFilter(IPC::ChannelProxy::MessageFilter* filter);
+
+  // The RenderThread instance for the current thread.
+  static RenderThread* current() {
+    return static_cast<RenderThread*>(ThreadLocalStorage::Get(tls_index_));
+  }
+
+  VisitedLinkSlave* visited_link_slave() const { return visited_link_slave_; }
+
+  // Do DNS prefetch resolution of a hostname.
+  void Resolve(const char* name, size_t length);
+
+  // See documentation on MessageRouter for AddRoute and RemoveRoute
+  void AddRoute(int32 routing_id, IPC::Channel::Listener* listener);
+  void RemoveRoute(int32 routing_id);
+
+  // Invokes InformHostOfCacheStats after a short delay.  Used to move this
+  // bookkeeping operation off the critical latency path.
+  void InformHostOfCacheStatsLater();
+
+  MessageLoop* owner_loop() { return owner_loop_; }
+
+  // Indicates if RenderThread::Send() is on the call stack.
+  bool in_send() const { return in_send_ != 0; }
+
+ protected:
+  // Called by the thread base class
+  virtual void Init();
+  virtual void CleanUp();
+
+ private:
+  void OnUpdateVisitedLinks(SharedMemoryHandle table);
+
+  void OnSetNextPageID(int32 next_page_id);
+  void OnCreateNewView(HWND parent_hwnd,
+                       HANDLE 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();
+
+  // 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();
+
+  static DWORD tls_index_;
+
+  // The message loop used to run tasks on the thread that started this thread.
+  MessageLoop* owner_loop_;
+
+  // Used only on the background render thread to implement message routing
+  // functionality to the consumers of the RenderThread.
+  MessageRouter router_;
+
+  std::wstring channel_name_;
+  scoped_ptr<IPC::SyncChannel> channel_;
+
+  // These objects live solely on the render thread.
+  VisitedLinkSlave* visited_link_slave_;
+
+  scoped_ptr<RenderDnsMaster> render_dns_master_;
+
+  scoped_ptr<ScopedRunnableMethodFactory<RenderThread> > cache_stats_factory_;
+
+  int in_send_;
+
+  DISALLOW_EVIL_CONSTRUCTORS(RenderThread);
+};
+
+#endif  // CHROME_RENDERER_RENDER_THREAD_H__