1 files changed, 75 insertions, 0 deletions
diff --git a/chrome/browser/message_window.h b/chrome/browser/message_window.h
new file mode 100644
index 0000000..1d0d732
--- /dev/null
+++ b/chrome/browser/message_window.h
@@ -0,0 +1,75 @@
+// 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_MESSAGE_WINDOW_H_
+#define CHROME_BROWSER_MESSAGE_WINDOW_H_
+
+#include <string>
+#include <windows.h>
+
+#include "base/basictypes.h"
+
+// MessageWindow -------------------------------------------------------------
+//
+// Class for dealing with the invisible global message window for IPC. This
+// window allows different browser processes to communicate with each other.
+// It is named according to the user data directory, so we can be sure that
+// no more than one copy of the application can be running at once with a
+// given data directory.
+
+class MessageWindow {
+ public:
+  explicit MessageWindow(const std::wstring& user_data_dir);
+  ~MessageWindow();
+
+  // Returns true if another process was found and notified, false if we
+  // should continue with this process. Roughly based on Mozilla
+  //
+  // TODO(brettw): this will not handle all cases. If two process start up too
+  // close to each other, the window might not have been created yet for the
+  // first one, so this function won't find it.
+  bool NotifyOtherProcess();
+
+  // Create the toplevel message window for IPC.
+  void Create();
+
+  // Blocks the dispatch of CopyData messages.
+  void Lock() {
+    locked_ = true;
+  }
+
+  // Allows the dispatch of CopyData messages.
+  void Unlock() {
+    locked_ = false;
+  }
+
+  // This ugly behemoth handles startup commands sent from another process.
+  LRESULT OnCopyData(HWND hwnd, const COPYDATASTRUCT* cds);
+
+  // Looks for zombie renderer and plugin processes that could have survived.
+  void HuntForZombieChromeProcesses();
+
+ private:
+  LRESULT CALLBACK WndProc(HWND hwnd,
+                           UINT message,
+                           WPARAM wparam,
+                           LPARAM lparam);
+
+  static LRESULT CALLBACK WndProcStatic(HWND hwnd,
+                                        UINT message,
+                                        WPARAM wparam,
+                                        LPARAM lparam) {
+    MessageWindow* msg_wnd = reinterpret_cast<MessageWindow*>(
+        GetWindowLongPtr(hwnd, GWLP_USERDATA));
+    return msg_wnd->WndProc(hwnd, message, wparam, lparam);
+  }
+
+  HWND remote_window_;  // The HWND_MESSAGE of another browser.
+  HWND window_;  // The HWND_MESSAGE window.
+  bool locked_;
+
+  DISALLOW_COPY_AND_ASSIGN(MessageWindow);
+};
+
+#endif  // #ifndef CHROME_BROWSER_MESSAGE_WINDOW_H_