- Move to a unified thread model for CEF based on the CEF2 implementation.

- Add the ability to post user-defined tasks for execution on CEF threads (issue #25).
- Update the CEF swap image.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@90 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

libcef/cef_process.h

@@ -0,0 +1,117 @@
+// Copyright (c) 2010 The Chromium Embedded Framework Authors.
+// Portions copyright (c) 2010 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.
+
+// This interface is for managing the global services of the application. Each
+// service is lazily created when requested the first time. The service getters
+// will return NULL if the service is not available, so callers must check for
+// this condition.
+
+#ifndef _CEF_PROCESS_H
+#define _CEF_PROCESS_H
+
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/message_loop.h"
+#include "base/non_thread_safe.h"
+#include "base/ref_counted.h"
+#include "base/scoped_ptr.h"
+#include "ipc/ipc_message.h"
+
+namespace base {
+class Thread;
+class WaitableEvent;
+}
+
+class CefProcessIOThread;
+class CefProcessUIThread;
+class CefMessageLoopForUI;
+
+// NOT THREAD SAFE, call only from the main thread.
+// These functions shouldn't return NULL unless otherwise noted.
+class CefProcess : public base::RefCounted<CefProcess>, public NonThreadSafe {
+ public:
+  CefProcess(bool multi_threaded_message_loop);
+  virtual ~CefProcess();
+
+  // Creates key child threads. We need to do this explicitly since
+  // CefThread::PostTask silently deletes a posted task if the target message
+  // loop isn't created.
+  void CreateChildThreads() {
+    ui_thread();
+    // Create the FILE thread before the IO thread because IO thread
+    // initialization depends on existance of the FILE thread (for cache
+    // support, etc).
+    file_thread();
+    io_thread();
+  }
+
+  CefProcessUIThread* ui_thread() {
+    DCHECK(CalledOnValidThread());
+    if (!created_ui_thread_)
+      CreateUIThread();
+    return ui_thread_.get();
+  }
+
+  // Necessary to perform work on the UI thread if started without a multi
+  // threaded message loop.
+  void DoMessageLoopIteration();
+
+  // Returns the thread that we perform I/O coordination on (network requests,
+  // communication with renderers, etc.
+  // NOTE: You should ONLY use this to pass to IPC or other objects which must
+  // need a MessageLoop*.  If you just want to post a task, use
+  // CefThread::PostTask (or other variants) as they take care of checking
+  // that a thread is still alive, race conditions, lifetime differences etc.
+  // If you still must use this, need to check the return value for NULL.
+  CefProcessIOThread* io_thread() {
+    DCHECK(CalledOnValidThread());
+    if (!created_io_thread_)
+      CreateIOThread();
+    return io_thread_.get();
+  }
+
+  // Returns the thread that we perform random file operations on. For code
+  // that wants to do I/O operations (not network requests or even file: URL
+  // requests), this is the thread to use to avoid blocking the UI thread.
+  // It might be nicer to have a thread pool for this kind of thing.
+  base::Thread* file_thread() {
+    DCHECK(CalledOnValidThread());
+    if (!created_file_thread_)
+      CreateFileThread();
+    return file_thread_.get();
+  }
+
+#if defined(IPC_MESSAGE_LOG_ENABLED)
+  // Enable or disable IPC logging for the browser, all processes
+  // derived from ChildProcess (plugin etc), and all
+  // renderers.
+  void SetIPCLoggingEnabled(bool enable);
+#endif
+
+ private:
+  void CreateUIThread();
+  void CreateIOThread();
+  void CreateFileThread();
+
+  bool multi_threaded_message_loop_;
+
+  bool created_ui_thread_;
+  scoped_ptr<CefProcessUIThread> ui_thread_;
+  scoped_ptr<CefMessageLoopForUI> ui_message_loop_;
+
+  bool created_io_thread_;
+  scoped_ptr<CefProcessIOThread> io_thread_;
+
+  bool created_file_thread_;
+  scoped_ptr<base::Thread> file_thread_;
+
+  DISALLOW_COPY_AND_ASSIGN(CefProcess);
+};
+
+extern CefProcess* g_cef_process;
+
+#endif  // _CEF_PROCESS_H