Implemented initial version of server-issued notification client.

chrome/browser/sync/notifier/chrome_system_resources.h

+// 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.
+//
+// Simple system resources class that uses the current message loop
+// for scheduling.  Assumes the current message loop is already
+// running.
+
+#ifndef CHROME_BROWSER_SYNC_NOTIFIER_CHROME_SYSTEM_RESOURCES_H_
+#define CHROME_BROWSER_SYNC_NOTIFIER_CHROME_SYSTEM_RESOURCES_H_
+
+#include "google/cacheinvalidation/invalidation-client.h"
+
+namespace sync_notifier {
+
+// TODO(akalin): Add a NonThreadSafe member to this class and use it.
+
+class ChromeSystemResources : public invalidation::SystemResources {
+ public:
+  ChromeSystemResources();
+
+  ~ChromeSystemResources();
+
+  virtual invalidation::Time current_time();
+
+  virtual void StartScheduler();
+
+  // We assume that the current message loop is stopped shortly after
+  // this is called, i.e. that any in-flight delayed tasks won't get
+  // run.
+  //
+  // TODO(akalin): Make sure that the above actually holds.  Use a
+  // ScopedRunnableMethodFactory for better safety.
+  virtual void StopScheduler();
+
+  virtual void ScheduleWithDelay(invalidation::TimeDelta delay,
+                                 invalidation::Closure* task);
+
+  virtual void ScheduleImmediately(invalidation::Closure* task);
+
+  virtual void Log(LogLevel level, const char* file, int line,
+                   const char* format, ...);
+
+ private:
+  bool scheduler_active_;
+};
+
+}  // namespace sync_notifier
+
+#endif  // CHROME_BROWSER_SYNC_NOTIFIER_CHROME_SYSTEM_RESOURCES_H_