Keep only base/extractor.[cc|h].

base/queue_timer.h

-// Copyright 2007-2009 Google Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-// ========================================================================
-//
-// QueueTimer is a wrapper for the kernel queue timer.
-//
-// There are two ways to use the QueueTimer:
-// - alarm, where the timer goes off only once.
-// - periodic timer.
-// When working as an alarm, the timer must be restarted after it fired. There
-// is no need to destroy the whole object.
-// When working with a periodic timer, the timer can only be started once.
-// Alarm timers fire only once, so they will have to be restarted every time.
-// It is easy to deadlock when working with timers. As a general rule, never
-// destroy a QueueTimer from its callback.
-
-#ifndef OMAHA_COMMON_QUEUE_TIMER_H__
-#define OMAHA_COMMON_QUEUE_TIMER_H__
-
-#include <windows.h>
-
-#include "base/basictypes.h"
-
-namespace omaha {
-
-class QueueTimer {
-  public:
-    typedef void (*Callback)(QueueTimer* timer);
-
-    QueueTimer(HANDLE timer_queue,  // Caller provided timer queue.
-               Callback callback,   // Callback to call when the timer fires.
-               void* ctx);          // Caller provided context.
-
-    // The destructor waits for the pending callbacks to finish since we do not
-    // want the callback to fire after the C++ object was destroyed.
-    ~QueueTimer();
-
-    // Starts a timer. The time is in milliseconds.
-    HRESULT Start(int due_time, int period, uint32 flags);
-
-    void* ctx() const { return ctx_; }
-
-    int due_time() const { return due_time_; }
-
-    int period() const { return period_; }
-
-    uint32 flags() const { return flags_; }
-
-  private:
-    static void _stdcall TimerCallback(void* param, BOOLEAN timer_or_wait);
-
-    HRESULT DoStart(int due_time, int period, uint32 flags);
-    void DoCallback();
-
-    CRITICAL_SECTION cs_;         // Serializes access to shared state.
-    CRITICAL_SECTION dtor_cs_;    // Serializes the destruction of the object.
-    DWORD callback_tid_;          // The thread id of the callback, if any.
-    void* ctx_;
-    int due_time_;
-    int period_;
-    uint32 flags_;
-    HANDLE timer_handle_;
-    HANDLE timer_queue_;
-    Callback callback_;
-
-    DISALLOW_EVIL_CONSTRUCTORS(QueueTimer);
-};
-
-}  // namespace omaha
-
-#endif  // OMAHA_COMMON_QUEUE_TIMER_H__
-