Making AsyncInvoker destructor thread-safe.

webrtc/base/event.h

 /*
  *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #ifndef WEBRTC_BASE_EVENT_H__
 #define WEBRTC_BASE_EVENT_H__
 
+#include "webrtc/base/constructormagic.h"
 #if defined(WEBRTC_WIN)
 #include "webrtc/base/win32.h"  // NOLINT: consider this a system header.
 #elif defined(WEBRTC_POSIX)
 #include <pthread.h>
 #else
 #error "Must define either WEBRTC_WIN or WEBRTC_POSIX."
 #endif
 
 namespace rtc {
 
@@ skipping 13 matching lines @@
 
  private:
 #if defined(WEBRTC_WIN)
   HANDLE event_handle_;
 #elif defined(WEBRTC_POSIX)
   pthread_mutex_t event_mutex_;
   pthread_cond_t event_cond_;
   const bool is_manual_reset_;
   bool event_status_;
 #endif
+
+  RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(Event);
 };
 
 }  // namespace rtc
 
 #endif  // WEBRTC_BASE_EVENT_H__