content/public/renderer/render_view_observer_tracker.h - Issue 8491043: Allow linker initialization of lazy instance

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Side by Side Diff: content/public/renderer/render_view_observer_tracker.h

Issue 8491043: Allow linker initialization of lazy instance (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src

Patch Set: willchan comments + rebase Created 9 years, 1 month ago

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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.	1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.

2 // Use of this source code is governed by a BSD-style license that can be	2 // Use of this source code is governed by a BSD-style license that can be

3 // found in the LICENSE file.	3 // found in the LICENSE file.

4	4

5 // Helper class used to find the RenderViewObservers for a given RenderView.	5 // Helper class used to find the RenderViewObservers for a given RenderView.

6 //	6 //

7 // Example usage:	7 // Example usage:

8 //	8 //

9 // class MyRVO : public RenderViewObserver,	9 // class MyRVO : public RenderViewObserver,

10 // public RenderViewObserverTracker<MyRVO> {	10 // public RenderViewObserverTracker<MyRVO> {

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54 const RenderView* render_view_;	54 const RenderView* render_view_;

55	55

56 static base::LazyInstance<std::map<const RenderView, T> >	56 static base::LazyInstance<std::map<const RenderView, T> >

57 render_view_map_;	57 render_view_map_;

58	58

59 DISALLOW_COPY_AND_ASSIGN(RenderViewObserverTracker<T>);	59 DISALLOW_COPY_AND_ASSIGN(RenderViewObserverTracker<T>);

60 };	60 };

61	61

62 template <class T>	62 template <class T>

63 base::LazyInstance<std::map<const RenderView, T> >	63 base::LazyInstance<std::map<const RenderView, T> >

64 RenderViewObserverTracker<T>::render_view_map_(base::LINKER_INITIALIZED);	64 RenderViewObserverTracker<T>::render_view_map_ = LAZY_INSTANCE_INITIALIZER;

65	65

66 } // namespace content	66 } // namespace content

67	67

68 #endif // CONTENT_PUBLIC_RENDERER_RENDER_VIEW_OBSERVER_TRACKER_H_	68 #endif // CONTENT_PUBLIC_RENDERER_RENDER_VIEW_OBSERVER_TRACKER_H_

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