content/public/renderer/render_view_observer_tracker.h - Issue 2733283002: Require explicit selection of traits for LazyInstance

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

Issue 2733283002: Require explicit selection of traits for LazyInstance (Closed)

Patch Set: Created 3 years, 9 months ago

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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.	1 // Copyright (c) 2012 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> {

(...skipping 35 matching lines...) Expand 10 before \| Expand all \| Expand 10 after Loading...
46 : render_view_(render_view) {	46 : render_view_(render_view) {

47 render_view_map_.Get()[render_view] = this;	47 render_view_map_.Get()[render_view] = this;

48 }	48 }

49 ~RenderViewObserverTracker() {	49 ~RenderViewObserverTracker() {

50 render_view_map_.Get().erase(render_view_);	50 render_view_map_.Get().erase(render_view_);

51 }	51 }

52	52

53 private:	53 private:

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

55	55

56 static base::LazyInstance<	56 static typename base::LazyInstance<

57 std::map<const RenderView, RenderViewObserverTracker<T>>>	57 std::map<const RenderView, RenderViewObserverTracker<T>>>::

58 render_view_map_;	58 DestructorAtExit render_view_map_;

59	59

60 DISALLOW_COPY_AND_ASSIGN(RenderViewObserverTracker<T>);	60 DISALLOW_COPY_AND_ASSIGN(RenderViewObserverTracker<T>);

61 };	61 };

62	62

63 template <class T>	63 template <class T>

64 base::LazyInstance<std::map<const RenderView, RenderViewObserverTracker<T>>>	64 typename base::LazyInstance<

65 RenderViewObserverTracker<T>::render_view_map_ = LAZY_INSTANCE_INITIALIZER;	65 std::map<const RenderView, RenderViewObserverTracker<T>>>::

	66 DestructorAtExit RenderViewObserverTracker<T>::render_view_map_ =

	67 LAZY_INSTANCE_INITIALIZER;

66	68

67 } // namespace content	69 } // namespace content

68	70

69 #endif // CONTENT_PUBLIC_RENDERER_RENDER_VIEW_OBSERVER_TRACKER_H_	71 #endif // CONTENT_PUBLIC_RENDERER_RENDER_VIEW_OBSERVER_TRACKER_H_

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