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1 // Copyright 2017 The Chromium Authors. All rights reserved. | 1 // Copyright 2017 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 #ifndef CONTENT_COMMON_MAC_APP_NAP_ACTIVITY_H | 5 #ifndef CONTENT_COMMON_MAC_APP_NAP_ACTIVITY_H |
6 #define CONTENT_COMMON_MAC_APP_NAP_ACTIVITY_H | 6 #define CONTENT_COMMON_MAC_APP_NAP_ACTIVITY_H |
7 | 7 |
8 #include <memory> | 8 #include <memory> |
9 | 9 |
10 #include "base/macros.h" | 10 #include "base/macros.h" |
11 #include "content/common/content_export.h" | 11 #include "content/common/content_export.h" |
12 | 12 |
13 namespace content { | 13 namespace content { |
14 | 14 |
15 // Can't import scoped_nsobject here, so wrap it. | 15 // Can't import scoped_nsobject here, so wrap it. |
16 struct AssertionWrapper; | 16 struct AssertionWrapper; |
17 | 17 |
18 // A wrapper around the macOS "activity" system, which is required to | 18 // A wrapper around the macOS "activity" system, which is required to |
19 // make renderers eligible for AppNap. | 19 // make renderers eligible for AppNap. |
20 // | 20 // |
21 // When doing work, processes are expected to begin an activity, receiving | 21 // When doing work, processes are expected to begin an activity, receiving |
22 // an opaque token called an "assertion". On finishing, they end the activity. | 22 // an opaque token called an "assertion". On finishing, they end the activity. |
23 // When a process has no outstanding assertions, it becomes eligible for | 23 // When a process has no outstanding assertions, it becomes eligible for |
24 // AppNap. | 24 // AppNap. |
25 class CONTENT_EXPORT AppNapActivity { | 25 class CONTENT_EXPORT AppNapActivity { |
26 public: | 26 public: |
27 AppNapActivity(); | 27 AppNapActivity(); |
28 ~AppNapActivity(); | 28 ~AppNapActivity(); |
29 | 29 |
| 30 // Because there's no NSApplication in renderers, do some housekeeping |
| 31 // to become eligible for App Nap. |
| 32 static void InitializeAppNapSupport(); |
| 33 |
30 // Begin an activity and store the provided token. | 34 // Begin an activity and store the provided token. |
31 void Begin(); | 35 void Begin(); |
32 | 36 |
33 // End the activity represented by |assertion_|. | 37 // End the activity represented by |assertion_|. |
34 void End(); | 38 void End(); |
35 | 39 |
36 private: | 40 private: |
37 // An opaque token provided by the OS on beginning an activity. | 41 // An opaque token provided by the OS on beginning an activity. |
38 std::unique_ptr<AssertionWrapper> assertion_; | 42 std::unique_ptr<AssertionWrapper> assertion_; |
39 | 43 |
40 DISALLOW_COPY_AND_ASSIGN(AppNapActivity); | 44 DISALLOW_COPY_AND_ASSIGN(AppNapActivity); |
41 }; | 45 }; |
42 | 46 |
43 } // namespace content | 47 } // namespace content |
44 | 48 |
45 #endif // CONTENT_COMMON_MAC_APP_NAP_ACTIVITY_H | 49 #endif // CONTENT_COMMON_MAC_APP_NAP_ACTIVITY_H |
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