OLD | NEW |
| (Empty) |
1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "chrome/browser/power_save_blocker.h" | |
6 #include "content/browser/browser_thread.h" | |
7 | |
8 // Accessed only from the UI thread. | |
9 int PowerSaveBlocker::blocker_count_ = 0; | |
10 | |
11 PowerSaveBlocker::PowerSaveBlocker(bool enable) : enabled_(false) { | |
12 if (enable) | |
13 Enable(); | |
14 } | |
15 | |
16 PowerSaveBlocker::~PowerSaveBlocker(void) { | |
17 Disable(); | |
18 } | |
19 | |
20 void PowerSaveBlocker::Enable() { | |
21 if (enabled_) | |
22 return; | |
23 | |
24 enabled_ = true; | |
25 PostAdjustBlockCount(1); | |
26 } | |
27 | |
28 void PowerSaveBlocker::Disable() { | |
29 if (!enabled_) | |
30 return; | |
31 | |
32 enabled_ = false; | |
33 PostAdjustBlockCount(-1); | |
34 } | |
35 | |
36 | |
37 void PowerSaveBlocker::PostAdjustBlockCount(int delta) { | |
38 BrowserThread::PostTask( | |
39 BrowserThread::UI, FROM_HERE, | |
40 NewRunnableFunction(&PowerSaveBlocker::AdjustBlockCount, delta)); | |
41 } | |
42 | |
43 // Called only from UI thread. | |
44 void PowerSaveBlocker::AdjustBlockCount(int delta) { | |
45 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); | |
46 | |
47 bool was_blocking = (blocker_count_ != 0); | |
48 | |
49 blocker_count_ += delta; | |
50 | |
51 bool is_blocking = (blocker_count_ != 0); | |
52 | |
53 DCHECK_GE(blocker_count_, 0); | |
54 | |
55 if (is_blocking != was_blocking) | |
56 ApplyBlock(is_blocking); | |
57 } | |
OLD | NEW |