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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 #include "chrome/browser/low_memory_observer.h" | 5 #include "chrome/browser/low_memory_observer.h" |
6 | 6 |
7 #include <fcntl.h> | 7 #include <fcntl.h> |
8 | 8 |
9 #include "base/bind.h" | 9 #include "base/bind.h" |
| 10 #include "base/chromeos/chromeos_version.h" |
10 #include "base/memory/scoped_ptr.h" | 11 #include "base/memory/scoped_ptr.h" |
11 #include "base/message_loop.h" | 12 #include "base/message_loop.h" |
12 #include "base/time.h" | 13 #include "base/time.h" |
13 #include "base/timer.h" | 14 #include "base/timer.h" |
14 #include "chrome/browser/browser_process.h" | 15 #include "chrome/browser/browser_process.h" |
15 #include "chrome/browser/chromeos/system/runtime_environment.h" | |
16 #include "chrome/browser/oom_priority_manager.h" | 16 #include "chrome/browser/oom_priority_manager.h" |
17 #include "content/public/browser/browser_thread.h" | 17 #include "content/public/browser/browser_thread.h" |
18 | 18 |
19 using content::BrowserThread; | 19 using content::BrowserThread; |
20 | 20 |
21 namespace browser { | 21 namespace browser { |
22 | 22 |
23 namespace { | 23 namespace { |
24 // This is the file that will exist if low memory notification is available | 24 // This is the file that will exist if low memory notification is available |
25 // on the device. Whenever it becomes readable, it signals a low memory | 25 // on the device. Whenever it becomes readable, it signals a low memory |
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108 void LowMemoryObserverImpl::StartObservingOnFileThread() { | 108 void LowMemoryObserverImpl::StartObservingOnFileThread() { |
109 DCHECK_LE(file_descriptor_, 0) | 109 DCHECK_LE(file_descriptor_, 0) |
110 << "Attempted to start observation when it was already started."; | 110 << "Attempted to start observation when it was already started."; |
111 DCHECK(watcher_.get() == NULL); | 111 DCHECK(watcher_.get() == NULL); |
112 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE)); | 112 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE)); |
113 DCHECK(MessageLoopForIO::current()); | 113 DCHECK(MessageLoopForIO::current()); |
114 | 114 |
115 file_descriptor_ = ::open(kLowMemFile, O_RDONLY); | 115 file_descriptor_ = ::open(kLowMemFile, O_RDONLY); |
116 // Don't report this error unless we're really running on ChromeOS | 116 // Don't report this error unless we're really running on ChromeOS |
117 // to avoid testing spam. | 117 // to avoid testing spam. |
118 if (file_descriptor_ < 0 && | 118 if (file_descriptor_ < 0 && base::chromeos::IsRunningOnChromeOS()) { |
119 chromeos::system::runtime_environment::IsRunningOnChromeOS()) { | |
120 PLOG(ERROR) << "Unable to open " << kLowMemFile; | 119 PLOG(ERROR) << "Unable to open " << kLowMemFile; |
121 return; | 120 return; |
122 } | 121 } |
123 watcher_.reset(new MessageLoopForIO::FileDescriptorWatcher); | 122 watcher_.reset(new MessageLoopForIO::FileDescriptorWatcher); |
124 StartWatchingDescriptor(); | 123 StartWatchingDescriptor(); |
125 } | 124 } |
126 | 125 |
127 void LowMemoryObserverImpl::StopObservingOnFileThread() { | 126 void LowMemoryObserverImpl::StopObservingOnFileThread() { |
128 // If StartObserving failed, StopObserving will still get called. | 127 // If StartObserving failed, StopObserving will still get called. |
129 timer_.Stop(); | 128 timer_.Stop(); |
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175 | 174 |
176 void LowMemoryObserver::Stop() { | 175 void LowMemoryObserver::Stop() { |
177 BrowserThread::PostTask( | 176 BrowserThread::PostTask( |
178 BrowserThread::FILE, | 177 BrowserThread::FILE, |
179 FROM_HERE, | 178 FROM_HERE, |
180 base::Bind(&LowMemoryObserverImpl::StopObservingOnFileThread, | 179 base::Bind(&LowMemoryObserverImpl::StopObservingOnFileThread, |
181 observer_.get())); | 180 observer_.get())); |
182 } | 181 } |
183 | 182 |
184 } // namespace browser | 183 } // namespace browser |
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