blob: 2ecdcd819d1f4f7a0207bf7098e08a4896fc3b94 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROMEOS_MEMORY_LOW_MEMORY_LISTENER_H_
#define CHROMEOS_MEMORY_LOW_MEMORY_LISTENER_H_
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "chromeos/memory/chromeos_memory_export.h"
namespace chromeos {
class LowMemoryListenerDelegate;
class LowMemoryListenerImpl;
////////////////////////////////////////////////////////////////////////////////
// LowMemoryListener
//
// Class to handle observation of low memory device for changes so that we
// can get a signal from the kernel about low memory conditions and notify
// our delegate, who can take actions such as discarding tabs.
//
// This object is intended to be created and used on the UI thread. All
// notifications are dispatched on the UI thread.
class CHROMEOS_MEMORY_EXPORT LowMemoryListener {
public:
explicit LowMemoryListener(LowMemoryListenerDelegate* delegate);
~LowMemoryListener();
void Start();
void Stop();
private:
// Callback from LowMemoryListenerImpl when memory is low. Called on the UI
// thread.
void OnMemoryLow();
scoped_refptr<LowMemoryListenerImpl> observer_;
LowMemoryListenerDelegate* delegate_;
base::WeakPtrFactory<LowMemoryListener> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(LowMemoryListener);
};
} // namespace chromeos
#endif // CHROMEOS_MEMORY_LOW_MEMORY_LISTENER_H_
|
