blob: 7b898ac00dd015d6b8faa0bc0de665bad2346ca6 (
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
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
// Copyright 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 BASE_MEMORY_REF_COUNTED_DELETE_ON_MESSAGE_LOOP_H_
#define BASE_MEMORY_REF_COUNTED_DELETE_ON_MESSAGE_LOOP_H_
#include "base/location.h"
#include "base/logging.h"
#include "base/memory/ref_counted.h"
#include "base/message_loop/message_loop_proxy.h"
namespace base {
// RefCountedDeleteOnMessageLoop is similar to RefCountedThreadSafe, and ensures
// that the object will be deleted on a specified message loop.
//
// Sample usage:
// class Foo : public RefCountedDeleteOnMessageLoop<Foo> {
//
// Foo(const scoped_refptr<MessageLoopProxy>& loop)
// : RefCountedDeleteOnMessageLoop<Foo>(loop) {
// ...
// }
// ...
// private:
// friend class RefCountedDeleteOnMessageLoop<Foo>;
// friend class DeleteHelper<Foo>;
//
// ~Foo();
// };
template <class T>
class RefCountedDeleteOnMessageLoop : public subtle::RefCountedThreadSafeBase {
public:
RefCountedDeleteOnMessageLoop(
const scoped_refptr<MessageLoopProxy>& proxy) : proxy_(proxy) {
DCHECK(proxy_.get());
}
void AddRef() const {
subtle::RefCountedThreadSafeBase::AddRef();
}
void Release() const {
if (subtle::RefCountedThreadSafeBase::Release())
DestructOnMessageLoop();
}
protected:
friend class DeleteHelper<RefCountedDeleteOnMessageLoop>;
~RefCountedDeleteOnMessageLoop() {}
void DestructOnMessageLoop() const {
const T* t = static_cast<const T*>(this);
if (proxy_->BelongsToCurrentThread())
delete t;
else
proxy_->DeleteSoon(FROM_HERE, t);
}
scoped_refptr<MessageLoopProxy> proxy_;
private:
DISALLOW_COPY_AND_ASSIGN(RefCountedDeleteOnMessageLoop);
};
} // namespace base
#endif // BASE_MEMORY_REF_COUNTED_DELETE_ON_MESSAGE_LOOP_H_
|
