blob: d817b9763b71eaf8f428b227dc13940147368605 (
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
|
// Copyright (c) 2012 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 PPAPI_SHARED_IMPL_PPAPI_MESSAGE_TRACKER_H_
#define PPAPI_SHARED_IMPL_PPAPI_MESSAGE_TRACKER_H_
#include "base/basictypes.h"
#include "base/synchronization/lock.h"
#include "ppapi/shared_impl/ppapi_shared_export.h"
template <typename T> struct DefaultSingletonTraits;
namespace ppapi {
// PpapiMessageTracker uses a counter to record whether anyone is sending or
// receiving pepper messages in the current process.
// This class is thread safe.
class PPAPI_SHARED_EXPORT PpapiMessageTracker {
public:
static PpapiMessageTracker* GetInstance();
void EnterMessageHandling();
void ExitMessageHandling();
bool IsHandlingMessage();
private:
friend struct DefaultSingletonTraits<PpapiMessageTracker>;
PpapiMessageTracker();
~PpapiMessageTracker();
base::Lock lock_;
int enter_count_;
DISALLOW_COPY_AND_ASSIGN(PpapiMessageTracker);
};
class PPAPI_SHARED_EXPORT ScopedTrackPpapiMessage {
public:
ScopedTrackPpapiMessage();
~ScopedTrackPpapiMessage();
private:
DISALLOW_COPY_AND_ASSIGN(ScopedTrackPpapiMessage);
};
} // namespace ppapi
#endif // PPAPI_SHARED_IMPL_PPAPI_MESSAGE_TRACKER_H_
|
