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
71
|
/*
* Copyright (C) 2017 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <wtf/CrossThreadQueue.h>
#include <wtf/CrossThreadTask.h>
#include <wtf/Lock.h>
#include <wtf/Threading.h>
namespace WTF {
class RegistrationStore;
class SQLiteDatabase;
class CrossThreadTaskHandler {
public:
WTF_EXPORT_PRIVATE virtual ~CrossThreadTaskHandler();
enum class AutodrainedPoolForRunLoop { DoNotUse, Use };
protected:
WTF_EXPORT_PRIVATE CrossThreadTaskHandler(ASCIILiteral threadName, AutodrainedPoolForRunLoop = AutodrainedPoolForRunLoop::DoNotUse);
WTF_EXPORT_PRIVATE void postTask(CrossThreadTask&&);
WTF_EXPORT_PRIVATE void postTaskReply(CrossThreadTask&&);
WTF_EXPORT_PRIVATE void kill();
WTF_EXPORT_PRIVATE void setCompletionCallback(Function<void ()>&&);
private:
void handleTaskRepliesOnMainThread();
void taskRunLoop();
AutodrainedPoolForRunLoop m_useAutodrainedPool { AutodrainedPoolForRunLoop::DoNotUse };
Lock m_taskThreadCreationLock;
Lock m_mainThreadReplyLock;
bool m_mainThreadReplyScheduled WTF_GUARDED_BY_LOCK(m_mainThreadReplyLock) { false };
CrossThreadQueue<CrossThreadTask> m_taskQueue;
CrossThreadQueue<CrossThreadTask> m_taskReplyQueue;
Function<void ()> m_completionCallback;
};
} // namespace WTF
using WTF::CrossThreadTaskHandler;
|
