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
72
73
74
75
76
77
|
/*
* Copyright (C) 2023 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 "RunLoopObserver.h"
#include <wtf/MonotonicTime.h>
#include <wtf/RefCounted.h>
#include <wtf/WeakPtr.h>
namespace WebCore {
class Page;
class OpportunisticTaskScheduler;
class OpportunisticTaskDeferralScope {
WTF_MAKE_NONCOPYABLE(OpportunisticTaskDeferralScope); WTF_MAKE_FAST_ALLOCATED;
public:
OpportunisticTaskDeferralScope(OpportunisticTaskScheduler&);
OpportunisticTaskDeferralScope(OpportunisticTaskDeferralScope&&);
~OpportunisticTaskDeferralScope();
private:
WeakPtr<OpportunisticTaskScheduler> m_scheduler;
};
class OpportunisticTaskScheduler : public RefCounted<OpportunisticTaskScheduler>, public CanMakeWeakPtr<OpportunisticTaskScheduler> {
public:
static Ref<OpportunisticTaskScheduler> create(Page& page)
{
return adoptRef(*new OpportunisticTaskScheduler(page));
}
~OpportunisticTaskScheduler();
void reschedule(MonotonicTime deadline);
WARN_UNUSED_RETURN std::unique_ptr<OpportunisticTaskDeferralScope> makeDeferralScope();
private:
friend class OpportunisticTaskDeferralScope;
OpportunisticTaskScheduler(Page&);
void runLoopObserverFired();
void incrementDeferralCount();
void decrementDeferralCount();
WeakPtr<Page> m_page;
uint64_t m_taskDeferralCount { 0 };
MonotonicTime m_currentDeadline;
std::unique_ptr<RunLoopObserver> m_runLoopObserver;
};
} // namespace WebCore
|
