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
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
/*
* Copyright (C) 2014 Igalia S.L.
*
* 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
#if USE(COORDINATED_GRAPHICS)
#include <wtf/Atomics.h>
#include <wtf/Condition.h>
#include <wtf/FastMalloc.h>
#include <wtf/Function.h>
#include <wtf/Lock.h>
#include <wtf/NeverDestroyed.h>
#include <wtf/Noncopyable.h>
#include <wtf/RunLoop.h>
namespace WebKit {
class CompositingRunLoop {
WTF_MAKE_NONCOPYABLE(CompositingRunLoop);
WTF_MAKE_FAST_ALLOCATED;
public:
CompositingRunLoop(Function<void ()>&&);
~CompositingRunLoop();
bool isCurrent() const;
void performTask(Function<void ()>&&);
void performTaskSync(Function<void ()>&&);
void suspend();
void resume();
Lock& stateLock() { return m_state.lock; }
void scheduleUpdate();
void stopUpdates();
void updateCompleted(LockHolder&);
RunLoop& runLoop() const { return m_runLoop.get(); }
private:
enum class UpdateState {
Idle,
Scheduled,
InProgress,
};
void scheduleUpdate(LockHolder&);
void updateTimerFired();
Ref<RunLoop> m_runLoop;
RunLoop::Timer m_updateTimer;
Function<void ()> m_updateFunction;
Lock m_dispatchSyncConditionLock;
Condition m_dispatchSyncCondition;
struct {
Lock lock;
UpdateState update { UpdateState::Idle };
bool pendingUpdate { false };
bool isSuspended { false };
} m_state;
};
} // namespace WebKit
#endif // USE(COORDINATED_GRAPHICS)
|
