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
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
/*
* Copyright (C) 2010, 2014 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. ``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
* 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.
*/
#include "config.h"
#include "DisplayRefreshMonitor.h"
#if USE(REQUEST_ANIMATION_FRAME_DISPLAY_MONITOR)
#include "DisplayRefreshMonitorClient.h"
#include "DisplayRefreshMonitorManager.h"
#if PLATFORM(IOS)
#include "DisplayRefreshMonitorIOS.h"
#else
#include "DisplayRefreshMonitorMac.h"
#endif
namespace WebCore {
RefPtr<DisplayRefreshMonitor> DisplayRefreshMonitor::createDefaultDisplayRefreshMonitor(PlatformDisplayID displayID)
{
#if PLATFORM(MAC)
return DisplayRefreshMonitorMac::create(displayID);
#endif
#if PLATFORM(IOS)
return DisplayRefreshMonitorIOS::create(displayID);
#endif
return nullptr;
}
RefPtr<DisplayRefreshMonitor> DisplayRefreshMonitor::create(DisplayRefreshMonitorClient& client)
{
return client.createDisplayRefreshMonitor(client.displayID());
}
DisplayRefreshMonitor::DisplayRefreshMonitor(PlatformDisplayID displayID)
: m_monotonicAnimationStartTime(0)
, m_active(true)
, m_scheduled(false)
, m_previousFrameDone(true)
, m_unscheduledFireCount(0)
, m_displayID(displayID)
, m_clientsToBeNotified(nullptr)
{
}
DisplayRefreshMonitor::~DisplayRefreshMonitor()
{
}
void DisplayRefreshMonitor::handleDisplayRefreshedNotificationOnMainThread(void* data)
{
DisplayRefreshMonitor* monitor = static_cast<DisplayRefreshMonitor*>(data);
monitor->displayDidRefresh();
}
void DisplayRefreshMonitor::addClient(DisplayRefreshMonitorClient& client)
{
m_clients.add(&client);
}
bool DisplayRefreshMonitor::removeClient(DisplayRefreshMonitorClient& client)
{
if (m_clientsToBeNotified)
m_clientsToBeNotified->remove(&client);
return m_clients.remove(&client);
}
void DisplayRefreshMonitor::displayDidRefresh()
{
double monotonicAnimationStartTime;
{
LockHolder lock(m_mutex);
if (!m_scheduled)
++m_unscheduledFireCount;
else
m_unscheduledFireCount = 0;
m_scheduled = false;
monotonicAnimationStartTime = m_monotonicAnimationStartTime;
}
// The call back can cause all our clients to be unregistered, so we need to protect
// against deletion until the end of the method.
Ref<DisplayRefreshMonitor> protect(*this);
// Copy the hash table and remove clients from it one by one so we don't notify
// any client twice, but can respond to removal of clients during the delivery process.
HashSet<DisplayRefreshMonitorClient*> clientsToBeNotified = m_clients;
m_clientsToBeNotified = &clientsToBeNotified;
while (!clientsToBeNotified.isEmpty()) {
DisplayRefreshMonitorClient* client = clientsToBeNotified.takeAny();
client->fireDisplayRefreshIfNeeded(monotonicAnimationStartTime);
// This checks if this function was reentered. In that case, stop iterating
// since it's not safe to use the set any more.
if (m_clientsToBeNotified != &clientsToBeNotified)
break;
}
if (m_clientsToBeNotified == &clientsToBeNotified)
m_clientsToBeNotified = nullptr;
{
LockHolder lock(m_mutex);
m_previousFrameDone = true;
}
DisplayRefreshMonitorManager::sharedManager().displayDidRefresh(*this);
}
}
#endif // USE(REQUEST_ANIMATION_FRAME_DISPLAY_MONITOR)
|
