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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "InputTaskManager.h"
#include "VsyncTaskManager.h"
#include "nsRefreshDriver.h"
namespace mozilla {
StaticRefPtr<InputTaskManager> InputTaskManager::gInputTaskManager;
void InputTaskManager::EnableInputEventPrioritization() {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(mInputQueueState == STATE_DISABLED);
mInputQueueState = STATE_ENABLED;
}
void InputTaskManager::FlushInputEventPrioritization() {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(mInputQueueState == STATE_ENABLED ||
mInputQueueState == STATE_SUSPEND);
mInputQueueState =
mInputQueueState == STATE_ENABLED ? STATE_FLUSHING : STATE_SUSPEND;
}
void InputTaskManager::SuspendInputEventPrioritization() {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(mInputQueueState == STATE_ENABLED ||
mInputQueueState == STATE_FLUSHING);
mInputQueueState = STATE_SUSPEND;
}
void InputTaskManager::ResumeInputEventPrioritization() {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(mInputQueueState == STATE_SUSPEND);
mInputQueueState = STATE_ENABLED;
}
int32_t InputTaskManager::GetPriorityModifierForEventLoopTurn(
const MutexAutoLock& aProofOfLock) {
// When the state is disabled, the input task that we have is
// very likely SuspendInputEventQueue, so here we also use
// normal priority as ResumeInputEventQueue, FlushInputEventQueue and
// SetInputEventQueueEnabled all uses normal priority, to
// ensure the ordering is correct.
if (State() == InputTaskManager::STATE_DISABLED) {
return static_cast<int32_t>(EventQueuePriority::Normal) -
static_cast<int32_t>(EventQueuePriority::InputHigh);
}
return GetPriorityModifierForEventLoopTurnForStrictVsyncAlignment();
}
void InputTaskManager::WillRunTask() {
TaskManager::WillRunTask();
mInputPriorityController.WillRunTask();
}
int32_t
InputTaskManager::GetPriorityModifierForEventLoopTurnForStrictVsyncAlignment() {
MOZ_ASSERT(!IsSuspended());
size_t inputCount = PendingTaskCount();
if (inputCount > 0 &&
mInputPriorityController.ShouldUseHighestPriority(this)) {
return static_cast<int32_t>(EventQueuePriority::InputHighest) -
static_cast<int32_t>(EventQueuePriority::InputHigh);
}
if (State() == STATE_FLUSHING ||
nsRefreshDriver::GetNextTickHint().isNothing()) {
return 0;
}
return static_cast<int32_t>(EventQueuePriority::InputLow) -
static_cast<int32_t>(EventQueuePriority::InputHigh);
}
InputTaskManager::InputPriorityController::InputPriorityController()
: mInputVsyncState(InputVsyncState::NoPendingVsync) {}
bool InputTaskManager::InputPriorityController::ShouldUseHighestPriority(
InputTaskManager* aInputTaskManager) {
if (mInputVsyncState == InputVsyncState::HasPendingVsync) {
return true;
}
if (mInputVsyncState == InputVsyncState::RunVsync) {
return false;
}
if (mInputVsyncState == InputVsyncState::NoPendingVsync &&
VsyncTaskManager::Get()->PendingTaskCount()) {
EnterPendingVsyncState(aInputTaskManager->PendingTaskCount());
return true;
}
return false;
}
void InputTaskManager::InputPriorityController::EnterPendingVsyncState(
uint32_t aNumPendingTasks) {
MOZ_ASSERT(mInputVsyncState == InputVsyncState::NoPendingVsync);
mInputVsyncState = InputVsyncState::HasPendingVsync;
mMaxInputTasksToRun = aNumPendingTasks;
mRunInputStartTime = TimeStamp::Now();
}
void InputTaskManager::InputPriorityController::WillRunVsync() {
if (mInputVsyncState == InputVsyncState::RunVsync ||
mInputVsyncState == InputVsyncState::HasPendingVsync) {
LeavePendingVsyncState(false);
}
}
void InputTaskManager::InputPriorityController::LeavePendingVsyncState(
bool aRunVsync) {
if (aRunVsync) {
MOZ_ASSERT(mInputVsyncState == InputVsyncState::HasPendingVsync);
mInputVsyncState = InputVsyncState::RunVsync;
} else {
mInputVsyncState = InputVsyncState::NoPendingVsync;
}
mMaxInputTasksToRun = 0;
}
void InputTaskManager::InputPriorityController::WillRunTask() {
switch (mInputVsyncState) {
case InputVsyncState::NoPendingVsync:
return;
case InputVsyncState::HasPendingVsync:
MOZ_ASSERT(mMaxInputTasksToRun > 0);
--mMaxInputTasksToRun;
if (!mMaxInputTasksToRun ||
TimeStamp::Now() - mRunInputStartTime >=
TimeDuration::FromMilliseconds(
StaticPrefs::dom_input_event_queue_duration_max())) {
LeavePendingVsyncState(true);
}
return;
default:
MOZ_DIAGNOSTIC_ASSERT(
false, "Shouldn't run this input task when we suppose to run vsync");
return;
}
}
// static
void InputTaskManager::Init() { gInputTaskManager = new InputTaskManager(); }
} // namespace mozilla
|
