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
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "DecodePool.h"
#include <algorithm>
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/Monitor.h"
#include "mozilla/SchedulerGroup.h"
#include "mozilla/Services.h"
#include "mozilla/StaticPrefs_image.h"
#include "mozilla/TaskController.h"
#include "mozilla/TimeStamp.h"
#include "nsCOMPtr.h"
#include "nsIObserverService.h"
#include "nsThreadManager.h"
#include "nsThreadUtils.h"
#include "nsXPCOMCIDInternal.h"
#include "prsystem.h"
#include "Decoder.h"
#include "GeckoProfiler.h"
#include "IDecodingTask.h"
#include "RasterImage.h"
#if defined(XP_WIN)
# include <objbase.h>
#endif
using std::max;
using std::min;
namespace mozilla {
namespace image {
///////////////////////////////////////////////////////////////////////////////
// DecodePool implementation.
///////////////////////////////////////////////////////////////////////////////
/* static */
StaticRefPtr<DecodePool> DecodePool::sSingleton;
/* static */
uint32_t DecodePool::sNumCores = 0;
NS_IMPL_ISUPPORTS(DecodePool, nsIObserver)
/* static */
void DecodePool::Initialize() {
MOZ_ASSERT(NS_IsMainThread());
sNumCores = max<int32_t>(PR_GetNumberOfProcessors(), 1);
DecodePool::Singleton();
}
/* static */
DecodePool* DecodePool::Singleton() {
if (!sSingleton) {
MOZ_ASSERT(NS_IsMainThread());
sSingleton = new DecodePool();
ClearOnShutdown(&sSingleton);
}
return sSingleton;
}
/* static */
uint32_t DecodePool::NumberOfCores() { return sNumCores; }
#if defined(XP_WIN)
class IOThreadIniter final : public Runnable {
public:
explicit IOThreadIniter() : Runnable("image::IOThreadIniter") {}
NS_IMETHOD Run() override {
MOZ_ASSERT(!NS_IsMainThread());
CoInitialize(nullptr);
return NS_OK;
}
};
#endif
DecodePool::DecodePool() : mMutex("image::IOThread") {
// Initialize the I/O thread.
#if defined(XP_WIN)
// On Windows we use the io thread to get icons from the system. Any thread
// that makes system calls needs to call CoInitialize. And these system calls
// (SHGetFileInfo) should only be called from one thread at a time, in case
// we ever create more than on io thread.
nsCOMPtr<nsIRunnable> initer = new IOThreadIniter();
nsresult rv = NS_NewNamedThread("ImageIO", getter_AddRefs(mIOThread), initer);
#else
nsresult rv = NS_NewNamedThread("ImageIO", getter_AddRefs(mIOThread));
#endif
MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv) && mIOThread,
"Should successfully create image I/O thread");
nsCOMPtr<nsIObserverService> obsSvc = services::GetObserverService();
if (obsSvc) {
obsSvc->AddObserver(this, "xpcom-shutdown-threads", false);
}
}
DecodePool::~DecodePool() {
MOZ_ASSERT(NS_IsMainThread(), "Must shut down DecodePool on main thread!");
}
NS_IMETHODIMP
DecodePool::Observe(nsISupports*, const char* aTopic, const char16_t*) {
MOZ_ASSERT(strcmp(aTopic, "xpcom-shutdown-threads") == 0, "Unexpected topic");
mShuttingDown = true;
nsCOMPtr<nsIThread> ioThread;
{
MutexAutoLock lock(mMutex);
ioThread.swap(mIOThread);
}
if (ioThread) {
ioThread->Shutdown();
}
return NS_OK;
}
bool DecodePool::IsShuttingDown() const { return mShuttingDown; }
class DecodingTask final : public Task {
public:
explicit DecodingTask(RefPtr<IDecodingTask>&& aTask)
: Task(false, aTask->Priority() == TaskPriority::eLow
? EventQueuePriority::Normal
: EventQueuePriority::MediumHigh),
mTask(aTask) {}
bool Run() override {
mTask->Run();
return true;
}
private:
RefPtr<IDecodingTask> mTask;
};
void DecodePool::AsyncRun(IDecodingTask* aTask) {
MOZ_ASSERT(aTask);
TaskController::Get()->AddTask(
MakeAndAddRef<DecodingTask>((RefPtr<IDecodingTask>(aTask))));
}
bool DecodePool::SyncRunIfPreferred(IDecodingTask* aTask,
const nsCString& aURI) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aTask);
AUTO_PROFILER_LABEL_DYNAMIC_NSCSTRING("DecodePool::SyncRunIfPreferred",
GRAPHICS, aURI);
if (aTask->ShouldPreferSyncRun()) {
aTask->Run();
return true;
}
AsyncRun(aTask);
return false;
}
void DecodePool::SyncRunIfPossible(IDecodingTask* aTask,
const nsCString& aURI) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aTask);
AUTO_PROFILER_LABEL_DYNAMIC_NSCSTRING("DecodePool::SyncRunIfPossible",
GRAPHICS, aURI);
aTask->Run();
}
already_AddRefed<nsIEventTarget> DecodePool::GetIOEventTarget() {
MutexAutoLock threadPoolLock(mMutex);
nsCOMPtr<nsIEventTarget> target = mIOThread;
return target.forget();
}
} // namespace image
} // namespace mozilla
|
