Attachment 342126 Details for Bug 174569 – Patch

[patch] Patch

bug-174569-20180607153633.patch (text/plain), 25.31 KB, created by Yusuke Suzuki on 2018-06-06 23:36:34 PDT

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Creator: Yusuke Suzuki

Created: 2018-06-06 23:36:34 PDT

Size: 25.31 KB

patch

obsolete

>Subversion Revision: 232574
>diff --git a/Source/WTF/ChangeLog b/Source/WTF/ChangeLog
>index 05db42447c58fa0bf37e7a8e514eaff731767a85..49c585d23bf6028a73dd9885fbb3df74a88b4eae 100644
>--- a/Source/WTF/ChangeLog
>+++ b/Source/WTF/ChangeLog
>@@ -1,3 +1,26 @@
>+2018-06-06  Yusuke Suzuki  <utatane.tea@gmail.com>
>+
>+        [WTF] Add WorkerPool
>+        https://bugs.webkit.org/show_bug.cgi?id=174569
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * WTF.xcodeproj/project.pbxproj:
>+        * wtf/AutomaticThread.cpp:
>+        (WTF::AutomaticThread::AutomaticThread):
>+        (WTF::AutomaticThread::start):
>+        * wtf/AutomaticThread.h:
>+        * wtf/CMakeLists.txt:
>+        * wtf/WorkerPool.cpp: Added.
>+        (WTF::WorkerPool::Worker::Worker):
>+        (WTF::WorkerPool::Worker::threadIsStopping):
>+        (WTF::WorkerPool::WorkerPool):
>+        (WTF::WorkerPool::~WorkerPool):
>+        (WTF::WorkerPool::shouldSleep):
>+        (WTF::WorkerPool::postTask):
>+        * wtf/WorkerPool.h: Added.
>+        (WTF::WorkerPool::create):
>+
> 2018-06-05  Darin Adler  <darin@apple.com>
> 
>         [Cocoa] Retire DispatchPtr, and add more move semantics and simpler #ifs to other smart pointers
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index c27e6b45d67d7e440f531184f5f62fab7492d17d..f787955c4b842bc219aecd2d197d27e3eea879b2 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1,3 +1,17 @@
>+2018-06-06  Yusuke Suzuki  <utatane.tea@gmail.com>
>+
>+        [WTF] Add WorkerPool
>+        https://bugs.webkit.org/show_bug.cgi?id=174569
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * platform/graphics/nicosia/NicosiaPaintingEngineThreaded.cpp:
>+        (Nicosia::PaintingEngineThreaded::PaintingEngineThreaded):
>+        (Nicosia::PaintingEngineThreaded::~PaintingEngineThreaded):
>+        (Nicosia::PaintingEngineThreaded::paint):
>+        (Nicosia::s_threadFunc): Deleted.
>+        * platform/graphics/nicosia/NicosiaPaintingEngineThreaded.h:
>+
> 2018-06-06  Youenn Fablet  <youenn@apple.com>
> 
>         HTTP Header values validation is too strict
>diff --git a/Source/WTF/WTF.xcodeproj/project.pbxproj b/Source/WTF/WTF.xcodeproj/project.pbxproj
>index 862c7ccbc2f08e0c6ee8ee20728156eddef7d3ff..3b04b708b0f33efdcbb4d6548c7f21ab4cda4942 100644
>--- a/Source/WTF/WTF.xcodeproj/project.pbxproj
>+++ b/Source/WTF/WTF.xcodeproj/project.pbxproj
>@@ -145,6 +145,7 @@
> 		DCEE22011CEA7551000C2396 /* BlockObjCExceptions.mm in Sources */ = {isa = PBXBuildFile; fileRef = DCEE21FD1CEA7551000C2396 /* BlockObjCExceptions.mm */; };
> 		E15556F518A0CC18006F48FB /* CryptographicUtilities.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E15556F318A0CC18006F48FB /* CryptographicUtilities.cpp */; };
> 		E311FB171F0A568B003C08DE /* ThreadGroup.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E311FB151F0A568B003C08DE /* ThreadGroup.cpp */; };
>+		E388886F20C9095100E632BC /* WorkerPool.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E388886D20C9095100E632BC /* WorkerPool.cpp */; };
> 		E38C41251EB4E04C0042957D /* CPUTimeCocoa.mm in Sources */ = {isa = PBXBuildFile; fileRef = E38C41241EB4E04C0042957D /* CPUTimeCocoa.mm */; };
> 		E38C41281EB4E0680042957D /* CPUTime.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E38C41261EB4E0680042957D /* CPUTime.cpp */; };
> 		E38D6E271F5522E300A75CC4 /* StringBuilderJSON.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E38D6E261F5522E300A75CC4 /* StringBuilderJSON.cpp */; };
>@@ -614,6 +615,8 @@
> 		E311FB161F0A568B003C08DE /* ThreadGroup.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ThreadGroup.h; sourceTree = "<group>"; };
> 		E3200AB41E9A536D003B59D2 /* PlatformRegisters.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = PlatformRegisters.h; sourceTree = "<group>"; };
> 		E33D5F871FBED66700BF625E /* RecursableLambda.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = RecursableLambda.h; sourceTree = "<group>"; };
>+		E388886D20C9095100E632BC /* WorkerPool.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = WorkerPool.cpp; sourceTree = "<group>"; };
>+		E388886E20C9095100E632BC /* WorkerPool.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WorkerPool.h; sourceTree = "<group>"; };
> 		E38C41241EB4E04C0042957D /* CPUTimeCocoa.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = CPUTimeCocoa.mm; sourceTree = "<group>"; };
> 		E38C41261EB4E0680042957D /* CPUTime.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = CPUTime.cpp; sourceTree = "<group>"; };
> 		E38C41271EB4E0680042957D /* CPUTime.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CPUTime.h; sourceTree = "<group>"; };
>@@ -1122,6 +1125,8 @@
> 				0F3501631BB258C800F0A2A3 /* WeakRandom.h */,
> 				0FE4479A1B7AAA03009498EB /* WordLock.cpp */,
> 				0FE4479B1B7AAA03009498EB /* WordLock.h */,
>+				E388886D20C9095100E632BC /* WorkerPool.cpp */,
>+				E388886E20C9095100E632BC /* WorkerPool.h */,
> 				E4A0AD371A96245500536DF6 /* WorkQueue.cpp */,
> 				E4A0AD381A96245500536DF6 /* WorkQueue.h */,
> 				FE05FAFE1FE5007500093230 /* WTFAssertions.cpp */,
>@@ -1554,6 +1559,7 @@
> 				0F66B2921DC97BAB004A1D3F /* WallTime.cpp in Sources */,
> 				1FA47C8A152502DA00568D1B /* WebCoreThread.cpp in Sources */,
> 				0FE4479C1B7AAA03009498EB /* WordLock.cpp in Sources */,
>+				E388886F20C9095100E632BC /* WorkerPool.cpp in Sources */,
> 				E4A0AD391A96245500536DF6 /* WorkQueue.cpp in Sources */,
> 				E4A0AD3D1A96253C00536DF6 /* WorkQueueCocoa.cpp in Sources */,
> 				FE05FAFF1FE5007500093230 /* WTFAssertions.cpp in Sources */,
>diff --git a/Source/WTF/wtf/AutomaticThread.cpp b/Source/WTF/wtf/AutomaticThread.cpp
>index 2c486c4808aae32858dd2b2264484726aa9a99b9..a59c5d1bc969240d8c7addccc2cbb471e9e70187 100644
>--- a/Source/WTF/wtf/AutomaticThread.cpp
>+++ b/Source/WTF/wtf/AutomaticThread.cpp
>@@ -104,9 +104,10 @@ bool AutomaticThreadCondition::contains(const AbstractLocker&, AutomaticThread*
>     return m_threads.contains(thread);
> }
> 
>-AutomaticThread::AutomaticThread(const AbstractLocker& locker, Box<Lock> lock, RefPtr<AutomaticThreadCondition> condition)
>+AutomaticThread::AutomaticThread(const AbstractLocker& locker, Box<Lock> lock, RefPtr<AutomaticThreadCondition> condition, Seconds timeout)
>     : m_lock(lock)
>     , m_condition(condition)
>+    , m_timeout(timeout)
> {
>     if (verbose)
>         dataLog(RawPointer(this), ": Allocated AutomaticThread.\n");
>@@ -204,10 +205,10 @@ void AutomaticThread::start(const AbstractLocker&)
>                         // Shut the thread down after a timeout.
>                         m_isWaiting = true;
>                         bool awokenByNotify =
>-                            m_waitCondition.waitFor(*m_lock, 10_s);
>+                            m_waitCondition.waitFor(*m_lock, m_timeout);
>                         if (verbose && !awokenByNotify && !m_isWaiting)
>                             dataLog(RawPointer(this), ": waitFor timed out, but notified via m_isWaiting flag!\n");
>-                        if (m_isWaiting) {
>+                        if (m_isWaiting && shouldSleep(locker)) {
>                             m_isWaiting = false;
>                             if (verbose)
>                                 dataLog(RawPointer(this), ": Going to sleep!\n");
>diff --git a/Source/WTF/wtf/AutomaticThread.h b/Source/WTF/wtf/AutomaticThread.h
>index 1b904540c7f6046b0752afe975d22a3b4a2c8b8a..ff54f31741be78fd3a52ce4247671874b2cd6dc9 100644
>--- a/Source/WTF/wtf/AutomaticThread.h
>+++ b/Source/WTF/wtf/AutomaticThread.h
>@@ -129,7 +129,7 @@ class WTF_EXPORT_PRIVATE AutomaticThread : public ThreadSafeRefCounted<Automatic
> protected:
>     // This logically creates the thread, but in reality the thread won't be created until someone
>     // calls AutomaticThreadCondition::notifyOne() or notifyAll().
>-    AutomaticThread(const AbstractLocker&, Box<Lock>, RefPtr<AutomaticThreadCondition>);
>+    AutomaticThread(const AbstractLocker&, Box<Lock>, RefPtr<AutomaticThreadCondition>, Seconds timeout = 10_s);
>     
>     // To understand PollResult and WorkResult, imagine that poll() and work() are being called like
>     // so:
>@@ -168,6 +168,11 @@ class WTF_EXPORT_PRIVATE AutomaticThread : public ThreadSafeRefCounted<Automatic
>     // can be sure that the default ones don't do anything (so you don't need a super call).
>     virtual void threadDidStart();
>     virtual void threadIsStopping(const AbstractLocker&);
>+
>+    // Control whether this automatic thread should sleep when timeout happens.
>+    // By overriding this function, we can customize how automatic threads will sleep.
>+    // For example, when you have thread pool, you can decrease active threads moderately.
>+    virtual bool shouldSleep(const AbstractLocker&) { return true; }
>     
> private:
>     friend class AutomaticThreadCondition;
>@@ -181,6 +186,7 @@ class WTF_EXPORT_PRIVATE AutomaticThread : public ThreadSafeRefCounted<Automatic
>     bool m_hasUnderlyingThread { false };
>     Condition m_waitCondition;
>     Condition m_isRunningCondition;
>+    Seconds m_timeout;
> };
> 
> } // namespace WTF
>diff --git a/Source/WTF/wtf/CMakeLists.txt b/Source/WTF/wtf/CMakeLists.txt
>index 6ce617a7b4dca4048b57a26286361d4577333b3a..0f9f4e1f2da16c312c0dd52d8dbe953b554d344d 100644
>--- a/Source/WTF/wtf/CMakeLists.txt
>+++ b/Source/WTF/wtf/CMakeLists.txt
>@@ -256,6 +256,7 @@ set(WTF_PUBLIC_HEADERS
>     WindowsExtras.h
>     WordLock.h
>     WorkQueue.h
>+    WorkerPool.h
>     dtoa.h
> 
>     dtoa/bignum-dtoa.h
>@@ -390,6 +391,7 @@ set(WTF_SOURCES
>     WallTime.cpp
>     WordLock.cpp
>     WorkQueue.cpp
>+    WorkerPool.cpp
>     dtoa.cpp
> 
>     dtoa/bignum-dtoa.cc
>diff --git a/Source/WTF/wtf/WorkerPool.cpp b/Source/WTF/wtf/WorkerPool.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..55a236e4f26cf9aeee8b2bdf250e4a60fa53ce4d
>--- /dev/null
>+++ b/Source/WTF/wtf/WorkerPool.cpp
>@@ -0,0 +1,124 @@
>+/*
>+ * Copyright (C) 2017 Yusuke Suzuki <utatane.tea@gmail.com>.
>+ *
>+ * 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 "WorkerPool.h"
>+
>+#include <wtf/NeverDestroyed.h>
>+
>+namespace WTF {
>+
>+class WorkerPool::Worker : public AutomaticThread {
>+public:
>+    friend class WorkerPool;
>+
>+    Worker(const AbstractLocker& locker, WorkerPool& pool, Box<Lock> lock, RefPtr<AutomaticThreadCondition> condition, Seconds timeout)
>+        : AutomaticThread(locker, lock, condition, timeout)
>+        , m_pool(pool)
>+    {
>+    }
>+
>+    PollResult poll(const AbstractLocker&) override
>+    {
>+        if (m_pool.m_tasks.isEmpty())
>+            return PollResult::Wait;
>+        m_task = m_pool.m_tasks.takeFirst();
>+        if (!m_task)
>+            return PollResult::Stop;
>+        return PollResult::Work;
>+    }
>+
>+    WorkResult work() override
>+    {
>+        m_task();
>+        m_task = nullptr;
>+        return WorkResult::Continue;
>+    }
>+
>+    void threadDidStart() override
>+    {
>+        LockHolder locker(*m_pool.m_lock);
>+        m_pool.m_numberOfActiveWorkers++;
>+    }
>+
>+    virtual void threadIsStopping(const AbstractLocker&)
>+    {
>+        m_pool.m_numberOfActiveWorkers--;
>+    }
>+
>+    bool shouldSleep(const AbstractLocker& locker) override
>+    {
>+        return m_pool.shouldSleep(locker);
>+    }
>+
>+private:
>+    WorkerPool& m_pool;
>+    Function<void()> m_task;
>+};
>+
>+WorkerPool::WorkerPool(unsigned numberOfWorkers, Seconds timeout)
>+    : m_lock(Box<Lock>::create())
>+    , m_condition(AutomaticThreadCondition::create())
>+    , m_timeout(timeout)
>+{
>+    LockHolder locker(*m_lock);
>+    for (unsigned i = 0; i < numberOfWorkers; ++i)
>+        m_workers.append(adoptRef(*new Worker(locker, *this, m_lock, m_condition, timeout)));
>+}
>+
>+WorkerPool::~WorkerPool()
>+{
>+    {
>+        LockHolder locker(*m_lock);
>+        for (unsigned i = m_workers.size(); i--;)
>+            m_tasks.append(nullptr); // Use null task to indicate that we want the thread to terminate.
>+        m_condition->notifyAll(locker);
>+    }
>+    for (auto& worker : m_workers)
>+        worker->join();
>+    ASSERT(!m_numberOfActiveWorkers);
>+}
>+
>+bool WorkerPool::shouldSleep(const AbstractLocker&)
>+{
>+    if (m_timeout > 0_s && std::isinf(m_timeout))
>+        return false;
>+
>+    MonotonicTime currentTime = MonotonicTime::now();
>+    if (std::isnan(m_lastTimeoutTime) || (currentTime >= (m_lastTimeoutTime  + m_timeout))) {
>+        m_lastTimeoutTime = currentTime;
>+        return true;
>+    }
>+    return false;
>+}
>+
>+void WorkerPool::postTask(Function<void()> task)
>+{
>+    LockHolder locker(*m_lock);
>+    m_tasks.append(WTFMove(task));
>+    m_condition->notifyOne(locker);
>+}
>+
>+}
>diff --git a/Source/WTF/wtf/WorkerPool.h b/Source/WTF/wtf/WorkerPool.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..d0ed82cb4bd150050710bb3704948f69be18a075
>--- /dev/null
>+++ b/Source/WTF/wtf/WorkerPool.h
>@@ -0,0 +1,68 @@
>+/*
>+ * Copyright (C) 2017 Yusuke Suzuki <utatane.tea@gmail.com>.
>+ *
>+ * 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.
>+ */
>+
>+#pragma once
>+
>+#include <wtf/AutomaticThread.h>
>+#include <wtf/Deque.h>
>+#include <wtf/Function.h>
>+#include <wtf/NumberOfCores.h>
>+#include <wtf/Vector.h>
>+
>+namespace WTF {
>+
>+class WorkerPool : public ThreadSafeRefCounted<WorkerPool> {
>+public:
>+    ~WorkerPool();
>+
>+    void postTask(Function<void()>);
>+
>+    // If timeout is infinity, it means AutomaticThread will be never automatically destroyed.
>+    static Ref<WorkerPool> create(unsigned numberOfWorkers  = WTF::numberOfProcessorCores(), Seconds timeout = Seconds::infinity())
>+    {
>+        ASSERT(numberOfWorkers >= 1);
>+        return adoptRef(*new WorkerPool(numberOfWorkers, timeout));
>+    }
>+
>+private:
>+    class Worker;
>+    friend class Worker;
>+
>+    WorkerPool(unsigned numberOfWorkers, Seconds timeout);
>+
>+    bool shouldSleep(const AbstractLocker&);
>+
>+    Box<Lock> m_lock;
>+    RefPtr<AutomaticThreadCondition> m_condition;
>+    Seconds m_timeout;
>+    MonotonicTime m_lastTimeoutTime { MonotonicTime::nan() };
>+    unsigned m_numberOfActiveWorkers { 0 };
>+    Vector<Ref<Worker>> m_workers;
>+    Deque<Function<void()>> m_tasks;
>+};
>+
>+}
>+
>+using WTF::WorkerPool;
>diff --git a/Source/WebCore/platform/graphics/nicosia/NicosiaPaintingEngineThreaded.cpp b/Source/WebCore/platform/graphics/nicosia/NicosiaPaintingEngineThreaded.cpp
>index 64617ff30aad444836555a0aa604fd01a7a2179b..565d9201b9da99a22a20b07aa91ea410ce992458 100644
>--- a/Source/WebCore/platform/graphics/nicosia/NicosiaPaintingEngineThreaded.cpp
>+++ b/Source/WebCore/platform/graphics/nicosia/NicosiaPaintingEngineThreaded.cpp
>@@ -33,27 +33,10 @@
> #include "GraphicsLayer.h"
> #include "NicosiaBuffer.h"
> #include "NicosiaPaintingContext.h"
>-#include <glib.h>
>-#include <wtf/FastMalloc.h>
> 
> namespace Nicosia {
> using namespace WebCore;
> 
>-struct TaskData {
>-    WTF_MAKE_STRUCT_FAST_ALLOCATED;
>-
>-    Ref<Buffer> buffer;
>-    PaintingOperations paintingOperations;
>-};
>-
>-void s_threadFunc(gpointer data, gpointer)
>-{
>-    std::unique_ptr<TaskData> taskData(static_cast<TaskData*>(data));
>-
>-    PaintingContext::replay(taskData->buffer, taskData->paintingOperations);
>-    taskData->buffer->completePainting();
>-}
>-
> static void paintLayer(GraphicsContext& context, GraphicsLayer& layer, const IntRect& sourceRect, const IntRect& mappedSourceRect, const IntRect& targetRect, float contentsScale, bool supportsAlpha)
> {
>     context.save();
>@@ -75,14 +58,12 @@ static void paintLayer(GraphicsContext& context, GraphicsLayer& layer, const Int
> }
> 
> PaintingEngineThreaded::PaintingEngineThreaded()
>+    : m_workerPool(WorkerPool::create(4))
> {
>-    // FIXME: these parameters should be fine-tuned, or maybe made configurable.
>-    m_threadPool = g_thread_pool_new(s_threadFunc, nullptr, 4, TRUE, nullptr);
> }
> 
> PaintingEngineThreaded::~PaintingEngineThreaded()
> {
>-    g_thread_pool_free(m_threadPool, TRUE, FALSE);
> }
> 
> bool PaintingEngineThreaded::paint(GraphicsLayer& layer, Ref<Buffer>&& buffer, const IntRect& sourceRect, const IntRect& mappedSourceRect, const IntRect& targetRect, float contentsScale)
>@@ -96,7 +77,10 @@ bool PaintingEngineThreaded::paint(GraphicsLayer& layer, Ref<Buffer>&& buffer, c
>             paintLayer(context, layer, sourceRect, mappedSourceRect, targetRect, contentsScale, buffer->supportsAlpha());
>         });
> 
>-    g_thread_pool_push(m_threadPool, new TaskData { WTFMove(buffer), WTFMove(paintingOperations) }, nullptr);
>+    m_workerPool->postTask([paintingOperations = WTFMove(paintingOperations), buffer = WTFMove(buffer)] {
>+        PaintingContext::replay(buffer, paintingOperations);
>+        buffer->completePainting();
>+    });
> 
>     return true;
> }
>diff --git a/Source/WebCore/platform/graphics/nicosia/NicosiaPaintingEngineThreaded.h b/Source/WebCore/platform/graphics/nicosia/NicosiaPaintingEngineThreaded.h
>index 391c8cc3e284a57edeca9ec1270cce42bc0e8f5e..add14ed5f95c3022734ff942744726d5490c6e71 100644
>--- a/Source/WebCore/platform/graphics/nicosia/NicosiaPaintingEngineThreaded.h
>+++ b/Source/WebCore/platform/graphics/nicosia/NicosiaPaintingEngineThreaded.h
>@@ -29,8 +29,7 @@
> #pragma once
> 
> #include "NicosiaPaintingEngine.h"
>-
>-typedef struct _GThreadPool GThreadPool;
>+#include <wtf/WorkerPool.h>
> 
> namespace Nicosia {
> 
>@@ -42,7 +41,7 @@ class PaintingEngineThreaded final : public PaintingEngine {
> private:
>     bool paint(WebCore::GraphicsLayer&, Ref<Buffer>&&, const WebCore::IntRect&, const WebCore::IntRect&, const WebCore::IntRect&, float) override;
> 
>-    GThreadPool* m_threadPool;
>+    Ref<WorkerPool> m_workerPool;
> };
> 
> } // namespace Nicosia
>diff --git a/Tools/ChangeLog b/Tools/ChangeLog
>index 95329ffd6887a11a90cb634768ae9274cc51efcd..c80647794c9d11109b68fca2193039c9998b53b4 100644
>--- a/Tools/ChangeLog
>+++ b/Tools/ChangeLog
>@@ -1,3 +1,15 @@
>+2018-06-06  Yusuke Suzuki  <utatane.tea@gmail.com>
>+
>+        [WTF] Add WorkerPool
>+        https://bugs.webkit.org/show_bug.cgi?id=174569
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * TestWebKitAPI/CMakeLists.txt:
>+        * TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj:
>+        * TestWebKitAPI/Tests/WTF/WorkerPool.cpp: Added.
>+        (TestWebKitAPI::TEST):
>+
> 2018-06-06  Fujii Hironori  <Hironori.Fujii@sony.com>
> 
>         [Win][MiniBrowser] Remove gMainWindow global variable
>diff --git a/Tools/TestWebKitAPI/CMakeLists.txt b/Tools/TestWebKitAPI/CMakeLists.txt
>index 10f8fcafc05aa7d8e770f835e92ccee881857672..2e7d1c3d89a325eb5d9aef95e81fdfc7233ac0d7 100644
>--- a/Tools/TestWebKitAPI/CMakeLists.txt
>+++ b/Tools/TestWebKitAPI/CMakeLists.txt
>@@ -158,6 +158,7 @@ set(TestWTF_SOURCES
>     ${TESTWEBKITAPI_DIR}/Tests/WTF/WTFString.cpp
>     ${TESTWEBKITAPI_DIR}/Tests/WTF/WeakPtr.cpp
>     ${TESTWEBKITAPI_DIR}/Tests/WTF/WorkQueue.cpp
>+    ${TESTWEBKITAPI_DIR}/Tests/WTF/WorkerPool.cpp
> )
> 
> # FIXME: Tests/WTF/RunLoop.cpp is missing because it doesn't work for Windows.
>diff --git a/Tools/TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj b/Tools/TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj
>index 13167a892a4bf946b80ab55a7b56a710e80919fc..60c62a300b987b34ee4c329a5d260328e5d10bda 100644
>--- a/Tools/TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj
>+++ b/Tools/TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj
>@@ -1912,6 +1912,7 @@
> 		E194E1BA177E5145009C4D4E /* StopLoadingFromDidReceiveResponse.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = StopLoadingFromDidReceiveResponse.mm; sourceTree = "<group>"; };
> 		E194E1BC177E534A009C4D4E /* StopLoadingFromDidReceiveResponse.html */ = {isa = PBXFileReference; lastKnownFileType = text.html; path = StopLoadingFromDidReceiveResponse.html; sourceTree = "<group>"; };
> 		E19DB9781B32137C00DB38D4 /* NavigatorLanguage.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = NavigatorLanguage.mm; sourceTree = "<group>"; };
>+		E388887020C9098100E632BC /* WorkerPool.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = WorkerPool.cpp; sourceTree = "<group>"; };
> 		E38A0D341FD50CBC00E98C8B /* Threading.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = Threading.cpp; sourceTree = "<group>"; };
> 		E3953F951F2CF32100A76A2E /* Signals.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = Signals.cpp; sourceTree = "<group>"; };
> 		E398BC0F2041C76300387136 /* UniqueArray.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = UniqueArray.cpp; sourceTree = "<group>"; };
>@@ -2892,6 +2893,7 @@
> 				7CD0D5AA1D5534DE000CC9E1 /* Variant.cpp */,
> 				BC55F5F814AD78EE00484BE1 /* Vector.cpp */,
> 				1CB9BC371A67482300FE5678 /* WeakPtr.cpp */,
>+				E388887020C9098100E632BC /* WorkerPool.cpp */,
> 				7AA6A1511AAC0B31002B2ED3 /* WorkQueue.cpp */,
> 				265AF54F15D1E48A00B0CB4A /* WTFString.cpp */,
> 			);
>diff --git a/Tools/TestWebKitAPI/Tests/WTF/WorkerPool.cpp b/Tools/TestWebKitAPI/Tests/WTF/WorkerPool.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..f98e28a1a7a2b1ef2717eac524476045a9e6c6b5
>--- /dev/null
>+++ b/Tools/TestWebKitAPI/Tests/WTF/WorkerPool.cpp
>@@ -0,0 +1,51 @@
>+/*
>+ * Copyright (C) 2017 Yusuke Suzuki <utatane.tea@gmail.com>.
>+ *
>+ * 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.
>+ */
>+
>+#include "config.h"
>+
>+#include <wtf/DataLog.h>
>+#include <wtf/Seconds.h>
>+#include <wtf/Threading.h>
>+#include <wtf/WorkerPool.h>
>+
>+namespace TestWebKitAPI {
>+
>+TEST(WTF, WorkerPoolDecrease)
>+{
>+    std::atomic<unsigned> counter { 0 };
>+    {
>+        Ref<WorkerPool> pool = WorkerPool::create();
>+        for (int i = 0; i < 10000; ++i) {
>+            pool->postTask([&] {
>+                ++counter;
>+                Thread::yield();
>+            });
>+        }
>+        // When destroying WorkerPool, all the tasks are drained.
>+    }
>+    EXPECT_EQ(counter.load(), 10000U);
>+}
>+
>+} // namespace TestWebKitAPI

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Attachments on bug 174569: 315618 | 342125 | 342126 | 342133 | 342147 | 342164 | 342165 | 342167