119 lines
3.4 KiB
C++
119 lines
3.4 KiB
C++
/*
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* Copyright (C) 2008 Apple Inc. All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "StorageThread.h"
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#include <wtf/AutodrainedPool.h>
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#include <wtf/HashSet.h>
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#include <wtf/MainThread.h>
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#include <wtf/NeverDestroyed.h>
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namespace WebCore {
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static HashSet<StorageThread*>& activeStorageThreads()
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{
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ASSERT(isMainThread());
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static NeverDestroyed<HashSet<StorageThread*>> threads;
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return threads;
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}
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StorageThread::StorageThread(Type type)
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: m_type(type)
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{
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ASSERT(isMainThread());
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}
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StorageThread::~StorageThread()
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{
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ASSERT(isMainThread());
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ASSERT(!m_thread);
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}
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void StorageThread::start()
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{
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ASSERT(isMainThread());
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if (!m_thread) {
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if (m_type == Type::LocalStorage) {
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m_thread = Thread::create("LocalStorage", [this] {
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threadEntryPoint();
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});
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} else {
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ASSERT(m_type == Type::IndexedDB);
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m_thread = Thread::create("IndexedDB", [this] {
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threadEntryPoint();
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});
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}
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}
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activeStorageThreads().add(this);
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}
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void StorageThread::threadEntryPoint()
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{
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ASSERT(!isMainThread());
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while (auto function = m_queue.waitForMessage()) {
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AutodrainedPool pool;
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(*function)();
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}
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}
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void StorageThread::dispatch(Function<void ()>&& function)
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{
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ASSERT(isMainThread());
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ASSERT(!m_queue.killed() && m_thread);
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m_queue.append(makeUnique<Function<void ()>>(WTFMove(function)));
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}
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void StorageThread::terminate()
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{
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ASSERT(isMainThread());
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ASSERT(!m_queue.killed() && m_thread);
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activeStorageThreads().remove(this);
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// Even in weird, exceptional cases, don't wait on a nonexistent thread to terminate.
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if (!m_thread)
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return;
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m_queue.append(makeUnique<Function<void ()>>([this] {
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performTerminate();
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}));
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m_thread->waitForCompletion();
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ASSERT(m_queue.killed());
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m_thread = nullptr;
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}
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void StorageThread::performTerminate()
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{
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ASSERT(!isMainThread());
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m_queue.kill();
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}
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void StorageThread::releaseFastMallocFreeMemoryInAllThreads()
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{
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for (auto& thread : activeStorageThreads())
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thread->dispatch(&WTF::releaseFastMallocFreeMemory);
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}
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}
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