blob: 3c58d6de9aaab31763879d2a9acf7aa7586c6f03 [file] [log] [blame]
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef WebThreadSupportingGC_h
#define WebThreadSupportingGC_h
#include "platform/heap/glue/MessageLoopInterruptor.h"
#include "platform/heap/glue/PendingGCRunner.h"
#include "public/platform/Platform.h"
#include "public/platform/WebThread.h"
#include "wtf/Noncopyable.h"
#include "wtf/OwnPtr.h"
#include "wtf/PassOwnPtr.h"
namespace blink {
// WebThreadSupportingGC wraps a WebThread and adds support for attaching
// to and detaching from the Blink GC infrastructure. The attachGC method
// must be called during initialization on the WebThread and before the
// thread allocates any objects managed by the Blink GC. The detach GC
// method must be called on the WebThread during shutdown when the thread
// no longer needs to access objects managed by the Blink GC.
class PLATFORM_EXPORT WebThreadSupportingGC final {
WTF_MAKE_NONCOPYABLE(WebThreadSupportingGC);
public:
static PassOwnPtr<WebThreadSupportingGC> create(const char*);
~WebThreadSupportingGC();
void postTask(WebThread::Task* task)
{
m_thread->postTask(task);
}
void postDelayedTask(WebThread::Task* task, long long delayMs)
{
m_thread->postDelayedTask(task, delayMs);
}
bool isCurrentThread() const
{
return m_thread->isCurrentThread();
}
void addTaskObserver(WebThread::TaskObserver* observer)
{
m_thread->addTaskObserver(observer);
}
void removeTaskObserver(WebThread::TaskObserver* observer)
{
m_thread->removeTaskObserver(observer);
}
void enterRunLoop()
{
m_thread->enterRunLoop();
}
void exitRunLoop()
{
m_thread->exitRunLoop();
}
void attachGC();
void detachGC();
WebThread& platformThread() const
{
ASSERT(m_thread);
return *m_thread;
}
private:
explicit WebThreadSupportingGC(const char*);
OwnPtr<PendingGCRunner> m_pendingGCRunner;
OwnPtr<MessageLoopInterruptor> m_messageLoopInterruptor;
// FIXME: This has to be last because of crbug.com/401397.
// A WorkerThread might get deleted before it had a chance to properly
// shut down. By deleting the WebThread first, we can guarantee that
// no pending tasks on the thread might want to access any of the other
// members during the WorkerThread's destruction.
OwnPtr<WebThread> m_thread;
};
}
#endif