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// 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 CONTENT_CHILD_WEBTHREAD_IMPL_H_
#define CONTENT_CHILD_WEBTHREAD_IMPL_H_
#include <map>
#include "base/memory/scoped_ptr.h"
#include "base/threading/thread.h"
#include "content/common/content_export.h"
#include "third_party/WebKit/public/platform/WebThread.h"
namespace blink {
class WebTraceLocation;
}
namespace content {
class CONTENT_EXPORT WebThreadBase : public blink::WebThread {
public:
virtual ~WebThreadBase();
// blink::WebThread implementation.
virtual bool isCurrentThread() const;
virtual blink::PlatformThreadId threadId() const = 0;
virtual void postTask(const blink::WebTraceLocation& location, Task* task);
virtual void postDelayedTask(const blink::WebTraceLocation& location,
Task* task,
long long delay_ms);
virtual void enterRunLoop();
virtual void exitRunLoop();
virtual void addTaskObserver(TaskObserver* observer);
virtual void removeTaskObserver(TaskObserver* observer);
// Returns the base::Bind-compatible task runner for posting tasks to this
// thread. Can be called from any thread.
virtual base::SingleThreadTaskRunner* TaskRunner() const = 0;
protected:
class TaskObserverAdapter;
WebThreadBase();
// Returns the underlying MessageLoop for this thread. Only used for entering
// and exiting a nested run loop. Only called on the thread that the
// WebThread belongs to.
virtual base::MessageLoop* MessageLoop() const = 0;
virtual void AddTaskObserverInternal(
base::MessageLoop::TaskObserver* observer);
virtual void RemoveTaskObserverInternal(
base::MessageLoop::TaskObserver* observer);
static void RunWebThreadTask(scoped_ptr<blink::WebThread::Task> task);
private:
typedef std::map<TaskObserver*, TaskObserverAdapter*> TaskObserverMap;
TaskObserverMap task_observer_map_;
};
class CONTENT_EXPORT WebThreadImpl : public WebThreadBase {
public:
explicit WebThreadImpl(const char* name);
virtual ~WebThreadImpl();
// blink::WebThread implementation.
blink::PlatformThreadId threadId() const override;
// WebThreadBase implementation.
base::SingleThreadTaskRunner* TaskRunner() const override;
private:
base::MessageLoop* MessageLoop() const override;
scoped_ptr<base::Thread> thread_;
};
} // namespace content
#endif // CONTENT_CHILD_WEBTHREAD_IMPL_H_
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