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/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
* OWNER 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.
*/
#ifndef FileThread_h
#define FileThread_h
#include <functional>
#include <wtf/MessageQueue.h>
#include <wtf/PassRefPtr.h>
#include <wtf/Threading.h>
namespace WebCore {
class FileStream;
class FileThread : public ThreadSafeRefCounted<FileThread> {
public:
static PassRefPtr<FileThread> create()
{
return adoptRef(new FileThread());
}
~FileThread();
bool start();
void stop();
class Task {
WTF_MAKE_NONCOPYABLE(Task);
public:
template<typename T, typename U, typename = typename std::enable_if<!std::is_base_of<Task, U>::value && std::is_convertible<U, std::function<void ()>>::value>::type>
Task(T* instance, U method)
: m_task(WTF::move(method))
, m_instance(instance)
{
}
Task(Task&& other)
: m_task(WTF::move(other.m_task))
, m_instance(other.m_instance)
{
}
void performTask()
{
m_task();
}
void* instance() const { return m_instance; }
private:
std::function<void ()> m_task;
void* m_instance;
};
void postTask(Task);
void unscheduleTasks(const void* instance);
private:
FileThread();
static void fileThreadStart(void*);
void runLoop();
ThreadIdentifier m_threadID;
RefPtr<FileThread> m_selfRef;
MessageQueue<Task> m_queue;
Mutex m_threadCreationMutex;
};
} // namespace WebCore
#endif // FileThread_h
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