/*

 * 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 FileThreadTask_h

#define FileThreadTask_h

#include "CrossThreadCopier.h"

#include "FileThread.h"

#include <memory>

#include <wtf/PassOwnPtr.h>

#include <wtf/PassRefPtr.h>

#include <wtf/TypeTraits.h>

namespace WebCore {

// Traits for the Task.

template<typename T> struct FileThreadTaskTraits {

    typedef const T& ParamType;

};

template<typename T> struct FileThreadTaskTraits<T*> {

    typedef T* ParamType;

};

template<typename T> struct FileThreadTaskTraits<PassRefPtr<T> > {

    typedef PassRefPtr<T> ParamType;

};

template<typename T> struct FileThreadTaskTraits<PassOwnPtr<T> > {

    typedef PassOwnPtr<T> ParamType;

};

class FileThreadTask0 : public FileThread::Task {

public:

    typedef void (FileStream::*Method)();

    typedef FileThreadTask0 FileThreadTask;

    static PassOwnPtr<FileThreadTask> create(FileStream* stream, Method method)

    {

        return new FileThreadTask(stream, method);

    }

private:

    FileThreadTask0(FileStream* stream, Method method)

        : FileThread::Task(stream)

        , m_method(method)

    {

    }

    virtual void performTask()

    {

        (*stream().*m_method)();

    }

private:

    Method m_method;

};

template<typename P1, typename MP1>

class FileThreadTask1 : public FileThread::Task {

public:

    typedef void (FileStream::*Method)(MP1);

    typedef FileThreadTask1<P1, MP1> FileThreadTask;

    typedef typename FileThreadTaskTraits<P1>::ParamType Param1;

    static PassOwnPtr<FileThreadTask> create(FileStream* stream, Method method, Param1 parameter1)

    {

        return new FileThreadTask(stream, method, parameter1);

    }

private:

    FileThreadTask1(FileStream* stream, Method method, Param1 parameter1)

        : FileThread::Task(stream)

        , m_method(method)

        , m_parameter1(parameter1)

    {

    }

    virtual void performTask()

    {

        (*stream().*m_method)(m_parameter1);

    }

private:

    Method m_method;

    P1 m_parameter1;

};

template<typename P1, typename MP1, typename P2, typename MP2>

class FileThreadTask2 : public FileThread::Task {

public:

    typedef void (FileStream::*Method)(MP1, MP2);

    typedef FileThreadTask2<P1, MP1, P2, MP2> FileThreadTask;

    typedef typename FileThreadTaskTraits<P1>::ParamType Param1;

    typedef typename FileThreadTaskTraits<P2>::ParamType Param2;

    static PassOwnPtr<FileThreadTask> create(FileStream* stream, Method method, Param1 parameter1, Param2 parameter2)

    {

        return new FileThreadTask(stream, method, parameter1, parameter2);

    }

private:

    FileThreadTask2(FileStream* stream, Method method, Param1 parameter1, Param2 parameter2)

        : FileThread::Task(stream)

        , m_method(method)

        , m_parameter1(parameter1)

        , m_parameter2(parameter2)

    {

    }

    virtual void performTask()

    {

        (*stream().*m_method)(m_parameter1, m_parameter2);

    }

private:

    Method m_method;

    P1 m_parameter1;

    P2 m_parameter2;

};

template<typename P1, typename MP1, typename P2, typename MP2, typename P3, typename MP3>

class FileThreadTask3 : public FileThread::Task {

public:

    typedef void (FileStream::*Method)(MP1, MP2, MP3);

    typedef FileThreadTask3<P1, MP1, P2, MP2, P3, MP3> FileThreadTask;

    typedef typename FileThreadTaskTraits<P1>::ParamType Param1;

    typedef typename FileThreadTaskTraits<P2>::ParamType Param2;

    typedef typename FileThreadTaskTraits<P3>::ParamType Param3;

    static PassOwnPtr<FileThreadTask> create(FileStream* stream, Method method, Param1 parameter1, Param2 parameter2, Param3 parameter3)

    {

        return new FileThreadTask(stream, method, parameter1, parameter2, parameter3);

    }

private:

    FileThreadTask3(FileStream* stream, Method method, Param1 parameter1, Param2 parameter2, Param3 parameter3)

        : FileThread::Task(stream)

        , m_method(method)

        , m_parameter1(parameter1)

        , m_parameter2(parameter2)

        , m_parameter3(parameter3)

    {

    }

    virtual void performTask()

    {

        (*stream().*m_method)(m_parameter1, m_parameter2, m_parameter3);

    }

private:

    Method m_method;

    P1 m_parameter1;

    P2 m_parameter2;

    P3 m_parameter3;

};

PassOwnPtr<FileThread::Task> createFileThreadTask(

    FileStream* const callee,

    void (FileStream::*method)());

PassOwnPtr<FileThread::Task> createFileThreadTask(

    FileStream* const callee,

    void (FileStream::*method)())

{

    return FileThreadTask0::create(

        callee,

        method);

}

template<typename P1, typename MP1>

PassOwnPtr<FileThread::Task> createFileThreadTask(

    FileStream* const callee,

    void (FileStream::*method)(MP1),

    const P1& parameter1)

{

    return FileThreadTask1<typename CrossThreadCopier<P1>::Type, MP1>::create(

        callee,

        method,

        CrossThreadCopier<P1>::copy(parameter1));

}

template<typename P1, typename MP1, typename P2, typename MP2>

PassOwnPtr<FileThread::Task> createFileThreadTask(

    FileStream* const callee,

    void (FileStream::*method)(MP1, MP2),

    const P1& parameter1,

    const P2& parameter2)

{

    return FileThreadTask2<typename CrossThreadCopier<P1>::Type, MP1, typename CrossThreadCopier<P2>::Type, MP2>::create(

        callee,

        method,

        CrossThreadCopier<P1>::copy(parameter1),

        CrossThreadCopier<P2>::copy(parameter2));

}

template<typename P1, typename MP1, typename P2, typename MP2, typename P3, typename MP3>

PassOwnPtr<FileThread::Task> createFileThreadTask(

    FileStream* const callee,

    void (FileStream::*method)(MP1, MP2, MP3),

    const P1& parameter1,

    const P2& parameter2,

    const P3& parameter3)

{

    return FileThreadTask3<typename CrossThreadCopier<P1>::Type, MP1, typename CrossThreadCopier<P2>::Type, MP2, typename CrossThreadCopier<P3>::Type, MP3>::create(

        callee,

        method,

        CrossThreadCopier<P1>::copy(parameter1),

        CrossThreadCopier<P2>::copy(parameter2),

        CrossThreadCopier<P3>::copy(parameter3));

}

} // namespace WebCore

#endif // FileThreadTask_h