CCMainThreadTask.h   [plain text]

/*
 * Copyright (C) 2011 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:
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  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.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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 CCMainThreadTask_h
#define CCMainThreadTask_h

#include "CCMainThread.h"
#include "CrossThreadCopier.h"
#include "CrossThreadTask.h"
#include <wtf/PassOwnPtr.h>
#include <wtf/PassRefPtr.h>

namespace WebCore {

template<typename T>
class MainThreadTask0 : public CCMainThread::Task {
public:
    typedef void (T::*Method)();
    typedef MainThreadTask0<T> MainThreadTaskImpl;

    static PassOwnPtr<MainThreadTaskImpl> create(T* instance, Method method)
    {
        return adoptPtr(new MainThreadTaskImpl(instance, method));
    }

private:
    MainThreadTask0(T* instance, Method method)
        : CCMainThread::Task(instance)
        , m_method(method)
    {
    }

    virtual void performTask()
    {
        (*static_cast<T*>(instance()).*m_method)();
    }

private:
    Method m_method;
};

template<typename T, typename P1, typename MP1>
class MainThreadTask1 : public CCMainThread::Task {
public:
    typedef void (T::*Method)(MP1);
    typedef MainThreadTask1<T, P1, MP1> MainThreadTaskImpl;
    typedef typename CrossThreadTaskTraits<P1>::ParamType Param1;

    static PassOwnPtr<MainThreadTaskImpl> create(T* instance, Method method, Param1 parameter1)
    {
        return adoptPtr(new MainThreadTaskImpl(instance, method, parameter1));
    }

private:
    MainThreadTask1(T* instance, Method method, Param1 parameter1)
        : CCMainThread::Task(instance)
        , m_method(method)
        , m_parameter1(parameter1)
    {
    }

    virtual void performTask()
    {
        (*static_cast<T*>(instance()).*m_method)(m_parameter1);
    }

private:
    Method m_method;
    P1 m_parameter1;
};

template<typename T, typename P1, typename MP1, typename P2, typename MP2>
class MainThreadTask2 : public CCMainThread::Task {
public:
    typedef void (T::*Method)(MP1, MP2);
    typedef MainThreadTask2<T, P1, MP1, P2, MP2> MainThreadTaskImpl;
    typedef typename CrossThreadTaskTraits<P1>::ParamType Param1;
    typedef typename CrossThreadTaskTraits<P2>::ParamType Param2;

    static PassOwnPtr<MainThreadTaskImpl> create(T* instance, Method method, Param1 parameter1, Param2 parameter2)
    {
        return adoptPtr(new MainThreadTaskImpl(instance, method, parameter1, parameter2));
    }

private:
    MainThreadTask2(T* instance, Method method, Param1 parameter1, Param2 parameter2)
        : CCMainThread::Task(instance)
        , m_method(method)
        , m_parameter1(parameter1)
        , m_parameter2(parameter2)
    {
    }

    virtual void performTask()
    {
        (*static_cast<T*>(instance()).*m_method)(m_parameter1, m_parameter2);
    }

private:
    Method m_method;
    P1 m_parameter1;
    P2 m_parameter2;
};

template<typename T, typename P1, typename MP1, typename P2, typename MP2, typename P3, typename MP3>
class MainThreadTask3 : public CCMainThread::Task {
public:
    typedef void (T::*Method)(MP1, MP2, MP3);
    typedef MainThreadTask3<T, P1, MP1, P2, MP2, P3, MP3> MainThreadTaskImpl;
    typedef typename CrossThreadTaskTraits<P1>::ParamType Param1;
    typedef typename CrossThreadTaskTraits<P2>::ParamType Param2;
    typedef typename CrossThreadTaskTraits<P3>::ParamType Param3;

    static PassOwnPtr<MainThreadTaskImpl> create(T* instance, Method method, Param1 parameter1, Param2 parameter2, Param3 parameter3)
    {
        return adoptPtr(new MainThreadTaskImpl(instance, method, parameter1, parameter2, parameter3));
    }

private:
    MainThreadTask3(T* instance, Method method, Param1 parameter1, Param2 parameter2, Param3 parameter3)
        : CCMainThread::Task(instance)
        , m_method(method)
        , m_parameter1(parameter1)
        , m_parameter2(parameter2)
        , m_parameter3(parameter3)
    {
    }

    virtual void performTask()
    {
        (*static_cast<T*>(instance()).*m_method)(m_parameter1, m_parameter2, m_parameter3);
    }

private:
    Method m_method;
    P1 m_parameter1;
    P2 m_parameter2;
    P3 m_parameter3;
};

template<typename T>
PassOwnPtr<CCMainThread::Task> createMainThreadTask(
    T* const callee,
    void (T::*method)());

template<typename T>
PassOwnPtr<CCMainThread::Task> createMainThreadTask(
    T* const callee,
    void (T::*method)())
{
    return MainThreadTask0<T>::create(
        callee,
        method);
}

template<typename T, typename P1, typename MP1>
PassOwnPtr<CCMainThread::Task> createMainThreadTask(
    T* const callee,
    void (T::*method)(MP1),
    const P1& parameter1)
{
    return MainThreadTask1<T, typename CrossThreadCopier<P1>::Type, MP1>::create(
        callee,
        method,
        CrossThreadCopier<P1>::copy(parameter1));
}

template<typename T, typename P1, typename MP1, typename P2, typename MP2>
PassOwnPtr<CCMainThread::Task> createMainThreadTask(
    T* const callee,
    void (T::*method)(MP1, MP2),
    const P1& parameter1,
    const P2& parameter2)
{
    return MainThreadTask2<T, typename CrossThreadCopier<P1>::Type, MP1, typename CrossThreadCopier<P2>::Type, MP2>::create(
        callee,
        method,
        CrossThreadCopier<P1>::copy(parameter1),
        CrossThreadCopier<P2>::copy(parameter2));
}

template<typename T, typename P1, typename MP1, typename P2, typename MP2, typename P3, typename MP3>
PassOwnPtr<CCMainThread::Task> createMainThreadTask(
    T* const callee,
    void (T::*method)(MP1, MP2, MP3),
    const P1& parameter1,
    const P2& parameter2,
    const P3& parameter3)
{
    return MainThreadTask3<T, 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 // CCMainThreadTask_h