android_hardware_qcom_display/libgralloc/alloc_controller.h

/*
 * Copyright (c) 2011, Code Aurora Forum. 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 Code Aurora Forum, 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 "AS IS" AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
 * 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 GRALLOC_ALLOCCONTROLLER_H
#define GRALLOC_ALLOCCONTROLLER_H

#include <utils/RefBase.h>

namespace gralloc {

    struct alloc_data;
    class IMemAlloc;
    class IonAlloc;

    class IAllocController : public android::RefBase {

        public:
            /* Allocate using a suitable method
             * Returns the type of buffer allocated
             */
            virtual int allocate(alloc_data& data, int usage,
                    int compositionType) = 0;

            virtual android::sp<IMemAlloc> getAllocator(int flags) = 0;

            virtual ~IAllocController() {};

            static android::sp<IAllocController> getInstance(bool useMasterHeap);

        private:
            static android::sp<IAllocController> sController;

    };

    class IonController : public IAllocController {

        public:
            virtual int allocate(alloc_data& data, int usage,
                    int compositionType);

            virtual android::sp<IMemAlloc> getAllocator(int flags);

            IonController();

        private:
            android::sp<IonAlloc> mIonAlloc;

    };

    class PmemKernelController : public IAllocController {

        public:
            virtual int allocate(alloc_data& data, int usage,
                    int compositionType);

            virtual android::sp<IMemAlloc> getAllocator(int flags);

            PmemKernelController ();

            ~PmemKernelController ();

        private:
            android::sp<IMemAlloc> mPmemAdspAlloc;

    };

    // Main pmem controller - this should only
    // be used within gralloc
    class PmemAshmemController : public IAllocController {

        public:
            virtual int allocate(alloc_data& data, int usage,
                    int compositionType);

            virtual android::sp<IMemAlloc> getAllocator(int flags);

            PmemAshmemController();

            ~PmemAshmemController();

        private:
            android::sp<IMemAlloc> mPmemUserspaceAlloc;
            android::sp<IMemAlloc> mAshmemAlloc;
            android::sp<IAllocController> mPmemKernelCtrl;

    };

} //end namespace gralloc
#endif // GRALLOC_ALLOCCONTROLLER_H