/*M///////////////////////////////////////////////////////////////////////////////////////
//
//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
//  By downloading, copying, installing or using the software you agree to this license.
//  If you do not agree to this license, do not download, install,
//  copy or use the software.
//
//
//                           License Agreement
//                For Open Source Computer Vision Library
//
// Copyright (C) 2010-2012, Institute Of Software Chinese Academy Of Science, all rights reserved.
// Copyright (C) 2010-2012, Advanced Micro Devices, Inc., all rights reserved.
// Third party copyrights are property of their respective owners.
//
// @Authors
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
//   * Redistribution's of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
//
//   * Redistribution's in binary form must reproduce the above copyright notice,
//     this list of conditions and the following disclaimer in the documentation
//     and/or other oclMaterials provided with the distribution.
//
//   * The name of the copyright holders may not 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 Intel Corporation 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.
//
//M*/

#include "precomp.hpp"

using namespace cv;
using namespace cv::ocl;
using namespace std;
using std::cout;
using std::endl;

namespace cv
{
    namespace ocl
    {
        class ProgramCache
        {
        protected:
            ProgramCache();
            friend class auto_ptr<ProgramCache>;
            static auto_ptr<ProgramCache> programCache;

        public:
            ~ProgramCache();
            static ProgramCache *getProgramCache()
            {
                if( NULL == programCache.get())
                    programCache.reset(new ProgramCache());
                return programCache.get();
            }

            //lookup the binary given the file name
            cl_program progLookup(string srcsign);

            //add program to the cache
            void addProgram(string srcsign, cl_program program);
            void releaseProgram();

            map <string, cl_program> codeCache;
            unsigned int cacheSize;
            //The presumed watermark for the cache volume (256MB). Is it enough?
            //We may need more delicate algorithms when necessary later.
            //Right now, let's just leave it along.
            static const unsigned MAX_PROG_CACHE_SIZE = 1024;
        };

    }//namespace ocl

}//namespace cv