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#ifndef __OPENCV_CUDA_SHARED_HPP__
#define __OPENCV_CUDA_SHARED_HPP__

#include "opencv2/gpu/devmem2d.hpp"
#include "safe_call.hpp"
#include "cuda_runtime.h"

namespace cv
{
    namespace gpu
    {
        typedef unsigned char uchar;
        typedef signed char schar;
        typedef unsigned short ushort;
        typedef unsigned int uint;        

        static inline int divUp(int total, int grain) { return (total + grain - 1) / grain; }

        template<class T> static inline void uploadConstant(const char* name, const T& value) 
        { 
            cudaSafeCall( cudaMemcpyToSymbol(name, &value, sizeof(T)) ); 
        }

        template<class T> static inline void uploadConstant(const char* name, const T& value, cudaStream_t stream) 
        {
            cudaSafeCall( cudaMemcpyToSymbolAsync(name, &value, sizeof(T), 0, cudaMemcpyHostToDevice, stream) ); 
        }        

        template<class T> static inline void bindTexture(const char* name, const DevMem2D_<T>& img/*, bool normalized = false,
            enum cudaTextureFilterMode filterMode = cudaFilterModePoint, enum cudaTextureAddressMode addrMode = cudaAddressModeClamp*/)
        {            
            //!!!! const_cast is disabled!
            //!!!! Please use constructor of 'class texture'  instead.

            //textureReference* tex; 
            //cudaSafeCall( cudaGetTextureReference((const textureReference**)&tex, name) ); 
            //tex->normalized = normalized;
            //tex->filterMode = filterMode;
            //tex->addressMode[0] = addrMode;
            //tex->addressMode[1] = addrMode;
            
            const textureReference* tex; 
            cudaSafeCall( cudaGetTextureReference(&tex, name) ); 

            cudaChannelFormatDesc desc = cudaCreateChannelDesc<T>();
            cudaSafeCall( cudaBindTexture2D(0, tex, img.ptr(), &desc, img.cols, img.rows, img.step) );
        }

        static inline void unbindTexture(const char *name)
        {
            const textureReference* tex; 
            cudaSafeCall( cudaGetTextureReference(&tex, name) ); 
            cudaSafeCall( cudaUnbindTexture(tex) );
        }        

    }
}


#endif /* __OPENCV_CUDA_SHARED_HPP__ */