cudaMappedMemory.h

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/*
 * Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
 *
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 * Software is furnished to do so, subject to the following conditions:
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 * The above copyright notice and this permission notice shall be included in
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#ifndef __CUDA_MAPPED_MEMORY_H_
#define __CUDA_MAPPED_MEMORY_H_
 
 
#include "cudaUtility.h"
#include "imageFormat.h"
#include "logging.h"
 
 
inline bool cudaAllocMapped( void** cpuPtr, void** gpuPtr, size_t size )
{
        if( !cpuPtr || !gpuPtr || size == 0 )
                return false;
 
        //CUDA(cudaSetDeviceFlags(cudaDeviceMapHost));
 
        if( CUDA_FAILED(cudaHostAlloc(cpuPtr, size, cudaHostAllocMapped)) )
                return false;
 
        if( CUDA_FAILED(cudaHostGetDevicePointer(gpuPtr, *cpuPtr, 0)) )
                return false;
 
        memset(*cpuPtr, 0, size);
        LogDebug(LOG_CUDA "cudaAllocMapped %zu bytes, CPU %p GPU %p\n", size, *cpuPtr, *gpuPtr);
        return true;
}
 
 
inline bool cudaAllocMapped( void** ptr, size_t size )
{
        void* cpuPtr = NULL;
        void* gpuPtr = NULL;
 
        if( !ptr || size == 0 )
                return false;
 
        if( !cudaAllocMapped(&cpuPtr, &gpuPtr, size) )
                return false;
 
        if( cpuPtr != gpuPtr )
        {
                LogError(LOG_CUDA "cudaAllocMapped() - addresses of CPU and GPU pointers don't match\n");
                return false;
        }
 
        *ptr = gpuPtr;
        return true;
}
 
inline bool cudaAllocMapped( void** ptr, size_t width, size_t height, imageFormat format )
{
        return cudaAllocMapped(ptr, imageFormatSize(format, width, height));
}
 
 
inline bool cudaAllocMapped( void** ptr, const int2& dims, imageFormat format )
{
        return cudaAllocMapped(ptr, imageFormatSize(format, dims.x, dims.y));
}
 
 
template<typename T> inline bool cudaAllocMapped( T** ptr, size_t width, size_t height )
{
        return cudaAllocMapped((void**)ptr, width * height * sizeof(T));
}
 
 
template<typename T> inline bool cudaAllocMapped( T** ptr, const int2& dims )
{
        return cudaAllocMapped((void**)ptr, dims.x * dims.y * sizeof(T));
}
 
 
template<typename T> inline bool cudaAllocMapped( T** ptr, size_t size )
{
        return cudaAllocMapped((void**)ptr, size);
}
 
#endif