CUDA数组分配

cuda内存分配真是乱啊，这次总结一下数组的分配。

概述：数组分配可以通过cudaMallocArray()和cudaMalloc3DArray()

1、cudaMallocArray()

cudaError_t cudaMallocArray    (    struct cudaArray **     array,
    const struct cudaChannelFormatDesc *     desc,
    size_t     width,
    size_t     height = 0,
    unsigned int     flags = 0     
)    

例：2DArray分配

1 cudaArray *d_volumeArray;
2 cudaChannelFormatDesc desc = cudaCreateChannelDesc(32, 0, 0, 0, cudaChannelFormatKindFloat);
3 cudaMallocArray(&d_volumeArray, &desc, 128, 128);
4 cudaMemcpyToArray(d_volumeArray, 0, 0, h_volume, sizeof(float)*128*128, cudaMemcpyDeviceToDevice);

2、cudaMalloc3DArray()

1 cudaError_t cudaMalloc3DArray    (    
2     struct cudaArray **     array,
3     const struct cudaChannelFormatDesc *     desc,
4     struct cudaExtent     extent,
5     unsigned int     flags = 0     
6 )    

例：

1 cudaChannelFormatDesc channelDesc = cudaCreateChannelDesc<uchar>();
2 cudaArray *d_volumeArray;
3 cudaMalloc3DArray(&d_volumeArray, &channelDesc, volumSize);