CUDA：不允许不完整的类型等。答案

【问题标题】：CUDA: incomplete type is not allowed et al.CUDA：不允许不完整的类型等。
【发布时间】：2013-10-26 15:32:49
【问题描述】：

代码：

#include <cutil.h>
#include <cstdlib>
#include <cstdio>
#include <string.h>

#if defined(__APPLE__) || defined(MACOSX)
    #include <GLUT/glut.h>
#else
    #include <GL/glut.h>
#endif
#include <cuda_gl_interop.h>

#include "fluid_system_kern.cu"

extern "C"
{

// Compute number of blocks to create
int iDivUp (int a, int b) {
    return (a % b != 0) ? (a / b + 1) : (a / b);
}
void computeNumBlocks (int numPnts, int minThreads, int &numBlocks, int &numThreads)
{
    numThreads = min( minThreads, numPnts );
    numBlocks = iDivUp ( numPnts, numThreads );
}


void Grid_InsertParticlesCUDA ( uchar* data, uint stride, uint numPoints )
{
    int numThreads, numBlocks;
    computeNumBlocks (numPoints, 256, numBlocks, numThreads);

    // transfer point data to device
    char* pntData;
    size = numPoints * stride;
    cudaMalloc( (void**) &pntData, size);
    cudaMemcpy( pntData, data, size, cudaMemcpyHostToDevice);    

    // execute the kernel
    insertParticles<<< numBlocks, numThreads >>> ( pntData, stride );

    // transfer data back to host
    cudaMemcpy( data, pntData, cudaMemcpyDeviceToHost);

    // check if kernel invocation generated an error
    CUT_CHECK_ERROR("Kernel execution failed");
    CUDA_SAFE_CALL(cudaGLUnmapBufferObject(vboPos));
}

错误：

src/fluid_system.cu(30): error : incomplete type is not allowed (points to line -> "void Grid_InsertParticleCUDA")
src/fluid_system.cu(30): error : identifier "uchar" is undefined (points to line -> "void Grid_InsertParticleCUDA")
src/fluid_system.cu(30): error : identifier "data" is undefined (points to line -> "void Grid_InsertParticleCUDA")
src/fluid_system.cu(30): error : expected a ")" (points to line -> "void Grid_InsertParticleCUDA")
src/fluid_system.cu(31): error : expected a ";" (points to line after line-> "void Grid_InsertParticleCUDA")

我不明白似乎是什么问题。因为我没有看到那条线有什么奇怪的地方。我使用 CUDA 4.2

【问题讨论】：

uchar 和 uint 未定义。你的意思是unsigned char 和unsigned int？
也许我错了，但是extern "C"后面的括号{好像没有闭合？

标签： visual-studio-2010 visual-c++ cuda

【解决方案1】：

正如已经指出的，您有一些语法错误。

uchar 未在您的程序中的任何位置定义。要么添加一个定义它或将其更改为 unsigned char 这是正确的 C/C++ 类型。

这里的大括号排列不正确：

extern "C"
{  // this opening curly-brace has no proper corresponding close-brace

// Compute number of blocks to create
int iDivUp (int a, int b) {  // this open brace
    return (a % b != 0) ? (a / b + 1) : (a / b);
} // ... closes here
//  you should insert another closing curly-brace here }
void computeNumBlocks ...

【讨论】：