cuda1.cu
#include <iostream>
using namespace std ;
# define DELLEXPORT extern "C" __declspec(dllexport)
__global__ void kernel(long* answer = 0){
*answer = threadIdx.x + (blockIdx.x * blockDim.x);
}
DELLEXPORT void resoult(long* h_answer){
long* d_answer = 0;
cudaMalloc(&d_answer, sizeof(long));
kernel<<<10,1000>>>(d_answer);
cudaMemcpy(&h_answer, d_answer, sizeof(long), cudaMemcpyDeviceToHost);
cudaFree(d_answer);
}
主要的py公司
import ctypes
import numpy as np
add_lib = ctypes.CDLL(".\\a.dll")
resoult= add_lib.resoult
resoult.argtypes = [ctypes.POINTER(ctypes.c_long)]
x = ctypes.c_long()
print("R:",resoult(x))
print("RV: ",x.value)
print("RB: ",resoult(ctypes.byref(x)))
python输出:0
cuda输出:2096
我基于c语言实现，没有任何问题，但在cuda模式下，我有一个问题，如何才能获得正确的输出值
谢谢