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#include <cuda.h>
#include <iostream>
#include <string>
#ifdef _WIN32
# define EXPORT __declspec(dllexport)
#else
# define EXPORT
#endif
int dynamic_base_func(int);
EXPORT int __host__ cuda_dynamic_host_func(int x)
{
return dynamic_base_func(x);
}
static __global__ void DetermineIfValidCudaDevice()
{
}
EXPORT int choose_cuda_device()
{
int nDevices = 0;
cudaError_t err = cudaGetDeviceCount(&nDevices);
if (err != cudaSuccess) {
std::cerr << "Failed to retrieve the number of CUDA enabled devices"
<< std::endl;
return 1;
}
for (int i = 0; i < nDevices; ++i) {
cudaDeviceProp prop;
cudaError_t err = cudaGetDeviceProperties(&prop, i);
if (err != cudaSuccess) {
std::cerr << "Could not retrieve properties from CUDA device " << i
<< std::endl;
return 1;
}
if (prop.major >= 3) {
err = cudaSetDevice(i);
if (err != cudaSuccess) {
std::cout << "Could not select CUDA device " << i << std::endl;
} else {
return 0;
}
}
}
std::cout << "Could not find a CUDA enabled card supporting compute >=3.0"
<< std::endl;
return 1;
}
EXPORT void cuda_dynamic_lib_func()
{
DetermineIfValidCudaDevice<<<1, 1>>>();
cudaError_t err = cudaGetLastError();
if (err != cudaSuccess) {
std::cerr << "DetermineIfValidCudaDevice [SYNC] failed: "
<< cudaGetErrorString(err) << std::endl;
}
err = cudaDeviceSynchronize();
if (err != cudaSuccess) {
std::cerr << "DetermineIfValidCudaDevice [ASYNC] failed: "
<< cudaGetErrorString(cudaGetLastError()) << std::endl;
}
}
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