Function call_cuda_forksafe

src/core/impl/comp_node/cuda/comp_node.cpp:822–825

#ifndef __unix__
template <typename Func, typename Val>
CUresult call_cuda_forksafe(Func func, Val* val, size_t len) {
    cuInit(0);
    return func();
}
#else
struct RAIICloseFD : NonCopyableObj {
    int m_fd = -1;