R内部构件：从SEXP对象中提取函数指针

Question

Is there a way to extract a C-style function pointer from an SEXP object?

The Writing R Extensions zero-finding example is almost what I want. The body of f.check is passed from R to C and then called with eval . Since I'm working inside CUDA, I can't call eval on an SEXP object in this way or use the Function type in Rcpp directly. I have to unpack the raw function pointer inside the SEXP and pass it to a CUDA kernel.

Answer 1

GPUs can only run kernels consisting of code specifically designed for the architecture. I know very little about CUDA, but I think the principles are the same as OpenCL, which is pretty much C with an API for dealing with GPU memory and parallel architecture. You can't just run R or C++ code in the GPU. All the pointer is going to give you is a number stuck in the GPU. You can't call functions in main memory from the GPU.