How to get size of an array in CUDA kernel function?

Question

I have a CUDA kernel function like this:

__global__ void kernel(int a, int b)
{
extern __shared__ unsigned char array[];
//int size = /*size of array*/; = 16
}

and in function main I called it:

sharedMemSize = 16;
kernel<<<gridSize, blockSize, sharedMemSize>>>(1, 2);

How can I get size of shared memory array? This is the first time I have a question on StackOverflow :) Thank you!!!

Answer 1

You can get the size in bytes of your array using: sizeof(array).