Test case for bug in cudaGLGetDevices

test_cudaGLGetDevices.cu

#include <GLFW/glfw3.h>
#include <cuda_gl_interop.h>
#include <cuda.h>

#include <cstdio>

int main()
{
    if (!glfwInit()) return;

    glfwWindowHint(GLFW_VISIBLE, GLFW_FALSE);
    GLFWwindow* offscreen_context = glfwCreateWindow(640, 480, "", NULL, NULL);

    if (offscreen_context) {
        glfwMakeContextCurrent(offscreen_context);

        int gl_device = -1;
        unsigned int device_count = 0;
        if (cudaGLGetDevices(&device_count, &gl_device, 1, cudaGLDeviceListAll) == cudaSuccess) {
            if (device_count > 0 && gl_device >= 0) {
                //set_cuda_device(gl_device);
            }
            printf("device_count=%d\n", device_count);
        }

        glfwDestroyWindow(offscreen_context);
    }

    glfwTerminate();
}