opensubdiv-petite 0.3.1

Wrapper around parts of Pixar’s OpenSubdiv
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#[test]
fn safe_wrappers_creation() {
    // Test that we can create safe wrappers from null pointers
    #[cfg(feature = "opencl")]
    {
        let context =
            unsafe { osd::opencl_vertex_buffer::OpenClContext::from_ptr(ptr::null_mut()) };
        assert!(context.is_none());

        let queue =
            unsafe { osd::opencl_vertex_buffer::OpenClCommandQueue::from_ptr(ptr::null_mut()) };
        assert!(queue.is_none());

        let kernel = unsafe { osd::opencl_evaluator::OpenClKernel::from_ptr(ptr::null_mut()) };
        assert!(kernel.is_none());
    }

    #[cfg(feature = "cuda")]
    {
        let context = unsafe { osd::cuda_vertex_buffer::CudaContext::from_ptr(ptr::null_mut()) };
        assert!(context.is_none());
    }

    #[cfg(all(feature = "metal", target_os = "macos"))]
    {
        let device = unsafe { osd::metal_vertex_buffer::MetalDevice::from_ptr(ptr::null_mut()) };
        assert!(device.is_none());

        let cmd_buffer =
            unsafe { osd::metal_vertex_buffer::MetalCommandBuffer::from_ptr(ptr::null_mut()) };
        assert!(cmd_buffer.is_none());

        let encoder =
            unsafe { osd::metal_evaluator::MetalComputeEncoder::from_ptr(ptr::null_mut()) };
        assert!(encoder.is_none());
    }
}

#[test]
fn wrapper_lifetime_safety() {
    // Test that wrappers properly enforce lifetime constraints

    // Create a non-null pointer for testing
    let _test_ptr = 0x1234 as *mut std::ffi::c_void;

    #[cfg(feature = "opencl")]
    {
        let context =
            unsafe { osd::opencl_vertex_buffer::OpenClContext::from_ptr(test_ptr) }.unwrap();
        // Context types can no longer be cloned - they enforce lifetime safety
        // This ensures the GPU resource outlives all references
    }

    #[cfg(feature = "cuda")]
    {
        let context = unsafe { osd::cuda_vertex_buffer::CudaContext::from_ptr(test_ptr) }.unwrap();
        // Context types can no longer be cloned - they enforce lifetime safety
        // This ensures the GPU resource outlives all references
    }
}