Function librist_sys::rist_oob_read

pub unsafe extern "C" fn rist_oob_read(
    ctx: *mut rist_ctx, 
    oob_block: *mut *const rist_oob_block
) -> c_int

@brief Reads out-of-band data

Use this API to read out-of-band data from an internal fifo queue instead of the callback

@param ctx RIST context @param[out] oob_block pointer to the rist_oob_block structure @return 0 on success, -1 in case of error.