Function pomp_buffer_new_get_data 

pub unsafe extern "C" fn pomp_buffer_new_get_data(
    capacity: usize,
    data: *mut *mut c_void,
) -> *mut pomp_buffer

Same as pomp_buffer_new but retrieved internal data pointer at the same time. @param capacity : initial capacity of the buffer. @param data : data of buffer (optional can be NULL). @return new buffer with initial ref count at 1 or NULL in case of error.