Function magma_buffer_clean_cache 

pub unsafe extern "C" fn magma_buffer_clean_cache(
    buffer: magma_buffer_t,
    offset: u64,
    size: u64,
    operation: magma_cache_operation_t,
) -> magma_status_t

\brief Cleans, and optionally invalidates, the cache for the region of memory specified by the given buffer, offset, and size, and write the contents to ram. \param buffer A valid buffer. \param offset An offset into the buffer. Must be less than or equal to the buffer’s size. \param size Size of region to be cleaned. Offset + size must be less than or equal to the buffer’s size. \param operation One of MAGMA_CACHE_OPERATION_CLEAN or MAGMA_CACHE_OPERATION_CLEAN_INVALIDATE.