Function mmal_sys::mmal_buffer_header_mem_lock

pub unsafe extern "C" fn mmal_buffer_header_mem_lock(
    header: *mut MMAL_BUFFER_HEADER_T
) -> Type

Lock the data buffer contained in the buffer header in memory. This call does nothing on all platforms except VideoCore where it is needed to pin a buffer in memory before any access to it.

@param header buffer header to lock