Struct resources::system_allocator::AllocOptions

pub struct AllocOptions {
    prefetchable: bool,
    max_address: u64,
    alignment: Option<u64>,
    top_down: bool,
}

Memory allocation options.

Fields

prefetchable: bool

max_address: u64

alignment: Option<u64>

top_down: bool

Implementations

impl AllocOptions

pub fn new() -> Self

pub fn prefetchable(&mut self, prefetchable: bool) -> &mut Self

If true, memory may be allocated in a prefetchable/cacheable region. If false, memory must be allocated within a non-prefetechable region, appropriate for device registers. Default: false

pub fn max_address(&mut self, max_address: u64) -> &mut Self

Largest valid address for the end of the allocated region. For example, u32::MAX may be used to allocate a region that is addressable with a 32-bit pointer. Default: u64::MAX

pub fn align(&mut self, alignment: u64) -> &mut Self

Minimum alignment of the allocated address. Default: None (allocation preference of the address allocator pool will be used)

pub fn top_down(&mut self, top_down: bool) -> &mut Self

If true, prefer allocating from the upper end of the region rather than the low end. Default: false

Trait Implementations

impl Clone for AllocOptions

fn clone(&self) -> AllocOptions

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for AllocOptions

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for AllocOptions

fn default() -> Self

Returns the “default value” for a type.

impl Copy for AllocOptions