Struct CachedVmoMemory 

pub struct CachedVmoMemory(/* private fields */);

A wrapper around VmoMemory guaranteed to be mapped with cached memory policy.

Implementations

impl CachedVmoMemory

pub unsafe fn new_unchecked(inner: VmoMemory) -> Self

Creates a new cached vmo memory from mapped memory.

Safety

The caller must ensure that the mapped VMO is mapped with zx::CachePolicy::Cached.

pub fn get(&self) -> &VmoMemory

Returns the contained mapped VMO.

pub fn map( offset: usize, size: usize, vmo: Vmo, ) -> Result<MmioRegion<Self>, Status>

Maps vmo at offset with size ensuring the correct cache policy.

pub fn new_mapped(size: usize) -> Result<MmioRegion<Self>, Status>

Creates a new VMO of size bytes and maps it into memory with cached cache policy.

Trait Implementations

impl UnsafeMmio for CachedVmoMemory

fn len(&self) -> usize

Returns the size, in bytes, of the underlying MMIO region that can be accessed through this object.

fn align_offset(&self, align: usize) -> usize

Returns the first offset into this MMIO region that is suitably aligned foralign.

unsafe fn load8_unchecked(&self, offset: usize) -> u8

Loads a u8 from this MMIO region at the given offset.

unsafe fn load16_unchecked(&self, offset: usize) -> u16

Loads a u16 from this MMIO region at the given offset.

unsafe fn load32_unchecked(&self, offset: usize) -> u32

Loads a u32 from this MMIO region at the given offset.

unsafe fn load64_unchecked(&self, offset: usize) -> u64

Loads a u64 from this MMIO region at the given offset.

unsafe fn store8_unchecked(&self, offset: usize, v: u8)

Stores a u8 to this MMIO region at the given offset.

unsafe fn store16_unchecked(&self, offset: usize, v: u16)

Stores a u16 to this MMIO region at the given offset.

unsafe fn store32_unchecked(&self, offset: usize, v: u32)

Stores a u32 to this MMIO region at the given offset.

unsafe fn store64_unchecked(&self, offset: usize, v: u64)

Stores a u64 to this MMIO region at the given offset.

fn write_barrier(&self)

Issues a memory write barrier. It is guaranteed that all stores preceding this barrier will appear to have happened before all stores following this barrier.

fn read_barrier(&self)

Issues a memory read barrier. It is guaranteed that all loads preceding this barrier will appear to have happened before all loads following this barrier.

fn is_empty(&self) -> bool

Returns true if the MMIO region has a length of 0.