Struct VmoMemory 

pub struct VmoMemory<H> { /* private fields */ }

A wrapper around an UnsafeMmio underlying storage that permits injecting behavior on reads and writes to the underlying VMO.

The H handler type is an implementation of VmoMemoryHandler, which is tailored specifically for intersecting loads and stores to the underlying VMO.

Note that VmoMemory always operates on CachedVmoMemory, since the fakes are running in the same process as the test, and there’s no device/peripheral memory in play.

Implementations

impl<H: VmoMemoryWrapper> VmoMemory<H>

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

Maps a zx::Vmo into memory and wraps the resulting VmoMemory inside VmoMemory.

impl<H> VmoMemory<H>

pub fn new(handler: H, vmo: CachedVmoMemory) -> Self

Creates a new VmoMemory with the provided handler and backing vmo.

Trait Implementations

impl<H: VmoMemoryHandler> UnsafeMmio for VmoMemory<H>

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.

impl<H: VmoMemoryWrapper> VmoMapper for VmoMemory<H>

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

Map the specified memory range of the given Vmo in the root Vmar for this process and return an object that maintains the mapping for its lifetime.