pub struct Vmar(/* private fields */);
Expand description

An object representing a Zircon virtual memory address region.

As essentially a subtype of Handle, it can be freely interconverted.

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impl Vmar

pub fn allocate( &self, offset: usize, size: usize, flags: VmarFlags ) -> Result<(Vmar, usize), Status>

pub fn map( &self, vmar_offset: usize, vmo: &Vmo, vmo_offset: u64, len: usize, flags: VmarFlags ) -> Result<usize, Status>

pub unsafe fn map_unsafe( &self, vmar_offset: usize, vmo: &Vmo, vmo_offset: u64, len: usize, flags: VmarFlagsExtended ) -> Result<usize, Status>

Directly call zx_vmar_map.

§Safety

This function is unsafe because certain flags to zx_vmar_map may replace an existing mapping which is referenced elsewhere.

pub unsafe fn unmap(&self, addr: usize, len: usize) -> Result<(), Status>

Directly call zx_vmar_unmap.

§Safety

This function is unsafe because unmapping memory regions can arbitrarily cause read, write, and execution errors. Among other things, the caller must ensure that:

  • The region being unmapped will not be accessed after unmapping.
  • All references to memory in the region must be dropped or forgotten prior to calling this method.
  • If the region contained executable code, then code in the region must not be currently executing and may not be executed in the future.

This is not an exhaustive list, as there are many ways to cause memory unsafety with memory mappings.

pub unsafe fn protect( &self, addr: usize, len: usize, flags: VmarFlags ) -> Result<(), Status>

Directly call zx_vmar_protect.

§Safety

This function is unsafe because changing the access protections for memory regions can arbitrarily cause read, write, and execution errors. Among other things, the caller must ensure that if a read, write, or execute permission is removed from a memory region, it must not read, write, or execute it respetively.

This is not an exhaustive list, as there are many ways to cause memory unsafety with memory mappings.

pub unsafe fn destroy(&self) -> Result<(), Status>

Directly call zx_vmar_destroy.

§Safety

This function is unsafe because destroying a region unmaps all of the mappings within it. See Vmar::unmap for more details on how unmapping memory regions can cause memory unsafety.

pub fn info(&self) -> Result<VmarInfo, Status>

Wraps the zx_object_get_info syscall for the ZX_INFO_VMAR topic.

Trait Implementations§

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impl AsHandleRef for Vmar

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fn as_handle_ref(&self) -> Unowned<'_, Handle>

Get a reference to the handle. One important use of such a reference is for object_wait_many.
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fn raw_handle(&self) -> u32

Interpret the reference as a raw handle (an integer type). Two distinct handles will have different raw values (so it can perhaps be used as a key in a data structure).
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fn signal_handle( &self, clear_mask: Signals, set_mask: Signals ) -> Result<(), Status>

Set and clear userspace-accessible signal bits on an object. Wraps the zx_object_signal syscall.
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fn wait_handle( &self, signals: Signals, deadline: Time ) -> Result<Signals, Status>

Waits on a handle. Wraps the zx_object_wait_one syscall.
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fn wait_async_handle( &self, port: &Port, key: u64, signals: Signals, options: WaitAsyncOpts ) -> Result<(), Status>

Causes packet delivery on the given port when the object changes state and matches signals. zx_object_wait_async syscall.
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fn get_name(&self) -> Result<CString, Status>

Get the [Property::NAME] property for this object. Read more
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fn set_name(&self, name: &CStr) -> Result<(), Status>

Set the [Property::NAME] property for this object. Read more
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fn basic_info(&self) -> Result<HandleBasicInfo, Status>

Wraps the zx_object_get_info syscall for the ZX_INFO_HANDLE_BASIC topic.
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fn count_info(&self) -> Result<HandleCountInfo, Status>

Wraps the zx_object_get_info syscall for the ZX_INFO_HANDLE_COUNT topic.
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fn get_koid(&self) -> Result<Koid, Status>

Returns the koid (kernel object ID) for this handle.
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impl Debug for Vmar

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

Formats the value using the given formatter. Read more
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impl From<Handle> for Vmar

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fn from(handle: Handle) -> Vmar

Converts to this type from the input type.
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impl From<Vmar> for Handle

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fn from(x: Vmar) -> Handle

Converts to this type from the input type.
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impl HandleBased for Vmar

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fn duplicate_handle(&self, rights: Rights) -> Result<Self, Status>

Duplicate a handle, possibly reducing the rights available. Wraps the zx_handle_duplicate syscall.
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fn replace_handle(self, rights: Rights) -> Result<Self, Status>

Create a replacement for a handle, possibly reducing the rights available. This invalidates the original handle. Wraps the zx_handle_replace syscall.
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fn into_handle(self) -> Handle

Converts the value into its inner handle. Read more
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fn into_raw(self) -> u32

Converts the handle into it’s raw representation. Read more
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fn from_handle(handle: Handle) -> Self

Creates an instance of this type from a handle. Read more
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fn into_handle_based<H>(self) -> H
where H: HandleBased,

Creates an instance of another handle-based type from this value’s inner handle.
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fn from_handle_based<H>(h: H) -> Self
where H: HandleBased,

Creates an instance of this type from the inner handle of another handle-based type.
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fn is_invalid_handle(&self) -> bool

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impl Hash for Vmar

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fn hash<__H>(&self, state: &mut __H)
where __H: Hasher,

Feeds this value into the given Hasher. Read more
1.3.0 · source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl Ord for Vmar

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fn cmp(&self, other: &Vmar) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · source§

fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
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impl PartialEq for Vmar

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fn eq(&self, other: &Vmar) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl PartialOrd for Vmar

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fn partial_cmp(&self, other: &Vmar) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · source§

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl Eq for Vmar

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impl StructuralPartialEq for Vmar

Auto Trait Implementations§

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impl RefUnwindSafe for Vmar

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impl Send for Vmar

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impl Sync for Vmar

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impl Unpin for Vmar

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impl UnwindSafe for Vmar

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T, const OBJECT_TYPE: u32, const RIGHTS: u32> Decode<HandleType<T, OBJECT_TYPE, RIGHTS>> for T
where T: 'static + HandleBased,

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fn new_empty() -> T

Creates a valid instance of Self. The specific value does not matter, since it will be overwritten by decode.
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unsafe fn decode( &mut self, decoder: &mut Decoder<'_>, offset: usize, _depth: Depth ) -> Result<(), Error>

Decodes an object of type T from the decoder’s buffers into self. Read more
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impl<T> Encode<Ambiguous1> for T

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unsafe fn encode( self, _encoder: &mut Encoder<'_>, _offset: usize, _depth: Depth ) -> Result<(), Error>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID. Read more
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impl<T> Encode<Ambiguous2> for T

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unsafe fn encode( self, _encoder: &mut Encoder<'_>, _offset: usize, _depth: Depth ) -> Result<(), Error>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID. Read more
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impl<T, const OBJECT_TYPE: u32, const RIGHTS: u32> Encode<HandleType<T, OBJECT_TYPE, RIGHTS>> for T
where T: 'static + HandleBased,

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unsafe fn encode( self, encoder: &mut Encoder<'_>, offset: usize, _depth: Depth ) -> Result<(), Error>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a [WithDispatch] wrapper. Read more