Struct virtio_device::ring::Desc

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#[repr(C)]
pub struct Desc { /* private fields */ }
Expand description

Virtio descriptor data structure

Represents the in memory format of virtio descriptors and provides some accessors.

Implementations§

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impl Desc

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pub fn has_next(&self) -> bool

Returns whether the next bit is set.

Typically the next method is preferred.

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pub fn is_indirect(&self) -> bool

Returns whether the indirect bit is set.

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pub fn write_only(&self) -> bool

Returns whether the write bit is set.

This flag should be ignored when is_indirect is true.

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pub fn access_type(&self) -> DescAccess

Return the descriptor access type.

This is a convenience wrapper around write_only to provide a safer type.

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pub fn next(&self) -> Option<u16>

Returns the next descriptor if there is one, otherwise a None.

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pub fn data(&self) -> (u64, u32)

Returns the guest (address, length) pair representing the contents of this descriptor.

No validation of the address and length is performed. In particular the range could be invalid or wrap.

Trait Implementations§

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impl Clone for Desc

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fn clone(&self) -> Desc

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Desc

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

Formats the value using the given formatter. Read more
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impl TryFrom<Desc> for Desc

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type Error = DescError

The type returned in the event of a conversion error.
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fn try_from(desc: Desc) -> Result<Self, Self::Error>

Performs the conversion.
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impl Copy for Desc

Auto Trait Implementations§

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impl RefUnwindSafe for Desc

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impl Send for Desc

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impl Sync for Desc

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impl Unpin for Desc

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impl UnwindSafe for Desc

Blanket Implementations§

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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> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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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> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. 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.