Struct DeviceFlag 

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

Implementations

impl DeviceFlag

pub const READONLY: DeviceFlag

All writes to the block device will fail.

pub const REMOVABLE: DeviceFlag

The block device may be removed from the device during operation.

pub const TRIM_SUPPORT: DeviceFlag

The device provides trim support.

pub const FUA_SUPPORT: DeviceFlag

The device provides Force Unit Access (FUA) support.

If this bit is unset, and a request is sent with the FORCE_ACCESS option set, the device will simulate a FUA by executing a device flush after the request completes (but before responding to the client). Clients are strongly encouraged to probe for FUA support and avoid usage of FORCE_ACCESS without device support, since this is expensive.

pub const ZSTD_DECOMPRESSION_SUPPORT: DeviceFlag

The device provides zstd decompression support.

pub const BARRIER_SUPPORT: DeviceFlag

The device provides Barrier support.

If this bit is unset, and a request is sent with the PRE_BARRIER option set, the device will simulate a barrier by executing a device flush before the request is submitted. Clients are strongly encouraged to probe for barrier support and avoid usage of PRE_BARRIER without device support, since this is expensive.

impl DeviceFlag

pub const fn empty() -> DeviceFlag

Get a flags value with all bits unset.

pub const fn all() -> DeviceFlag

Get a flags value with all known bits set.

pub const fn bits(&self) -> u32

Get the underlying bits value.

The returned value is exactly the bits set in this flags value.

pub const fn from_bits(bits: u32) -> Option<DeviceFlag>

Convert from a bits value.

This method will return None if any unknown bits are set.

pub const fn from_bits_truncate(bits: u32) -> DeviceFlag

Convert from a bits value, unsetting any unknown bits.

pub const fn from_bits_retain(bits: u32) -> DeviceFlag

Convert from a bits value exactly.

pub fn from_name(name: &str) -> Option<DeviceFlag>

Get a flags value with the bits of a flag with the given name set.

This method will return None if name is empty or doesn’t correspond to any named flag.

pub const fn is_empty(&self) -> bool

Whether all bits in this flags value are unset.

pub const fn is_all(&self) -> bool

Whether all known bits in this flags value are set.

pub const fn intersects(&self, other: DeviceFlag) -> bool

Whether any set bits in a source flags value are also set in a target flags value.

pub const fn contains(&self, other: DeviceFlag) -> bool

Whether all set bits in a source flags value are also set in a target flags value.

pub fn insert(&mut self, other: DeviceFlag)

The bitwise or (|) of the bits in two flags values.

pub fn remove(&mut self, other: DeviceFlag)

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. remove won’t truncate other, but the ! operator will.

pub fn toggle(&mut self, other: DeviceFlag)

The bitwise exclusive-or (^) of the bits in two flags values.

pub fn set(&mut self, other: DeviceFlag, value: bool)

Call insert when value is true or remove when value is false.

pub const fn intersection(self, other: DeviceFlag) -> DeviceFlag

The bitwise and (&) of the bits in two flags values.

pub const fn union(self, other: DeviceFlag) -> DeviceFlag

The bitwise or (|) of the bits in two flags values.

pub const fn difference(self, other: DeviceFlag) -> DeviceFlag

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. difference won’t truncate other, but the ! operator will.

pub const fn symmetric_difference(self, other: DeviceFlag) -> DeviceFlag

The bitwise exclusive-or (^) of the bits in two flags values.

pub const fn complement(self) -> DeviceFlag

The bitwise negation (!) of the bits in a flags value, truncating the result.

impl DeviceFlag

pub const fn iter(&self) -> Iter<DeviceFlag>

Yield a set of contained flags values.

Each yielded flags value will correspond to a defined named flag. Any unknown bits will be yielded together as a final flags value.

pub const fn iter_names(&self) -> IterNames<DeviceFlag>

Yield a set of contained named flags values.

This method is like iter, except only yields bits in contained named flags. Any unknown bits, or bits not corresponding to a contained flag will not be yielded.

Trait Implementations

impl Binary for DeviceFlag

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

Formats the value using the given formatter.

impl BitAnd for DeviceFlag

fn bitand(self, other: DeviceFlag) -> DeviceFlag

The bitwise and (&) of the bits in two flags values.

type Output = DeviceFlag

The resulting type after applying the & operator.

impl BitAndAssign for DeviceFlag

fn bitand_assign(&mut self, other: DeviceFlag)

The bitwise and (&) of the bits in two flags values.

impl BitOr for DeviceFlag

fn bitor(self, other: DeviceFlag) -> DeviceFlag

The bitwise or (|) of the bits in two flags values.

type Output = DeviceFlag

The resulting type after applying the | operator.

impl BitOrAssign for DeviceFlag

fn bitor_assign(&mut self, other: DeviceFlag)

The bitwise or (|) of the bits in two flags values.

impl BitXor for DeviceFlag

fn bitxor(self, other: DeviceFlag) -> DeviceFlag

The bitwise exclusive-or (^) of the bits in two flags values.

type Output = DeviceFlag

The resulting type after applying the ^ operator.

impl BitXorAssign for DeviceFlag

fn bitxor_assign(&mut self, other: DeviceFlag)

The bitwise exclusive-or (^) of the bits in two flags values.

impl Clone for DeviceFlag

fn clone(&self) -> DeviceFlag

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DeviceFlag

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

Formats the value using the given formatter.

impl<D> Decode<DeviceFlag, D> for DeviceFlag

where D: ResourceDialect,

fn new_empty() -> DeviceFlag

Creates a valid instance of Self. The specific value does not matter, since it will be overwritten by decode.

unsafe fn decode( &mut self, decoder: &mut Decoder<'_, D>, offset: usize, _depth: Depth, ) -> Result<(), Error>

Decodes an object of type T from the decoder’s buffers into self.

impl Default for DeviceFlag

fn default() -> DeviceFlag

Returns the “default value” for a type.

impl<D> Encode<DeviceFlag, D> for DeviceFlag

where D: ResourceDialect,

unsafe fn encode( self, encoder: &mut Encoder<'_, D>, 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.

impl Extend<DeviceFlag> for DeviceFlag

fn extend<T>(&mut self, iterator: T)

where T: IntoIterator<Item = DeviceFlag>,

The bitwise or (|) of the bits in each flags value.

fn extend_one(&mut self, item: A)

🔬This is a nightly-only experimental API. (extend_one)

Extends a collection with exactly one element.

fn extend_reserve(&mut self, additional: usize)

🔬This is a nightly-only experimental API. (extend_one)

Reserves capacity in a collection for the given number of additional elements.

impl Flags for DeviceFlag

const FLAGS: &'static [Flag<DeviceFlag>]

The set of defined flags.

type Bits = u32

The underlying bits type.

fn bits(&self) -> u32

Get the underlying bits value.

fn from_bits_retain(bits: u32) -> DeviceFlag

Convert from a bits value exactly.

fn empty() -> Self

Get a flags value with all bits unset.

fn all() -> Self

Get a flags value with all known bits set.

fn known_bits(&self) -> Self::Bits

Get the known bits from a flags value.

fn unknown_bits(&self) -> Self::Bits

Get the unknown bits from a flags value.

fn contains_unknown_bits(&self) -> bool

This method will return true if any unknown bits are set.

fn from_bits(bits: Self::Bits) -> Option<Self>

Convert from a bits value.

fn from_bits_truncate(bits: Self::Bits) -> Self

Convert from a bits value, unsetting any unknown bits.

fn from_name(name: &str) -> Option<Self>

Get a flags value with the bits of a flag with the given name set.

fn iter(&self) -> Iter<Self>

Yield a set of contained flags values.

fn iter_names(&self) -> IterNames<Self>

Yield a set of contained named flags values.

fn iter_defined_names() -> IterDefinedNames<Self>

Yield a set of all named flags defined by Self::FLAGS.

fn is_empty(&self) -> bool

Whether all bits in this flags value are unset.

fn is_all(&self) -> bool

Whether all known bits in this flags value are set.

fn intersects(&self, other: Self) -> bool

where Self: Sized,

Whether any set bits in a source flags value are also set in a target flags value.

fn contains(&self, other: Self) -> bool

where Self: Sized,

Whether all set bits in a source flags value are also set in a target flags value.

fn truncate(&mut self)

where Self: Sized,

Remove any unknown bits from the flags.

fn insert(&mut self, other: Self)

where Self: Sized,

The bitwise or (|) of the bits in two flags values.

fn remove(&mut self, other: Self)

where Self: Sized,

The intersection of a source flags value with the complement of a target flags value (&!).

fn toggle(&mut self, other: Self)

where Self: Sized,

The bitwise exclusive-or (^) of the bits in two flags values.

fn set(&mut self, other: Self, value: bool)

where Self: Sized,

Call Flags::insert when value is true or Flags::remove when value is false.

fn clear(&mut self)

where Self: Sized,

Unsets all bits in the flags.

fn intersection(self, other: Self) -> Self

The bitwise and (&) of the bits in two flags values.

fn union(self, other: Self) -> Self

The bitwise or (|) of the bits in two flags values.

fn difference(self, other: Self) -> Self

The intersection of a source flags value with the complement of a target flags value (&!).

fn symmetric_difference(self, other: Self) -> Self

The bitwise exclusive-or (^) of the bits in two flags values.

fn complement(self) -> Self

The bitwise negation (!) of the bits in a flags value, truncating the result.

impl FromIterator<DeviceFlag> for DeviceFlag

fn from_iter<T>(iterator: T) -> DeviceFlag

where T: IntoIterator<Item = DeviceFlag>,

The bitwise or (|) of the bits in each flags value.

impl Hash for DeviceFlag

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

where __H: Hasher,

Feeds this value into the given Hasher.

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

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl IntoIterator for DeviceFlag

type Item = DeviceFlag

The type of the elements being iterated over.

type IntoIter = Iter<DeviceFlag>

Which kind of iterator are we turning this into?

fn into_iter(self) -> <DeviceFlag as IntoIterator>::IntoIter

Creates an iterator from a value.

impl LowerHex for DeviceFlag

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

Formats the value using the given formatter.

impl Not for DeviceFlag

fn not(self) -> DeviceFlag

The bitwise negation (!) of the bits in a flags value, truncating the result.

type Output = DeviceFlag

The resulting type after applying the ! operator.

impl Octal for DeviceFlag

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

Formats the value using the given formatter.

impl Ord for DeviceFlag

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

This method returns an Ordering between self and other.

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

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for DeviceFlag

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for DeviceFlag

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

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Sub for DeviceFlag

fn sub(self, other: DeviceFlag) -> DeviceFlag

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. difference won’t truncate other, but the ! operator will.

type Output = DeviceFlag

The resulting type after applying the - operator.

impl SubAssign for DeviceFlag

fn sub_assign(&mut self, other: DeviceFlag)

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. difference won’t truncate other, but the ! operator will.

impl TypeMarker for DeviceFlag

type Owned = DeviceFlag

The owned Rust type which this FIDL type decodes into.

fn inline_align(_context: Context) -> usize

Returns the minimum required alignment of the inline portion of the encoded object. It must be a (nonzero) power of two.

fn inline_size(_context: Context) -> usize

Returns the size of the inline portion of the encoded object, including padding for alignment. Must be a multiple of inline_align.

fn encode_is_copy() -> bool

Returns true if the memory layout of Self::Owned matches the FIDL wire format and encoding requires no validation. When true, we can optimize encoding arrays and vectors of Self::Owned to a single memcpy.

fn decode_is_copy() -> bool

Returns true if the memory layout of Self::Owned matches the FIDL wire format and decoding requires no validation. When true, we can optimize decoding arrays and vectors of Self::Owned to a single memcpy.

impl UpperHex for DeviceFlag

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

Formats the value using the given formatter.

impl ValueTypeMarker for DeviceFlag

type Borrowed<'a> = DeviceFlag

The Rust type to use for encoding. This is a particular Encode<Self> type cheaply obtainable from &Self::Owned. There are three cases:

fn borrow( value: &<DeviceFlag as TypeMarker>::Owned, ) -> <DeviceFlag as ValueTypeMarker>::Borrowed<'_>

Cheaply converts from &Self::Owned to Self::Borrowed.

impl Copy for DeviceFlag

impl Eq for DeviceFlag

impl StructuralPartialEq for DeviceFlag