Struct userfaultfd::FeatureFlags
source · pub struct FeatureFlags(/* private fields */);
Expand description
Used with UffdBuilder
to determine which features are available in the current kernel.
Implementations§
source§impl FeatureFlags
impl FeatureFlags
pub const PAGEFAULT_FLAG_WP: Self = _
pub const EVENT_FORK: Self = _
pub const EVENT_REMAP: Self = _
pub const EVENT_REMOVE: Self = _
pub const MISSING_HUGETLBFS: Self = _
pub const MISSING_SHMEM: Self = _
pub const EVENT_UNMAP: Self = _
source§impl FeatureFlags
impl FeatureFlags
sourcepub const fn bits(&self) -> u64
pub const fn bits(&self) -> u64
Get the underlying bits value.
The returned value is exactly the bits set in this flags value.
sourcepub const fn from_bits(bits: u64) -> Option<Self>
pub const fn from_bits(bits: u64) -> Option<Self>
Convert from a bits value.
This method will return None
if any unknown bits are set.
sourcepub const fn from_bits_truncate(bits: u64) -> Self
pub const fn from_bits_truncate(bits: u64) -> Self
Convert from a bits value, unsetting any unknown bits.
sourcepub const fn from_bits_retain(bits: u64) -> Self
pub const fn from_bits_retain(bits: u64) -> Self
Convert from a bits value exactly.
sourcepub fn from_name(name: &str) -> Option<Self>
pub fn from_name(name: &str) -> Option<Self>
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.
sourcepub const fn intersects(&self, other: Self) -> bool
pub const fn intersects(&self, other: Self) -> bool
Whether any set bits in a source flags value are also set in a target flags value.
sourcepub const fn contains(&self, other: Self) -> bool
pub const fn contains(&self, other: Self) -> bool
Whether all set bits in a source flags value are also set in a target flags value.
sourcepub fn remove(&mut self, other: Self)
pub fn remove(&mut self, other: Self)
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.
sourcepub fn toggle(&mut self, other: Self)
pub fn toggle(&mut self, other: Self)
The bitwise exclusive-or (^
) of the bits in two flags values.
sourcepub fn set(&mut self, other: Self, value: bool)
pub fn set(&mut self, other: Self, value: bool)
Call insert
when value
is true
or remove
when value
is false
.
sourcepub const fn intersection(self, other: Self) -> Self
pub const fn intersection(self, other: Self) -> Self
The bitwise and (&
) of the bits in two flags values.
sourcepub const fn union(self, other: Self) -> Self
pub const fn union(self, other: Self) -> Self
The bitwise or (|
) of the bits in two flags values.
sourcepub const fn difference(self, other: Self) -> Self
pub const fn difference(self, other: Self) -> Self
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.
sourcepub const fn symmetric_difference(self, other: Self) -> Self
pub const fn symmetric_difference(self, other: Self) -> Self
The bitwise exclusive-or (^
) of the bits in two flags values.
sourcepub const fn complement(self) -> Self
pub const fn complement(self) -> Self
The bitwise negation (!
) of the bits in a flags value, truncating the result.
source§impl FeatureFlags
impl FeatureFlags
sourcepub const fn iter(&self) -> Iter<FeatureFlags>
pub const fn iter(&self) -> Iter<FeatureFlags>
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.
sourcepub const fn iter_names(&self) -> IterNames<FeatureFlags>
pub const fn iter_names(&self) -> IterNames<FeatureFlags>
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§
source§impl Binary for FeatureFlags
impl Binary for FeatureFlags
source§impl BitAnd for FeatureFlags
impl BitAnd for FeatureFlags
source§impl BitAndAssign for FeatureFlags
impl BitAndAssign for FeatureFlags
source§fn bitand_assign(&mut self, other: Self)
fn bitand_assign(&mut self, other: Self)
The bitwise and (&
) of the bits in two flags values.
source§impl BitOr for FeatureFlags
impl BitOr for FeatureFlags
source§fn bitor(self, other: FeatureFlags) -> Self
fn bitor(self, other: FeatureFlags) -> Self
The bitwise or (|
) of the bits in two flags values.
§type Output = FeatureFlags
type Output = FeatureFlags
|
operator.source§impl BitOrAssign for FeatureFlags
impl BitOrAssign for FeatureFlags
source§fn bitor_assign(&mut self, other: Self)
fn bitor_assign(&mut self, other: Self)
The bitwise or (|
) of the bits in two flags values.
source§impl BitXor for FeatureFlags
impl BitXor for FeatureFlags
source§impl BitXorAssign for FeatureFlags
impl BitXorAssign for FeatureFlags
source§fn bitxor_assign(&mut self, other: Self)
fn bitxor_assign(&mut self, other: Self)
The bitwise exclusive-or (^
) of the bits in two flags values.
source§impl Clone for FeatureFlags
impl Clone for FeatureFlags
source§fn clone(&self) -> FeatureFlags
fn clone(&self) -> FeatureFlags
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for FeatureFlags
impl Debug for FeatureFlags
source§impl Extend<FeatureFlags> for FeatureFlags
impl Extend<FeatureFlags> for FeatureFlags
source§fn extend<T: IntoIterator<Item = Self>>(&mut self, iterator: T)
fn extend<T: IntoIterator<Item = Self>>(&mut self, iterator: T)
The bitwise or (|
) of the bits in each flags value.
source§fn extend_one(&mut self, item: A)
fn extend_one(&mut self, item: A)
extend_one
)source§fn extend_reserve(&mut self, additional: usize)
fn extend_reserve(&mut self, additional: usize)
extend_one
)source§impl Flags for FeatureFlags
impl Flags for FeatureFlags
source§const FLAGS: &'static [Flag<FeatureFlags>] = _
const FLAGS: &'static [Flag<FeatureFlags>] = _
source§fn from_bits_retain(bits: u64) -> FeatureFlags
fn from_bits_retain(bits: u64) -> FeatureFlags
source§fn from_bits_truncate(bits: Self::Bits) -> Self
fn from_bits_truncate(bits: Self::Bits) -> Self
source§fn from_name(name: &str) -> Option<Self>
fn from_name(name: &str) -> Option<Self>
source§fn iter_names(&self) -> IterNames<Self>
fn iter_names(&self) -> IterNames<Self>
source§fn intersects(&self, other: Self) -> boolwhere
Self: Sized,
fn intersects(&self, other: Self) -> boolwhere
Self: Sized,
source§fn contains(&self, other: Self) -> boolwhere
Self: Sized,
fn contains(&self, other: Self) -> boolwhere
Self: Sized,
source§fn insert(&mut self, other: Self)where
Self: Sized,
fn insert(&mut self, other: Self)where
Self: Sized,
|
) of the bits in two flags values.source§fn remove(&mut self, other: Self)where
Self: Sized,
fn remove(&mut self, other: Self)where
Self: Sized,
&!
). Read moresource§fn toggle(&mut self, other: Self)where
Self: Sized,
fn toggle(&mut self, other: Self)where
Self: Sized,
^
) of the bits in two flags values.source§fn intersection(self, other: Self) -> Self
fn intersection(self, other: Self) -> Self
&
) of the bits in two flags values.source§fn difference(self, other: Self) -> Self
fn difference(self, other: Self) -> Self
&!
). Read moresource§fn symmetric_difference(self, other: Self) -> Self
fn symmetric_difference(self, other: Self) -> Self
^
) of the bits in two flags values.source§fn complement(self) -> Self
fn complement(self) -> Self
!
) of the bits in a flags value, truncating the result.source§impl FromIterator<FeatureFlags> for FeatureFlags
impl FromIterator<FeatureFlags> for FeatureFlags
source§fn from_iter<T: IntoIterator<Item = Self>>(iterator: T) -> Self
fn from_iter<T: IntoIterator<Item = Self>>(iterator: T) -> Self
The bitwise or (|
) of the bits in each flags value.
source§impl Hash for FeatureFlags
impl Hash for FeatureFlags
source§impl IntoIterator for FeatureFlags
impl IntoIterator for FeatureFlags
source§impl LowerHex for FeatureFlags
impl LowerHex for FeatureFlags
source§impl Not for FeatureFlags
impl Not for FeatureFlags
source§impl Octal for FeatureFlags
impl Octal for FeatureFlags
source§impl Ord for FeatureFlags
impl Ord for FeatureFlags
source§fn cmp(&self, other: &FeatureFlags) -> Ordering
fn cmp(&self, other: &FeatureFlags) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
source§impl PartialEq for FeatureFlags
impl PartialEq for FeatureFlags
source§fn eq(&self, other: &FeatureFlags) -> bool
fn eq(&self, other: &FeatureFlags) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for FeatureFlags
impl PartialOrd for FeatureFlags
source§fn partial_cmp(&self, other: &FeatureFlags) -> Option<Ordering>
fn partial_cmp(&self, other: &FeatureFlags) -> Option<Ordering>
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
self
and other
) and is used by the <=
operator. Read moresource§impl PublicFlags for FeatureFlags
impl PublicFlags for FeatureFlags
source§impl Sub for FeatureFlags
impl Sub for FeatureFlags
source§fn sub(self, other: Self) -> Self
fn sub(self, other: Self) -> Self
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 = FeatureFlags
type Output = FeatureFlags
-
operator.source§impl SubAssign for FeatureFlags
impl SubAssign for FeatureFlags
source§fn sub_assign(&mut self, other: Self)
fn sub_assign(&mut self, other: Self)
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.