Struct FSItemDeactivationOptions

#[repr(transparent)]
pub struct FSItemDeactivationOptions(pub NSUInteger);

Available on crate feature FSVolume only.

Options to specify the item deactivation policy.

Callers may want to set a deactivation policy because FSVolume/ItemDeactivation/deactivateItem(_:replyHandler:) processing blocks the kernel. Setting a deactivation policy allows the file system to take action at a definitive point in the item’s life cycle. These options allow the file system to instruct the FSKit kernel of which circumstances require the expense of a round-trip call to the module.

Note: To avoid performing deactivation calls, Objective-C developers use the value FSItemDeactivationNever. In Swift, use an empty option set ([]).

See also Apple’s documentation

Tuple Fields

0: NSUInteger

Implementations

impl FSItemDeactivationOptions

pub const Never: Self

An option to never perform deactivation.

With this deactivation option, FSKit never issues deactivateItem calls, even though the volume conforms to FSVolume/ItemDeactivation.

pub const Always: Self

An option to always perform deactivation calls.

Use this option if the file system needs deactivateItem calls in circumstances beyond those covered by forRemovedItems and forPreallocatedItems.

pub const ForRemovedItems: Self

An option to process deactivation for open-unlinked items at the moment of last close.

pub const ForPreallocatedItems: Self

An option to process deactivation for for files with preallocated space.

This option facilitates a sort of trim-on-close behavior. It is only meaningful for volumes that conform to FSVolume/PreallocateOperations.

impl FSItemDeactivationOptions

pub const fn empty() -> Self

Get a flags value with all bits unset.

pub const fn all() -> Self

Get a flags value with all known bits set.

pub const fn bits(&self) -> NSUInteger

Get the underlying bits value.

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

pub const fn from_bits(bits: NSUInteger) -> Option<Self>

Convert from a bits value.

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

pub const fn from_bits_truncate(bits: NSUInteger) -> Self

Convert from a bits value, unsetting any unknown bits.

pub const fn from_bits_retain(bits: NSUInteger) -> Self

Convert from a bits value exactly.

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.

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: Self) -> bool

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

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.

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

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

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.

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

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

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

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

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

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

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

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

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.

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

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

pub const fn complement(self) -> Self

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

impl FSItemDeactivationOptions

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

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<FSItemDeactivationOptions>

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 FSItemDeactivationOptions

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

Formats the value using the given formatter.

impl BitAnd for FSItemDeactivationOptions

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

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

type Output = FSItemDeactivationOptions

The resulting type after applying the & operator.

impl BitAndAssign for FSItemDeactivationOptions

fn bitand_assign(&mut self, other: Self)

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

impl BitOr for FSItemDeactivationOptions

fn bitor(self, other: FSItemDeactivationOptions) -> Self

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

type Output = FSItemDeactivationOptions

The resulting type after applying the | operator.

impl BitOrAssign for FSItemDeactivationOptions

fn bitor_assign(&mut self, other: Self)

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

impl BitXor for FSItemDeactivationOptions

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

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

type Output = FSItemDeactivationOptions

The resulting type after applying the ^ operator.

impl BitXorAssign for FSItemDeactivationOptions

fn bitxor_assign(&mut self, other: Self)

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

impl Clone for FSItemDeactivationOptions

fn clone(&self) -> FSItemDeactivationOptions

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FSItemDeactivationOptions

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

Formats the value using the given formatter.

impl Encode for FSItemDeactivationOptions

const ENCODING: Encoding = NSUInteger::ENCODING

The Objective-C type-encoding for this type.

impl Extend<FSItemDeactivationOptions> for FSItemDeactivationOptions

fn extend<T: IntoIterator<Item = Self>>(&mut self, iterator: T)

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 FSItemDeactivationOptions

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

The set of defined flags.

type Bits = usize

The underlying bits type.

fn bits(&self) -> NSUInteger

Get the underlying bits value.

fn from_bits_retain(bits: NSUInteger) -> FSItemDeactivationOptions

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 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 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<FSItemDeactivationOptions> for FSItemDeactivationOptions

fn from_iter<T: IntoIterator<Item = Self>>(iterator: T) -> Self

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

impl Hash for FSItemDeactivationOptions

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

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 FSItemDeactivationOptions

type Item = FSItemDeactivationOptions

The type of the elements being iterated over.

type IntoIter = Iter<FSItemDeactivationOptions>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl LowerHex for FSItemDeactivationOptions

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

Formats the value using the given formatter.

impl Not for FSItemDeactivationOptions

fn not(self) -> Self

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

type Output = FSItemDeactivationOptions

The resulting type after applying the ! operator.

impl Octal for FSItemDeactivationOptions

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

Formats the value using the given formatter.

impl Ord for FSItemDeactivationOptions

fn cmp(&self, other: &FSItemDeactivationOptions) -> 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 FSItemDeactivationOptions

fn eq(&self, other: &FSItemDeactivationOptions) -> 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 FSItemDeactivationOptions

fn partial_cmp(&self, other: &FSItemDeactivationOptions) -> 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 RefEncode for FSItemDeactivationOptions

const ENCODING_REF: Encoding

The Objective-C type-encoding for a reference of this type.

impl Sub for FSItemDeactivationOptions

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 = FSItemDeactivationOptions

The resulting type after applying the - operator.

impl SubAssign for FSItemDeactivationOptions

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.

impl UpperHex for FSItemDeactivationOptions

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

Formats the value using the given formatter.

impl Copy for FSItemDeactivationOptions

impl Eq for FSItemDeactivationOptions

impl StructuralPartialEq for FSItemDeactivationOptions