Struct syscall::flag::PhysallocFlags

pub struct PhysallocFlags { /* private fields */ }

Extra flags for physalloc2 or physalloc3.

Implementations

impl PhysallocFlags

pub const SPACE_32: Self = _

Only allocate memory within the 32-bit physical memory space. This is necessary for some devices may not support 64-bit memory.

pub const SPACE_64: Self = _

The frame that will be allocated, is going to reside anywhere in 64-bit space. This flag is redundant for the most part, except when overriding some other default.

pub const PARTIAL_ALLOC: Self = _

Do a “partial allocation”, which means that not all of the frames specified in the frame count size actually have to be allocated. This means that if the allocator was unable to find a physical memory range large enough, it can instead return whatever range it decides is optimal. Thus, instead of letting one driver get an expensive 128MiB physical memory range when the physical memory has become fragmented, and failing, it can instead be given a more optimal range. If the device supports scatter-gather lists, then the driver only has to allocate more ranges, and the device will do vectored I/O.

PARTIAL_ALLOC supports different allocation strategies, refer to Optimal, GreatestRange.

pub const fn empty() -> Self

Returns an empty set of flags.

pub const fn all() -> Self

Returns the set containing all flags.

pub const fn bits(&self) -> usize

Returns the raw value of the flags currently stored.

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

Convert from underlying bit representation, unless that representation contains bits that do not correspond to a flag.

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

Convert from underlying bit representation, dropping any bits that do not correspond to flags.

pub const unsafe fn from_bits_unchecked(bits: usize) -> Self

Convert from underlying bit representation, preserving all bits (even those not corresponding to a defined flag).

Safety

The caller of the bitflags! macro can chose to allow or disallow extra bits for their bitflags type.

The caller of from_bits_unchecked() has to ensure that all bits correspond to a defined flag or that extra bits are valid for this bitflags type.

pub const fn is_empty(&self) -> bool

Returns true if no flags are currently stored.

pub const fn is_all(&self) -> bool

Returns true if all flags are currently set.

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

Returns true if there are flags common to both self and other.

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

Returns true if all of the flags in other are contained within self.

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

Inserts the specified flags in-place.

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

Removes the specified flags in-place.

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

Toggles the specified flags in-place.

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

Inserts or removes the specified flags depending on the passed value.

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

Returns the intersection between the flags in self and other.

Specifically, the returned set contains only the flags which are present in both self and other.

This is equivalent to using the & operator (e.g. ops::BitAnd), as in flags & other.

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

Returns the union of between the flags in self and other.

Specifically, the returned set contains all flags which are present in either self or other, including any which are present in both (see Self::symmetric_difference if that is undesirable).

This is equivalent to using the | operator (e.g. ops::BitOr), as in flags | other.

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

Returns the difference between the flags in self and other.

Specifically, the returned set contains all flags present in self, except for the ones present in other.

It is also conceptually equivalent to the “bit-clear” operation: flags & !other (and this syntax is also supported).

This is equivalent to using the - operator (e.g. ops::Sub), as in flags - other.

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

Returns the symmetric difference between the flags in self and other.

Specifically, the returned set contains the flags present which are present in self or other, but that are not present in both. Equivalently, it contains the flags present in exactly one of the sets self and other.

This is equivalent to using the ^ operator (e.g. ops::BitXor), as in flags ^ other.

pub const fn complement(self) -> Self

Returns the complement of this set of flags.

Specifically, the returned set contains all the flags which are not set in self, but which are allowed for this type.

Alternatively, it can be thought of as the set difference between Self::all() and self (e.g. Self::all() - self)

This is equivalent to using the ! operator (e.g. ops::Not), as in !flags.

Trait Implementations

impl Binary for PhysallocFlags

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

Formats the value using the given formatter.

impl BitAnd<PhysallocFlags> for PhysallocFlags

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

Returns the intersection between the two sets of flags.

type Output = PhysallocFlags

The resulting type after applying the & operator.

impl BitAndAssign<PhysallocFlags> for PhysallocFlags

fn bitand_assign(&mut self, other: Self)

Disables all flags disabled in the set.

impl BitOr<PhysallocFlags> for PhysallocFlags

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

Returns the union of the two sets of flags.

type Output = PhysallocFlags

The resulting type after applying the | operator.

impl BitOrAssign<PhysallocFlags> for PhysallocFlags

fn bitor_assign(&mut self, other: Self)

Adds the set of flags.

impl BitXor<PhysallocFlags> for PhysallocFlags

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

Returns the left flags, but with all the right flags toggled.

type Output = PhysallocFlags

The resulting type after applying the ^ operator.

impl BitXorAssign<PhysallocFlags> for PhysallocFlags

fn bitxor_assign(&mut self, other: Self)

Toggles the set of flags.

impl Clone for PhysallocFlags

fn clone(&self) -> PhysallocFlags

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for PhysallocFlags

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

Formats the value using the given formatter.

impl Default for PhysallocFlags

fn default() -> PhysallocFlags

Returns the “default value” for a type.

impl Extend<PhysallocFlags> for PhysallocFlags

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

Extends a collection with the contents of an iterator.

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 FromIterator<PhysallocFlags> for PhysallocFlags

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

Creates a value from an iterator.

impl Hash for PhysallocFlags

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, 

Feeds a slice of this type into the given Hasher.

impl LowerHex for PhysallocFlags

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

Formats the value using the given formatter.

impl Not for PhysallocFlags

fn not(self) -> Self

Returns the complement of this set of flags.

type Output = PhysallocFlags

The resulting type after applying the ! operator.

impl Octal for PhysallocFlags

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

Formats the value using the given formatter.

impl Ord for PhysallocFlags

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

This method returns an Ordering between self and other.

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

Compares and returns the maximum of two values.

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

Compares and returns the minimum of two values.

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

Restrict a value to a certain interval.

impl PartialEq<PhysallocFlags> for PhysallocFlags

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl PartialOrd<PhysallocFlags> for PhysallocFlags

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

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

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

This method tests less than (for self and other) and is used by the < operator.

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

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

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

This method tests greater than (for self and other) and is used by the > operator.

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

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

impl Sub<PhysallocFlags> for PhysallocFlags

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

Returns the set difference of the two sets of flags.

type Output = PhysallocFlags

The resulting type after applying the - operator.

impl SubAssign<PhysallocFlags> for PhysallocFlags

fn sub_assign(&mut self, other: Self)

Disables all flags enabled in the set.

impl UpperHex for PhysallocFlags

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

Formats the value using the given formatter.

impl Copy for PhysallocFlags

impl Eq for PhysallocFlags

impl StructuralEq for PhysallocFlags

impl StructuralPartialEq for PhysallocFlags