Struct mmap_rs::MmapFlags

pub struct MmapFlags { /* private fields */ }

The available flags to configure the allocated mapping.

Implementations

impl MmapFlags

pub const SHARED: Self = _

Maps the pages as shared such that any modifcations are visible between processes.

When mapping a file without specifying this flag, the pages may initially be mapped as shared, but a private copy will be created when any process writes to the memory mapping, such that any modification is not visible to other processes.

pub const POPULATE: Self = _

Ensure the allocated pages are populated, such that they do not cause page faults.

pub const NO_RESERVE: Self = _

Do not reserve swap space for this allocation.

This flag acts as a no-op on platforms that do not support this feature.

pub const HUGE_PAGES: Self = _

Use huge pages for this allocation.

pub const STACK: Self = _

The region grows downward like a stack on certain Unix platforms (e.g. FreeBSD).

This flag acts as a no-op on platforms that do not support this feature.

pub const NO_CORE_DUMP: Self = _

The pages will not be included in a core dump.

This flag acts as a no-op on platforms that do not support this feature.

pub const LOCKED: Self = _

Lock the physical memory to prevent page faults from happening when accessing the pages.

pub const TRANSPARENT_HUGE_PAGES: Self = _

Suggest to use transparent huge pages for this allocation by calling madvise().

This flag acts as a no-op on platforms that do not support this feature.

pub const SEQUENTIAL: Self = _

Suggest that the mapped region will be accessed sequentially by calling madvise().

This flag acts as a no-op on platforms that do not support this feature.

pub const RANDOM_ACCESS: Self = _

Suggest that the mapped region will be accessed randomly by calling madvise().

This flag acts as a no-op on platforms that do not support this feature.

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) -> u32

Returns the raw value of the flags currently stored.

pub const fn from_bits(bits: u32) -> 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: u32) -> Self

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

pub const unsafe fn from_bits_unchecked(bits: u32) -> 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 MmapFlags

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

Formats the value using the given formatter.

impl BitAnd for MmapFlags

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

Returns the intersection between the two sets of flags.

type Output = MmapFlags

The resulting type after applying the & operator.

impl BitAndAssign for MmapFlags

fn bitand_assign(&mut self, other: Self)

Disables all flags disabled in the set.

impl BitOr for MmapFlags

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

Returns the union of the two sets of flags.

type Output = MmapFlags

The resulting type after applying the | operator.

impl BitOrAssign for MmapFlags

fn bitor_assign(&mut self, other: Self)

Adds the set of flags.

impl BitXor for MmapFlags

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

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

type Output = MmapFlags

The resulting type after applying the ^ operator.

impl BitXorAssign for MmapFlags

fn bitxor_assign(&mut self, other: Self)

Toggles the set of flags.

impl Clone for MmapFlags

fn clone(&self) -> MmapFlags

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for MmapFlags

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

Formats the value using the given formatter.

impl Extend<MmapFlags> for MmapFlags

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<MmapFlags> for MmapFlags

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

Creates a value from an iterator.

impl Hash for MmapFlags

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 LowerHex for MmapFlags

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

Formats the value using the given formatter.

impl Not for MmapFlags

fn not(self) -> Self

Returns the complement of this set of flags.

type Output = MmapFlags

The resulting type after applying the ! operator.

impl Octal for MmapFlags

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

Formats the value using the given formatter.

impl Ord for MmapFlags

fn cmp(&self, other: &MmapFlags) -> 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 + PartialOrd,

Restrict a value to a certain interval.

impl PartialEq for MmapFlags

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

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

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

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

impl PartialOrd for MmapFlags

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

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

Returns the set difference of the two sets of flags.

type Output = MmapFlags

The resulting type after applying the - operator.

impl SubAssign for MmapFlags

fn sub_assign(&mut self, other: Self)

Disables all flags enabled in the set.

impl UpperHex for MmapFlags

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

Formats the value using the given formatter.

impl Copy for MmapFlags

impl Eq for MmapFlags

impl StructuralEq for MmapFlags

impl StructuralPartialEq for MmapFlags