Struct syscall::flag::PhysallocFlags
source · pub struct PhysallocFlags { /* private fields */ }
Expand description
Extra flags for physalloc2
or physalloc3
.
Implementations§
source§impl PhysallocFlags
impl PhysallocFlags
sourcepub const SPACE_32: Self = _
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.
sourcepub const SPACE_64: Self = _
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.
sourcepub const PARTIAL_ALLOC: Self = _
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
.
sourcepub const fn from_bits(bits: usize) -> Option<Self>
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.
sourcepub const fn from_bits_truncate(bits: usize) -> Self
pub const fn from_bits_truncate(bits: usize) -> Self
Convert from underlying bit representation, dropping any bits that do not correspond to flags.
sourcepub const unsafe fn from_bits_unchecked(bits: usize) -> Self
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.
sourcepub const fn intersects(&self, other: Self) -> bool
pub const fn intersects(&self, other: Self) -> bool
Returns true
if there are flags common to both self
and other
.
sourcepub const fn contains(&self, other: Self) -> bool
pub const fn contains(&self, other: Self) -> bool
Returns true
if all of the flags in other
are contained within self
.
sourcepub fn set(&mut self, other: Self, value: bool)
pub fn set(&mut self, other: Self, value: bool)
Inserts or removes the specified flags depending on the passed value.
sourcepub const fn intersection(self, other: Self) -> Self
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
.
sourcepub const fn union(self, other: Self) -> Self
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
.
sourcepub const fn difference(self, other: Self) -> Self
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
.
sourcepub const fn symmetric_difference(self, other: Self) -> Self
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
.
sourcepub const fn complement(self) -> Self
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§
source§impl Binary for PhysallocFlags
impl Binary for PhysallocFlags
source§impl BitAnd<PhysallocFlags> for PhysallocFlags
impl BitAnd<PhysallocFlags> for PhysallocFlags
source§impl BitAndAssign<PhysallocFlags> for PhysallocFlags
impl BitAndAssign<PhysallocFlags> for PhysallocFlags
source§fn bitand_assign(&mut self, other: Self)
fn bitand_assign(&mut self, other: Self)
Disables all flags disabled in the set.
source§impl BitOr<PhysallocFlags> for PhysallocFlags
impl BitOr<PhysallocFlags> for PhysallocFlags
source§fn bitor(self, other: PhysallocFlags) -> Self
fn bitor(self, other: PhysallocFlags) -> Self
Returns the union of the two sets of flags.
§type Output = PhysallocFlags
type Output = PhysallocFlags
|
operator.source§impl BitOrAssign<PhysallocFlags> for PhysallocFlags
impl BitOrAssign<PhysallocFlags> for PhysallocFlags
source§fn bitor_assign(&mut self, other: Self)
fn bitor_assign(&mut self, other: Self)
Adds the set of flags.
source§impl BitXor<PhysallocFlags> for PhysallocFlags
impl BitXor<PhysallocFlags> for PhysallocFlags
source§impl BitXorAssign<PhysallocFlags> for PhysallocFlags
impl BitXorAssign<PhysallocFlags> for PhysallocFlags
source§fn bitxor_assign(&mut self, other: Self)
fn bitxor_assign(&mut self, other: Self)
Toggles the set of flags.
source§impl Clone for PhysallocFlags
impl Clone for PhysallocFlags
source§fn clone(&self) -> PhysallocFlags
fn clone(&self) -> PhysallocFlags
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for PhysallocFlags
impl Debug for PhysallocFlags
source§impl Default for PhysallocFlags
impl Default for PhysallocFlags
source§fn default() -> PhysallocFlags
fn default() -> PhysallocFlags
source§impl Extend<PhysallocFlags> for PhysallocFlags
impl Extend<PhysallocFlags> for PhysallocFlags
source§fn extend<T: IntoIterator<Item = Self>>(&mut self, iterator: T)
fn extend<T: IntoIterator<Item = Self>>(&mut self, iterator: T)
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 FromIterator<PhysallocFlags> for PhysallocFlags
impl FromIterator<PhysallocFlags> for PhysallocFlags
source§fn from_iter<T: IntoIterator<Item = Self>>(iterator: T) -> Self
fn from_iter<T: IntoIterator<Item = Self>>(iterator: T) -> Self
source§impl Hash for PhysallocFlags
impl Hash for PhysallocFlags
source§impl LowerHex for PhysallocFlags
impl LowerHex for PhysallocFlags
source§impl Not for PhysallocFlags
impl Not for PhysallocFlags
source§impl Octal for PhysallocFlags
impl Octal for PhysallocFlags
source§impl Ord for PhysallocFlags
impl Ord for PhysallocFlags
source§fn cmp(&self, other: &PhysallocFlags) -> Ordering
fn cmp(&self, other: &PhysallocFlags) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere Self: Sized,
source§impl PartialEq<PhysallocFlags> for PhysallocFlags
impl PartialEq<PhysallocFlags> for PhysallocFlags
source§fn eq(&self, other: &PhysallocFlags) -> bool
fn eq(&self, other: &PhysallocFlags) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd<PhysallocFlags> for PhysallocFlags
impl PartialOrd<PhysallocFlags> for PhysallocFlags
source§fn partial_cmp(&self, other: &PhysallocFlags) -> Option<Ordering>
fn partial_cmp(&self, other: &PhysallocFlags) -> 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 Sub<PhysallocFlags> for PhysallocFlags
impl Sub<PhysallocFlags> for PhysallocFlags
source§impl SubAssign<PhysallocFlags> for PhysallocFlags
impl SubAssign<PhysallocFlags> for PhysallocFlags
source§fn sub_assign(&mut self, other: Self)
fn sub_assign(&mut self, other: Self)
Disables all flags enabled in the set.