pub struct FragmentedMapper {
    lock: Mutex<()>,
    inner: UnsafeCell<InnerFragmentedMapper>,
}

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§lock: Mutex<()>§inner: UnsafeCell<InnerFragmentedMapper>

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impl FragmentedMapper

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pub fn new() -> Self

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fn new_slab() -> Box<[Atomic<MapState>; 2048]>

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fn hash(addr: Address) -> usize

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fn slab_table(&self, addr: Address) -> Option<&[Atomic<MapState>; 2048]>

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fn get_or_allocate_slab_table(&self, addr: Address) -> &[Atomic<MapState>; 2048]

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fn inner(&self) -> &InnerFragmentedMapper

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fn inner_mut(&self) -> &mut InnerFragmentedMapper

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fn get_or_optionally_allocate_slab_table( &self, addr: Address, allocate: bool ) -> Option<&[Atomic<MapState>; 2048]>

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fn slab_table_for( &self, _addr: Address, index: usize ) -> Option<&[Atomic<MapState>; 2048]>

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unsafe fn commit_free_slab(&self, index: usize)

Take a free slab of chunks from the freeSlabs array, and insert it at the correct index in the slabTable. @param index slab table index

§Safety

Caller must ensure that only one thread is calling this function at a time.

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fn chunk_index_to_address(base: Address, chunk: usize) -> Address

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fn slab_align_down(addr: Address) -> Address

@param addr an address @return the base address of the enclosing slab

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fn slab_limit(addr: Address) -> Address

@param addr an address @return the base address of the next slab

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fn chunk_index(slab: Address, addr: Address) -> usize

@param slab Address of the slab @param addr Address within a chunk (could be in the next slab) @return The index of the chunk within the slab (could be beyond the end of the slab)

Trait Implementations§

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impl Debug for FragmentedMapper

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

Formats the value using the given formatter. Read more
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impl Default for FragmentedMapper

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl Mmapper for FragmentedMapper

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fn is_mapped_address(&self, addr: Address) -> bool

Return {@code true} if the given address has been mmapped

@param addr The address in question. @return {@code true} if the given address has been mmapped

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fn eagerly_mmap_all_spaces(&self, _space_map: &[Address])

Given an address array describing the regions of virtual memory to be used by MMTk, demand zero map all of them if they are not already mapped. Read more
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fn mark_as_mapped(&self, start: Address, bytes: usize)

Mark a number of pages as mapped, without making any request to the operating system. Used to mark pages that the VM has already mapped. Read more
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fn quarantine_address_range( &self, start: Address, pages: usize, strategy: MmapStrategy ) -> Result<()>

Quarantine/reserve address range. We mmap from the OS with no reserve and with PROT_NONE, which should be little overhead. This ensures that we can reserve certain address range that we can use if needed. Quarantined memory needs to be mapped before it can be used. Read more
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fn ensure_mapped( &self, start: Address, pages: usize, strategy: MmapStrategy ) -> Result<()>

Ensure that a range of pages is mmapped (or equivalent). If the pages are not yet mapped, demand-zero map them. Note that mapping occurs at chunk granularity, not page granularity. Read more
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fn protect(&self, start: Address, pages: usize)

Mark a number of pages as inaccessible. Read more
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impl Send for FragmentedMapper

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impl Sync for FragmentedMapper

Auto Trait Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

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where T: ?Sized,

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Immutably borrows from an owned value. Read more
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Returns the argument unchanged.

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where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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where F: FnOnce(&Self) -> bool,

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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Initializes a with the given initializer. Read more
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Dereferences the given pointer. Read more
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Drops the object pointed to by the given pointer. Read more
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