Struct rustc_arena::TypedArena
source · pub struct TypedArena<T> {
pub(crate) ptr: Cell<*mut T>,
pub(crate) end: Cell<*mut T>,
pub(crate) chunks: RefCell<Vec<ArenaChunk<T>>>,
pub(crate) _own: PhantomData<T>,
}
Expand description
An arena that can hold objects of only one type.
Fields§
§ptr: Cell<*mut T>
A pointer to the next object to be allocated.
end: Cell<*mut T>
A pointer to the end of the allocated area. When this pointer is reached, a new chunk is allocated.
chunks: RefCell<Vec<ArenaChunk<T>>>
A vector of arena chunks.
_own: PhantomData<T>
Marker indicating that dropping the arena causes its owned
instances of T
to be dropped.
Implementations§
source§impl<T> TypedArena<T>
impl<T> TypedArena<T>
sourcepub fn alloc(&self, object: T) -> &mut T
pub fn alloc(&self, object: T) -> &mut T
Allocates an object in the TypedArena
, returning a reference to it.
pub(crate) fn can_allocate(&self, additional: usize) -> bool
pub(crate) fn alloc_raw_slice(&self, len: usize) -> *mut T
sourcepub fn alloc_from_iter<I: IntoIterator<Item = T>>(&self, iter: I) -> &mut [T]
pub fn alloc_from_iter<I: IntoIterator<Item = T>>(&self, iter: I) -> &mut [T]
Allocates the elements of this iterator into a contiguous slice in the TypedArena
.
Note: for reasons of reentrancy and panic safety we collect into a SmallVec<[_; 8]>
before
storing the elements in the arena.
pub(crate) fn clear_last_chunk(&self, last_chunk: &mut ArenaChunk<T>)
Trait Implementations§
source§impl<T> Default for TypedArena<T>
impl<T> Default for TypedArena<T>
source§fn default() -> TypedArena<T>
fn default() -> TypedArena<T>
Creates a new TypedArena
.
source§impl<T> Drop for TypedArena<T>
impl<T> Drop for TypedArena<T>
impl<T: Send> Send for TypedArena<T>
Auto Trait Implementations§
impl<T> !Freeze for TypedArena<T>
impl<T> !RefUnwindSafe for TypedArena<T>
impl<T> !Sync for TypedArena<T>
impl<T> Unpin for TypedArena<T>where
T: Unpin,
impl<T> UnwindSafe for TypedArena<T>where
T: UnwindSafe + RefUnwindSafe,
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Layout§
Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...)
attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.
Size: 48 bytes