Struct swim_c::stdlib::MallocHold

pub struct MallocHold<'a> { /* fields omitted */ }

Managed allocator backed by libc malloc.

Methods

impl<'a> MallocHold<'a>

pub fn new() -> Result<RawBox<'a, MallocHold<'a>>, HoldError>

Returns an owned reference to a new Hold that allocates memory blocks using libc malloc.

pub fn global() -> &'a MallocHold<'a>

Returns a reference to a Hold that allocates memory using libc malloc.

pub fn live(&self) -> usize

Returns the number of currently allocated memory blocks in this MallocHold.

pub fn used(&self) -> usize

Returns the number of bytes currently allocated in this MallocHold.

Trait Implementations

impl<'a> Sync for MallocHold<'a>

impl<'a> Send for MallocHold<'a>

impl<'a> Reify<'a, dyn Hold<'a> + 'a> for MallocHold<'a>

unsafe fn deify(object: &mut (dyn Hold<'a> + 'a))

Initialized the Reified structure at the base address of the object reference to the vtable of the object instance.

unsafe fn reify(base: &'a Reified<dyn Hold<'a> + 'a>) -> &'a (dyn Hold<'a> + 'a)

Returns a polymorphic trait object for the concrete type of the object whose base address equals the address of the passed-in Reified reference.

impl<'a> Hold<'a> for MallocHold<'a>

unsafe fn alloc(&self, layout: Layout) -> Result<Block<'a>, HoldError>

Returns an unmanaged pointer to an uninitialized memory block sized and aligned to layout; returns an Err if the allocation fails. The allocated block will have a valid AllocTag in the bytes immediately preceding the block.

unsafe fn dealloc(&self, block: Block<'a>) -> usize

Releases a memory block allocated by this Hold. Returns the number of freed bytes.

unsafe fn resize(
    &self,
    block: Block<'a>,
    layout: Layout
) -> Result<Block<'a>, HoldError>

Attempts to resize in place a memory block allocated by this Hold to fit a new layout. Returns Ok with the resized memory block on success; returns a HoldError on failure.

unsafe fn realloc(
    &self,
    block: Block<'a>,
    layout: Layout
) -> Result<Block<'a>, HoldError>

Attempts to resize a memory block allocated by this Hold to fit a new layout. Returns Ok with the resized memory block on success; returns a HoldError on failure.