[−][src]Struct wr_malloc_size_of::MallocSizeOfOps
Operations used when measuring heap usage of data structures.
Fields
size_of_op: unsafe extern "C" fn(ptr: *const c_void) -> usize
A function that returns the size of a heap allocation.
enclosing_size_of_op: Option<unsafe extern "C" fn(ptr: *const c_void) -> usize>
Like size_of_op
, but can take an interior pointer. Optional because
not all allocators support this operation. If it's not provided, some
memory measurements will actually be computed estimates rather than
real and accurate measurements.
Methods
impl MallocSizeOfOps
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pub fn new(
size_of: unsafe extern "C" fn(ptr: *const c_void) -> usize,
malloc_enclosing_size_of: Option<unsafe extern "C" fn(ptr: *const c_void) -> usize>
) -> Self
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size_of: unsafe extern "C" fn(ptr: *const c_void) -> usize,
malloc_enclosing_size_of: Option<unsafe extern "C" fn(ptr: *const c_void) -> usize>
) -> Self
pub unsafe fn malloc_size_of<T: ?Sized>(&self, ptr: *const T) -> usize
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Call size_of_op
on ptr
, first checking that the allocation isn't
empty, because some types (such as Vec
) utilize empty allocations.
pub fn has_malloc_enclosing_size_of(&self) -> bool
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Is an enclosing_size_of_op
available?
pub unsafe fn malloc_enclosing_size_of<T>(&self, ptr: *const T) -> usize
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Call enclosing_size_of_op
, which must be available, on ptr
, which
must not be empty.
Auto Trait Implementations
impl Send for MallocSizeOfOps
impl Sync for MallocSizeOfOps
Blanket Implementations
impl<T> From for T
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impl<T, U> Into for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom for T where
U: Into<T>,
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U: Into<T>,
type Error = !
🔬 This is a nightly-only experimental API. (
try_from
)The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T> Borrow for T where
T: ?Sized,
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T: ?Sized,
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> BorrowMut for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T, U> TryInto for T where
U: TryFrom<T>,
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U: TryFrom<T>,