Struct MallocSizeOfOps 

pub struct MallocSizeOfOps {
    pub(crate) size_of_op: unsafe extern "C" fn(*const c_void) -> usize,
    pub(crate) enclosing_size_of_op: Option<unsafe extern "C" fn(*const c_void) -> usize>,
    pub(crate) have_seen_ptr_op: Option<Box<dyn FnMut(*const c_void) -> bool>>,
}

Operations used when measuring heap usage of data structures.

Fields

size_of_op: unsafe extern "C" fn(*const c_void) -> usize

enclosing_size_of_op: Option<unsafe extern "C" fn(*const c_void) -> usize>

have_seen_ptr_op: Option<Box<dyn FnMut(*const c_void) -> bool>>

Implementations

impl MallocSizeOfOps

pub fn new( size_of: unsafe extern "C" fn(*const c_void) -> usize, malloc_enclosing_size_of: Option<unsafe extern "C" fn(*const c_void) -> usize>, have_seen_ptr: Option<Box<dyn FnMut(*const c_void) -> bool>>, ) -> MallocSizeOfOps

pub unsafe fn malloc_size_of<T>(&self, ptr: *const T) -> usize

where T: ?Sized,

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

Is an enclosing_size_of_op available?

pub unsafe fn malloc_enclosing_size_of<T>(&self, ptr: *const T) -> usize

Call enclosing_size_of_op, which must be available, on ptr, which must not be empty.

pub fn have_seen_ptr<T>(&mut self, ptr: *const T) -> bool

Call have_seen_ptr_op on ptr.